![]() When it comes to analyzing the stresses in the rafters, it is not just calling bending the critical factor before failure. Put in more of these at lower heights and you can get away with a lighter rafter, effectively. That effectively reduces the length of the rafter as a beam carrying load. However, under loads the rafter tends to sag and this puts the tie into compression. The writer gives these collar ties a function of tension in case of uplift. Here is an explanation that I don't agree with. I agree with JAE's three options as stated in his post above.īA RE: Collar + Rafter Ties Roof Framing - No Load Bearing walls needed, right? msquared48 (Structural) 21 Apr 20 09:02 The type of wood would not change the fact that a 2圆 cannot span 26'. It is quite possible that the existing roof could support the existing ceiling by means of wire or wood hangers, but this would rely on competent nailing and splicing of the bottom ties (ceiling joists), which may or may not be the case. I do not know the type of wood the rafter ties/ceiling joists are made from-perhaps I can look for a marking.I believe you are correct in the two comments highlighted in yellow. ![]() ![]() The spanned length is somewhere around 25'. ![]() I'm fairly confident it's not needed except possibly to support the ceiling drywall and plaster. There is an interior wall but believe it is non-load bearing and in-place to provide space for more kitchen cabinets, refrigerator, and oven. ![]()
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