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FIGURE 12.4

Headers and trimmers for floor openings are doubled and nested to create strong, stable box members. Only one vertical flange of the joist hanger is attached to the joist; the other flange would be used instead if the web of the joist were oriented to the left rather than the right.

 

 

FIGURE 12.5

A typical window or door head detail. The header is made of two joists placed with their open sides together. The top plate of the wall, which is a runner channel, continues over the top of the header. Another runner channel is cut and folded at each end to frame the top of the opening. Short studs are inserted between this channel and the header to maintain the spacing of the studs in the wall.

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