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Rabbit12, Thanks for the feedback. Yes, Winward drift is the concern I should have mentioned that. The 20' requirement seems to apply for both windward or leeward. However, my situation does not seem to be addressed. Pulling it off the building a bit more may be the way to go to avoid drift.

flight7, Thank you for the information I will review the ASCE commentary. I agree with your thoughts on the gap being bridged.

I have a design problem where a new decorative wall is being placed in front of an existing building. To prevent snow from drifting on the existing roof, there was a thought about pulling the wall off and away from the existing building and providing a gap. But with only a 1' gap between the...

JAE, Thanks for sending over the links for the documents it seems to be similar to what is shown on page 4 figure 1.

jayrod12, Thanks for the advice. I have looked through the slideruleera.net site with no luck yet. But will keep at it, hoping to come across something. Thanks, John

I have come across a roof system that looks to use a fabric and wire type of mesh draped between open web joist spaced roughly 2'-6" O.C. I am having trouble finding any information on this type of system and was posting this to see if anyone can provide information on this system. I have...

KootK Thank you for the link to the design example. I started reading through it this morning and will be adding it to my library a great reference document. This existing building I'm working on will be getting a lot of bracing added to it that is for sure. Thanks again for the help!!

KootK Thank you for the response and information you have provided, along with the link to the article. I have updated my post to include a sketch thanks for that suggestion.

I'm doing an analysis on an existing building that uses cantilever construction. The girders run over the columns and cantilever. Between the two cantilevers there is a simply supported beam. The roof joist run over the top of the girder cantilever and then there is a simply supported beam that...