Yep, the majority of GC’s are paper contractors…most are relying on their subcontractors and the building inspectors to catch any mistakes. ![]() I have yet to find anyone in the south who is worth their salt when it comes to framing (nothing personal to my southern friends). I will say that the best carpenters I have had work for me were always from the north…typically around the New England area… those guys were pretty sharp. When I hired people for framing one of the main criteria as to determining what they knew was simply taking a framing square and ask them to explain everything on it to me…the majority of the time they said they never noticed all the data that was on a framing square…if they got past that I would have them calculate the rise and run for steps…if they could do all that then I started them off at $20.00 per hour…however more often than not I ended up taking the younger guys who did not have bad habits and train them…it was a whole lot less headaches for me. I also carry a Framer’s Bible in the truck… great little book. The span of each rafter shall be measured along the horizontal projection of the rafter. For other grades and species and for other loading conditions, refer to the AWC STJR. I just like to do it like the engineer wants and then tell him he _ucked up. Spans for rafters shall be in accordance with Tables R802.5.1(1) through R802.5.1(8). Plus we are not Code inforcers or engineers right.? This chapter covers wood floor framing, wood floors on the ground, cold-formed steel floor framing and concrete slabs on the ground. Chapter 8 also provides requirements for the application of ceiling finishes, the proper ventilation of concealed spaces in roofs (for example, enclosed attics and rafter spaces), unvented attic assemblies and attic access. ![]() One would be surprised how much load a framing member or roof member can carry before failure. Allowable span tables are provided to simplify the selection of rafter and ceiling joist size for wood roof framing and cold-formed steel framing. This is way beyond the duties per the SOP anyways, but always fun talking about it. and 10 is used or 20.Ĭonsidering the safety factor on dead loads and live loads, framing would have to be very deficient structurally before I make note or recommend an SE which I never do anyways. ![]() The dead weight or dead load on the average of a standard roof is about 6.3 lb.'s. Slopes Less Than 4:12, Lightweight Roofingĭead Load = 10 psf, Live Load = 20 psf (Residential)ĭouglas Fir - Larch Framing, Deflection of L/240 maximum.Īllowable Spans for Douglas Fir Roof Rafters Size of Just pulled one out for chits and giggles and it is different than the IRC. Span charts off the Internet are all different and to many variables to deal with.
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