On Tuesday, August 23, 2016 at 8:43:43 AM UTC+1, fred wrote:
On Monday, August 22, 2016 at 7:29:50 PM UTC+1, Roger Mills wrote:
On 22/08/2016 12:51, fred wrote:
I wish to span 3.0m or thereabouts with galvanised corrugated sheeting. (Sheet size 3.0m x 0.6m) Three purlins, one top and bottom and one mid span. Pitch of about 5 degrees. What size rafter would I need and what spaceing ? (It's for a lean-to type shed Im comtemplating)

Does snow loading need to be taken into account?
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

Don't frighten me :-) I'll depend on global warming :-) Its only a small structure, I wouldn't be very concerned about it collapsing, more worrried about the wind taking it away.

Many thanks to all for all the suggestions. My two previous sheds had pitched roofs for which I made small trusses but this single span low pitch slope had me a bit worried.