How do you calculate qty for form work like props shuttering sheet and acro sp

How do you calculate qty for form work like props shuttering
sheet and acro span for residential block ?
for Example: 10 sq mt what is the material and qty require to
do form work.

Question Posted / rohn

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How do you calculate qty for form work like props shuttering sheet and acro span for residential b..

Answer / narayani upadhyay

I am not sure too much about it, but it gives an idea for calculating the props , number of sheets and acrospane in a building form work.
size of ms sheet (steel sheet)= 2' * 3'=6 6sqft
props should be between 500 mm to 600 mm to each-other.
Acrospane are uses from one end to other end for supporting the ms sheet on slab.
lets assume the size of 2 BHK = 1000 sqft
=Number of sheet required =1000/6=166.67 approx=170
Add 10 to 15 % wastage=170*1.10=187
=If depth of slab less than 175 mm = 4 sheet contain 1 acrospane.
= If depth of slab more than 175 mm=5 sheet contain 1 acrospan
= lets assume depth of slab= 125 mm
= Number of acrospane= 187/4=46.75 approx=50
=number of props requred= it depend on the size of beam and length of beam around the slab.Total length of beam in running meter around the slab(incuding sunken,balcony ,ots and staircase)=70 m
=props should be between 0.5 m to 0.6 m.
=number of Props for BEAM length=70/0.6=116=approx 120
=Number of props for slab=50*2=100
= Total number of PROPS=320

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How do you calculate qty for form work like props shuttering sheet and acro span for residential b..

Answer / thamaraikani

simple constructin material calculation:
sheet,span and props
assuming :1000sqm builtup area
step1:sheet
1000/0.9*0.6=1851nos
step2:span
note:(slab thickness less than 175=4sheet)
(slab thickness more than175=5sheet)
span=1851/5=370nos
step3:props
note:(slab thickness less than 175=4sheet/2)slab thickness less than 175=5sheet/2)
props=370*2.5=925nos

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