Slab Steel Calculation

 Calculate Steel of Slab:

We are going to talk about the Simple slab steel for this case A Example below:

A One Way slab  Having size  ( 25 X 40 ) ,

Main Bars #4 @6"C/C , Distributtion Bars #4@7" C/C. Calculate Total Steel in KG.

When we have a One Way slab then we always used steel Main at Shorter span and Distt. bar at larger span.

So,

 Shorter span is 25ft then #4 @6"C/C Used.

Longer span is  40ft then #4@7" C/C used.

Now First of All we need to calculate Total number of bars:

Convert ft into inches:

25X12= 300inches.

40X12= 480 inches.

Nos. Main Bars= Span/Spacing+1

=  480/6+1= 81Nos.

Nos. Distt. Bars= Span/Spacing+1

=300/7+1= 43.85 ,Say 43 Nos.

Now secondly we need to calculate cut length of bars:

So,

Main bars=25ft

Distt. bars= 40ft.

Now calculating Unit weight of steel

Dia-#4 =(4x4)/52.91 =0.30kg/ft.

Total weight of Steel:

Main bars= Nos X Length X Unit weight

                  = 81x25x0.30= 607.5 Kg.

Distt. bars= Nos X Length X Unit weight

                  = 43x40x0.30= 516 Kg

Sum= (607.5)+(516)= 1123.5 Kg.