I am working on a wood framed project where the architect wants to have a
5'-0" eave overhang. Roof is a 3:12 pitch. The main roof framing members
are prefab wood trusses @ 2'-0" on center. I was looking at using Doug-Fir
No. 2 lumber. For a 2x6, using Cd=1.25 and Cf=1.3 I calculate an allowable
moment of 896 ft.-lbs. My concern is with a roofer during construction, or
renovation. The roofing material will be metal roofing. Using this design
moment the maximum weight of a roofer standing out at the edge of the eave
would be about 180 pounds. I don't think this is enough capacity for a
roofer (please nobody take this personally).
I can fiddle with the Cd value to a higher number, since the duration of
Cd=1.25 is 7 days, but I don't gain a lot.
What has been the experience of others on the list? Anybody design a 5'-0"
eave? Anybody do it with a 2x6? What should I specify as loading for the
truss manufacturer. I need to stick frame some of the eave at various
locations. Any recommendations for or against using a 2x6 and hoping the
roofer is not too heavy?