-4-1- SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT NKANGALA DISTRICT MUNICIPALITY CONSTRUCTION OF SAKHELWE COMMUNITY HALL – EMAKHAZENI LOCAL MUNICIPALITY PROJECT NO: 34415 DETAILED DESIGN REPORT CIVIL AND STRUCTURAL OCTOBER 2016 PREPARED BY: PREPARED FOR: Seroadime Consulting Engineers Nkangala District Municipality Box 783056 Box 437 Sandton Middelburg 2146 1050 Tel: (078) 272 8407 Tel: (013) 249 2000 Fax: (086) 528 6392 Fax: (013) 249 2145 Email: [email protected]
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
NKANGALA DISTRICT MUNICIPALITY
CONSTRUCTION OF SAKHELWE COMMUNITY HALL –
EMAKHAZENI LOCAL MUNICIPALITY
PROJECT NO: 34415
DETAILED DESIGN REPORT
CIVIL AND STRUCTURAL
OCTOBER 2016
PREPARED BY: PREPARED FOR:
Seroadime Consulting Engineers Nkangala District Municipality
The project entails the development of the proposed new community hall at Sakhelwe in
Dullstroom, Mpumalanga province. The site is located within Sakhelwe township in
Dullstroom. The image below shows the locality Map of the site.
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
Image 1: Locality Map
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
1.2 Terms of Reference
Seroadime Consulting Engineers has been appointed by Nkangala District Municipality as the
Civils and Structural Engineers for the provision of professional services with regards to this
development
The purpose of this report is provide the final design output for the following:
1.2.1 Design criteria and standards for the design of water supply, sewerage and stormwater
to the proposed development.
1.2.2 Connection to existing and proposed bulk services including the demand on those
services.
1.2.3 The layout, size and capacity of internal services and the construction methods and
materials.
1.2.4 Design criteria and standards for the design of structural components to the proposed
development
1.3 Scope of Work
The scope of Civil Engineering comprises of the design and specification of:
Access road, parking and storm water infrastructure
Potable water supply to the facility
Sewer reticulation and connection to existing outfall sewer line.
The scope of Structural Engineering comprises of the design and detailing of:
The foundations and ground preparations under the foundations
The support elements which include concrete columns, brick walls and columns,
steel columns
The Roofs and all the structures for the support of roof covering which include steel
beams and trusses, concrete beams and slabs as well as timber trusses
The above work includes the preparation of tender drawings, and the preparation of
construction drawings, and construction monitoring. The scope of work for civil and structural
engineering covers the entire scope of work as defined by the Engineering Council of South
Africa. The work include facilitating the Geotechnical Investigation and Topographical survey.
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
1.4 Design Approach
The civil and structural Engineering infrastructure has been designed to support and achieve
the effect as specified in the Architectural Drawings.
Coordination has been done with other services such as electrical, mechanical and wet
services to avoid clashes on positioning of underground services on site.
The designs have been carried out in the following stages:
Serviceability Limit State
a) Deflection check
b) Fire resistance
c) Crack control
Ultimate Limit State
a) Flexural failure check
b) Compression resistance
c) Tensile resistance
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
NKANGALA DISTRICT MUNICIPALITY
NEW SAKHELWE COMMUNITY HALL
DETAIL DESIGN REPORT
SECTION 2: Project Description
2.0 DESCRIPTION OF THE PROJECT
The project comprises of the following:
a. Construction of new 432-capacity community hall
b. Construction of a new guard house
2.1 The Proposed New Community Hall
The new community hall structure comprises of a ground floor, structural steel columns built
in brickwork, steel trusses and a kliplock roof sheeting.
Ablutions, change rooms, canteen are outside buildings attached to the main building. These
structures will have timber roof trusses
2.2 The proposed New Guard House
The new guard house structure comprises of a ground floor, brickwork walls, timber trusses
and a kliplock roof sheeting.
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
2.3 Available Information The following information has been made available by both the client and other members of
the professional team.
2.3.1 The Proposed New Building
Information for the new or proposed building comprises of the following:
a) Architectural, Electrical Engineering, Mechanical Engineering and Civil Engineering
Drawings.
b) Topographical Survey report and drawing
2.3.2 Details of External Façade The details of the external façade on the new buildings is brick cladding.
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
NKANGALA DISTRICT MUNICIPALITY
NEW SAKHELWE COMMUNITY HALL
DETAIL DESIGN REPORT
SECTION 3: DESIGN
3.0 STRUTURAL ENGINEERING DESIGN
The purpose of structural engineering is to design and so arrange the structural elements that all the
loads that are supported by or imposed on the structure are safely transmitted to competent
foundations and then to the ground.
3.1 Design Codes of Practice
Structural design has been carried out in accordance with the South African National Standards (SANS) as published by the South African Bureau of Standards (SABS). The following codes of practice have been used:
Table 3.1: Design Codes
Material/Element Code Description
Concrete SANS 10100 -1:
The Structural Use of Concrete, Part 1: Design
SANS 10100 – 2:
The Structural Use of Concrete, Part 2: Materials and Execution of Work.
Steel
SANS 10162 – 1,
Structural Use of Steel Part 1: Limit State Design of Hot-Rolled steelwork
SANS 10162 – 2,
The Structural Use of Steel Part 2: Limit State Design of Cold Formed steelwork
Basis of Structural Design and actions for buildings and industrial structures Part 1 to 8.
Timber
SANS 10163-1: The Structural use of Timber, Part 1: Limited State Design.
Masonry
SANS 10164-1 The Structural use of Masonry, Part 1: Unreinforced Masonry Walling.
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
3.2 Loading
The imposed gravity loading for the new community hall building are as follows:
Occupancy
Design Load
(KN/m²)
(a) Offices 3.0
(b) Common Areas* 5.0
(c) Roof 0.5
*Note that the building is a single storey structure. The loads on the floors are generally loads on the ground, which can also be classified as surcharge Lateral loading consists of wind loading for the design wind speeds associated with the
location of the building.
Wind Data: The fundamental value of the basic wind speed is 40m/s (10 min mean wind
speed) as defined in SANS 10160-3: 2011 shall be used.
Terrain Category: The applicable category is Terrain Category C (i.e. an open area without
regular cover of buildings)
Site altitude: For the Dullstroom/Mpumalanga Area the altitude above sea level is 2037 m
The area is not known to be prone to seismic activity. Accordingly no seismic loading been considered.
3.3 The New Community Hall Building
The design loads for the building is shown on the drawings in appendix A.
The proposed building has been designed as a structural steel framed structure comprising of
reinforced concrete footings, steel columns, and steel roof trusses.
Gravity loads will be taken by the steel trusses and transferred to the columns. These vertical
members will transmit the loads to the foundations and the foundations will take the loads into
the ground.
Lateral loads, in the form of wind loads will be taken in by the cladding and transferred to the
frame as horizontal loads.
The frame has been designed to carry any lateral loads.
3.4.1 Trusses The roof trusses comprise of steel trusses. The steel trusses consist of 1500mm deep parallel
truss with top chord, bottom chord and cross members. Generally the members are angle
sections.
The whole truss system is designed to deflect within allowable limits of deflection. Individual
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
members of the truss are designed to resist tensile and compressive forces accordingly.
Furthermore, the individual members are checked for slenderness adequacy, so that they do
not buckle under the applied loads.
Bracing members have been provided to provide lateral stability of the structure.
Sag rods have been provided to provide stability to the purlins by preventing twisting of such
members
3.4.2 Columns Columns have generally been designed as unbraced non-slender columns. The columns are
generally 254x146x23 I - sections. These columns are built within brickwork.
The columns are connected to the footings with a base plate and holding down bolts. Holding
down bolts will be cast within the concrete.
3.4.3 Walls
230mm brickwalls, as shown on the drawings will be built as facade. Most of this brickwork is non-load bearing brickwork. The brickwork for the external structures and the guard house are load-bearing brickwork. All 110mm thick brickwork is non-load bearing brickwork Expansion joints in brickwork to be provided at every third steel column 3.4.4 Foundations
From the geotechnical report, the area is not within dolomitic area. The specific area is
underlain with gravely soil with some few rock outcrops. The foundation recommended is Pad
footings for columns and strip footings for brickwalls. The minimum soil bearing capacity of
200 MPa has been specified.
3.5 Design Documentation
Design documentation consists of drawings and engineering calculations.
The drawings, contained in Appendix B, consists of the following:
a) Architectural Layouts
b) Setting out drawings
c) Concrete Layouts and details
d) Steel layouts and details.
The calculations of the structural elements have been included in Appendix C.
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
NKANGALA DISTRICT MUNICIPALITY
NEW SAKHELWE COMMUNITY HALL
DETAIL DESIGN REPORT
SECTION 4: RECOMMENDATIONS
From the designs, it is found that a durable, cost effective structure can be built.
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SAKHELWE COMMUNITY HALL DETAILED DESIGN REPORT
NKANGALA DISTRICT MUNICIPALITY
NEW SAKHELWE COMMUNITY HALL
DETAIL DESIGN REPORT
SECTION 5: CONCLUSION
The project is feasible from a civil and structural engineering point of view. More attention to
be paid on implementation and construction monitoring, to ensure that the project is executed