Lintel for openings at curved CMU wall
Lintel for openings at curved CMU wall
(OP)
does anybody have some experience in analysis of Lintels for CMU wall opening? The CMU wall is curved so the opening (about 6' wide) and lintel are also curved.
for straight walls, we have a schedule. But for curved lintel, it seems some torsion is introduced. How to design such lintel?
thanks.
for straight walls, we have a schedule. But for curved lintel, it seems some torsion is introduced. How to design such lintel?
thanks.






RE: Lintel for openings at curved CMU wall
The hard part is the anchorage so that it will not just roll off its bearing. I would suggest a column at each end up to the roof or floor above.
RE: Lintel for openings at curved CMU wall
If you are dealing with 10 or 12" block there should be no problem with placement issues, but there is definitely a problem with 6" block. I consider 8" CMU marginal as there is only roughly 5 1/4" of lateral void space for bent rebar and cover for bond.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Lintel for openings at curved CMU wall
Good suggestion Jike as tubes are great in torsion.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Lintel for openings at curved CMU wall
the wall is 8" CMU. the maximum centerline offset is only
1-3/4" (the middle of straight and the middle of curved at the opening), the curve radius is big, the curve is not so much.
The Architect said it is fire rated wall and he prefers the concrete lintel.
Any suggestions I need to do to anchor the beam to the wall at both ends?
Thanks.
RE: Lintel for openings at curved CMU wall
2. Use 2 or 3 inverted U shaped #4 bars at the ends extended down into the CMU column at each end of the lintel.
Depending on the load seen by the lintel, which may not be much at only a 6 foot span, I would not really be too concerned with the 1.75" overhang. I've seen a low worse.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Lintel for openings at curved CMU wall
RE: Lintel for openings at curved CMU wall
Happy Holidays!
RE: Lintel for openings at curved CMU wall
RE: Lintel for openings at curved CMU wall
RE: Lintel for openings at curved CMU wall
RE: Lintel for openings at curved CMU wall
RE: Lintel for openings at curved CMU wall
Sweet idea. I have to model structs like this, typically with more pronounced (out of plane) curvatures.
So do you mean shore up lintel during construction, and eventually tie your rod hangers (tension elements) into the bond beam above, with possible post-tensioning in some situations?
RE: Lintel for openings at curved CMU wall
The minor cases that I have seen more frequently have many times the ordinary steel structure built before the brick itself. Needs not even to be shored. If going for hanging rods, I would place some buttressing part ... for curved lintels (in plan) that would be less necessary but still convenient.
RE: Lintel for openings at curved CMU wall