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Masonry Deflection Criteria For OUT-OF-PLANE Bending
- Thread starter Gilbertl
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Thanks, and although your response is correct for my question "any year", the IBC has ommitted that portion of the code in the subsequent editions; The masonry project I'm currently working on is governed by the 2006 IBC, which, like the 03 edition references to ACI 530, ASCE 5 and TMS 402. The only help I've found from these references is L/600 or 0.3" max., which as explained, I interpret as being applicable for the design of lintel or other structural members supporting masonry gravity loads.
Note F, from table 1604.3 minimizes offers some relief from the stringent L/600 criteria, but even L/420 (.7 x L/600) for out of plane deflections seems a bit excessive.
Thanks again, and I'm still reading up on the matter.
Note F, from table 1604.3 minimizes offers some relief from the stringent L/600 criteria, but even L/420 (.7 x L/600) for out of plane deflections seems a bit excessive.
Thanks again, and I'm still reading up on the matter.
SteveGregory
Structural
We always use L/600 for out of plane bending when we design steel stud backup for brick masonry. The same goes for deflection of building girts providing lateral support for the studs/masonry wall.
Building drift is another matter. For drift, you could use L/240 from IBC2003 Table 1604.3 for "Exterior walls and interior partitions:
With brittle finishes" and modify the wind loading by 0.7 per footnote F. However, we use L/360 with service loads (0.7 or 0.75) for drift.
Building drift is another matter. For drift, you could use L/240 from IBC2003 Table 1604.3 for "Exterior walls and interior partitions:
With brittle finishes" and modify the wind loading by 0.7 per footnote F. However, we use L/360 with service loads (0.7 or 0.75) for drift.
DaveAtkins
Structural
I use L/360, based on testing done at Clemson University in the 1980's. Brick is very flexible out of plane.
DaveAtkins
DaveAtkins
NITTANYRAY
Structural
BIA Technical Notes 28B revised.
"brick veneer/steel stud walls" states:
"The allowable out of plane deflection of studs should be restricted to L/600 using service loads."
This is to reduce cracking and water penetration.
Brick Industry Association is in Reston, Va.
"brick veneer/steel stud walls" states:
"The allowable out of plane deflection of studs should be restricted to L/600 using service loads."
This is to reduce cracking and water penetration.
Brick Industry Association is in Reston, Va.
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