Laminated Wood Beams Reinforced with Steel Strips

by Karl B. Borgin,
Gerrit F. Loedolff,
Gerald R. Saunders,

Serial Information: Journal of the Structural Division, 1968, Vol. 94, Issue 7, Pg. 1681-1706

Document Type: Journal Paper


Preliminary results on the reinforcing of glue-laminated wood beams are presented and a new method of reinforcing such beams with mild steel strips is described. With this method the reinforcement can be effectively concealed and the beam will retain its natural appearance. The mild steel reinforcing has been successfully bonded to the wood by adhesives, and the reinforced beams have behaved as a true composite within the elastic range. Considerable decrease of deflections and increase of load carrying capacity have been obtained. The stiffness of the beams reinforced on the top and bottom surfaces, has been increased 100% and greater. Shear deflection varied between 14% and 19% of the total deflection and has been an important factor in deflection calculations.

Subject Headings: Wood beams | Displacement (mechanics) | Steel beams | Laminated materials | Load bearing capacity | Reinforcing steel | Bonding | Adhesives

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