Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 271
a large timbersleeper 12 in. by 12 in. or more, as the casemay demand. The object of the abovearrangement is to obtain the necessary sup-port for the shoring, at sufficient distancefrom the pillar to allow ample room for its 246 CARPENTRY AND JOINERY. removal or the further shoring of it, and… … Fig. 823.—Conventional View of Joints of Centres. centres are also supported in the middle bytrestle shoring, which will take a full share ofthe load, and thus to a large extent reduce
Carpentry · Joinery
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