The Rafters
are next nailed in place, with one nail each, and a stay-lath fastened on, to hold them in place. Now test the ends with your plumb-level, and when they are found to be correct, nail all the rafters securely in place; stiffen the centre pair with a piece called a collar (see Fig. 69). Add four purlins (Fig. 69), set at right angles to the rafters, and take off your hats and give three cheers.
But do not forget to