REBAR NOTES TO SITE ENGINEERS

Following are the general points to remember for civil site engineers to make the construction work easier while monitoring quality of construction related to reinforcement work,

• Lapping is allowed for the bars having diameters more than 36 mm.
• Chair rod maximum spacing is 1.00m (or) 1 no per 1m2
• For dowels rod minimum of 12mm diameter should be used.
• Chairs minimum of 12mm diameter should be used. 
• Longitudinal reinforcement not less than 0.8% and more than 6% of Cross C/S 
• Minimum bars for square column is 4 no’s and 6 no’s for circular column. 
• Main bars in the slab shall not be less than 8mm (HYSD) or 10mm (main bars) and the distributors not less than 8mm and note more than 1/8 of slab thickness.

• Minimum thickness of slab is 125mm ()

• Dimension tolerance for cubes + 2 mm

• Free fall of concrete is allowed maximum to 1.50m.

• Lap slices not be used for bar larger than 36mm.

• Water absorption of bricks should not be more than 15%

• PH value of the water should not be less than 6

• Compressive strength of bricks is 3.5 N/mm2

• In steel reinforcement binding wire required is 8 kg per MT