Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 161
onlythis portion. The compressional stress isthen transmitted to the lower principalrafter, the remainder of the queen-post short; then the tie-beam is forced to theshoulders of the queen-posts, and secured bystraps or bolts, and this clearly producestension in the queen-posts from their… … Fig. 532.—General Outside View of Apse End of Collar Beam Truss Roof. being in tension; this may be curious,but is nevertheless a fact. The object ofthe tie-beam is to extend from wall towall, taking the ends of the principal rafters,and thus preventing the outward thrust ofthe principal rafters on…
Carpentry · Joinery
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