House Designs, Drawings

27/12/2025

26/06/2025

Basics of Civil Engineering

1. Height of 1 story in building = 3.15m.

2. Height of Parapet wall should be 1m.

3. Height of window = 2.1m.

4. Minimum thickness of slab = 125mm.

5. Minimum thickness of lintel = 15cm.

6. Thickness of DPC = 2.5cm.

7. Maximum diameter of the bars used for lapping is 36mm. Bars having more than this diameter are not allowed.

8. Minimum diameter of bars used in Slab = 8mm.

9. Minimum diameter of bars used in Column = 12mm.

10. Minimum number of bars used in Square or Rectangular Column=4 bars.

11. Minimum number of bars used in Circular Column 6 bars

12. Maximum diameter of bars used in Slab = 1/8 x thickness of slab.

13. Maximum Chair spacing=1m.

14. Chairs minimum of 12 mm diameter bars to be used.

15. Minimum diameter used for Dowels Bars is 12mm.

16. Longitudinal reinforcement should not be less than 0.8% and not be more than 6% of gross area of cross section.

17. Binding wire required in steel reinforcement is 8kg per MT

18. Weight of cement baq = 50kg.

19. 1 bag of cement = 1.25 cubit feet = 0.0347 cubic meter.

20. No. of Cement Bags in 1m³ = 7-8 bags.

21. Initial setting time of Cement - 30 minutes.

22. Final setting time of Cement = 10hrs = 600 minutes

23. PH value of the winter should not be less than 6.

24. Riser of staircase 150mm to 200mm.

25. Tread of staircase 250mm to 300mm.

26. Tensile or Flexural strength of concrete = 0.7-/fck.

27. Modulus of elasticity of concrete = [Ec=5000/fck].

28. Young's modulus of steel = [Es=2x10^5 N/mm2].

29.Standard size of Brick = 190mmx90mmx90 mm =19cmx9cmx9cm.

30. Colour of good brick is deep red, cherry or copper colored.

31. The ordinary Portland cement consists of 62 to 67% of Lime

32. The initial setting time of OPC should not be less than 30 minutes

33. The Final setting time ordinary Portland cement of ordinary Portland cement should not be more than 10 hours.

15/06/2025

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17/04/2025

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