Building construction and superintendence, by F.E. Kidder ... (1896)
Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, W.T. Comstock · leaf 239
urlins werespaced at the joints the rafters should be 2 x 6, while by spacingthe purlins as shown 2 x 4 rafters will answer even with slateroofing, and on a large roof this will effect quite a saving in cost. We will assume that the trusses are spaced 12 ft. apart oncentres. The roof area supported… … hence the roof area directly supported at joint 5 = 152 sq. ft. Aspurlin A. comes at a joint its load is transmitted directly to thejoint. The reaction of purlin B, coming at a point between two
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