How to Reinforce Concrete Chairs with Wire Galvanized Stainless Steel

Cut lengths of rebar to the appropriate size for your chair using a reciprocating saw. Since the rebar should run both lengthwise and width-wise, you might need to cut several different lengths.

Insert the end of the rebar rod into a thick metal pipe. Place the pipe on the ground, and secure it in place with your foot. Firmly grasp the rebar, and tug upwards, bending the rod, working slowly to avoid over-bending. Pay particular attention to the area where the seat of the chair meets the back to ensure a good fit.

Lay the rebar into your concrete form at 6-inch intervals. Add the lateral pieces first followed by the vertical pieces to form a grid. Remember as you lay the grid that rebar should be insulated on each side by a layer of concrete no less than 3 inches thick.

Secure the grid together by wrapping a thin, stainless steel wire around each joint. Use a galvanized wire to avoid rust.

Prop the rebar grid on rebar trenches, following the manufacturer's instructions. Rebar trenches are small, plastic couplings which attach to the rebar and lift the rebar off the base of the concrete mold. In addition to suspending your rebar in the mold, rebar trenches will prevent the rods from settling or shifting as the concrete hardens.

Pour your concrete mixture into the mold, taking care not to disrupt the rebar grid. Work carefully to avoid developing air bubbles around or underneath the rebar.