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(1) . TEST FOR SILT & CLAY :-
- Take 200 ml measuring cylinder fill sand up to 100 ml mark
- Add 150 ml of water and shake well
- Allow it to settle for 3 hrs.
- Measure the total height and height of clay.
- Calculate the clay and silt in total sand
- Clay and Silt should not exceed 3% by weight (or) 8-10% by volume
- For crushed sand Clay and Silt should not exceed 15% by weight
(2) . QUANTITIES REQUIRED :-
- Brick work (CM 1:5) = 86 Kg / 10 m3
- Brick work (CM 1:6) 9” thick = 80.64 Kg / 10 m3
- Brick work (CM 1:3) 4½” thick = 15.46 Kg / 10 m3
- Plastering (CM 1:3) = 1.50 bags / 10 m2
- Plastering (CM 1:5) = 1.05 bags / 10 m2
- Ceiling Plastering (CM 1:3) = 48 kg / 10 m2
- Paint ready mixed one coat = 10 ltr / 100 m2
- Weathering Course = 7.68 Kg / m2
- Flooring = 8.10 kg / m2
- Pressed tiles for weathering course (CM 1:3) = 7.68 Kg / 10 m2
- Granolithic floor finish = 8.10 Kg / 10 m2
- Lime for white washing = 10 Kg/100 m2
- Painting = 10 ltr/ 100 m2
- Distemper 1st coat = 6.5 Kg / 100 m2
- Distemper 2nd coat = 5.0 kg / 100 m2
- Snowcem 1st coat = 30 Kg / 100 m2
- Snowcem 2nd coat = 20 Kg / 100 m2
- Paint ready mixed one coat = 10 ltr / 100 m2
(3). STEEL:-
- Weight of rod per meter length = d2 / 162 where d in mm
- “L” for column main rod in footing is minimum of 300 mm
- Hook for stirrups is 9 D for one side
- For Cantilever anchorage length for main steel is 69 D
- No. of stirrups = (clear span/Spanning) + 1
- Design strength is M 40, target strength is 1.25 x 40 = 50 Mpa
(4) WEIGHT OF ROD PER METER LENGTH :-
- 6mm = 0.222
- 8mm = 0.395
- 10mm = 0.616
- 12mm = 0.888
- 16mm = 1.578
- 20mm = 2.466
- 25mm = 3.853
- 32mm = 6.313
- 40mm = 9.865
(5) CLEAR COVER TO MAIN REINFORCEMENT
- FOOTINGS : 50 mm
- RAFT FOUNDATION.TOP : 50 mm
- RAFT FOUNDATION.BOTTOM/SIDES : 75 mm
- STRAP BEAM : 50 mm
- GRADE SLAB : 20 mm
- COLUMN : 40 mm
- SHEAR WALL : 25 mm
- BEAMS : 25 mm
- SLABS : 15 mm
- FLAT SLAB : 20 mm
- STAIRCASE : 15 mm
- Retaining WALL : 20/ 25 mm
on earth - WATER RETAINING STRUCTURES : 20 / 30 mm
