I am a structural engineer, but I did no math. Not the cheapest but I think it's the strongest of the options. Now the wall can span the piers on its own. RAFTER TIE A structural framing member located in the LOWER THIRD of the attic space that ties rafters together to RESIST THRUST from gravity loads on the roof. Non-typical fix: Clad the ridge wall with 3/8 ply turning it into a shear wall. Standard fix: If the joists are hangered to the beams it would be easy enough to run a triple joist below the wall, provided there is room to maneuver in the crawl space. Effectively reduces the span of the ridge board and makes it continuous, earning it the honorary title of "beam". Something needs to support the ridge to eliminate the need for ties.Ĭheap, easy, and probably good enough: Triple up the stud in the center of the wall over your beam that runs perpendicular to the ridge. I would assume that the joists then span parallel to the wall, and there may or may not be one directly underneath it. From another comment you said that the addition is on helical piers with three beams running perpendicular to the ridge/wall. A collar tie is a tension tie in the upper third of opposing gable rafters that is intended to resist rafter separation from the ridge beam during periods of unbalanced loads, such as that caused by wind uplift, or unbalanced roof loads from snow. The wall would serve the same purpose as a ridge beam provided there was adequate support below the wall. 'Collar ties' are defined in the International Residential Code (IRC) in Section R802.4. Looks like a ridge board, not a ridge beam (would need to be deeper, probably LVL for Ontario snow).
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