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Deshuttering period for formwork

  Element Description  Summer      Winter Vertical member of column,  wall,beam    16 hr      24 hr Soffit of slab       3 days      7 days Soffit of beam    7 days      10 days Props of slab-Span upto 4.5m     7 days      10 days Props of slab-Span greater than  4.5m    14 days      14 days Props of beam-Span upto 6 m    14 days      14 days Props of beam-Span greater than  6m    21 days      21 days
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What is the number of bricks required in 1m3 of wall ?

  Standard size of brick = 240mm*115mm*57mm as per NBC Assume the size of mortar as 10mm Size of brick with mortar = 250mm*125*67mm Volume of 1 brick = (240*115*57)/1000 3 =1.573*10 -3  m3 Volume of 1 brick with mortar= (250*125*67)/1000 3 =2.093*10 -3  m3 Volume of mortar = 2.093*10 -3 -1.573*10 -3  m3=5.2*10 -4  m3 No of bricks required in 1m3 wall without mortar= 1/1.573*10 -3  =635.72 numbers No of bricks required in 1m3 wall with mortar = 1/2.093*10 -3  =477.78 numbers Assume 10% wastage , No of bricks for 1m3 wall construction = 477.78*1.1 =525  number
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