Reinforce Wood Beam With Steel Plate

Metallic reinforcement includes bars plates and stirrups 1 2 3 4.

Reinforce wood beam with steel plate. The usual solution is to add cover plates. The steel plate should be as long as the beam with bolt holes punched or drilled through the steel. Steel reinforcement is one of the most popular reinforcing materials for timber beams. Steel is wide used as a material.

Another way to reinforce a beam is with a flitch plate. The elastic moduli of the wood and steel are e1 1 250 ksi and e2 30 000 ksi respectively. In this method a steel plate is sandwiched between two identical wooden beams and the beam and steel sandwich is bolted together. The application of steel plates is an effective way of strengthening timber beams susceptible to bending.

The bending moment is 92 ft k. Steel plates of 2 3 and 4 mm thick were used to reinforce the wood element specimens. As an example we will look at a w12x26 beam with a 6 notch in the compression flange. Dimensions of the cross section are b1 5 50 in d1 11 50 in b2 4 75 in and d2 0 60 in.

Prior to bonding the steel plates were sand blasted and then carefully degreased with acetone. If simply supported then the cover plate should be welded full butt weld at mid point. This however is only a solution and should not be the norm. The beam is grade a992 and reinforcement will be grade a36.

The solution is simple sister on an 18 gauge 1 5 8 x6 steel stud material to act as a joist running plate to plate. Why do you have to reinforce a steel beam to resist bending. As a starting point select reinforcement with an area 1 5 times greater than the flange area multiplied by the ratio of beam to plate yield strengths. The epoxy mixture applied in the tests consisted of.