Wilson’s Carpentry and joinery / by John Wilson (1891)
Wilson, John · Manchester [England] : Percy Bros. · leaf 26
ridge. See side elvation. The foot of the lower strut is secured by a cast-iron shoe. The verticalbolt, the two g coach, and the two nibs (one at each end) prevent any movingof the strut. See elevation and plan of the shoe. The two centre struts are secured in a double shoe ; the elevation, planand… … ROOF TRUSSES.-CuHli/iHfrf. In this, the purlins are arranged so that the bearing distance shall notexceed ». In order to do this, the 6econd or centre purlin is placed belowthe queen post; and the top purlin is so placed that it gives an equal bearingfor the common rafter, from the ridge to the…
Carpentry · Joinery
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