Rebar spacing is calculated so that each square foot of reinforced area is sufficient for its load and can be calculated using a rebar spacing calculator. Taking grade, size, spacing and location into consideration, calculations are based on length and width of concrete in conjunction with rebar size and bar spacing.
To calculate rebar spacing, online calculators provide exact calculations for consistent rebar spacing to reinforce the concrete layout. Using an online calculator, enter the length and width of the concrete slab as well as the on-center spacing and edge clearance of the bars. Select the bar size and submit calculations to determine spacing plan. Follow rebar engineering specifications to prevent structural failures.