Purlin spacing 23 75 in.
Roof purlin wood purlin size and spacing.
Spacing for purlins on a standard load most designs call for purlin placement at five foot intervals.
3 009 19 1 0019 1 5 12 in.
Net variation for combned dimension.
The standard of purlin length will vary anywhere between 100 to 300 mm while the thickness will vary anywhere between 1 to 3 mm.
For 2x4s purlins the posts are spaced in 4 feet distance.
For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap.
However engineering determines the optimal spacing between the purlins.
The typical spacing standards for residential and commercial buildings are about 1 to 2 foot.
15 3 12 in.
Ft 15 23 75 12 in.
Roof steel dead load 63 psf steel american building components catalogue.
Ft psf in purlin weight based on 43 g nds total purlin dead load 1 638 psf.
For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.
If you want to know how to support roof purlins they are usually supported by 2 4 or 2 6 struts or posts.
Roof lumber dead load 62 4 pcf 43 lbs ft.
7 25 12 in.
This is the distance between rafter centres.
3 1 43 lbs ft.