Konfoor combined school: construction of new sanitation and associated external works (CIDB 5gb or higher)

Closing: 3 December 2026 at 11:00.

Contract period: 10 calendar months.

Temporary toilet hire: priced for the full 10 calendar months.

Qualification

• CIDB contractor grading: 5GB or higher.
• No functionality scoring, preference point formula or minimum qualifying score is set out in the bill of quantities.

Priced offer

• The bill of quantities is the pricing document; every item carries a rate and amount column that must be completed and totalled per bill and in the final summary.

Scope

• Construction of new sanitation facilities, including associated external works, at Konfoor Combined School, with demolition and replacement of the existing ablution blocks.
• Contract period: 10 calendar months.

Section 2 — Alterations

• Demolish and remove 4 existing single-storey ablution blocks, each approximately 3.74 m x 5.00 m on plan with a 3 m eaves height, including removal of internal sanitary fittings, desludging and decommissioning.
• Break up and set aside the existing concrete surface bed: 8 m³.
• Fill the existing toilet pits: 8 m³ surplus demolition material plus 98 m³ of G7 material placed in 200 mm layers compacted to 93% Mod. AASHTO.
• Desludging certificate: must be provided before the demolition of the toilets is paid for.
• Remove 4 trees with girth over 500 mm and up to 1 000 mm, including stumps and roots.
• Remove 10 m of existing fence during construction and reinstate it afterwards.

Temporary works

• 297 m of 2 000 mm high temporary shade cloth screen (70% green) including posts.
• One temporary double swing construction gate, 5 000 mm wide x 2 400 mm high.
• Hire of 6 chemical mobile toilets, including transport, establishment and de-establishment, for 10 calendar months.

Section 3 — Prototype 1A-R

• Site clearance: strip an average 100 mm of topsoil over 84 m² and stockpile on site.
• Excavation: 90 m³ pits, 10 m³ raft foundation, 1 m³ reduced levels under floors; 11 m³ soft rock and 40 m³ hard rock measured as extra over.
• Cart away 75 m³ of surplus material to a dumping site located by the contractor.
• Filling and compaction to 93% and 95% Mod. AASHTO; 14 Mod. AASHTO density tests and 14 field density tests including optimum moisture content.
• Soil poisoning under floors (66 m²) and to trench bottoms and sides (88 m²).
• Concrete: 15 MPa/20 mm blinding; 25 MPa/20 mm raft foundation 11 m³, bases 4 m³, ramps and aprons 2 m³; high tensile reinforcement 1.61 t; type 245 fabric 61 m².
• Precast concrete pit latrine access panels in four sizes (1 100 x 375, 1 120 x 375, 1 300 x 375 and 2 080 x 375 mm, all 100 mm thick), 2 of each.
• Masonry: NFX brick foundations and one-brick pit walls (52 m²); NFP brick superstructure with one-brick walls 104 m²; Corobrick Firelight Satin FBX face brick with 6 mm square recessed joints, 83 m² plus cills, soldier courses and beamfilling.
• Waterproofing: 375 micron DPC, 250 micron Gunplas sheeting to raft and pit base, Sikafloor-156 and Sikagard-63 N pit lining system, Sika Cemflex to external pit walls, Sikagard 720 EPOCEM and Brixeal bitumen emulsion.
• Roof: Safintra 0.50 mm Widedek AZ150 G550 pre-painted sheeting, 39 m² at pitches up to 50°, on 75 x 50 mm pine purlins at 1 200 mm centres; Sisalation 420 insulation 39 m².
• Roof trusses: Monoplaner prefabricated connector-plate trusses at maximum 1 600 mm centres, 25° pitch, 5 100 mm span x 1 100 mm high with 450 mm overhangs, 5 off; design to SANS 10160 wind category; TR1 and TR2 certification of all trusses required.
• Doors: 4 solid core doors 813 x 2 032 mm, 2 TDM hardwood doors, 4 meranti doors 813 x 1 026 mm, with timber frames.
• Ironmongery: Union locks, brass butt hinges, stainless steel grab rails and flush-valve back rail, toilet roll holders, hat and coat hooks, door stops, and signage including a paraplegic sign and female sign.
• Metalwork: hot dip galvanised steel windows (4 at 533 x 654 mm, 1 at 899 x 457 mm) with glass and ironmongery; matching burglar bars; pressed steel door frames; galvanised steel posts, channels and 2 single gates 877 mm x 2 225 mm.
• Plastering: 30 mm screeds to floors and pit base slab; cement plaster to internal walls 84 m² and pit walls 44 m².
• Plumbing and drainage: uPVC half-round gutters 12 m and 80 mm rainwater pipes 14 m; 4 Atlas VIP toilets with inlet funnels; 3 Atlas Viking handwash basins; pillar taps and stopcocks; uPVC pipework in 40 mm, 50 mm and 110 mm with fittings.

Ground conditions

• Trial holes indicate silty clay to about 500 mm with loose fine to medium sand below; water table at a maximum depth of about 1 000 mm.
• A soils investigation report by the engineer is annexed to the bills of quantities and governs the classification of excavation.

Pricing

• The bill of quantities must be priced item by item, with rates and amounts extended per bill and summarised in the final summary.
• Several bills are marked provisional (earthworks, concrete, reinforcement, plumbing and drainage) and concrete cube testing is a provisional set of 3.
• The 10-month hire period for the temporary chemical toilets must be priced into that item.

Payment-linked conditions

• Payment for demolition of the toilets is withheld until the desludging certificate is provided.
• Old materials from the alterations, other than those designated for re-use or hand-over, become the contractor's property and a credit must be allowed for them in the final summary.
• Materials designated for hand-over must be stored and receipted; without the receipt the contractor remains liable for their full replacement value, deducted from monies due.
• No bid security, performance guarantee, retention percentage or payment term is stated in the bill of quantities.

Eligibility

• CIDB contractor grading designation: 5GB or higher.
• No CSD, tax, B-BBEE, CIPC or professional registration requirement is stated in the bill of quantities.

Standards and certification

• Work is executed under the Model Preambles for Trades (2008 Edition) and the Standard System of Measuring Building Work.
• Concrete testing to SABS 1200 G by an independent laboratory nominated by the contractor and approved by the architect.
• Concrete masonry units to SABS 1215 and blockwork to SABS 0145.
• Roof trusses designed to SANS 10160 with TR1 and TR2 certification.
• Taps manufactured to SANS 226:2004 Type 2.
• Masonry samples: minimum 6 units of each building unit for approval.