METAL ROOF RAFTERS SPACING FULL

You can lay one-by-4 inch pine boards lengthwise two feet apart on your roof and then attach them by using three-inch wood screws to attach each corner of the boards. Any gaps or unevenness in the boards can create problems with the metal roofing system. The most important thing to remember when laying out boards for a metal roof is to make sure that all of the boards are level and flush with each other. From there, the process of creating a layout for a metal roof is relatively simple and straightforward. If you buy the right SIPS which will span between your ridge pole and side wall you don't need rafters.Laying out boards for a metal roof is a process that begins with understanding the basic geometric shapes that make up a roof and the principles of basic roofing layout.

Most common spacing is 48' because LHBA members tend to use 2x decking between their exposed rafters and this works out well with the decking. If you're talking about having a ridge pole and log rafters rather than trusses, the spacing for 10' log rafters varies depending on your snow load and the species of log you are using. LHBA method doesn't settle as much so you don't need the jacking screws and installing a ridge pole is much easier for the layman than making and installing a log truss. Most of them also use purlins between the trusses to provide a middle support for the SIPs. Usually log trusses are used for asthetics and to combat log wall settling so you don't have to have center ridge poles and jacking screws. I wouldn't recommend trying to do it without engineering and plans for the log trusses unless you really like your roof sitting on your floor. Snow load for Minnesota.Īny log trusses would need specific engineering. Collar ties 1/2 way down from ridge beam. 8/12 pitch with SIP panels and metal roof. What distance should be used between roof trusses spanning 30' with 10' log material? Ridge beam will be 50'-16' log tied into log gable ends. my advice for 4' centers still holds however. I'd just use the poles, and not a truss system. I would recommend 12' or 16' tongue and groove over the top, or a mixture so as to produce a staggered roof effect (although ideally, all of your joints will end up on a truss) as far as building them to support the load, 10' poles of DF or even pine will likely carry the requisite snow load over quite a span (even 30'). Plus, with 4' spacing, you can pick up two with an 8' piece of lumber. 10' logs spaced much closer will not look good, and much further apart will result in inter-rafter bending of the roof panel. In that case, I'd go 4' OC and build your trusses to handle the snow load, whatever that may be.

I know of one member building a home now that has scissor trusses, and will still have an open feel and usable space in the peak.Įdit: I see you want to make your own trusses. We like the open Cathedral type ceiling and the commensurate usable space. Therefore the info I got from the local (county) office was of great interest.įor your information, LHBA does not generally recommend trusses. Not required, but we at LHBA generally overbuild significantly.

The county recommends (not requires) a higher snow load at elevations above 3000 ft. For instance, the snow load at my place is significantly higher because of elevation. Contact your local building inspector/planning office for local requirements. I assume that the load at Lake of the Woods is not the same as Worthington. If Minnesota is anything like Washington, the snow load can vary hugely across it.

METAL ROOF RAFTERS SPACING FULL

The load allowed varies by type (and type of wood, fastener type, etc.Ī 'scissors truss' will have a smaller rating than a full truss, all things being equal. The span rating should be on the manufacturers data.

Metal roof rafters spacing