Hydraulic ram pumps and Sling Pumps

6% clay, silt, etc. Before commencing work, the quality of the sand shall be proven by test, andsubmitted to the Clerk of Works. After the float-frushed screed has been watered for 24 hours, thenil coat shall be applied, using a steel trowel.Waterproof PlasterThree-Coat PlasterFirst Coat: 10 -15 mm cement plaster of one part cement and three parts river sand screenedthrough a 3-mm sieve screen shall be wooden-float-finished.Second Coat: 5 -8 mm cement plaster mixture, as described in First Coat above, shall be screenedthrough a 1.5-mm sieve screen.Third Coat: This shall be a nil coat composed of pure cement with a consistency of water, and shallbe steel-trowel-finished. The plaster shall be cured after each coat has been applied, and when thethird (nil) coat has been applied, it shall be covered with waterproof material or soaked thoroughlyfor seven days.Bill of QuantitiesQuantity UnitRate AmountEarth: Excavate oversite average 100 mm deep to remove vegetable soil, remove, m²and deposit according to Employer's advice, not exceeding 50 mEarth: Excavate foundation trench to 'Barth' not exceeding 0.50 m deep and remove, m³part-return, fill in and ram around foundationEarth: Additional excavations for trenches to reach stable ground m³Earth: Additional excavation for inner circle to reach stable ground m³Earth: Backfilling and ramming of hardcore approved material in layers not exceeding m³200 mmEarth: Lean concrete for backfilling: 1 part cement: 2 parts river sand: 4 parts gravel m³Reinforcement: Supply and place reinforcement cage for ring foundation and weldedreinforcement mesh for bottom slab consisting ofMild steel rods Ø 20 m²Mild steel rods Ø8mWelded reinforcement meshmConcrete: 1 :2 :1 -20-mm aggregate as specified in ring foundation and slab m³compacting by mechanical vibratorReinforced Brickwork: 240-mm brick wall in cross bond reinforced vertically by10-mm mild steel rods and horizontally by 6-mm mild steel rodsBrick wall m²Mild steel rods Ø10mMild steel rods Ø6mWaterproof cement plaster consisting of 3 coats as specified, inclusive curing m²Concrete Slab Seating: Plaster of the wall top steel-trowel-finished and placing of 2layers plastic sheeting to provide for sliding joint under roof slabReinforcement of Roof Slab: Supply and place mild steel reinforcement cage for rooflintel and welded reinforcement mesh for roof slab consisting ofMild steel rods Ø6mMild steel rods Ø20mWelded mesh m²Formwork and Concreting Roof Slab: Concrete 1: 2: 1 as specified compacting by m²mechanical vibratorSupply and place water tap unit according to drawing 1 NºSupply and place overflow 150 mm Øasbestos pipe of 800 mm length provided with 1 Nºgalvanized gauze wire coverSupply and place manhole cover 600/450 mm cast iron painted 3 times with 1 Nº73