hurricane ties

[ugabulldog]

On one side of my building the main rafters tie into (and are nailed to) the lean-to rafters at the top plate. So on this side of building the main rafters have no overhang (cut flush with outside wall). Is it better to attach hurricane ties to main rafters, lean to rafters (or does it matter), or both? I would rather not do both if it is overkill and not needed by IRC or necessity. Located in Ga. Thanks.

[Don_P]

I'm assuming the main rafters sit on the top plate, these need hurricane ties. Then I'm assuming the lean to rafters alongside of the main rafters and are nailed into the main rafters... if so then they share the uplift protection provided by the main rafter hurricane tie... technically do the uplift math and make sure the tie has that kind of capacity. Then, the outboard end of the lean to rafter needs a hurricane tie down to its' bearing, the porch beam or wall that it is landing on at its' bottom end. If it is a porch carry beam, keep following that uplift restraint down. The porch posts need to be well tied to the carry beam, the bottoms of the posrch posts need to be tied well to the foundation. If it is a wall out there the sheathing is tied to the plate, studs, rim and mudsill and the sill is bolted to the foundation. Basically think of wind trying to suck the roof off of its' bearings or getting under a porch ceiling and trying to throw the roof, shackle it down to the foundation with an adequate "continuous load path".