Mounting joists onto steel beams

Structure · Beams · printed page 48 (PDF page 49)

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Book index entries

Steel Attached to Joists Attached to Steel Beams Steel Beam – Attached to Joists Structural

Text in the illustration

inferior
sometimes found in older homes - (causes joists-weakening cracks)
beam
joist
perspective view
crack extends from notch in joist
front view
preferred
2"x2" splice at least 2' long
provide 1/2" clearance between splice and beam to accommodate shrinkage
continuous 2"x2" bolted through beam web every 2' (min.) with 1/4" dia. bolts

Generated explanation

The illustration compares inferior and preferred methods of mounting wood joists onto steel I-beams. The upper perspective and front views show joist ends notched to fit between the beam flanges, with a crack extending into a joist from its lower notch. The lower front views show preferred arrangements with a 2-by-2 splice at least 2 feet long joining opposing joists above the beam. One arrangement includes continuous 2-by-2 supports bolted through the beam web and specifies a half-inch clearance between the splice and beam to accommodate wood shrinkage.