Joist connection to masonry wall--eccentricity
Joist connection to masonry wall--eccentricity
(OP)
If attaching a joist to the side of a CMU wall, via a shelf angle, what is the eccentricity? In other words, how far from the vertical face of wall is it to the effective point load of the joist reaction? Assume I'm using a 4" horizontal leg: do I assume the reaction to be centered (2" out)? I've heard of people assuming a triangular stress distribution, which would move it out to 2/3 the horizontal dimension. Specifically, I'm trying to select anchors for the joist support, and I'm analyzing the shear/tension interaction. Thank you in advance.






RE: Joist connection to masonry wall--eccentricity
RE: Joist connection to masonry wall--eccentricity
Secondly, I think your analysis seems reasonable. I would take the centroid of the reaction at the 2 inch from the face of the masonry wall. This would make your eccentricity (e) = 1/2 CMU block width plus 2 inches. I do not think you find much argument from anyone.
Third, make sure to consider the overturning on the wall due to this eccentricity.
Fourth, I agree with archeng59 regarding the flexure in the angle leg.
Good luck
Regards,
Lutfi
RE: Joist connection to masonry wall--eccentricity
Highly recommended.
Hopefully it helps you
Rarebug