Add in walls and columns.
Estimate rebar concrete slab.
This calculator is to be used as an estimating tool only.
Work out the steel per m2.
Rebar calculator slab driveway or patio calculate the amount of rebar reinforcement needed for slabs and drive ways.
Calculate optimal rebar spacing and weight for concrete slabs.
Start by multiplying each of those measurements by 12 to get your dimensions in inches which in this case would be 240 inches by 360.
First work out your slab area.
Calculate rebar spacing layout and weight in a concrete slab.
Layout of rebar for concrete slabs to estimate the quantity of rebar in slab to strengthen concrete slabs you ll have to assess the required measure of rebar for your two dimensional shape.
This is needed to determine both the lengths of the rebar and how many rows and columns are needed.
Total length total width bar spacing exact spacing equal spacing adjusted edge clearance bar size.
Interactive scaled diagrams inch.
Regardless of what the particular format might be the procedure is generally the equivalent.
Subtract the clearance from the length and width to find the dimensions of the grid.
Click the button to calculate the volume of concrete and man hours not including mixing needed for this job.
Say 15m x 20m for simplicity as an example.
Multiply the steel per m2 x your slab area.
Calculating what you need for the sake of easy examples assume you re pouring a slab that s a simple rectangle of 20 by 30 feet and you ve figured out that you ll need the rebar set at 14 inches on center.