Early 20th century Row House Sally Ports
Early 20th century Row House Sally Ports
(OP)
Subject: The masonry walls which form sally ports between row homes...The masonry is built to arch up to the shared masonry party wall above, right? I just can't see how the 2nd floor wood joists span across the sally port to support the masonry walls above. Someone is trying to tell me differently, and I am doubting myself. The sally port clear width is usually 24" - seems reasonable to be able to corbel the masonry above.
Sketch attached to help out.
Sketch attached to help out.






RE: Early 20th century Row House Sally Ports
Not sure what you mean about the joists carrying the wall. The wall is self supporting through arching (and/or possibly a permanent or temporary form lintel built into the arch). The joists is pocketed in there, but the wall is supporting the joist rather than the other way around.
RE: Early 20th century Row House Sally Ports
Mike McCann, PE, SE (WA)
RE: Early 20th century Row House Sally Ports
BA
RE: Early 20th century Row House Sally Ports
Sorry for the confusion, though. My question is more general about this type of construction, and the sketch is for a specific court case, deposition, arbitration, etc. etc. (not sure what is going to happen yet). In this case, the residence to the right has been razed some time ago. Based on the dimensions taken, I agree there is no way that it couldn't be a corbeled arch-like system. But, I was curious if anyone has seen joist framing cantilevering to pick up the party wall. The idea sounds like a very poor construction technique (load-carrying, deterioration, etc.), but I am always surprised by what I find all the time!
RE: Early 20th century Row House Sally Ports
RE: Early 20th century Row House Sally Ports
RE: Early 20th century Row House Sally Ports
RE: Early 20th century Row House Sally Ports
BA
RE: Early 20th century Row House Sally Ports
Is, or are there any horizontal steel ties? Or...do the joists continue through the wall with metal connecting straps? If there is either, then there is more of a beam effect and less of the arch effect.
Mike McCann, PE, SE (WA)
RE: Early 20th century Row House Sally Ports
I have no idea about the detailing performed on that wall when the adjacent building was razed. Finishes interfere with checking for a positive joist-wall connection at the arch. I wish I had this book on hand (http://books.google.com/books/about/Structural_Ana...). A colleague of mine owns it and I looked at it a few years ago, and was very impressed by the quantity of "historic" construction details.
RE: Early 20th century Row House Sally Ports
Mike McCann, PE, SE (WA)
RE: Early 20th century Row House Sally Ports