New punched openings in existing cmu.
New punched openings in existing cmu.
(OP)
I'm dealing with puting some new opens in both bearing and non-bearing cmu walls. The opens range from 6'-0" to 12'-0". Its obvious I need to provide a steel lintel and columns for the larger openings. My question is for the smaller opens. How much of the cmu wall next to the open can I use for the design in order to take the wind reaction from the new lintel. I do not know what the reinforcing is in the new wall. What are your thoughts?






RE: New punched openings in existing cmu.
I strongly recommend that you comply with this provision unless your local code does not require it.
Good luck
RE: New punched openings in existing cmu.
I should have been a little clearer about the cmu wall. It is an existing cmu wall and I don't know if the wall has any reforcing in it.
So, say I put a 3'-6" opening in the existing wall with a new lintel. How much of the existing wall (treated as unreinforced) adjacent to the opening can I use to take my wind reaction from the lintel? Wondering what people have done before?
Thanks for your help
RE: New punched openings in existing cmu.
I do not understand the question about wind load reaction from the lintel. Can you elaborate more?
Regards,
Lutfi
Lutfi
www.cdeco.com
RE: New punched openings in existing cmu.
Would it be possible to get those details from you? I'm sure adding vertical bars must be cheaper than adding vertical steel members. Does the reinforcing then get tied into the existing bond beam at bar joist bearing?
I guess what I was going to try to do for some smaller opens was use like a double angle lintel. I was going to put a point load on the non-rein. wall (wind reaction from lintel) and treat a portion of the wall as a non-reinforced beam spanning from the floor slab to the bond beam at joist bearing. I guess I was wondering how much of the wall I could use as the beam? I haven't run any numbers so I'm not sure if this design will even work.
Thanks alot Lutfi.
RE: New punched openings in existing cmu.
It's just another thought!