Log Purlin Roof Construction

By supporting the rafters they allow longer spans than the rafters alone.

Log purlin roof construction. 100 of the bearing surface is in contact at the member connection. We can supply logs or timbers for trusses purlins posts and floor joists. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. A purlin plate in wood construction is also called an arcade plate in european english under purlin and principal purlin.

Purlins are 2 by 4 feet and are installed much like metal roofing. For accuracy and tight fit these trusses cannot be matched. They give added support to the roof and also provide a nailing surface for the end panels and drip edge. The log connection is a leading producer of quality hand crafted log homes log cabins custom log homes and post and beam style log homes.

In lightweight timber roof construction under purlins were used to support rafters over longer spans than the rafters alone could span. For our friends jack and bob there was no doubt they wanted timberhaven s beam purlin roof system in their dream log home. The term plate means a major horizontal supporting timber. In homes with full second floors the main level ceilings often use log beams for overhead looks and to support the ceiling which is also the upper level floor.

Beam purlin 6x8 rafter 2x cathedral and pre fab truss. Purlin plates are beams which support the mid span of rafters and are supported by posts. Under purlins were typically propped off internal walls. With this layout the upper level which is typically framed construction rather than log the ceiling slash roof can use rafters and purlins to add log elements.

Whether a log home or outbuilding for personal use or a majestic hotel or visitors center for a national park most log buildings share one of two roof structures purlin or rafter. Roof systems precision joinery sets our log and timber roof systems apart from the rest. Metal roof purlins are installed horizontally under metal roofs. Purlin plates in wooden construction.

Last week you learned that members of a beam purlin roof system are both exposed and structural. Our machinery can produce logs up to 32 in diameter. All of our roof systems are standard with r 38 insulation. For example an 8 x 4 under purlin would support the center of a row of 6 x 2 rafters that in turn would support 3 x 2 roof purlins to which the roof.