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Question
how to calculate the steel for rcc slab?
plz tell me the formula for calculating the steel?
 Question Submitted By :: Civil-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 11
Short formulas.
for coloums=1% t0 5% of concrte volume
for beams=.7% t0 1%
for beams=.5% .8%
 
Is This Answer Correct ?    17 Yes 3 No
Engr Shabbir
 
Answer
# 12
no of bars=(total area of reinforcement)/area of one steel
bar
 
Is This Answer Correct ?    35 Yes 29 No
Kavya Purushoth
 
Answer
# 13
Total iron required is 115 Kg per 100 squire feet. 
Is This Answer Correct ?    23 Yes 17 No
K.k. Gupta
 
Answer
# 14
practically for slabs steel is caluclated in this manner:
for a given room of size 6.5x5.2,first we provide main reinforcement in shorter span and distribution steel in longer span.so,here we provide main reinforcement in breadth side(i.e... 5.2m side).and distribution in other side.so,we preapre a tabular form for a given spacing and dia of steel.
then we caluclate no of bars.therefore,no.of bars=length/spacing.next bar length is caluclated according to sections given.i mean there will be given different sections for rooms and given a brief diagram for steel placing.so both top mat and bottom mat we caluclate the bar length.for both main and distribution steel.to find qty=bar lengthxno.of barsx((dxd)/162)xunit weight of steel.here note that length and bar lengths are different.length means room size and bar length means length of bar with projections inside the room.
l spacing no dia barlength qty
main steel:
top mat 6.5 0.15 44 10 this is acc to
section
bottom mat 6.5 0.15 44 10 5.2+0.23+0.2
distribution steel:
top mat 5.2 0.2 26 8 6.5+0.23+0.2
bottom mat = 0.2 8 6.5+0.23+0.2
=same as main steel top mat
here 0.23 is wall thickness.so both sides 0.23 means we take one 0.23 and add bending value as 0.2 in most cases
 
Is This Answer Correct ?    11 Yes 6 No
Sri
 
Answer
# 15
it will be depend on the area. just calculate the area then
spacing.,.,after than total length/ spacing = no of bar. use
the formula d*d/162 = total steel waight per meter.,.,.
multiply total to total length= total steel in the rcc slab
 
Is This Answer Correct ?    9 Yes 4 No
Dinesh Chahal
 
Answer
# 16
For estimation purpose , the quantity of steel will be 120
kgs x rcc quantity
 
Is This Answer Correct ?    17 Yes 13 No
B.narayana Murthy
 
Answer
# 17
The above are to design steel requirments in a slab.
However to calculate amount of steel in a slab u simply need
drawings. A simple assumtion of 10d (i.e:- 10 * diameter )
is ok for bent up calculations.
 
Is This Answer Correct ?    6 Yes 2 No
Luke
 
Answer
# 18
total concrete qty multiply by 1 to 1.5percent
and then answer multiply by 7850(steel density)
which gives total weight of steel in KG for
concrete
 
Is This Answer Correct ?    4 Yes 0 No
Ajit Sangale
 
Answer
# 19
ast=(0.5fck/fy)(1-root of(1-4.6mu/fck*b*d*d))b*d 
Is This Answer Correct ?    4 Yes 1 No
Abdul Hadi
 
Answer
# 20
Formula = 24.89 x 4.9 x Quantity of RCC in M3 = Required Mild steel in ton
2204
 
Is This Answer Correct ?    3 Yes 0 No
Fayaz
 

 
 
 
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