UNITS OF MEASUREMENTS, PAINTING COEFFICIENT, OUT TURN, QUANTITY CALCULATION

 

DEDUCTION 

• MASONRY : < 0.1 m2 - no deduction 

• PLASTERING : 

< 0.5 m2 - no deduction 

0.5 - 3 m2 - one side deduction 

> 3 - both side deduction 

• End of beams, rafters, purlins < 0.05 m2 - no deduction 

• Bearing of floors, roof slabs etc. - no deduction

DIGREE OF ACCURACY 

• Volume - 0.01 m3 

• Area - 0.01 m2 

• Dimension - 0.01 m 

• Weight - 1kg 

QUANTITY CALCULATION 

PCC 

• Maximum size of aggregate 40 mm 

• For 1 m3 PCC - 0.95 m3 coarse aggregate is required 

RCC 

• Maximum size of aggregate 20 mm 

• For 1m3 RCC - 0.90 m3 coarse aggregate is require 

RCC For 1:1.5:3 

Wt of cement = (1/3) x 0.90 x 1440 = 432 kg 

Wt of sand = (1.5/3) x 0.90 x 1600 = 747 kg 

PCC For 1:4:8 

Wt of cement = (1/8) x 0.95 x 1440 = 171 kg 

Wt of sand = (4/8) x 0.95 x 1660 = 760 kg

PLASTERING 

1:3 - 0.14 m3 / 10 m2 (sand) cement = (1/3) x 0.14 x 1440 = 67 kg 

1:4 - 0.15 m3 / 10 m2 (sand) cement = (1/4) x 0.15 x 1440 = 54 kg 

1:5 - 0.15 m3 / 10 m2 (sand) cement = (1/5) x 0.15 x 1440 = 43 kg 

1:6 - 0.15 m3 / 10 m2 (sand) cement = (1/6) x 0.15 x 1440 = 36 kg 

• For 1 m3 random rubble masonry - 0.3 m3 mortar 

• For 1 m3 brick masonry - 0.3 m3 mortar 

• For 1 m3 brick masonry - 0.24 m3 sand 

• 1 m3 dry volume of concrete - 1.54 m3 wet volume 

• 1 m3 dry volume of mortar - 1.2 m3 wet volume 

• For 1 m3 stone masonry amount of stone required - 1.3 m3 

• For 1 m3 bricks required - ( 500 standard ) / ( 460 nominal ) 

• For 1 m3 Mangalore pattern tiles required - 16 • For 1 m3 number of laterite required - 60

RCC WORKS AND STRUCTURES 

Density of steel - 7850 km/m3 , 78.50 quintal/m3 

In the absence of detailed estimate % of steel taken : 

• Foundation - 0.5 - 0.8 % 

• Lintel and slab - 0.7 - 1.1% 

• Beam - 1 - 2 % 

• Column - 1 - 5 % 

HOOK LENGTH 

each side - 9d ( d is the diameter of bar ) total length = L + 18 d 

CRANKED / BENDUP BAR

For 45 degree bend up bar crank length = 0.42 d = 0.45 d for 30 degree bend up bar crank length = 0.27 d = 0.30 d 

PREVIOUS YEAR REPEATED QUESTIONS