Lintel Detail - Brick and Masonry - Torsion on Lintel
Lintel Detail - Brick and Masonry - Torsion on Lintel
(OP)
I know there was a discussion on this in the past (trying to find this).
The situation is - where WF lintels are specified centered in the CMU wall and a plate extends to support the brick. The WF or Tube can be sized for torsion etc, but then the torsion needs to be taken out at bearing points into the masonry wall.
I've attached a quick sketch/detail that extends the plate below the brick, into the brick, to help resist this torsion. Is this a bad detail?
What other details are typically used when the torsion becomes somewhat large (what is somewhat large)? I suppose kickers could be used as well but they would need to restrain the moment/torsion.
The situation is - where WF lintels are specified centered in the CMU wall and a plate extends to support the brick. The WF or Tube can be sized for torsion etc, but then the torsion needs to be taken out at bearing points into the masonry wall.
I've attached a quick sketch/detail that extends the plate below the brick, into the brick, to help resist this torsion. Is this a bad detail?
What other details are typically used when the torsion becomes somewhat large (what is somewhat large)? I suppose kickers could be used as well but they would need to restrain the moment/torsion.






RE: Lintel Detail - Brick and Masonry - Torsion on Lintel
I would typically design the beam to handle the torsion, and the bearing to handle it as well. analyze the bearing and you may find that that the outside edge has lots of compression and the inner has less (not uplift) due to the dead weight of the system... then design the bearing plate and block accordingly... but may not work depends on the condition.
RE: Lintel Detail - Brick and Masonry - Torsion on Lintel
You could also use a tube section for the lintel beam instead of a W section.
Mike McCann
MMC Engineering
RE: Lintel Detail - Brick and Masonry - Torsion on Lintel
Gotta love brick veneer - Not!
RE: Lintel Detail - Brick and Masonry - Torsion on Lintel
We used to put it DBA's welded along the top of the WF beam also and extending into grouted cells in the CMU above.
RE: Lintel Detail - Brick and Masonry - Torsion on Lintel
I was thinking that the plate is only carrying the weight of the brick so extending it to bear on itself would be similar to a loose angle. It seemed simple enough to do, but maybe not. I would prefer kickers but it seems that so frequently this is not option due to ceiling elevation.
EIT
www.HowToEngineer.com
RE: Lintel Detail - Brick and Masonry - Torsion on Lintel
For many other applications we do what haynewp describes and use the wall above (its flexural strength and stiffness) to take out the torsion by linking the lintel to the wall.
Taking out the torsion at the beam support doesn't work well with WF beams as they have little torsional stiffness and unless you have a column at the end sufficiently connected to take out the torsion I hate to use the opening "jamb" sections of wall to take all the twist. - better to take it out along the length.