Notes on building and road-making; with rules for estimating repairs to tanks and channels compiled for the use of surveyors and overseers in the Department of Public Works - Softcover
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1852 Excerpt: ...in these roofs are repniied in the s;ime way as those in terraces, that is, by pouring tar and pitch into tlicm. Cracks are usually caused by the sinking, or хндугну, of ihe rafters, which must of course be followed by the disunion of the tiles, and as the cracks are difficult to repair effectually f care shotild be taken to use none but seasoned wood of sufficient scantling. When the breadth of the verandah is eight or nine feet (and it is not advisable to make sloping terraced verandahs wider) the upper side of the roof should be two feet higher than the lower: this slope will be quite sufficient for the water to run off readily. Couple roofs with flat und pantiles.--The most simple form of a roof is that which has only one row of timbers, arranged in an inclined plane, which throws the rain entirely to one side. This is called a. sf/edioofoi a lean to. For rectangular buildings, the roof consists either of two rectangular planes of equal breadth equally inclined, and terminating in a line parallel to the horizon, when it is called a fient roof, or else the four sides of the roof are formed by inclined planes, when it is said to be a hipped roof and the inclined ridges, springing from the angles of the wall, are called the hips. If two portions of roof meet and intersect each other at right angles, a hollow or concave angle will be produced, and that is called и valley. The usual frame work of tiled roofs consists of a series of couples, each formed of two rafters a a (PI. XVI. fig 2) meeting at an angle and connected by one or two pieces of wood b b termed collar beams. The couples are generally made with palmirahs, but sometimes with teak or a commoner description of wood. The couples are placed one and a ...
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