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Section VI. Employers Requirements 1
BIDDING DOCUMENT FOR
DESIGN, SUPPLY, INSTALLATION, TESTING &
COMMISSIONING OF ACCEPTANCE TEST
LABORATORY
BID PACKAGE NO.: UREDS-G-10
UNDER IDA CREDIT NO. 5381-BD
Rural Electricity Transmission & Distribution Project
VOLUME: II OF III
(PART II-B)
(EMPLOYER’S REQUIREMENTS)
ISO 9001, ISO 14001 &
OHSAS 18001 Certified
BANGLADESH RURAL ELECTRIFICATION BOARD
(BREB)
HEAD OFFICE, ACADEMIC BUILDING, 6TH FLOOR
NIKUNJA-2, KHILKHET, DHAKA-1229
BANGLADESH
SEPTEMBER 2018
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Section VI. Employers Requirements 2
Bidding Document for
DESIGN, SUPPLY, INSTALLATION, TESTING &
COMMISSIONING OF ACCEPTANCE TEST
LABORATORY
ICB No.: UREDS-G-10
VOLUME: II OF III
(PART II-B)
(EMPLOYER’S REQUIREMENTS)
ISSUED ON: ________________
EMPLOYER: BANGLADESH RURAL ELECTRIFICATION
BOARD (BREB)
PROJECT: UREDS; DCSD (UP-GRADATION OF RURAL
ELECTRICITY DISTRIBUTION SYSTEM;
DHAKA, CHITTAGONG & SYLHET
DIVISION) PROJECT UNDER RURAL
ELECTRICITY TRANSMISSION AND
DISTRIBUTION (T&D) PROJECT OF IDA.
COUNTRY: BANGLADESH
SEPTEMBER 2018
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VOLUME: II OF III
(PART II-B)
(EMPLOYER’S REQUIREMENTS)
TABLE OF CONTENTS
SECTION VI: EMPLOYER’S REQUIREMENTS
.............................................................3
3.0 Building Equipment and Different Systems Technical
Speciffactions....................4
4.0 Civil: General Technical Requirements for Building Works
..............................117
5.0 Civil: Building and Ancillary
Facilities..................................................................138
6.0 Civil: Building Sanitary and Water Supply Works &
Ancillary Facilities ........188
7.0 Civil: Internal & External Electrification, CCTV, PABX
& PAS ......................201
8.0 Miscelleaneous: Desktop Computer, Printer, Photocopy Machine
.....................219
9.0 Miscelleaneous: Air Conditioning
..........................................................................223
10.0 Miscelleaneous: Laboratory Furniture
................................................................225
11.0 Fire Detection & Firefighting Protection
.............................................................227
12.0 Forms & Procedures
..............................................................................................230
13.0 Floor Plans
..............................................................................................................248
14.0 Contacts
..................................................................................................................253
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SECTION VI
B. CIVIL
3.0 Building Equipment and Different Systems Technical
Specifications
Table of Contents
Description Specification # Page No.
Overhead Bridge Crane 100 ton Specification # 34 5
Lifts/Elevators (passenger and cargo)
Specification# 35
31
Close Circuit TV (CCTV) System for
monitoring
Specification# 36 51
Public Address (PA) System
Specification# 37
61
PABX System Specification# 38
71
Fire-Fighting System Specification# 39
79
Generator Set Specification# 40
103
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5
Specification# 34
BANGLADESH RURAL ELECTRIFICATION BOARD (BREB)
Technical Specification
Overhead Bridge Crane - 100 Ton
1. Scope
1.1 This specification covers minimum technical requirements for
the design, supply, assembly, installation, testing and
commissioning of an Overhead Bridge Crane (on turn key basis)
for
loading and unloading power transformers at Bangladesh Rural
Electrification Board (BREB)
material Acceptance Testing Laboratory at Palli Biddyut Area,
Savar Dhaka, Bangladesh.
1.2 The 100 ton bridge crane shall consist of parallel runways
with a travelling bridge spanning the gap. A hoist will be the
lifting component of the crane, travels along and across the
bridge. The
bridge shall be rigidly supported on steel columns to be fixed
at ground level. Study and design
of crane shall be the responsibility of the vendor to be
approved by BREB.
1.3 Any departure from the provisions of this specification
shall be disclosed at the time of bidding under the title
“deviation from specifications”.
1.4 This specification is property of BREB and subject to change
or modification without any notice.
2. Reference Standards
2.1 The Overhead Bridge Crane shall be supplied according to
this specification. The Crane shall be designed, tested, assembled
and conform to the latest editions of relevant
applicable international standards in practice to their design,
construction, production and
testing including but not limited to those listed below, and
their normative references:
ASME B30.2: Overhead and Gantry Cranes (Top Running Bridge,
Single or Multiple Girder, Top Running Trolley Hoist)
ASME B30.17: Cranes and Monorails (with underhung Trolley or
Bridge)
ASME B30.11: Monorails and Underhung Cranes
BS 466: Specification for Power driven overhead travelling
cranes, semi-goliath and goliath cranes for general use
ISO 4301-5: Cranes; classification; part 5: overhead travelling
and portal bridge cranes
ISO 8686-5: Cranes; design principles for loads and load
combinations; part 5: overhead travelling and portal bridge
crane
ASD & LRFD: Manual of Steel Construction
AISC: American Institute of Steel Construction
AISE: Technical Report No. 6
ANSI a 14.3-1992: Safety Requirements for fixed ladders
ASME B30.9: Slings
ASME b30.10: Hooks
ASME B30.20: Below-the-Hook Lifting Devices
Applicable Bangladesh standards for safety, operation and
protection
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2.2 Conformance to national standards only, such as Chinese,
Indian, or Russian is not acceptable.
3. Experience and Quality Control
3.1 The Crane components, assemblies and accessories shall be
manufactured at a plant that has fabricated units of similar design
and characteristics for a period not less than ten years and
that
holds ISO: 9001-2015 Certification for the quality
management.
4. Service Conditions
4.1 The Crane components, assemblies and accessories shall be
suitable for performing tests in a testing laboratory under the
local service conditions in Bangladesh, which are as follows
a) Altitude above mean sea level (MSL): less than 1,000 meters
b) Maximum summer peak ambient temperature: +45°C c) Minimum
outdoor winter temperature: 3°C d) Average daily temperature: +35°C
e) Maximum yearly average temperature: +30°C f) Relative Humidity:
50% - 100% g) Yearly average Humidity: 80% h) Pollution level:
Moderate i) Storage temperature: -10°C - +70°C j) Operating
temperature: -10°C - +45°C
5. Clearances
5.1 Safe and working clearances shall be maintained between the
crane, the building, other objects, infrastructure or electric
wires during normal operating conditions.
5.2 In the design, all factors that influence, such as wheel
float, truss sag, bridge skewing or trolley positions and
configuration shall be considered.
5.3 Schedule of working clearances shall be provided with the
design for review and approval.
6. Technical Specifications
6.1 The overhead bridge crane shall be used for the purpose of
handling power transformers up to load of 100 ton at a transformer
testing bay.
6.2 The crane shall be used for continuous duty with cross
travel, long travel and hoist movement, which may occur
simultaneously.
6.3 This specification is adopting definitions from ASME B30-2.
Therefore, for cross references applicable Standards as given
clause 2 shall be consulted, referred and applied.
6.4 The master controller shall be wired and used by the
operator. No cabin would be required.
6.5 The crane shall be designed, assembled and tested before
dispatch. At site crane shall be installed, tested and
commissioned. The technical and other parameters shall be as
follows:
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Technical Specifications
Capacity 100 ton lifting capacity
Hoist limit 100 ton (keep factor of safety in view)
Span Wheel center to wheel center
Long Travel 30 meters (refer to floor plan)
Cross Travel 15 meters (refer to floor plan) with 10m centered
on the lab railroad and 5m laydown area to the left (facing the
doors from
inside) of the railroad. Height of lifting 10/11 meters from
ground level with dual/variable speed (effective
hook height shall be 10m) Operating and Working
Speed maximum (m/s) Vendor to specify for the offered crane for:
a) Hoist b) Cross Travel c) Long Travel
Duty Cycle (related to
Drive Motor &
Mechanisms)
Vendor to specify for the offered crane for: a) Hoist b) Cross
Travel c) Long Travel
Motor Ratings Electric Drive Motor
Ratings & Frame size
Vendor to specify for the offered system for: a) Hoist b) Cross
Travel c) Long Travel
Gear Box Vendor to specify for the offered system for: Gear Box
Size for: a) Hoist b) Cross Travel c) Long Travel
Acceleration mm/s Vendor to specify for the offered crane for:
a) Hoist b) Cross Travel c) Long Travel
Hoist Rope Size and
number of falls of rope Vendor to confirm as below and specify
for the offered Crane
System Control Wired Master Control (No cabin operation)
Type of Control Wired Master Control
Input Voltage 240/415 ± 5% Volts, 50 Hz, 3 Phase - AC
Control Voltage 110 V AC or as proposed by the vendor
Duty Class Class -3, Indoor Service
Design Standards ASME/IEC /ANSI/IEEE/BS
Runway Rail Size for Cross
Travel Vendor to specify for the offered crane (kN/m)
Runway Rail Size for Long
Travel Vendor to specify for the offered crane (kN/m)
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Wheel Size for Cross
Travel Vendor to specify for the offered crane (dia. mm)
Wheel Size for Long Travel Vendor to specify for the offered
crane (dia. mm)
Brake Drum Size for Hoist Vendor to specify for the offered
crane (dia. mm)
Brake Drum Size for Cross
Travel Vendor to specify for the offered crane (dia. mm)
Brake Drum Size for Long
Travel Vendor to specify for the offered crane (dia. mm)
Brake Drum Size for
Parking Brake Vendor to specify for the offered crane (dia.
mm)
Crane Type Double Girder, Top running *Rail size shall be
designed by the supplier and vendor to provide
calculations for review Bridge Travel Motorized, geared, dual
speed, had chain drop
*supplier to design based on site requirements and vendor to
provide calculations for review
Bridge Beam and Columns Required *sizes shall be as per design
requirements and vendor to provide
calculations for review Trolley Type Motorized, geared with
dual/variable speed
Control System Conventional master control for all motions
Crane operations Through wire master control
Operator Cabin None
Structural Fabrication Crane Structural Constructional
Details
Bridge Leg Box type construction
Raw material Only steel plates, tested and certified quality
Welded Joints To be followed for Bridge/leg Fabrication
Number of Joints To be followed for Bridge/leg Fabrication
Number of Joints For span up to 25 meters - two joints, for span
25 meters to 50 meters - three joints
Welding Electrodes Electrode only should be used: For all
Horizontal Welding: E 7018
For all Vertical Welding: E 7048.
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Welded Joint Testing All Butt-Welded Joints (both compression /
tension and flanges / web joints) shall be subjected to 100% X-Ray
Testing and X-Ray.
Films to be produced toBREB for evaluation and shall form part
of
technical submission.
Splice Joint No splice joint is allowed in girder
fabrication.
Leg connection Leg to bridge connection shall be designed for
double shear.
Platform on Girders The Platforms provided on both the Girders
shall be fixed through bolted joints using fit bolt only.
Wheel Assembly The Wheel Assembly coming for Cross Travel (CT)
& Long Travel (LT) shall be of live axle system with L-Type
Bearings.
Heat Treatment The Trolleys (where applicable) shall be Stress
Relieved by thermal heat-treatment process after welding and
non-destructive
testing (NDT) examinations. All welding shall be tested by
NDT
means [MPI, LPI & RT] after Stress Relieving operation.
Machining Operation All mechanical mating surfaces and wheel
seating areas are to be
machined to the required finish and protected.
Surface Cleaning Both the Girders and the Trolleys are to be
shot blasted or chemically treated for surface cleaning, after
completion of all
operations but prior to painting. Painting The crane parts are
to be painted as follows:
One coat of Primer with 25 microns of DFT (Dry Film
Thickness)
and 48 hours of compulsory curing after painting. Two coats
of
Enamel Paint (Yellow) each with a DFT of 25 microns and
intermittent curing of minimum 16 hours.
Gears Gears in all the stages shall be helical in design and to
be of machined & ground and hardened.
Gear Box Casing Shall be of fabricated type and stress relived
by thermal heat-treatment process, prior to machining
Type of Coupling Only geared coupling to be used: a) between
Electric Motor and Gear Box b) between Gear Box and Rope Drum c)
between Gear Box and Trolley Wheels
Rope Drum Shall be of fabricated type and stress relieved. The
circumferential weld joints shall be tested by 100 % X-Ray for
quality assurance.
Wheels The wheels shall be of Drop-Forged and wheel tread
hardened to 300/350 BHN (Brinell Hardness Number). Wheels shall be
fitted with L-Type Bearings
Mechanical Joints Fit Bolts as per IS 3640-1982 for all joints
coming in main members and platform with reamed holes
Pulley Dimension Rope Pulley diameter shall be 23 times that of
Rope diameter Hook
Hook latch shall be provided for both hooks Wind Clamp
Wind clamp shall be provided in all four corners
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Roof Covering Single Roof cover shall be provided for trolley
and long travel mechanisms
Electrical Elements
Operational Controls The offered Crane shall be provided with
the following controls: a) Cabin Control [Master Control] b) Radio
Remote Control [Push Button Type]
Control Voltage 110V/220 V AC
Type of Brakes a) Hoist: DC Brake b) Cross Travel: Thruster
Brake c) Long Travel: Thruster Brake d) Parking Brake: DC Brake
Protection: All Panels, Limit-Switches and Motors shall have IP
54 protection. (Outdoor Service)
Electric Motors All Electric Motors shall be as per
IIEC/ANSI/IEEE and also suitable for 500 starts per hour and 40 %
CDF.
Electric Contactors All Panels shall have only SIEMENS (make)
Contactors and shall be suitable for AC3 Duty Class.
Contactors Rating The rating of all Contactors shall be at least
50% higher than the respective electric motor full load current, at
the specified duty
cycle. Resistance Stainless steel punched grid resistance
continuous rating
Long Travel Motion A dual Drive Mechanism shall be provided for
Long Travel Motion.
Illumination Four numbers of 500 Watts Halogen Lamps shall be
provided under the Bridge, All Electric Panels shall be provided
with
suitable long-lifeillumination for visibility and trouble
shooting
Controller Steps: A 5-Step Controller has to be provided for a.
Main Hoist
b. Long Travel
c. Cross Travel
Load Cell for Main Hoist Load weighing system with load cell to
be fixed/provided at the equalizer pulley
The display shall be of 100 mm size-Jumbo Crab Wiring The CRAB
shall be fully wired with junction box
Hoist Limit Each hoist shall be provided with both rotary and
counter weight limits
Operator Cabin Electric Light, Fan, Exhaust-Fan, Warning Bell
and Emergency Stop Push Button shall be provided in the operator
cabin
Sources Only US or Western European Sources materials are
acceptable
Hoist Hooks Vendor to specify for the offered crane
Wire Rope Vendor to specify for the offered crane
Electric Motors GEC/siemens
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DC Brake Unit Vendor to specify for the offered crane
Radio Control Vendor to specify for the offered crane
Thrust Brake Unit Vendor to specify for the offered crane
Limit Switch (Gravity
Type) Siemens
Contactors (make) Siemens
Overload Relay for
protection (make) Siemens
HRC Fuses (make) Siemens
Rotary Limit Switch (make) Siemens
Switch Fuse Unit (make) Siemens
MCCB (make) Siemens, Schneider Electric
MCB (make) Siemens, Schneider Electric
Pneumatic Time Delay
(make) Vendor to specify for the offered crane
Push Button (make) Siemens
Connectors (make) Siemens
Couplings Vendor to specify for the offered crane
Bearings Vendor to specify for the offered crane
Power & Control Cables
IEC /ANSI/IEEE/BS Certified
Load Cell Vendor to specify for the offered crane
Resistance Box Vendor to specify for the offered crane
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7. Runways and Supporting Structures
7.1 The crane shall be supported on its own steel structure
independent of the building structure, with foundations independent
of the building floor and foundations. Crane vendor shall
design
fabricate and supply the supporting steel structure in
accordance with standards and
specifications, with safety factor of at least 50%, or such
other greater factor required by
standards, above maximum loading in any component or structural
element resulting from
lifting of 100 ton and moving it at standard speed in the least
favorable location or
circumstance.
7.2 Construction of Runways and rails shall be in accordance
with the ASME B 30.2 and shall conform to AISC Manual of Steal
Construction. The crane runways and supporting structures
shall be designed to withstand the loads, forces and impacts
imposed by the crane during
operations.
7.3 The Runway columns shall be securely anchored to the
foundations. Foundation design calculations shall be provided for
review and evaluation by BREB.
7.4 The structure shall be free from the detrimental vibrations
under normal operating conditions.
7.5 Rails shall be level, straight, joined, and spaced to the
crane span within the specified tolerance limits in CMAA
specification No. 70. Where curves are required, special design
shall be
necessary.
7.6 Runway stops shall be provided to the limits of travel of
the bridge.
7.7 Stops shall be designed to withstand the forces applied to
the bumpers.
8. Welded Construction
8.1 All welding procedures and welding operator's qualifications
to be used on load-sustaining members shall be in accordance with
ANSI/AWSD11, except as modified by
ANSI/AWSD14.1.
9. Girders
9.1 All crane shall conform to the design parameters as
specified, and applicable, in CMAA specification No. 70 or SIE
Technical Report No.6.
10. Bridge-Bumpers
10.1 A power operated bridge shall be provided with the bumpers
or other automatic means providing equivalent effect.
10.2 Bridge bumper shall have minimum characteristics as
specified in ASME B30-2, as follows:
a) Energy-absorbing (or energy-dissipating) capacity to stop the
bridge when traveling with
power off in either direction at a speed of at least 40% of
rated load speed.
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b) The capability of stopping the bridge (but not the load block
or lifted load unless they are
guided vertically) at a rate of deceleration not to exceed an
average of 3 ft/sec2 (0.9 m/s2)
when traveling with power off in either direction at 20% of
rated load speed and be
designed and installed with a means of retaining the bumper in
case of broken or loosened
mounting connections.
c) Multiple power-operated bridges operating on the same runway
shall have contact bumpers
that meet the requirements of ASME B30-2.
10.3 Consideration should be given to providing bumpers with
greater capacity for energy absorption (or energy dissipation) than
that specified in ASME B30-2and providing bridge end
stops with corresponding increased strength, when anyone of the
following conditions are
present:
a) The crane has a maximum bridge speed of 320 ft/min (100
m/min) or greater. b) The crane is a remote-operated crane. c) The
crane is a pulpit-operated crane. d) The location of the runway end
stops is obscured or uncertain. e) As an example, the bumper force
applied at 100% of rated load speed is 625% greater than
the bumper force applied at 40% of rated load speed.
11. Trolley-Bumpers
11.1 A power-operated trolley shall be provided with bumpers or
other automatic means providing equivalent effect.
11.2 Trolley bumpers shall have the following minimum
characteristics:
a) energy-absorbing (or energy-dissipating) capacity to stop the
trolley when traveling with
power off in either direction at a speed of at least 50% of
rated load speed.
b) the capability of stopping the trolley (but not the load
block or lifted load unless they are guided vertically) at a rate
of deceleration not to exceed an average of 4.7 ft/sec
2 (1.4 m/s
2)
when traveling with power off in either direction at one-third
of rated load speed.
c) be designed and installed with a means of retaining the
bumper in case of broken or loosened mounting connections.
11.3 Consideration should be given to providing bumpers with
greater capacity for energy absorption (or energy dissipation) than
that specified in and providing bridge end stops with
corresponding increased strength when anyone of the following
conditions are present:
a) The trolley has a maximum speed of 150 ft/min (46 m/min) or
greater. b) The trolley is on a remote-operated crane. c) The
trolley is on a pulpit-operated crane.
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12. Bridge Rail Sweeps
12.1 Bridge truck rail sweeps shall be provided in front of the
leading wheels on both ends of the bridge end truck.
12.2 The rail sweep shall clear the rail of objects on the
runway which, if they came into contact between the wheel and rail,
could cause damage to the wheel or derail the wheel.
a) Clearance between the top surface of the rail head and the
bottom of the sweep should not
exceed 3/16in.(5 mm).
b) On overhead crane end trucks, the sweep shall extend below
the top surface of the rail head, for a distance not less than 50%
of the thickness of the rail head, on both sides of the
rail head.
c) On gantry crane end trucks, when the railhead is located
above the pavement or ground level, the sweep shall extend below
the top surface of the rail head, for a distance not less
than 50% of the thickness of the rail head, on both sides of the
rail head.
d) Clearance between the vertical inside surfaces of the sweep
should be equal to the wheel tread width plus 3/8 in. (10 mm), and
clearance should be evenly spaced on each side of the
wheel tread width.
13. Trolley Rail Sweeps
13.1 Trolley truck rail sweeps should be provided in front of
the leading wheels on both ends of the trolley end truck.
13.2 The rails sweep shall be clear of objects on the bridge,
which could come into contact between the wheel and rail, and cause
damage to the wheel or derail the wheel.
a) Clearance between the top surface of the rail head and the
bottom of the sweep should not
exceed 3/16 in. (5 mm)
b) The sweep shall extend below the top surface of the rail
head, for a distance not less than
50% of the thickness of the rail head, on both sides of the rail
head.
c) Clearance between the side surface of the rail head and the
side of the sweep which extends
below the top surface of the rail head should be equal to crane
float plus 3/16 in. (5 mm).
14. Guard Moving Parts
14.1 Exposed moving parts, such as gears, set screws, projecting
keys, and drive chain and sprockets, which constitute a hazard
under normal operating conditions, shall be guarded.
14.2 Each guard shall be capable of supporting, without
permanent deformation, the weight of a 200 Ibs (90 kg) person,
unless the guard is located where it is not possible that a person
will step on
it-ASME B15.1
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15. Hoist Handling Brakes
15.1 Each hoisting unit of the crane shall be equipped with at
least one holding brake. The holding brake shall be applied to the
motor shaft or a gear reducer shaft and shall have a torque
rating
not less than the percentage of rated load hoisting torque at
the point where the brake is applied
as follows:
a) 125% of rated load hoisting torque when used with a control
braking means other than mechanical
b) 100% of rated load hoisting torque when used with a
mechanical control braking means .. c) 100% of rated load hoisting
torque for each brake if two holding brakes are provided
15.2 Each hoist holding brake shall have thermal capacity for
the frequency of operation required by the service.
15.3 Hoist holding brakes shall be applied automatically, when
power to the brake is removed.
15.4 Hoist holding brakes shall be provided with means to adjust
for lining wear.
16. Hoist Control Braking Means
16.1 Each hoisting unit of the crane shall be equipped with a
control braking means that will control the load during lowering to
a maximum speed of 120% of rated lowering speed for the load
being handled.
16.2 Hoist control braking means can be electrical, such as
regenerative, dynamic, counter-torque, or eddy-current; mechanical;
hydraulic; or a worm-geared hoist, where the angle of the worm
is
such as to prevent the load from accelerating in the lowering
direction.
16.3 Hoist control braking means shall have thermal capacity for
the frequency of operation required by the service.
17. Trolley Brakes and Braking Means
17.1 A power-driven bridge shall be equipped with either a
braking means or have bridge drive frictional characteristics that
will provide stopping and holding functions, under conditions
where the rails are dry as follows:
a) have torque capability to stop bridge travel within a
distance in feet (meters) equal to 10%
of rated load speed in ft/min. (m/min.) when traveling with
rated load.
b) have torque capability to impede horizontal motion of the
bridge against a horizontal force equal to 1% of the combined
weight of the bridge, trolley, hoist, and rated load when the
bridge is in parked condition.
17.2 A power-driven, cab-operated crane shall be equipped with a
bridge brake that will provide the stopping and holding functions
described in ASME B30-2.
17.3 Each bridge brake shall have thermal capacity for the
frequency of operation required by the service.
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18. Trolley and Bridge Brake Provisions
18.1 General provisions as outlined below apply to, as merited,
trolley and bridge brakes.
a) Brakes may be applied by mechanical, electrical, pneumatic,
hydraulic, or gravitational
means.
b) Brakes shall be provided with means of adjustment to
compensate for lining wear. c) Brake pedals, latches, and levers
should allow release without the exertion of greater force
than was used in applying the brake.
d) Foot-operated brakes shall require an applied force of not
more than 70 lbs. (310 N) to develop rated brake torque.
e) Foot-operated brake pedals shall be so constructed that the
operator's foot will not readily slip off the pedal.
f) Foot-operated brake pedals should be so located that they are
convenient to the operator at the controls.
g) Foot-operated brakes shall be equipped with a means for
positive release, when force is released from the pedal.
h) When provided, a parking brake shall:
i. be applied automatically or manually.
ii. impede horizontal motion of the trolley or bridge in
accordance with the requirements of ASME B30-2.
iii. not prohibit the use of a drift point in the control
circuit.
i) When provided, a service-brake shall:
i. be applied manually by the operator during normal operation
ii. stop trolley or bridge travel in accordance with the
requirements ASME B30-2
j) When provided, a drag brake shall provide a continuous
retarding torque, without external control.
k) When provided an emergency brake shall:
i. be applied when initiated by the operator, or automatically
upon loss of power.
ii. Stop trolley or bridge traveling accordance with the
requirements of ASME B30-2.
iii. impede horizontal motion of the trolley or bridge in
accordance with the requirements of ASME B30-2.
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19. Electrical Equipment
19.1 Wiring and equipment shall comply with Article 610 of
ANSI/NFPA No. 70, National Electrical Code.
19.2 The control circuit voltage shall not exceed 600V for AC or
DC.
19.3 The control circuit voltage in pendant push buttons shall
not exceed 150V for AC or 300V for DC.
19.4 Where multiple conductor cable is used with a suspended
push-button station, the station shall be supported so that the
electrical conductors are protected from strain.
19.5 Pendant control stations shall be constructed to prevent
electrical shock. The push-button enclosure shall be at ground
potential and marked for identification of functions.
19.6 Electrical equipment shall be located or enclosed so that,
under normal operating conditions, energized parts will not be
exposed to inadvertent contact.
19.7 Energized parts of electrical equipment shall be protected
from direct exposure to grease, oil, and moisture, and they should
be protected from dirt.
19.8 If guards are provided for energized parts, the guards
shall be constructed or located so that they cannot be deformed,
under normal operating conditions, to make inadvertent contact
with
energized parts.
19.9 Cables, Controllers, Switches, Contactors, Relays and
Protection shall comply the relevant ANSI/IEEE/IEC standards.
20. Runway Conductors
20.1 Conductors of the open type, mounted on the crane runway
beams or overhead, shall be so located or guarded that persons
cannot inadvertently come into contact with the energized
conductors under normal
21. Sheaves
21.1 Sheave grooves shall be free from surface defects, which
could cause rope damage. The cross-sectional radius at the bottom
of the groove should be such as to form a close-fitting saddle
for
the size of rope used. The sides of the groove shall be tapered
outward and rounded at the rim
to facilitate entrance of the rope into the groove. Flange rims
shall run true about the axis of
rotation.
21.2 Sheaves carrying ropes, which can be momentarily unloaded,
shall be provided with close-fitting guards, or other devices, to
guide the rope back into the groove, when the load is
reapplied.
21.3 The sheaves in the bottom block shall be equipped with
close-fitting guards that will minimize the possibility of ropes
becoming fouled when the block is lying on the ground with the
ropes
loose.
21.4 All running sheaves shall be equipped with means for
lubrication. Permanently lubricated, sealed, or shielded bearings
shall be acceptable.
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22. Drums
22.1 Rope drums shall be grooved, except when the crane is
provided by the manufacturer for a special application. This
requirement does not preclude the use of multiple layer spooling.
The
grooves shall be free from surface defects that could cause rope
damage. The cross-sectional
radius at the bottom of the groove should be such as to form a
close-fitting saddle for the size of
rope used.
23. Chain
23.1 The hoisting chain shall be of a recommended construction
for crane service. The total load (rated load plus weight of load
block) divided by the number of parts of line shall not exceed
20% of the minimum breaking strength of the chain.
24. Hooks
24.1 Hooks shall meet the manufacturer's recommendations and
shall not be overloaded. If hooks are of the swiveling type, they
should rotate freely. Latch-equipped hooks shall be used unless
the application makes the use of the latch impractical or
unnecessary. When required, a latch or
mousing shall be provided to bridge the throat opening of the
hook for the purpose of retaining
slings, chains, or other similar parts, under slack conditions
as per ASME B30.10.
25. Guards for Hoisting Chain
25.1 If it is possible for hoisting ropes to foul or chafe on
adjacent parts of the crane under normal operating conditions,
guards shall be installed to minimize damage to the chain.
25.2 A guard shall be provided to prevent contact between bridge
or runway conductors and hoisting chain if, under normal operating
conditions, they can come into contact.
26. Paint
26.1 The Crane parts are painted as follows:
a) One coat of premier with 25 microns of DFT (dry film
thickness) and 48 hours of compulsory
curing after painting.
b) Two coating of long lasting Enamel paint color-Yellow, each
with DFT of 25 microns and intermittent curing of minimum 16
hours.
c) Lifting Hook shall also be painted Yellow. d) Girders,
Trolleys, Columns are to be shot blasted or chemically treated for
surface cleaning,
after completion of all operations but prior to painting.
e) All nut, bolts and fixing shall be suitable protected against
corrosion.
27. Warning Devices
27.1 All warning devices shall be provided appropriately, where
necessary. The warning devices shall comply the ASME B30-2. Type of
devices shall be as follows:
a) Manually operated gong
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b) Power-operated bell, siren or horn c) Rotating beacon d)
Strobe light
28. Warnings
28.1 Crane shall have labels in compliance with ANSI Z535.4 and
shall include cautionary language (in English and Bangla)
against:
a) Lifting more than rated load b) Operating hoist when load is
not centered under hoist c) Operating hoist with twisted, kinked,
or damaged chain d) Operating damaged or malfunctioning crane e)
Lifting people f) Lifting loads over people g) Operating a chain
hoist that is not properly seated in its grove h) Operating manual
motions with other than manual power i) Removing or obscuring
safety label j) Disconnect power and lockout disconnecting means
before removing cover or servicing
this equipment
k) Do not operate without cover in place
29. Warranty
29.1 The manufacturer's standard warranty shall cover the
performance of the total Crane and/or the Components /
Sub-Assemblies / Bought-Out-Items and shall be guaranteed for a
minimum
period of two (2) years from the date of performance acceptance
at BREB material acceptance
Lab.
30. Installation, Testing and Commissioning
30.1 Installation, Testing and Commissioning shall be the
responsibility of the Vendor.
30.2 Commissioning of the Crane and performance prove-out for
the Crane‟s capacity and smooth functioning of the Crane (at BREB
Works) shall be the responsibility of the supplier.
31. Operating and Maintenance Manual
31.1 The Crane shall be provided with detailed operating and
maintenance manual and user‟s guide containing technical
specifications, safety warnings, important technical data and
circuit
diagrams in English language.
a) Installation b) Operation c) Inspection d) Testing e)
Lubrication (where necessary accessible means and directions for
lubrication shall be
provided)
f) Maintenance g) Parts h) Wiring diagram (may be supplied
separately)
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31.2 Personnel responsible for the supervision, installation,
operation, inspection, or maintenance of the crane shall be
familiar with the applicable contents of the manual furnished with
the crane.
a) Crane GA drawings b) Crab assembly drawings c) Total crane
wiring scheme d) Detailed wiring drawings of sub-systems/panels e)
Drive's logic circuits drawings f) Wheel assembly drawings g) Gear
Box assembly drawings h) Couplings Drawings and details i)
Specifications/Ratings of all bought-out items j) Warranty Cards
for all Bought-out items k) Trouble shooting charts for main and
sub-system
32. Training and Safe Use
32.1 The supplier shall conduct training sessions to BREB staff
on the use of the Crane and controls for operation, sub-assemblies
and components etc. shall be given training on safe operation
of
the machines, operation and maintenance (O&M) and use of
controls, emergency, safety etc.
including other functions and features.
32.2 The training shall comprise of a balanced combination of
classroom training and hands-on experience and shall cover all
aspects of equipment operation.
33. Tests
33.1 The manufacturer shall provide at the time of tender,
certificates attesting to the fact that conformance type tests have
been performed successfully on the machines of the Crane.
33.2 Acceptance Tests: Acceptance tests will be conducted before
shipment. Test protocol shall be provided by the supplier and
approved by the client. If unit fails the acceptance tests the
offered
Crane shall be rejected. The acceptance tests shall be as
follows:
a) Verification of Test Certificates for Raw Materials used for
Girders, End-Carriages, Trolleys,
Gear Box Casings, etc.
b) Verification of X-Ray Report of Butt Joints coming in the
Girders and Random Testing on the Welds, by physical
examination
c) Box Girder setting before closing of the Bottom Flanges for
inspecting the quality of welding and presence of waviness.
d) Trolley Frame Fabrication before setting the Mechanisms e)
End-Carriage Fabrication f) Inspection of Bridges and End-Carriages
with Wheel Assembly and Alignment checking. g) Verification of Span
& Diagonal Dimensions, Checking of Wheel Alignment,
Mechanical
Assemblies and Total Alignment.
h) Free running of the all the Mechanisms i) Measurement of
"CAMBER" in the Bridges j) Full / Rated Load Test and Deflection
Test. Deflection and Permanent Set measurements. k) 25% over-load
lifting ability
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34. Markings and Name Plate
34.1 Rated load on the crane shall be marked on each side of the
crane and shall be legible from ground or floor.
34.2 The rated load of the Hoist shall be marked on the hoist or
trolley or its load block and shall be legible from ground or
floor.
34.3 The following information shall be given on the name
plate:
a) Manufacturer‟s name and address b) Manufacturer‟s model,
serial number, year of manufacture, and identifying number c)
Maximum loading/unloading capacity d) Factor of safety e) Civil,
Electrical and Mechanical design parameters f) Manufacturer logo g)
Weight and size h) Power, AC voltage and frequency i) Essential
Circuit diagram j) Protection (IP) class k) Applicable standards l)
All other important data as necessary
35. Packaging and Shipping
35.1 Export packaging and shipping shall be adequate for sea
transport and handling up to delivery site in Bangladesh.
35.2 The material shall be sealed in plastic bags or other
suitable moisture proof materials and packed in sturdy arrangement
in completely assembled condition. Each crate shall contain test
equipment and installation instructions.
35.3 The material shall be skidded, crated, boxed or otherwise
suitably protected against damage or loss during shipment and to
facilitate field hand storage. All openings shall be
effectively
sealed with temporary closures to prevent entry of dust, dirt,
moisture and other foreign matter.
35.4 The cover of the main crate shall carry the following
information written in English:
a) Number of test equipment contained therein b) Manufacturer‟s
catalog number c) Description of the material d) Manufacturer‟s
name e) Purchase order number f) Gross weight in kg g) Bar code
35.5 Additional handling and shipping instructions shall be
obtained from BREB, as applicable.
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36. Technical Data, Drawings and Submittal
36.1 The supplier/manufacturer shall provide hard and soft
copies of the technical data, catalogues, documentation and
information with the bid submittal of Crane, as follows:
a) Engineering design (civil, electrical and mechanical)
calculations of the bridge crane. b) General Arrangement (GA)
drawings of the crane. c) GA drawings of crab with trolley. d)
Drawings of bridge, End-Carriage and their connections. e) GA of
individual mechanism. f) Sub-assembly drawings of Wheels, Hook
Blocks, Gear Boxes, Hoist Drums. g) Engineering calculations for
selection of electric -motors, gear reducers, brakes, couplings
etc. h) Calculations for Bridge Girder, Crab End-Carriage and
their connections. i) Wiring drawings of electric circuits. j)
Calculations for power and control cables design and ratings. k)
Total weight of crane including all Electrical equipment. l) Total
weight of Trolley including all electrical equipment. m) Weight of
each Bridge assembled and ready for erection with or without
Mechanical and
Electrical equipment. n) Weight of each End-Carriage assembled
and ready for erection. o) Total Weight of Structural, Mechanical
and Electrical Equipment and indicated separately
indicated. p) Complete list of BOQs of items in the package. q)
Certified calibration test reports. r) Packaging details. s) Terms
of manufacturer‟s warranty. t) Manufacturer‟s certificate attesting
to 10 years of experience in manufacturing. u) Statement of country
of origin. v) Copy of ISO:900-2015 Certification for the
manufacturing plant. w) Copies of test certificates evidencing
completion of qualification tests. x) List of clients in last five
years with their respective addresses, which were supplied
overhead
bridge cranes of similar rating. y) Confirmation in writing that
the equipment and materials will be supported technically and
in
parts availability for a minimum of 10 years from the date
installed.
z) Clause by clause conformance with this specification and a
list of explanations for any deviations from or exceptions to these
specifications.
36.2 If no exceptions are taken to this specification and no
list of deviations is submitted, it shall be deemed that in every
respect the offered test equipment conforms to this
specification.
Purchaser‟s interpretation of this specification shall be
accepted.
36.3 In case of conflict or ambiguity, the vendor may propose a
value with corresponding reference standards without effecting the
requirements of this specification.
36.4 Vendor shall visit the site to take measurements, note
clearances and discuss BREB requirements, before their technical
bid submittal for evaluation.
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37. Ground Floor Plan (For Concept Only) Vendor shall visit site
and take measurements, clearances and information before design
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Guaranteed Technical Particulars-Overhead Bridge Crane
a) To be filled up by the bidder with appropriate data,
otherwise the Bid will be rejected. b) Failure to provide all of
the information requested may lead to the rejection of the bid. c)
Bidder to list offered capability. d) Statement of “Comply” only is
not acceptable.
Sr No Description REB Requirement Bidder's Guaranteed
Value
1 Manufacturer /Supplier name/title
Only North American or Western
Europe sources are acceptable
2 Manufacturer/Supplier address and contacts
Required
3 Reference Standards As specified in clause 2 *Conformance to
national standards only, such as Chinese, Indian, or Russian is
not
acceptable.
4 Experience and Quality Control
As specified in clause 3
5 Service Conditions As specified in clause 4
6 Capacity 100 ton lifting capacity
7 Hoist limit 100 ton (keep factor of safety in view)
8 Span Wheel center to wheel center
9 Long Travel 30 meters (refer to floor plan)
10 Cross Travel 15 meters (refer to floor plan) with 10m
centered on the lab railroad and 5m
laydown area to the left (facing the
doors from inside) of the railroad.
11 Height of lifting 10/11 meters from ground level with
dual/variable speed (effective height
shall be 10m)
12 Operating and Working Speed maximum (m/s)
Vendor to specify for the offered crane
for: a) Hoist b) Cross Travel c) Long Travel
13 Duty Cycle (related to Drive Motor & Mechanisms)
Vendor to specify for the offered crane
for: a) Hoist b) Cross Travel c) Long Travel
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25
14 Motor Ratings Vendor to specify for the offered system a)
Hoist b) Cross Travel c) Long Travel
15 Electric Drive Motor Ratings & Frame size
16 Gear Box Vendor to specify for the offered system Gear Box
Size for: a) Hoist b) Cross Travel c) Long Travel
17 Acceleration mm/s Vendor to specify for the offered crane
for: a) Hoist b) Cross Travel c) Long Travel
18 Hoist Rope Size and number of falls of rope
Vendor to specify for the offered crane
System for:
19 Control Control by wired master pendant with push button
hanging in air
20 Type of Control Wired master control
21 Input Voltage 240/415 ± 5% Volts, 50 Hz, 3 Phase - AC
22 Control Voltage 110 V AC or as proposed by the vendor
23 Duty Class Class -3, Indoor Service
24 Design Standards ASME/IEC /ANSI/IEEE/BS
25 Runway Rail Size for Cross Travel
Vendor to specify for the offered crane
(kN/m)
26 Runway Rail Size for Long Travel
Vendor to specify for the offered crane
(kN/m)
27 Wheel Size for Cross Travel Vendor to specify for the offered
crane (dia. mm)
28 Wheel Size for Long Travel Vendor to specify for the offered
crane (dia. mm)
29 Brake Drum Size for Hoist Vendor to specify for the offered
crane (dia. mm)
31 Brake Drum Size for Cross Travel
Vendor to specify for the offered crane
(dia. mm)
32 Brake Drum Size for Long Travel
Vendor to specify for the offered crane
(dia. mm)
33 Brake Drum Size for Parking Brake
Vendor to specify for the offered crane
(dia. mm)
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26
34 Crane Type Double Girder, Top running *Rail size shall be
designed by the
supplier and vendor to provide
calculations for review
35 Bridge Travel Motorized, geared, dual speed, had chain drop
*supplier to design based on site
requirements and vendor to provide
calculations for review Required *sizes shall be as per
design
requirements and vendor to provide
calculations for review
36 Bridge Beam and Columns
37 Trolley Type Motorized, geared with dual/variable speed
38 Control System Conventional master control for all
motions
39 Crane operations Wired master control
40 Operator No operator cabin is needed, operator to handle
through wired master control
41 Structural Fabrication Crane Structural Constructional
Details
42 Bridge Leg Box type construction
43 Raw material Only steel plates, tested and certified
quality
44 Welded Joints To be followed for Bridge/leg Fabrication
45 Number of Joints To be followed for Bridge/leg
Fabrication
46 Number of Joints For span up to 25 meters - two joints, for
span 25 meters to 50 meters - three
joints
47 Welding Electrodes Electrode only should be used: · For all
Horizontal Welding: E 7018 ·For all Vertical Welding: E 7048.
48 Welded Joint Testing All Butt-Welded Joints (both compression
/ tension and flanges / web
joints) shall be subjected to 100% X-
Ray Testing and X-Ray Films to be
produced for BREB evaluation and
form part of technical submission.
49 Splice Joint No splice joint is allowed in girder
fabrication
50 Leg connection Leg to bridge connection shall be designed for
double shear.
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27
51 Platform on Girders The Platforms provided on both the
Girders shall be fixed through bolted
joints using fit bolt only.
52 Wheel Assembly The Wheel Assembly coming for Cross Travel
(CT) & Long Travel (LT) shall
be of live axle system with L-Type
Bearings.
53 Heat Treatment The Trolleys (where applicable) shall be
Stress Relieved by thermal heat-
treatment process after welding and
non-destructive testing (NDT)
examinations. All welding shall be
tested by NDT means [MPI, LPI & RT]
after Stress Relieving operation.
54 Machining Operation All mechanical mating surfaces and wheel
seating areas are to be machined
to the required finish and protected
55 Surface Cleaning Both the Girders and the Trolleys are to be
shot blasted or chemically treated
for surface cleaning, after completion
of all operations but prior to painting.
56 Painting The crane parts are to be painted as follows: One
coat of Primer with 25 microns of
DFT (Dry Film Thickness) and 48
hours of compulsory curing after
painting. Two coats of Enamel Paint
(Color –Yellow) each with a DFT of 25
microns and intermittent curing of
minimum 16 hours.
57 Gears Gears in all the Stages shall be helical in design and
to be of machined &
ground and hardened.
58 Gear Box Casing Shall be of fabricated type and stress
relived by thermal heat-treatment
process, prior to machining
59 Type of Coupling Only geared coupling to be used: a) between
Electric Motor and Gear
Box b) between Gear Box and Rope Drum c) between Gear Box and
Trolley
Wheels
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28
60 Rope Drum Shall be of fabricated type and stress relieved.
The circumferential weld
joints shall be tested by 100 % X-Ray
for quality assurance.
61 Wheels The Wheels shall be of Die-Forged and Wheel Tread
hardened to 300/350
BHN (Brinell hardness number).
Wheels shall be fitted with L-Type
Bearings
62 Mechanical Joints Fit Bolts as per IS 3640-1982 for all
joints coming in main members and
platform with reamed holes
63 Pulley Dimension Rope Pulley diameter shall be 23 times that
of Rope diameter
64 Hook Hook latch shall be provided for both hooks
65 Wind Clamp Wind clamp shall be provided in all four
corners
66 Roof Covering Single Roof cover shall be provided for trolley
and long travel mechanisms
67 Electrical Elements
68 Operational Controls The Crane shall be provided with the
Wired master control to be used by
operator manually
69 Control Voltage 110V/220 V AC
70 Type of Brakes a) Hoist: DC Brake b) Cross Travel: Thruster
Brake c) Long Travel: Thruster Brake d) Parking Brake: DC Brake
71 Protection: All Panels, Limit-Switches and Motors shall have
IP 54 protection. (Outdoor
Service)
72 Electric Motors All Electric Motors shall be as per
IIEC/ANSI/IEEE and also suitable for
500 starts per hour and 40 % CDF.
73 Electric Contactors All Panels shall have only SIEMENS
Contactors and shall be suitable for
AC3 Duty Class.
74 Contactors Rating The rating of all Contactors shall be at
least 50% higher than the respective
electric motor full load current, at the
specified duty cycle.
75 Resistance Stainless steel punched grid resistance continuous
rating
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76 Long Travel Motion A dual Drive Mechanism shall be provided
for Long Travel Motion.
77 Illumination Four numbers of 500 Watts Halogen Lamps shall be
provided under the
Bridge, All Electric Panels shall be
provided with suitable illumination for
visibility and trouble shooting
78 Controller Steps: A 5-Step Controller has to be provided for
a. Main Hoist b. Long Travel c. Cross Travel
79 Load Cell for Main Hoist Load weighing system with load cell
to be fixed/provided at the equalizer
pulley
The display shall be of 100 mm size-
Jumbo
80 Crab Wiring The CRAB shall be fully wired with junction
box
81 Hoist Limit Each hoist shall be provided with both rotary and
counter weight limits
82 Cabin Electric Light, Fan, Exhaust-Fan, Warning Bell and
Emergency Stop
Push Button shall be provided in the
Operator Cabin
83 Sources Only US or Western European Sources materials are
acceptable
84 Hoist Hooks Vendor to specify for the offered crane
85 Wire Rope Vendor to specify for the offered crane
86 Electric Motors GEC/Siemens (make)
87 DC Brake Unit Vendor to specify for the offered crane
88 Radio Control Vendor to specify for the offered crane
89 Thrust Brake Unit Vendor to specify for the offered crane
90 Limit Switch (Gravity Type) Siemens
91 Contactors (make) Siemens
92 Overload Relay for protection (make)
Siemens
93 HRC Fuses (make) Siemens
94 Rotary Limit Switch (make) Siemens
95 Switch Fuse Unit Vendor to specify for the offered crane
96 MCCB (make) Siemens, Schneider Electric
97 MCB (make) Siemens, Schneider Electric
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98 Pneumatic Time Delay Vendor to specify for the offered
crane
99 Push Button (make) Siemens
100 Connectors (make) Siemens
101 Couplings (make) Vendor to specify for the offered crane
102 Bearings Vendor to specify for the offered crane
103 Power & Control Cables IEC /ANSI/IEEE/BS Certified
104 Load Cell Vendor to specify for the offered crane
105 Resistance Box Vendor to specify for the offered crane
106 Name & signature of authorized representative
with date
107 Official Seal/Stamp
Note:
a) Vendor shall provide clause by clause conformance of this
technical specification with the
submittal duly signed and stamped
b) List of deviations (If any)
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31
Specification# 35
BANGLADESH RURAL ELECTRIFICATION BOARD (BREB)
Technical Specification
Lifts/Elevators (for Passenger and Goods)
1. Scope
1.1 This Guide Specification covers General Technical
requirements for the design, supply, installation, testing,
commissioning and handing over on turn key basis (TKB) of two
(2)
microprocessor-based, Elevators/Lifts complete in all respects
(including brake release tools)
for a three (3) story building in phase -I, which will be
extended to eight (8) stories later in
phase-II, for Bangladesh Rural Electrification Board (BREB)
material Acceptance Testing
Laboratory at Palli Biddyut Area, Savar Dhaka, Bangladesh, as
follows:
a) One (01ea.) Passenger Elevator/Lift - capacity for 12
passengers - 1000kG b) One (01ea.) Goods Elevator/Lift - capacity 3
ton
1.2 Scope of work shall include Annual Maintenance Contract
(AMC) for three (3) years and one (1) year of Defect Liability
Period (DLP), after handing over to Bangladesh Rural
Electrification Board (BREB), inclusive of periodic servicing,
prompt attention to client
(BREB) complaint, prompt rectification of all malfunctions and
equipment failures,
replacement of defective equipment / parts, replacement of light
fittings/fixtures, lubrication -
including lubricants, maintaining correct alignment and
levelling of cars and ensuring smooth
running, starts and stops etc. all complete to BREB‟s
satisfaction shall be done.
1.3 Any departure from the provisions of this specification
shall be disclosed at the time of bidding under the title
“deviation from specifications”.
1.4 This specification shall be read in conjunction with the
terms and conditions of the Contract.
2. Reference Standards
2.1 Elevator/Lift shall conform to the latest editions of the
standards applicable to their design, construction, operation and
application including but not limited to those listed below, and
their
normative references:
ADAAG Americans with Disabilities Act Accessibility
Guidelines.
ANSI/NFPA 70 National Electrical Code.
ANSI/NFPA 80 Fire Doors and Windows.
ASME/ANSI A17.1 Safety Code for Elevators and Escalators glass
insulators-suspension type
ANSI/UL 10B Fire Tests of Door Assemblies
ISO 630 Standards for structural steels
ASME Safety Codes and Standards, ADA standards and ASME Code A
17.1 & A 18.1
ISO 22201:2017 (Amended to date) for Lifts and Elevators
BS Building and safety codes
IEC/ANSI Standards
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32
The Contractor shall follow Bangladesh and International
Statutory Requirements as well as best trade
practices in the manufacture & installation of
Elevators/Lifts. The Contractor shall arrange to obtain
the statutory approval of the Inspectorate of Lifts as may be
required for commissioning of the lifts
and handover for operation after satisfactory tests. The
equipment and installation covered by these
specifications shall conform to codes of practice in force and
highest standards of safety,
workmanship and materials. This work shall be done in accordance
with the provisions of the "Local
Lifts Authority Rules" and shall also conform to requirements of
local Municipal by laws, and
subsequent provisions, as also local Act in force for safety and
operation.
3. Experience and Quality Control
3.1 The Electric Elevators /Lifts shall be manufactured at a
plant that has fabricated units of similar design and
characteristics for a period not less than ten years and that holds
ISO: 9001
Certification for the quality management.
4. Service Conditions
4.1 The Electric Elevators/ Lifts shall be suitable for the
laboratory building under the local service conditions in
Bangladesh, which are as follows:
k) Altitude above mean sea level (MSL): less than 1,000 meters
l) Maximum summer peak ambient temperature: +45°C m) Minimum
outdoor winter temperature: 3°C n) Average daily temperature: +35°C
o) Maximum yearly average temperature: +30°C p) Relative Humidity:
50% - 100% q) Yearly average Humidity: 80% r) Pollution level:
Moderate s) Storage temperature: -10°C - +70°C t) Operating
temperature: -10°C - +45°C
5. Design and Performance Specifications
5.1 The Electric Elevators /Lifts shall meet or exceed the
technical and performance requirements of this specification in all
respects and shall have minimum technical features as given
below:
a) Passenger Elevator capacity: 12 Passengers /Loading Capacity
(approximately):
1000kg (supplier to keep factor of safety in load design)
b) Goods Elevator capacity: 3.0 ton (supplier to keep factor of
safety in load design) c) Number of stops: 3 stops d) Design:
Supplier to design both the Elevators for eight stories but this
installation
will be for a three (3) story building
e) Type: Microprocessor/PLC based logic controlled Electric
Elevators f) Inside car height: Supplier to design after field
verify
g) Door Opening/Closing Time:
1.80 seconds for Center Opening /
2.5 second closing 4.0 seconds for Side Slide Openings / 4.5
seconds close
h) The following parameters shall be achieved in the
installation:
Levelling Accuracy: + 3 mm for 1.5 m/s speed and + 4 mm for 0.75
m/s speed; under any loading condition or direction of travel
Jerk level: 0.9 – 1.5 m/s3
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33
Noise level in car: 50 dB
Noise level in machine room: 60 dB
Acceleration rate: 0.6 – 1.0 m/s2 (adjustable)
Max. car vibration: 20 milli gals
Hall Signal Frequency: 1500Hz max. (300-3000Hz verbal
annunciator)
Hall Signal level: 10dB above ambient, 80dB max.
Vendor shall specify above parameters for the offered Elevators
and associated equipment in the
technical data sheet.
5.2 Car Operating Features: The car shall answer calls in the
order in which floors are reached, without respect to the time
sequence in which the calls were registered. Only car calls and
up
hall calls shall be answered when the car is traveling in the up
direction, and only car calls and
down hall calls hall be answered when the car is traveling in
the down direction, except in the
case of the highest or lowest calls, which are answered as soon
as they are reached, regardless
of the direction of travel of the car. When the car reaches the
last registered call for the
established direction, it shall reverse and proceed to answer
calls in the opposite direction if
they are; (bidder shall specify this parameter for the offered
machine in the technical data
sheet).
5.3 Anti-Nuisance: If an excessive number of car calls (quantity
to be adjustable) are registered and the passenger load as
determined by the weight sensors is less than a predetermined
weight,
all car calls shall be canceled requiring re-registration of
calls.
5.4 Call Parking Recognition: Field Verify/ Car doors shall only
open in response to car and hall demand. Cars being parked without
call demand will be parked without door operation.
5.5 Direction Preference: At the final stop (highest or lowest
call), direction preference shall be given to the hall passenger
whereby, if a passenger registers a car call for the original
direction
of travel before the doors close, it shall not be possible for a
waiting passenger at another floor
to call the car in the reverse direction.
5.6 Direction Reversal: A car without registered car calls
arriving at a floor where both up and down hall calls are
registered and the hall call is the last one in that direction,
shall first respond
to the hall call in the direction that the car was traveling;
and if no car call is registered for
further travel in that direction, the car shall close its doors
and immediately re-open them in
response to the hall call in the opposite direction. The hall
lantern shall always show the
direction the car will travel, when it leaves a floor.
5.7 Fan and Light Protection: Maximum clamping thickness of flat
specimen (mm): 70/75mm (vendor shall specify this parameter for the
offered machine in the technical data sheet).
5.8 Hall Button Protection: If the hall button signal system
fails, all of the cars in the group shall enter Hall Button
Protection operation. Each car shall answer all pending car calls.
When each
car has no further demand, each car shall travel to the lobby
and shut down with the doors
open.
5.9 Landing Passing Tone: An audible signal located in car
operating panel shall sound when the car passes or stops at a
landing.
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5.10 Independent Service: Actuation of the Independent Service
switch shall remove that car from normal group operation,
permitting it to respond only to calls registered on car buttons
and
making the door close operation subject to the Door Close
Button. A car operating on
Independent Service shall not respond to hall calls. Car and/or
hall lantern operation shall be
suspended. A Call Cancel push-button shall be provided on the
car-operating panel. When the
button is activated all registered calls shall be canceled and a
traveling car will stop at the next
landing.
5.11 The sensor shall be long-life and rugged.
5.12 The Elevators/ Lifts shall have built-in overload and
electrical surge protection.
5.13 In case of conflict or ambiguity, the vendor may propose a
value with corresponding reference standards without effecting the
requirements of this specification.
Vendor shall specify all the above parameters for the offered
machine in the technical data sheet.
6. Fire Fighting Service Operation Features:
6.1 Firefighters Service Phase-I: When a building smoke sensor
or a key switch located at the designated return landing is
activated, all cars in the group shall perform an emergency
return
to the designated landing. The return operation shall be in
compliance with applicable codes.
Passengers shall be alerted that the car is returning by a
buzzer and a message indicator
showing "Please Exit when Doors open" and a Fireman's Hat light
is also illuminated.
6.2 Alternate Return Landing for Phase-I: The car(s), while
responding to a Phase 1 Firefighters' Service operation, shall
return to a reselected alternate landing if the smoke
detector at the designated return landing has been
activated.
6.3 Firefighters Service Phase-II: This feature shall be
activated by the firefighting personnel using a key switch in the
car and shall place the elevator under their control. The
operation
shall be in compliance with applicable codes. This feature shall
include a Call Cancel push-
button. When the button is activated all registered calls will
be canceled and a traveling car will
stop at the next landing.
7. Maintenance and Operation (M&O) Features:
7.1 Top of Car Inspection: Enabling switches in the car
operating panel and on top of the car shall make the car and hall
buttons inoperative and allow the controls in a fixture on the top
of the
car to be used to move the car at reduced speed for
installation, inspection, and maintenance.
This operating station shall include a push-button, which must
be continuously depressed to
permit the elevator to move in either the up or down direction.
The top-of-car inspection station
shall include a 240V, 15 Amp convenience outlet with
ground-fault-circuit-interrupter
protection and a convenience light with switch. The top of car
fixture shall also include an
emergency stop button.
7.2 Pit Emergency Switch: A switch, accessible from the pit
access door, shall be provided for each car. When a switch is
activated, the corresponding car shall stop running.
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8. Security Features:
8.1 ADA Emergency Communications: This feature shall provide an
"Alarm Received" message indicator in the car operating panel
fixture having an "Alarm" message indicator, key switch,
and buzzer. An Alarm Button in the car-operating panel shall
activate the message indicator
and buzzer in the hall fixture. Activating the key switch in the
hall fixture shall illuminate the
"Alarm Received" message indicator in the car.
8.2 Door Control Features/Closed Loop Control: Closed loop
control Operator will be installed to allow for smooth operation
under varying environmental influences such as, temperature,
wind, friction, and component variation. It will meet the
specified door times and required
position and velocity profiles, with consistent running results
at all landings.
8.3 Operating and Closing Times: Opening and closing speeds are
adjustable. The system will limit closing speed (and hence the
time) based on the code requirement of kinetic energy,
which depends on the door mass. The code may limit the speed of
a heavy bronze lobby door,
but at another floor we can move the doors quicker.
8.4 Door Noise: Door noise will be 50dBA. This include
reversals.
8.5 Door Control and Closing: Door control to open doors
automatically when car arrives at a landing in response to a normal
hall or car call. Elevator doors shall be provided with a
reopening device that will stop and reopen the car door(s) and
hoistway door(s) automatically
should the door(s) become obstructed by an object or person.
a) Primary door protection shall consist of a two-dimensional,
multi-beam array projecting across the car door opening. Under
normal operation and for any door position, the system shall detect
as
a blockage an opaque object that is equal to or greater than 1.3
inches (33 mm) in diameter when
inserted between the car doors at vertical positions from within
1 inch (25 mm) above the sill to
71 inches (1800 mm) above the sill. Under degraded conditions
(one or more blocked or failed
beams), the primary protection shall detect opaque objects that
are equal to or greater than 4" (100
mm) in diameter for the same vertical coverage. If the system
performance is degraded to the
point that the 4" object cannot be detected, the system shall
maintain the doors open or permit
closing only under nudging forces conditions. The door reopening
device shall also include a
secondary, three-dimensional, triangular infrared multi-beam
array projecting across the door
opening and extending into the hoistway door zone.
b) The door-opening device will cause the doors to reopen when
it detects a person(s) or object(s) entering or exiting the car in
the area between the hoistway doors or the entryway area adjacent
to
the hoist way doors.
c) At door separations of 18" or less the secondary protection
system may cease its normal operation since the depth of the zone
recedes to where it is inside the hoistway doors. The vertical
coverage
of the secondary protection shall be ~19" (480 mm) above the
sill to ~55" (1400 mm) above the
sill (mid-thigh to shoulder of a typical adult).
d) The size of the secondary protection zone shall vary as the
door positions vary during opening and closing. The width of the
zone shall be approximately one-third the size of the separation
between
the doors (and door and strike plate for single-slide doors) and
shall be approximately centered in
the door separation. In order to minimize detection of hallway
passers-by that are not entering the
elevator, the maximum zone penetration into the entryway shall
not exceed 20" for any door
separation. Normal penetration depth into the entryway from the
car doors shall be ~14" for a
door separation of 42". The penetration shall reduce
proportionally as the doors close.
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e) The secondary protection shall have an anti-nuisance feature,
which will ignore detection in the secondary zone after continual
detection occurs for a significant time period in the secondary
zone
without corresponding detection in the primary protection zone;
i.e. a person/object is in the
entryway but does not enter. Normal secondary protection shall
be re-enabled, whenever detection
occurs in the primary zone.
f) The reaction time of the door detector sub-system shall not
exceed 60 milliseconds when both primary and secondary protection
capabilities are active; nor 40 milliseconds when the secondary
protection is disabled.
8.6 Door Nudging: Door nudging operation to occur, if doors are
prevented from closing for an adjustable period of time.
8.7 Adjustable Door Dwell Time: The time interval that elevator
doors stand open after a stop shall be independently adjustable for
car call stops and hall call stops. A separate door time
shall be adjustable for lobby door hall calls.
8.8 Nudging: If the doors are prevented from closing for a fixed
time period, the Car Door Protective Device shall be rendered
inoperative, a buzzer shall sound on the car and the doors
shall close at approximately half speed and torque. Normal
operation shall resume at the next
landing reached by the car.
8.9 Door Time Open Protection: If the car doors do not open
completely within a predetermined time, the car shall extinguish
its hall and car direction lanterns (if provided), sound the
in-car
alarm buzzer, and shall if part of a group, remove itself from
group operation. Then the car
shall proceed to the next landing in its direction of travel (or
reverse direction from a top or
bottom landing) and again attempt to open its doors fully. If
the car moves to three consecutive
landings without being able to open its doors fully, it shall
shutdown with the doors closed.
8.10 Door Time Close Protection: If the Nudging Operation does
not completely close the car doors within a predetermined time, the
car will extinguish its hall and car direction lanterns (if
provided), sound the in-car alarm buzzer, and shall, if part of
a group, remove itself from group
operation. Then the car shall open its doors fully and again
attempt to close them. If the car
cannot fully close its doors after three attempts, it shall
shutdown with the doors open. Every
two minutes the car shall retry closing its doors.
8.11 Door Protection: Infrared door protection shall be
installed.
8.12 Car and Hoist Doors: To be installed as per
requirements.
9. Materials
9.1 Steel: Sheet Steel for Exposed Work: Stretcher-leveled,
cold-rolled, commercial-quality carbon steel, complying with ASTM
A366, matte finish.
9.2 Sheet Steel for Unexposed Work: Hot-rolled,
commercial-quality carbon steel, pickled and oiled, complying with
ASTM A569. Structural Steel Shapes and Plates: ASTM A36 and
AISI
1018.
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9.3 Stainless Steel: Type 300 Series complying with ASTM A167,
with standard tempers and
hardness required for fabrication, strength and durability.
Supply with mechanical finish on fabricated work in the location
shown or specified with texture and reflectivity required
(Federal and NAAMM
Nomenclature). Protect with adhesive plastic
film or paper covering.
All finishes specified as "satin" to be Manufacturer's standard
directional polish that complies
with commercial No. 4 requirements.
All finishes specified as
"mirror" to be Manufacturer's
standard mirror polish that complies with commercial No. 8
requirements.
9.4 Bronze: Cold finished muntz metal type UNS C28000-H02
complying with ASTM
B36/B36M.
Supply with mechanical finish on fabricated work in
the location shown or specified with texture and reflectivity
required (Federal and NAAMM nomenclature) Protect
with adhesive plastic film or paper covering.
All finishes
specified as "satin" to be Manufacturer's standard directional
polish that complies with commercial No. 4 requirements.
All finishes specified as "mirror" to be Manufacturer's standard
mirror polish that complies
with commercial No. 8 requirements.
9.5 Aluminum: Extrusions per ASTM B221; sheet and plate per ASTM
B209.
9.6 Plastic Laminate: ASTM E84 Class A and NEMA LD3, Fire-rated
Grade (FR-50), 0.050" (1.3 mm) up to 1/16" (1.6 mm) nominal
thickness.
9.7 Exposed surfaces: to have color and texture selected by
Architect from Manufacturer's standard selection.
9.8 Fire Retardant Treated Particleboard Panels: Minimum 1/2"
(16 mm) thick backup for natural finished wood and plastic laminate
veneered panels, edged and faced as shown, proved
with suitable anti-warp backing; to meet ASTM E84 Class "A"
rating with flame-spread rating
of 25 or less, registered with appropriate authorities for
elevator finish materials.
9.9 Natural Finish Wood Veneer: Standard thickness 1/36" (0.7
mm) to 1/42" (0.6 mm), thoroughly dried conforming to ANSI/HPMA
HP-1983, Premium Grade. Specified finish to be
chosen from elevator manufacturer's standard selection.
9.10 Paint: Unexposed Steel and/or Iron: Clean exposed metal of
oil, grease, scale and other foreign matter and paint one shop coat
of Manufacturer's standard rust-resistant primer. Primer shall
be
of a low V.O.C. water-based type. Galvanized metal need not be
painted.
9.11 Exposed Steel: Clean exposed metal of oil, grease, scale
and other foreign matter. Eliminate any dents, scratches, or other
defects that would affect the final finish. For material
delivered
with primer coat only, apply two coats of manufacturer's
standard powder coated primer. For
material delivered with a finish coat apply an additional two
coat of manufacturer's standard
powder coated of a color selected by the Architect from the
manufacturer's standard color
selection.
10. Equipment
10.1 Controller: A microcomputer-based control system shall be
provided to perform all of the functions of safe elevator motion.
Included shall be all of the hardware required to connect,
transfer and interrupt power, and to protect the motor against
overloading. The system shall
also perform car and group operational control.
Each controller
cabinet containing memory equipment shall be properly shielded from
line pollution. The microcomputer system shall be
designed to accept reprogramming with minimum system down time.
All high voltage (230V or above) contact points inside the
controller cabinet shall be protected from accidental contact
in a situation where the controller doors are open.
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10.2 Motion Control: A microprocessor-based motion control
system with a dictated position and velocity profile shall be
provided.
10.3 Remote Elevator Monitoring: Install a remote monitoring
device to allow 24 hours off site monitoring of the health of the
elevator system and to dispatch a service call as required in
an
entrapment.
11. Design and Drawings
11.1 Before commencing work, the Contractor shall design,
prepare and submit all drawings for individual two (2) lifts (One
passenger and one goods Elevator/Lift) as specified (in
required
number of sets) necessary to show the general arrangement and
details of lifts installation,
electrical, mechanical and civil etc. These drawings must be
approved by the Consultant/BREB
before installation and shall become part of the contract.
11.2 The Contractor shall, within 3 (three) weeks of receipt of
a Letter of award of Contract, submit 4 (four) copies of all
working drawings showing pit, hoistway and machine room layouts
clearly indicating and specifying all connected structural,
electrical and architectural works
including imposed structural static / dynamic loads (including
breaking load on guides, reaction
of buffers on lift pits, reaction on support points in machine
room, lift well etc.) and electrical
ratings including calculations for selection of kW rating of
motor. Within 10 days of receipt of
letter of award of Contract, the Contractor shall obtain from
the concerned BREB approved
Authority all the information he needs to prepare his drawings
and shall have any interaction
with the concerned Authority to finalize all parameters and data
for design.
11.3 The Contractor will be responsible for any discrepancies,
errors and omissions in the drawings or particulars submitted by
him even if these have been approved by the concerned BREB
approved Authority. On approval of these drawings (within 2
weeks of submission of full
documentation), the Contractor shall submit 4 (four) copies of
approved working drawings
incorporating corrections / comments, if any, and shall
immediately commence work.
11.4 On completion of work, the contractor shall supply four
sets of soft copies and 4 (four) copies of the detailed wiring
diagram, „As built‟ drawings and equipment operation and
maintenance
manuals and original certificates from „Inspector of Lifts‟ for
all the lifts. Further, a copy of
such detailed diagram and a set of instructions for evacuation
of passengers in case of
breakdown of the lifts shall be framed and installed in the
respective machine room by the
Contractor.
11.5 The Contractor shall carry out all the work strictly in
accordance with drawings, details and instructions of concerned
BREB approved Authority.
12. Works to be arranged for Contractor
12.1 The following items shall be provided to the Elevator
Contractor under instructions of the Project Manger to suit the
requirements of the Contractor.
a) Hoistways, machine rooms and pits of specified dimensions
(within normal building tolerances).
b) Floor, wall and ceiling finishes in Hoistways, pits and
machine rooms; including painting (except painting of equipment and
materials supplied by lift Contractor) and waterproofing, as
well as doors and windows in machine room. Cables from main L.T.
Panel Board through the
Hoistwaysterminating in and including individual Main Switches
of required rating for three
phase and single-phase supply in Machine Rooms including
necessary earthing.
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c) Free three phase power supply for group testing and
commissioning of lifts after erection is completed.
d) Lighting installation within machine rooms as required by the
lift Contractor including single-phase main switch with ELCB at
machine room.
e) The equipment shall be suitable to operate on 230/415 Volts 3
phase, 4 wires, 50 Hz. A.C. supply with a variation of +10% in
Volts and +5% in frequency respectively. The supply for
illumination and single-phase equipment shall be 230 Volts
A.C.
f) Lighting installation within Hoistwaysand pits as required by
the lift Contractor including 1-phase main switch at machine
room.
g) Ventilation system of machine rooms with minimum 18" heavy
duty exhaust fan in each machine room as per the requirement of
applicable codes and standards.
h) Providing of hoisting beam in the machine room for hoisting
of equipment during erection and to facilitate maintenance in
future.
13. Elevators Contractor’s Responsibilities: Ancillary Works
a) All cabling, wiring and earthing from three phase main DB in
machine room to Lift
Contractor‟s equipment.
b) All steel items i.e. machine beam/bases, pedestals/ bearing
plate in the machine room, separators wherever required and buffer
support channels, vertical iron ladder in lift and
structural steel supports and brackets for the installation in
etc., to suit the sizes of the
hoistways.
c) Sill tracks including sill supports, supporting protection at
all landings. d) Screen guards, facia plates and other protection
for installation. e) To carry out minor civil work, such as
chipping & making openings in slabs, grouting of
foundation bolts in shaft, pit and machine room, modification
and making rail bracket, hall
buttons indicators and laying of sills in positions. Or any
other work required for smooth
operation/ commissioning of lifts. All chiselling and cutting of
pockets and making good.
(All cutting shall be as approved by Consultant/BREB).
f) Ensuring safety against accidents including barricading all
openings and caution signs. g) Scaffolding and other Tools &
Tackles required for installation in the Hoistwayrequired for
erection of lifts.
h) All other items necessary for satisfactory execution &
completion of works, whether specified or not.
i) Power shall be provided at incoming of main DB for lifts.
Main DB in the machine room shall be provided by the lift
contractor. From main DB to lifts, cables shall be in the scope
of
lift contractor. However, lighting for machine room shall be
done by others.
j) Trap doors, floor gratings, steps / ladders and openings in
machine rooms and ladders for pits as required by the lifts
Contractor. Contractor shall furnish the details of these items in
the
layout drawing for lifts to be submitted after award of the
job.
k) Temporary power supply connection(s) for erection work shall
be arranged by the lift Contractor.
l) Electrical: Electrical service to main disconnect in elevator
machine room; electrical power for elevator installation and
testing; electrical-disconnecting device to elevator equipment
prior to activation of sprinkler system; electrical service for
machine room; machine room and
pit receptacles with ground - fault current protection; lighting
in machine room and pit; wiring
for telephone service to machine room.
m) Fire Alarm System: Fire and smoke detectors and
interconnecting devices; fire alarm signal lines to contacts in the
machine room. System not to be self-resetting. System may or may
not
be tied to the building fire life safety system. Subject to
local fire code.
n) Telephone System: Telephone System required for the emergency
communications equipment single dial tone outside line will be
required per elevator and will be run to the
corresponding controller.
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14. Sound Reduction
14.1 The Contractor shall provide necessary sound reduction
materials, such as rubber pads/ anti vibration pads of proper
density to effectively isolate the machine from the machine
beams
and/or flooring.
14.2 Noise level inside cars and in the machine-room shall be
maintained at minimum levels as laid down in the relevant codes and
in any case not more than specified under performance
parameters.
15. Traction Machine:
15.1 The machine shall be worm geared traction type with motor
(steel worm, bronze gears, steel sheave shaft & Ferro
molybdenum sheave), electro-mechanical type of brake and
driving
sheave mounted in proper alignment on a single heavy cast iron
base or steel bedplate.
15.2 The worm shaft shall be fitted with roller bearings to take
end thrust. The sheave shaft shall also be fitted with ro