Cold-formed steel joist framing accommodates openings up to four and a half feet wide using a 400JS250-54 sixteen-gauge member. Two and a half inch dimensions mark the layout spacing around the opening. Connection weld symbols specify a one-eighth inch weld size.
400JS250-54 (16 GA) 1/8 1 - 12 . 2 1/2" 2 1/2" OPENING UP TO 4'-6" A
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