Phembumuzi primary school, kwazulu-natal: construction of new sanitation infrastructure and associated external works (CIDB 5gb or higher)

Pricing submission

• The bill of quantities must be priced in the format supplied, with a rate and amount entered against every measured item and provisional section.
• Sections marked provisional (earthworks, concrete/formwork/reinforcement, reinforcement, plumbing and drainage) must still be priced.
• No unpriced item may be left in the schedule.

No submission channel, delivery address, returnable-form list or closing arrangements are set out in the available document text.

Scope

• New sanitation infrastructure and associated external works at Phembumuzi Primary School, with alterations to the existing ablution facilities.
• Contract period: 10 calendar months.

Alterations and demolition

• Demolish and remove one single-storey building, 13 m x 4.5 m on plan and 3 m to eaves, with concrete surface bed, brick external and internal walls and sheet steel roof on timber trusses.
• Remove internal sanitary fittings and desludge and decommission the existing ablution blocks.
• Break up and set aside the existing concrete surface bed for re-use as fill: 15 m³.
• Fill existing toilet pits with G7 material in 200 mm layers compacted to 93% Mod AASHTO: 116 m³.
• Old materials become the contractor's property and a credit must be reflected in the final summary; rubble must be cleared from site regularly.
• Materials designated for handing over must be stored and receipted; failure to produce the receipt makes the contractor liable for full replacement value, deducted from amounts due.

Temporary works

• 70% green shade cloth screen, 2 000 mm high, including posts: 385 m.
• Temporary double swing gates, 5 000 mm x 2 400 mm: 2.
• Hire of 2 chemical mobile toilets, including transport, establishment and removal, for 11 calendar months.

Earthworks

• Strip and stockpile 100 mm topsoil: 110 m².
• Excavation in earth: raft foundation 14 m³; holes/pits 144 m³; reduced levels under floors 1 m³.
• Excavation in soft rock 17 m³ and hard rock 47 m³.
• Cart surplus material to a dumping site located by the contractor: 124 m³.
• Earth filling compacted to 93% Mod AASHTO: 83 m³ backfilling to trenches and holes; G5 filling 26 m³ under floors and 39 m³ to pit sides; river sand 3 m³.
• Compaction of ground surface under floors to 95% Mod AASHTO: 138 m².
• Density testing: 28 Mod AASHTO tests and 28 field density tests including optimum moisture content.
• Soil insecticide under floors 83 m² and to trench bottoms and sides 131 m².
• Ground conditions assumed to be earth, possibly interspersed with soft or hard rock; trial holes indicate silty clay to about 500 mm with loose sand below and the water table at about 1 000 mm. A soils investigation report is annexed to the bills.

Concrete, formwork and reinforcement

• 15 MPa/20 mm blinding: 1 m³.
• 25 MPa/20 mm concrete: raft foundation 14 m³, bases 6 m³, ramps and aprons 2 m³.
• Smooth formwork: raft sides 36 m², suspended slabs 29 m², beam sides and soffits 6 m², edges and risers 53 m.
• High tensile reinforcement 3 t; type 245 fabric reinforcement 86 m².
• Concrete test cubes: 4 sets of six 150 mm cubes, tested by an independent laboratory approved by the architect.
• Saw-cut movement joints 10 m; isolation joints 28 m and 6 m².

Precast concrete

• Precast pit latrine access panels, 100 mm thick, with concealed keyholes: 2 020 x 375 mm (2), 1 295 x 375 mm (2), 1 025 x 375 mm (2), 1 100 x 375 mm (2), 1 040 x 375 mm (8).

Masonry

• Foundation brickwork in NFX bricks (14 MPa) class 1 mortar: one brick wall to pits 86 m², half brick walls 4 m², piers 2 m³.
• Superstructure in NFP bricks class II mortar: one brick walls 133 m², half brick walls 23 m², beamfilling 5 m², piers 4 m³.
• Corobrick Firelight Satin FBX facebrick with 6 mm square recessed joints: 123 m², plus beamfilling 5 m², cills 6 m, soldier course heads 16 m and bands 7 m.
• Brickwork reinforcement: 75 mm wide 135 m and 150 mm wide 1 820 m.
• Prestressed concrete lintels 16 m and 49 m.
• Masonry samples: minimum 6 units of each type.

Waterproofing

• Damp proof course in walls 21 m².
• 250 micron waterproof sheeting: raft 74 m² and pit base slab 33 m².
• Pit linings: floors 32 m², external pit walls 53 m², internal pit walls 84 m², pit slab 32 m², using the specified Sika systems.
• Bitumen emulsion coating to bagged brick walls 98 m².
• Sealant to aluminium windows 41 m and to floor joints 14 m, 40 m and 6 m.

Roof

• Safintra 0.50 mm Widedek AZ150 pre-painted sheeting on 75 x 50 mm pine purlins at 1 200 mm centres: 71 m².
• Ridge capping 10 m, cover flashing 20 m, purpose-made ridge end tiles 4, pipe flashings 8, filler blocks 35 m.
• Sisalation 420 foil insulation 68 m² and Sondor eave polycloser 42 m.

Carpentry and joinery

• Monoplaner prefabricated connector-plate roof trusses at 1 600 mm maximum centres, 25 degree pitch, 5 100 mm span x 1 100 mm high with 450 mm overhangs: 11.
• Wall plates 31 m, bracing 35 m, purlins 84 m, 45 x 145 mm treated beams 10 m, hurricane clips 176.
• TR1 and TR2 certification of all trusses must be allowed for.
• Barge boards 13 m and fascia boards 21 m.
• Doors: 6 solid core 813 x 2 032 mm and 3 hardwood 813 x 2 032 mm; 9 rebated timber frames.

Ironmongery and metalwork

• Brass butt hinges 11 pairs; Union locks 3 and 6; indicator bolts 9; grab rails and back rails; toilet roll holders 8; hat and coat hooks 9; door stops 9; door signs 11.
• Hot dip galvanised steel windows: 8 at 533 x 654 mm and 2 at 899 x 457 mm, including glass, ironmongery, fixing and sealing.
• Burglar bars to match both window sizes: 8 and 2.
• Pressed steel door frames 9; galvanised steel posts 3; galvanised channel 5 m and 5 m; galvanised single gates 2.

Plastering and plumbing

• Screeds 30 mm thick: 47 m² on floors and 33 m² on pit base slabs.
• Cement plaster: 185 m² internal superstructure walls, 99 m² pit walls, 3 m² in narrow widths.
• uPVC rainwater goods: 21 m half-round gutter, 14 m of 80 mm downpipe and associated bends, shoes and outlets.
• Sanitary fittings: 8 Atlas VIP toilets and 6 Atlas Viking handwash basins.
• Pipework: 40 mm 18 m, 50 mm 18 m, 110 mm 65 m, 110 mm stub stacks 7 m; class 2 copper 20 mm 35 m and 15 mm 23 m; taps, stopcocks and traps as scheduled.

Pricing format

• Bill of quantities with rates and amounts per item; provisional sections must be priced.
• Old materials from the alterations accrue to the contractor and a credit must be shown in the final summary.

Payment conditions

• A desludging certificate must be submitted before payment is released for the demolition of the toilets.
• Where handed-over materials cannot be evidenced by an official receipt, their full replacement value is deducted from monies due to the contractor.

No bid security, guarantee, retention percentage, payment period or turnover threshold is stated in the available document text.

Eligibility

• CIDB grading: 5GB or higher.
• Contract period: 10 calendar months.

Technical compliance

• Roof trusses must be designed, supplied and erected to SANS 10160 wind loading and covered by TR1 and TR2 certification.
• Concrete cube testing by an independent firm or institution nominated by the contractor and approved by the architect.
• Masonry, stonework and paving materials to the specified SABS standards, with samples submitted for approval.
• Compliance with the Model Preambles for Trades (2008 Edition) and the Standard System of Measuring Building Work.

No CSD, tax, B-BBEE or CIPC requirements are set out in the available document text.