Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 136
.—Half Section through Couple Roofwith Purlins. through a little more than one half of a roofof this description is given at Fig. 440, aconventional view being shown by Fig/441.The number of purlins should be increasedas the span is increased, so that the commonrafters do not have a greater bearing… … Fig. 441.—Conventional View of Half a Couple Roof with Purlins.
Carpentry · Joinery
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