Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 136
the wall platesand act as ties and counteract the out-ward thrust on the walls. The ceilingjoists are usually supported at the centreby being nailed up to a beam which istied to the ridge by pieces of board 5 ft.or 6 ft. apart (Fig. 443). A collar-beam is a horizontal beam orbrace, generally of the… … Fig. 443.—View of Method of Tying CeilingJoist to Ridge. and the rafters are notched on ; whereasat b the purlin is fixed with its sides atlight angles with the pitch of the rafters, 118 CARPENTRY AND JOINERY. this being probably the stronger method.This roof is additionally strengthened…
Carpentry · Joinery
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