Rebar Notes

Concrete Cover

  • Concrete cover is the distance from the edge of the concrete to the edge of the rebar.

Rebar Tie

  • The most commonly used rebar tie in walls is the wrap and snap tie.

Purpose of Tie Wire

  • The main purpose of tie wire is to hold reinforcing bars in place.

Spacing of Longitudinal Rebar

  • The spacing of the longitudinal rebar is not critical.
  • Rebar should not be spaced more than three times the thickness of a slab or wall.

Location of Reinforcing Bars

  • Reinforcing bars should be located three inches from the bottom of a mat slab and two inches from the top.

Standee

  • A standee is used to support the top bars in a thick slab.

Tying Reinforcing Bars

  • Each reinforcing bar should be tied at least three times.

Rebar Bolsters

  • Rebar bolsters are furnished in five foot lengths (55 ft).

Joist Chairs

  • Joist chairs normally carry two bars (22).

Temperature Reinforcing

  • Temperature reinforcing is normally placed on top of other reinforcing.

Pouring Sequence

  • When columns, beams, and slabs are formed at one time, the columns should be poured first.

Stirrups

  • Stirrups are added to beam reinforcing to increase the shear and torsion resistance.

Rust on Rebar

  • Rust is allowed on the surface of rebar.

Spreader Bars

  • Spreader bars are used to lift long rebar.