Cee Purlin lengths are cut to length from 6′-45′ in 1/8″ increments, though 20′ and 25′ are the most commonly chosen lengths.
How thick should a purlin be?
Purlins are 2” think wooden strips, which are laid on edge, while laths are up to 1” thick and are laid flat. Purlins should be preferably 2" x 2" or 2" x 3" rough. 1" x 3" purlins are inadequate; their use should be discontinued.
How far can 2x4 purlins span?
2x4 purlins may also be nailed on top of the rafters with one 60-d nail or attached with metal clips at each rafter. Rafters may be spaced up to twelve feet, dependent on purlin size, when purlins are turned edgewise.
What size should roof purlins be?
Purlins should be preferably 2" x 2" or 2" x 3" rough.
What size do purlins come in?
Purlin Sizes Purlins are typically anywhere from 4” up to 12” with a flange width of 1-½” up to 4”.Mar 31, 2021
How far apart are purlins on a roof?
The purlin are ultimately used to fasten the roof steel providing a diaphragm effect, along with the siding, when properly engineered and installed. Spacing is typically 24″ on center in low snow loads and is reduced based upon truss span and snow load.
What sizes do purlins come in?
Metal purlins are offered in 12 gauge, 14 gauge, and 16 gauge.Mar 31, 2021
How far can you span with C purlin?
As far as the cee purlin goes. 6" will span up to 18' bay spacing, 8" up to 25', 10" from 25'-30'. As far as spacing between purlin, again, in west Texas 5' is the max, I usually run mine closer to 4'. to achieve the 30# snow load, might be closer to three.Dec 15, 2011