1.0 GENERALLY
1.1 Contractor shall ensure partitions to be used shall comply with the relevant requirement of the Standards and Codes listed or referenced in the body of the Specification .
1.2 Standards
Singapore Standards
SS CP1 The use of timber in building construction
SS 72 Treatment of timber and plywood with copper / chrome / arsenic / wood preservative
Other Standards
BS EN 10143 Specification for continuously hot-dip, metal coated steel sheet and strip.
BS.1230: Part 1 Specification for plasterboard excluding materials submitted to
secondary operation.
BS 5234: 1 & 2 Partitions. (including matching linings)
BS 5588 Fire precautions in the design construction and use of Building
Code of Practice for shop, offices, industrial and storage buildings.
BS 7364 Galvanised steel studs and channels for stud and sheet
partitions and linings using screw fixed plasterboard.
BS 8212 Code of practice for dry lining and partitioning using Gypsum plaster board.
AS 1604 Specification for preservative treatment- sawn and round timber.
1.3. Contractor shall allow for all necessary cutting to accommodate for corner joint, including all necessary stainless steel fixing accessories to SO.’s approval.
1.4. Contractor shall ensure specified fabrication tolerances must be observed at all times and fabricate in accordance with approved shop drawings. He shall provide all information necessary to secure work in place if necessary.
1.5. Contractor shall include everything necessary or incidental to the execution and completion of all partitions as specified herein, shown on the drawings or as may be directed on site by the SO.
1.6. Contractor shall ensure all fully framed polyester powder coated extruded aluminium with perimeter head stabilizing section and continuous side fixing channels. Extruded aluminium hollow section head75mm X 50mm mechanically joined to 50mm diameter vertical posts with screw spline connections to form structural framework. Corners joined to head section and formed with solid aluminium castings. Framework to form the main support for the cubicles without reliance on panel media or path fittings. 1.7 Contractor shall ensure mild steel studs comply with BS 7364. Studs to incorporate
2.0 PERFORMANCE REQUIREMENTS
2.1 Structural Criteria
Drywall partition supplier shall erect to comply partitions strength as set out in BS 5234-2 : 1992. and determination of the effects of door slamming set out in BS 5234- 2 :1992. Where the wall acts as a protective barrier take into consideration the BCA’s impact and lateral loading requirements.
2.2 Dead Loads
The self-weight and other associated dead loads of the complete partition system shall be supported and transferred to the main building structure.
2.3 Fire resistance
The partition system and components shall comply, as a minimum, with the requirements of the FSSD and any additional requirements of other Statutory authorities having jurisdiction over the works.
2.4 Fire integrity
Drywall partition supplier shall conform to FSSD requirement. 2.4 Impact Resistance Plasterboard
a) Plasterboard to comply with BS 1230: Part 1, type 1 to 5 with exposed surface and edge profiles suitable to receive the specified finish.
b) To comply with BS1230: part 1, types1/5 with high density core not less than 925 Kg/ m3 and heavy duty paper facings.
2.5 Moisture Resistant Plasterboard
To comply with BS 1230: Part 1, type 3 and 4 with moisture resistant core and moisture vapour resistance of backing layer not less than 60 MNs/g.
2.6 Acoustic Treatment
Contractor shall ensure that acoustic sealant used must comply to the board manufacturer requirement and shall apply to perimeter junctions with walls, floors, ceilings and around openings and other potential air leakage points including frame members prior to fitting core boards and around fire stops to horizontal joints.
3.0 CONSTRUCTION DETAILING
3.1 Beading / stops
Contractor shall ensure that rigid bead / stops comply with the manufacturer’s requirement. Material used shall be galvanized steel.
3.2 Cavity barriers
Contractor shall ensure cavity barriers shall be enveloped with mineral fibre. 3.3 Studs
Contractor shall ensure set out floor / head channels and perimeter studs to give a framework which is accurately aligned with a true vertical plane. Fix securely at all perimeters at not more than 600mm centres. Position studs at equal centres to suit specific linings, maintaining sequence across openings. Provide additional studs as necessary to ensure support to all vertical edges of boards.
a) Contractor shall provide accurately positioned and securely fixed framing to receive partition heads running parallel with but offset from main structural supports.
b) Contractor shall provide accurately positioned and securely fixed framing to support fixture, fittings and services. After fixing boards, mark positions of framing for following trade.
c) Contractor shall provide additional framing, accurately positioned and securely fixed, to give full support to board edges and lining perimeters in accordance with board manufacturer’s recommendation.
3.5 Partition and compartment panels
a) Contractor shall ensure partition panel shall be attached to floor and soffit of slab. b) Contractor shall ensure installation of the compartments shall be executed in strict compliance with the manufacturer’s recommendation and shall clean and protect the partitions and compartments to the satisfaction of the S.O. till hand over.
c) Contractor shall co-ordinate the partition works with all interfacing work packages and trades to ensure correct setting out and positioning.
d) Contractor is to ensure exposed edges of panels and doors shall be chamfered safely. Edges shall be in stainless steel.
3.6 Colour
Colour of drywall partition to be approved by S.O.
4.0 SAMPLES AND SHOP-DRAWINGS
4.1 Contractor shall ensure sample of compartments shall be submitted free of cost and fixed at the Location as directed by the S.O. for approval. All materials subsequently delivered to site shall be equal to the approved samples.
4.2 Contractor shall submit shop drawings showing all details of construction, assembly, erection and anchorage for approval by the S.O.
SPECIFICATION FOR EXTERNAL WORKS
FLOW CHART FOR CONSTRUCTION OF SCHOOL FIELD
PROPOSED UPGRADING WORKS FOR ST STEPHEN'S SCHOOL
Construction of Earthwork / Drains / Sub-soil drainage / Fencing
Inspection by SO / RE / RTO
Site supervison by RE / RTO
Handover Inspection by SO / RE / RTO / FM (Assessment details refer to Annex 4)
Inspection by Site Procession Supply and
Planting Turf (Min 3 inspections)
SO / RE / RTO / FM GROWING PERIOD
MIN. 3 MONTHS MAINTENANCE PERIOD (Checklist refer to Annex 3) CONSTRUCTION PERIOD
(Checklist refer to Annex 2)
ANNEX 1
1 MONTH FIRST 2 MONTHS OF