Common thumb rules for civil engineering works

Thumb Rules are very important for any civil engineer, Site engineer, or civil supervisor to obtain instant decisions on the construction site. Click here to read more

1. THUMB RULES

2. THUMB RULE OF CONCRETE MATERIAL REQUIREMENT

3. Thumb rule to calculate the Steel quantity required for Slab,
Beams, Footings & Columns:
For Residential buildings - 4.5Kgs - 4.75 Kgs /SFT
For Commercial buildings - 5.0Kgs - 5.50 Kgs/SFT

4. Calculation of quantities of cement, sand and
aggregate in 1㎥ of concrete
8 bags of cement required for 1 cu.m of M-20 grade.
concrete.
693 kg of Sand required for 1 cu.m of M-20 grade
concrete.
1344 kg of 20mm Aggregate is required for 1 cu.m of M-
20 grade concrete.
180 litres of water is required for 1 cu.m of M-20 grade
concrete.
Example taken for M-20 (1:1.5:3) grade of concrete:

5. THUMB RULE FOR BRICK WORK
Size of brick : 190mm x 90mm x 90mm
Number of bricks per cum : 500

6. THUMB RULE FOR PLASTERING WORK
Rs. 350 only