Post And Perlin Log Roof

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.

Post and perlin log roof.

By supporting the rafters they allow longer spans than the rafters alone. Purlin plates are beams which support the mid span of rafters and are supported by posts. Adding purlins between heavy timber trusses is an elegant way to reduce the cost of a timber frame roof because purlins permit an increased on center distance between trusses so you purchase fewer trusses. 5 htm high thermal mass passive solar house plan roof details complete with log purlin notes and low tech vented cold roof sips panel design considerations for the do it yourselfer passive solar roof details do not have to be unique but cold vented roof design with vented sips panels and layered insulation is a natural with log purlins.

The term plate means a major horizontal supporting timber. Hi all i have some hopefully quick questions about loads on roof members. 100 of the bearing surface is in contact at the member connection. Purlin plates in wooden construction.

I was confirming my intentions of building a hansen designed structure. Available in cee or zee shape red oxide primed or galvanized 16 14 or 12 gauge sizes from 4 up to 12 flange widths of 1 1 2 up to 4 cut to your specified lengths hole punching available load tables available for all material. The reason is i already have a permit for a building that i was designing and building myself. I understand that if you have a structural ridge pole and your rafters clear span between the ridge pole and the plate logs on the walls then your ridge pole is supporting 50 of the roof and your plate logs support the other 50 or 25 the weight on each wall.

A common arrangement is a rafter and purlin system which combines purlins and rafters. Roof systems precision joinery sets our log and timber roof systems apart from the rest. Our machinery can produce logs up to 32 in diameter. Engineered purlin metal mart offers a complete line of engineered purlin material.

The inspector asked about the type of wood being used as purlins. 2 6 roof loft decking 5 4 cedar decking and more. I explained the layout of roof trusses and purlins on your building design. For accuracy and tight fit these trusses cannot be matched.

An added benefit are the strong lines that purlins create by running parallel to the ridge beam s. Timber frame truss and purlins. One of my questions was about snow loads.