The Complete Guide to Basic Civil Engineering Knowledge
BASIC OF CIVILENGINEERING
1. HEIGHT OF BUILDING = 3.15M.
2. HEIGHT OF PARAPATE WALL = 1M
3. HIGHT OF WINDOW = 2.1M
4. MINIMUM THICKNESS OF SLABE = 125MM
5. MINIMUM THICKNESS OF LINTLE = 15CM
6.THICKNESS OF DPC = 2.5CM
7. MINIMUM DIAMETER OF BARS USED IN SLABE = 8MM
8. MINIMUM DIAMETER OF BARS USED IN COLUMN = 12MM
9. MINIMUM NUMBER OF BARS USED IN SQUARE OR RECTANGULAR COLUMN = 4 BARS
10. MINIMUM NUMBER OF BARS USED IN CIRCULAR COLUMN = 6 BARS
11. MAXIMUM DIAMETER OF BARS USE IN SLAB = 1/8 X THICKNESS OF SLAB
12. MINIMUM CHAIR SPACING = 1M
13. MINIMUM DIAMETER OF BARS USE IN CHAIRS = 12MM
14. BINDING WIRE REQUIRED IN STEEL REINFORCEMENT PER MT = 8KG
15. WEIGHT OF CEMENT 1 BAG = 50KG
16. 1 BAG OF CEMEMT = 1.25 CFT
17. 1 BAG OF CEMEMT = 0.0347 CUM
18. NO OF CEMENT BAG IN 1CUM = 28.8 BAGS
19. INITIAL SETTING TIME OF CEMENT = 30 MINUTES
20. FINAL SETTING TIME OF CEMENT = 10 HRS = 600 MINUTES
21. RISER OF STAIRCASE = 150MM TO 200MM
22. TREAD OF STAIRCASE = 250MM TO 300MM
23. ANGLE OF STAIRCASE = 25° TO 40°
24. STANDEAR SIZE OF BRICK = 190MM X 90MM X 90MM
25. COMPRESSIVE STRENGTH OF BRICKS IS = 3.5 N/MM2
26. MAXIMUM WATER ABSORPTION OF FRIST CLASS BRICKS IS = 15% OF THIS DRY WEIGHT
27. UNIT WEIGHT OF CONCRET = 25KN/CUM
28. UNIT WEIGHT OF STEEL = 78.5KN/CUM
29. 1 CUM BRICKS WARK NO OF BRICKS = 500 NOS
30. LAPPING IS NOT ALLOWED MORE THAN 36MM DIAMETER OF BARS
31. Grade of Concrete
Grade of Concrete The proportion of C:S: A
M5 1:5:10
M7.5 1:4:8
M10 1:3:6
M15 1:2:4
M20 1:1.5:3
M25 1:1:2
32. Clear Cover for main reinforcement
For Beam: 25mm
For Slab: 15mm
For Flat slab: 20mm
For Staircase: 15mm
For Watertank Structure: 20 to 30 mm
For Retaining Wall: 20 to 25mm to the earth’s surface
For Column: 40mm
For Shearwall: 25mm
For Raft foundation topside: 50mm
For Raft foundation Bottom and Sides: 75mm
33. Unit Conversation
1 foot = 12 inches
1 foot = 0.304 meter
1 foot = 304.8 mm
1 foot = 30 cm
1 inch = 25.4 mm
1 inch = 2.54 centimeter
1 yard = 3 ft
1 yard = 36 inches
34. De-Shuttering Period of Different RCC Members
The recommended period for columns, walls, and vertical formworks is typically 16 to 24 hours. This refers to the duration that the formwork should be kept in place before it can be safely removed.
Period for Soffit formwork to slabs – 3 days (props to be refixed after removal)
The period for Soffit to beams props – is 7 days (props to be refixed after removal)
Beams spanning up to 4.5m – 7 days
Beams spanning over 4.5m – 14 days
Arches spanning up to 6m – 14 days
Arches spanning over 6m – 21 days
35. The density of Construction Materials
Bricks – 1600 – 1920 kg/m3
Concrete block – 1920 kg/ m3
Reinforce Concrete – 2310 – 2700 kg/ m3
Plain cement Concrete- 2400 kg/m3
Lime mortar- 1760kg/m3
Aluminum – 2739 kg/m3
Glass – 2580 kg/m3
Zinc – 7135 kg/m3
Clay soil – 1900 kg/m3
Bamboo – 350 kg/m3
36. Steel Char maximum spacing is 1.00 m (or) 1 No per 1m2.
37. Steel Chairs minimum of 12 mm diameter bars to be used.
The minimum number of bars used for a square column is 4, while for a circular column, it is 6.
38. The minimum thickness of the slab should be 125 mm.
39. Lap splices shall not be used for bars larger than 36 mm.
40. Water absorption of bricks is limited to not more than 15 %.
The Complete Guide to Basic Civil Engineering Knowledge