For wood framing it can be 16", 19 1/4" or 24 " on center.
Rafters are usually on 2 ft. centers.
Rafters are 16" on center. Trusses are 24" on center. Or 450mm & 600mm australia
23
The frame should be checked prior to the rafters going on. Once the roof is on , you will just have to deal with what you have. The horse is out of the barn...
You still need to indicate the pitch, the roof sheathing, and the shingle weight.
Rafters are usually on 2 ft. centers.
Rafters are 16" on center. Trusses are 24" on center. Or 450mm & 600mm australia
This will depend on many things including:the spacing between the rafters;the spacing between the studs;the pitch of the roof;the wind zone;the type of fixings being used; andthe span of the rafters.Contact your local authority or a competent local builder or architect regarding what can be done in your area.
no
You can see the rafters of the roof very clearly here.
At the peak of the roof where the rafters meet instead of the rafters meeting each other, there is a beam between them that they rest against. It runs the length of the roof peak.
in need of rafters on my roof,before i can have it weatherized
A purlin is a structural part of a roof which is used to support rafters and carry the roof cladding By supporting the rafters they allow for longer roof spans to be created allowing for wider buildings to be created.
A longitudinal member in a roof frame, usually for supporting common rafters or the like between the plate and the ridge. One of several horizontal timbers supporting the rafters of a roof. http://www.bw-industries.co.uk/roof-purlins.htm
A longitudinal member in a roof frame, usually for supporting common rafters or the like between the plate and the ridge. One of several horizontal timbers supporting the rafters of a roof. http://www.bw-industries.co.uk/roof-purlins.htm
The question must 1st be asked is "what spacing do you plan to use?" Local codes will apply of course. Up North spacing is closer than that of the South because of snow loads. 16 inches on center is a good number to use. You said rafters but I wonder if you meant trusses. Another problem with answering the question is the roof design. For a ranch style house you would simply multiply the length in feet by 3 and then divide that by 4 and add one for the end this will give you the number of trusses you need. For rafters you need to multiply your number by 2 and add 4 for the barge rafters.
Poplar.