Brick Lintel Bolted to Wood Header
Brick Lintel Bolted to Wood Header
(OP)
I'm searching for information that provides guidance for attaching a steel lintel (bolting) to a wood (mico lam) header for large spans. I searched the IBC & NDS for restrictions but couldn't really find anything. I'm asking because I have a wood framed building with large window openings supporting brick veneer above and would like to keep all headers as wood.
TIA
TIA






RE: Brick Lintel Bolted to Wood Header
If the height of the brick is substantial enough, the arch action will reduce the load on the lintel.
Flash well!
Dick
RE: Brick Lintel Bolted to Wood Header
I would talk to an older, experienced Architect. This is one of those situations I will not handle without an Architect's advise. They need us, but we need them too; I think you might have one of those situations.
Good luck,
YS
B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...
RE: Brick Lintel Bolted to Wood Header
If you do use IBC 2006, you need to make sure the top and bottom of your MicroLam is restrained from rotating. I'd figure about 3" from the face of the beam to be added to 1/2 the width of the beam for eccentricity of the brick on a typical situation (1/2" sheating + 1/2" air gap + 2" centerline of brick).
RE: Brick Lintel Bolted to Wood Header
RE: Brick Lintel Bolted to Wood Header
DaveAtkins
RE: Brick Lintel Bolted to Wood Header
I rather use thru-bolts instead of lag bolt. Make sure you will have enough surface bearing area for the bolts.
RE: Brick Lintel Bolted to Wood Header
You'll need to look at your connection detail and use your engineering judgement on the torsion issue.
I don't think a typical Simpson-type joist seat has a positive enough connection into the upper-third of the joist to resist rotation. It would place the nails in withdrawal on a typical seat.
Also, as you stated "large span," the bottom of the joist may be near to the center of the LVL, as it would likely be a 16 or 18.
Personally, I'm with civilperson. I have never (knowingly) supported brick veneer with a wood member. I've always sized the angle to support the brick. You have to be careful about bearing pressure on the masonry.
RE: Brick Lintel Bolted to Wood Header
RE: Brick Lintel Bolted to Wood Header
Here in MA wood is a no-no... the only exception is for glass block. We don't use it because we can't, but I'm not sure I would if we could.
.02
RE: Brick Lintel Bolted to Wood Header
Under a sustained permanent load such as this creep is at its worst case, over time the timber will most likely deflect more than the code calculation gives.
Can you design the steel angle to take the full vertical load and provide blocking/bridging back to the floor beam to provide lateral restraint and take out the twist?
RE: Brick Lintel Bolted to Wood Header
For residential construction, I don't think creep is that large of an issue since the "arching action" of the brick will take over once the morter has cured and there are no control joints in the brick. Torsion is usually not considered although maybe it should be. The wood beam should be braced with a king stud on each end as a bare minimum. Most failures from this are ususally from workmanship and poor detailing of the connection of the lintel to the wood beam.
Although this does not mention brick per se, this is a good article for dropped beam headers that may be the cause of issues with wood beams supporting brick.
htt
RE: Brick Lintel Bolted to Wood Header
RE: Brick Lintel Bolted to Wood Header
Around here it is not allowed for commercial work (IBC). I believe it is allowed for residential (IRC)
RE: Brick Lintel Bolted to Wood Header
RE:
"....but it is up to the developer to specify the material they prefer if the code does not address the issue."
If this did go to court, this statement would not hold water. You as the engineer are the only one who 'should know better' if the code doesnt specifically cover the situation.
regards
csd