How close to the edge should rebar be?

Herein, how far should rebar be placed from edge of concrete?

Therefore, for a typical 100 mm residential concrete slab, the rebar should be placed at a depth of approximately two thirds the slab thickness from its surface.

Subsequently, question is, how often should rebar be tied? Tying is required at every second or third intersection, depending upon the size and spacing of bars, but with not less than three ties to any one bar, and, in any case, not more than 4 to 6 feet apart in either direction. Rebar is placed in footings very much as it is placed in floor slabs.

Simply so, where do you put rebar?

Placement of Rebars It is a general rule that reinforcements should be placed at the tension side at the bottom of the footing. In a square footing, rebars are placed uniformly in both directions. ACI code requires that the rebars be placed not more than 18 inch apart.

Do you need rebar for 4 inch slab?

A concrete slab reinforced with rebar or welded wire fabric should have a minimum 1 1/2 inches of clear cover between the reinforcing and the top of the slab. On grade you can get away with welded wire fabric in most instances. Suspended slabs almost always require rebar reinforcing.