GLB Beam Seat
Misc. Connectors for Engineered Wood
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The GLB is designed to support and connect glulam, sawn lumber or engineered wood beams to structural concrete or concrete masonry unit (CMU) pilasters. The rectangular, steel-plate seat features two vertical plates that secure the beam with one or two bolts and has two #6 by 12"-long rebar for placement in forms before concrete is poured. This glulam beam seat provides necessary bearing capacity at structural walls.
- Designed for cast-in-place applications
- Provides additional bearing for beam connections
- Steel plate provides barrier for wood from masonry
- Simpson Strong-Tie gray paint. Hot-dip galvanized available; specify HDG.
- Use all specified fasteners; see General Notes
- Bolt hole diameters in wood shall be a minimum of 1/32" to a maximum of 1/16" larger than the bolt diameter (per the 2015/2018 NDS)
- Check the rebar spacing requirements on all installations
- Beam seats for sawn timber and other sizes may be ordered by specifying special dimensions; use the letter designations shown on the illustrations
- Specify if two-bolt GLB model is desired; see illustration
- Allowable bearing stress for masonry is based on an f'c of 1,500 psi using the IBC (ACI 530) Allowable Stress Design. Wood bearing is based on an f'c-perp of 650 psi.
- When installing on masonry, use the lesser of the masonry or the wood allowable load values. When installing on concrete, use a minimum f'c = 2,500 psi and use the wood values as the limiting allowable bearing load values.
- Allowable horizontal loads are bolt values and include increase for wind or earthquake loading. Loads must be reduced if stresses in masonry or concrete are limiting.
- Beams must fully bear on base plate.
- Specify "W" dimension when ordering.
- Uplift loads do not apply for this connector.
Code Reports & Compliance