Log Purlin Roof Construction

100 of the bearing surface is in contact at the member connection.

Log purlin roof construction.

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

The term plate means a major horizontal supporting timber. Purlins are 2 by 4 feet and are installed much like metal roofing. Roof systems precision joinery sets our log and timber roof systems apart from the rest. Metal roof purlins are installed horizontally under metal roofs.

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. They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Last week you learned that members of a beam purlin roof system are both exposed and structural. 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.

Our machinery can produce logs up to 32 in diameter. Depending on the design of your log cabin our home timberhaven has four roof options from which you may choose. A purlin plate in wood construction is also called an arcade plate in european english under purlin and principal purlin. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.

Let s take a closer look at this particular roof system along with some other roof options. Beam purlin 6x8 rafter 2x cathedral and pre fab truss. For accuracy and tight fit these trusses cannot be matched. We can supply logs or timbers for trusses purlins posts and floor joists.

Purlin plates are beams which support the mid span of rafters and are supported by posts. Under purlins were typically propped off internal walls. All of our roof systems are standard with r 38 insulation. In lightweight timber roof construction under purlins were used to support rafters over longer spans than the rafters alone could span.