Roof Truss Rafter And Purlin

From this shot it appears that there are three purlins on either side of the roof.

Roof truss rafter and purlin.

Parts of a traditional queen post roof truss. Add to list click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to your list. Posted in metal roof roof types. You have to take the width of your roofing panel into the considerations.

The most common measurement used for rafter spacing is either 16 or 24 inches. In timber construction purlins are nailed to the rafter or supporting trusses while in steel roof construction they are welded or bolted to the rafters or trusses by the means of cleats. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof. There are three types of purlins in wood construction.

The purlins are the large beams perpendicular to the rafters. Note that these are normally only required to trussed rafter roofs and not for traditional purlin and rafter roof construction. A common arrangement is a rafter and purlin system which combines purlins and rafters. Purlin plates under purlin principal purlins and common purlins.

Trusses usually occur at regular intervals linked by longitudinal timbers such as purlins. The longitudinal horizontal beam that is sitting on a post or the principal rafter of a truss and used to support common rafters. The sheathing boards are sometimes called the roof deck and are painted white. Click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to the compare list.

This is the right way to fix truss clips connecting the rafter and wall plate. Determining rafter s spacing is as important as setting the metal roof purlins spacing. The roof support system is a ridgepole and either rafters which run perpendicular from the top of the walls to the ridge or purlins which run parallel to the ridge. Compare click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to the compare list.

Rafter boards are fastened to the ridge board at the peak and the top plate where they join the wall. In finished space insulation is placed between the rafter boards and drywall or other material is fastened to the face.