MS Exposed Conduit Rev06

PROJECT: EXCHANGE SQUARE (STREET 106 SITE) TITLE OF WORK: METHOD STATEMENT FOR LIGHTNING PROTECTION, EARTHING AND WELDING INSTALLATION AT BASEMENT 3F

project: EXCHANGE SQUARE (STREET 106 SITE)title of work: METHOD STATEMENT for EXPOSED CONDUITS INSTALLATION 23. FEBrUARY. 2015-----------------------------------------------------------------------------------------------------------------------------------------------

METHOD STATEMENT FOR EXPOSED CONDUITS INSTALLATION

Submission Ref. : PSC-HK-MS-E-0003Representative ofPrepare bySub contractorChecked byPOSCOApproved byPOSCOConsultant

Signature

Name

Date

Content1.Introduction31.1Purpose31.2Scope31.3Exclusion32.General32.1Program (Working period: 5-May-2015 ~ 4-April-2016)32.2Location - Address42.3Approvals42.4Labor resources42.5Communications52.6Site Resources Required52.7Temporary materials52.8Protection52.9Equipment/Tools52.10Hot works62.11Confine space works72.12Emergency & Safety Equipment72.13Materials required for installation92.14Schedule of drawings112.15Schedule of inspections/T&C form122.16Attendees122.17Safety Briefing122.18Mitigation of Risk123.Actual Works Method Statement123.1Visual Inspection123.2Installation133.3Air Tests213.4Water Tests213.5Flow Tests213.6Electrical Tests213.7Setting to work213.8Test Records213.9T&C Register213.10Reports224.Appendix244.1Shop Drawing number PSC-HK-SD-ELC-002-Rev2 (Waiting Approval)24

IntroductionPurposeTo describe electrical works associated with installation of exposed conduits for protection of power cables from mechanical abuse and a serious fire risk if the wires are damaged or cut.ScopeThis method statement is covering the electrical works related to areas having cables running outside concrete walls, brick walls, and floor slabs. In any room where aesthetics are not an issue, such as an unfinished basement, mechanical room or garage, steel conduit is a good choice to enclose exposed wiring. Works are carried out basing on construction schedule and detailed shop drawings approved.ExclusionInstallation of the embedded conduitsGeneralProgram (Working period: 5-May-2015 ~ 4-April-2016)NoTaskWorking timeThe number of labor

1Prepared tools and materialsAM 07:30 ~PM 05:30-

2Marking / Label all lighting, power point outlets as per dimension / setting out shown in the approved drawing plan layouts2 person

3Locate the boxes (wall, slab, and ceiling), and fix box to the marked position12 person

4Cut, thread, and bend the steel conduit as shown in section 3.2.10 and 3.2.114 person

5Connect the boxes to designated conduits as shown in detail 02 08 in section 3.220 person

6Self-checking, the fixed boxes, the connected conduits, the boxes, conduits connection and route, check final installed positions all conduit boxes, conduit routing and connections5 person

7Make sure there is no conflict of works to other subcontractor-

Location - AddressThroughout the Exchange Square 106 street project, the exposed boxes and conduits will be installed at every floor, wall and slab.ApprovalsMaterial of submission : PSC-HK-MAT-ELC-003-Rev0 (Approved, ..-..-2015)Shop drawing : Lighting, small power, cable containment and exposed conduit in B3 column and ceiling : PSC-HK-SD-ELC-002-Rev07 (Waiting Approval)Labor resources

CommunicationsThe means of communication between work areas with office mobile phone or walkie-talkie. Site Resources RequiredLocal power suppliesArea clearance obtained from other discipline/ main contractor.Temporary materialsCable leads 20m/2 sets will be connected from construction temporary panel for AC 220V powersupply for power tools and lighting.ProtectionProtect the threads of steel conduits on the uncoupled end by the thread protectors which keep them clean and sharp and aid in trade size recognition.Deliver component parts to site, completely identified in accordance with approved shop drawings prepared for this work. Store in accordance with manufacturer's instructions, above ground, properly protected from the weather and construction activities.Equipment/ToolsThe equipments that will be engaged for surface steel conduits works will be as follows:Cutting plierThreading machineBenderPipe WrenchDrilling MachineRound filesBox spanner setThreading machine

Cutting plier

Pipe wrench

Bender

Drilling machine

Round file

Box spanner set

Hot worksNot applicableConfine space worksNot applicableEmergency & Safety EquipmentSafety Helmet (4ea) Safety Shoes (4ea) Safety Vests (2ea)

Hand Gloves (4ea) Safety Goggles (2ea)

Fire extinguisher

. .

Materials required for installationSteel Conduit: 20D 500m, 25D 200m, 32D 100mFlexible Metallic Conduit: 20D 1,000m, 25D 800mCircular Surface Box 1 Outlet: 200 EACircular Surface Box Straight/angle 2 Outlets: 500 EACircular Surface Box Vertical/angle 2 Outlets: 300 EACircular Surface Box 3 Outlets: 200 EACircular Surface Box 4 Outlets: 100 EAInspection Threaded Elbow: 200 EAInspection Threaded Tee: 100 EAPipe hanger and saddle: 2,000EA

Schedule of drawingsBasement structure work : ~ 21. 07. 2015Podium structure work : 28. 08. 2015 ~ 23. 11. 2015Tower structure work : 28. 08. 2015 ~ 26. 04. 2016

Schedule of inspections/T&C form Refer to ITP sample attached (3.10).AttendeesSub-contractor manager : Seo Sung Won (099-580-959)Sub-contractor site manager : Noun Vandyca (070-240-702)Contractor manager : Park Sang Min (097-806-3610)HKL M&E manager : Tran Huu Phuoc (012-833-209)Safety BriefingThe contents of this method statement shall form the basis of a toolbox talk for all operatives before the commencement of such works.Mitigation of RiskRisk AssessmentTheft, ensure security staffs are aware steel materials installed and maintain surveillance while exposed to eliminate risk of theft.Incorrect connections or materials, ensure the final installation and connections are inspected and signed off with photographic records by senior on site M&E staff from contractor, architect, client.Damage of exposed conduits during rebar installation and concrete casting mitigated by full time designated inspectors observing builders works.Actual Works Method StatementVisual Inspection Supervisor to carry out a visual inspection of the work areas, materials, tools, safety equipment and confirm ready to commence works.InstallationPrepare tools and materials such as steel conduit, flexible metallic conduit, circular surface box, inspection threaded elbow/tee, single switch box, pipe hanger/supports, accessories, bender and hand tools etc.Steel conduits shall conform to BS 31-1940 and BS 4568-1970 standard.Conduit boxes will be installed at the positions as defined on the shop drawing to accommodate all the light switches, power outlets, lighting points and ELV equipment. Conduit boxes will be connected with appropriate sized conduits. The routing of the conduits that be exposed shall be according to approved shop drawings.After finishing the concrete /brick wall, mark the conduit routing as per approved shop drawing.Install the Steel and Flexible steel conduit in straight runs and without any diagonal layout.The exposed conduits shall be held in the right position by using the saddles which are installed directly to the concrete/brick wall.Distance between two saddles shall be followed as shown on Table-1.

Conduit sizeMaximum distance between saddles

201.2 m

251.5 m

321.8 m

Maximum distance from saddles to boxes : 0.3 m

Maximum distance from tangential line to saddles : 0.3 m

Standard of saddle spacing (Ref: BS 31)Table-1The maximum permissible length of the metallic flexible conduit used for the connection to the fixture unit should not exceed 2000mm (see detail 03).Install straps or other means of securing the conduit in place is spaced much closer together (every 1500mm and within 300mm. of each end) for flexible conduit than is necessary for rigid conduit (see detail 01). To provide flexible conduit for exposed conduit installation where have the expansion joints, joint for fixtures, and equipments (see Detail-01 to Detail-05).Always lay the exposed steel conduits parallel or perpendicular to walls and structural members.Minimize the number of bends in any single conduit run. Follow minimum bend radius requirement.Bushings, locknuts, couplings, connectors are made up tight to ensure good continuity. Use double locknuts when insulating bushing is used.Install boxes with a separate supports.

Install pull wires in all empty conduits.Check boxes are covered after installation.

Detail-01Exposed conduit installation with expansion joint and beam

Detail-01Exposed conduit installation with expansion joint and beam

Detail-02Exposed conduit installation for surface mounting boxes

Detail-03 Detail for joint embedded conduit and exposed conduit above ceiling.

Detail-04 Detail for exposed steel conduit installation.

Detail-05 Detail for exposed conduits joint to Motor.Steel conduit threading work1 2

3 4 5 6 7 8

9 10

11 12

13

Steel conduit bending1 2

3 4

5 6

Air TestsNot ApplicableWater TestsNot ApplicableFlow TestsNot ApplicableElectrical TestsNot ApplicableSetting to workNot ApplicableTest RecordsNot ApplicableT&C RegisterNot ApplicableReports

AppendixShop Drawing number PSC-HK-SD-ELC-002-Rev2 (Waiting Approval)

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