BASIC POINTS IN CIVIL ENGINEERING

BASIC POINTS IN CIVIL ENGINEERING You Should Know,

Height of Residential Building	3.1 m
Height of Window	1.5 m
Height of Door	2.1 m
Minimum diameter of bars used in the column	1 m
Minimum height of Wall Construction in 1 day	1.5 m
Density of Cement	1440 kg/m³
Minimum Thickness of Slab	125 mm (or) 5” Slab
Volume of Cement Bag	1.25 CFT (or) 0.0347 m³
Number of Cement Bags in 1 m³	28.8 bags
Lintel Thickness =	150 mm
Lintel is Provided at	2.1 m in case of a brick wall
DPC Thickness	25 mm
Slope of Stairs	25° – 40°
Min Rise	150 mm
Min Tread	230 mm
No. of Bricks in 1 m³	550 Nos
Grade of Concrete for RCC Slabs	M20
Free Fall of Concrete	1.5 m
Compressive Strength of Brick is	7.5 N/mm²
Standard Size of Brick	19×9×9 (cm³)
Standard Size of Brick with Mortar	20×10×10 (cm³)
No. of Bricks in 1 m³	Minimum diameter of bars used in the column
Dimensional tolerance of a cube	12 mm
Lapping should not be provided for	36 mm diameter bars
Minimum diameter of bars used in the column	36 mm dia bars
Max dia bars used in the slab	12 mm
Lapping should not be provided for = 36 mm diameter bars	1/8 × thickness of slab
Minimum diameter of bars used in the slab	8 mm
Max dia bars in dowel bars	12 mm
Max water absorption of first-class bricks	Max water absorption of first-class bricks = 15% (dry weight)
Dimensional tolerance of cube	± 2 mm
Initial setting time of cement	30 mins
Final setting time of cement	600 mins (10 hrs)
DPR	Detailed Project Report
Unit weight of RCC	= 25 kN/m³ (25000 N/m³)
Unit weight of PCC	24 kN/m³ (24000 N/m³)
Steel unit weight	7850 kg/m³
Weight of brick	3.85 kg
Unit weight of sand (fine aggregate)	→ 1600 (dry) kg/m³ → 1840 (river) kg/m³
Unit weight of coarse aggregate (stone)	3 feet (This seems to be a unit error; likely meant to be in kg/m³ or similar)
Mix Grades	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
Cement strength checking at	7 days, 14 days, 28 days
Cement Mortar Mixes	2.1 m in the case of a brick wall
Interior plastering mix	Ordinary masonry work = 1:3 to 1:6 Load bearing structure = 1:3 to 1:4 Reinforced brick work = 1:2 to 1:3 Moist situations = 1:3 (Cement: Sand)
Exterior plastering mix	1:3
Flight Height	1.5 m (or) the height of existing floor
Compressive strength is obtained at	28 days