Masonry Deflection Criteria For OUT-OF-PLANE Bending Masonry Deflection Criteria For OUT-OF-PLANE Bending Gilbertl (Structural) (OP) 21 Aug 07 10:30 Does anyone know where the out-of-plane masonry wall deflection criteria are specified or discussed in the code, i.e. ACI 530 (any year), or IBC (any year)?Any help will be greatly appreciated, thanks. RE: Masonry Deflection Criteria For OUT-OF-PLANE Bending JAE (Structural) 21 Aug 07 10:51 IBC 2000 section 2220.127.116.11 RE: Masonry Deflection Criteria For OUT-OF-PLANE Bending Gilbertl (Structural) (OP) 21 Aug 07 13:06 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. RE: Masonry Deflection Criteria For OUT-OF-PLANE Bending JAE (Structural) 21 Aug 07 13:41 If you find out something - do post it here in a follow up. RE: Masonry Deflection Criteria For OUT-OF-PLANE Bending SteveGregory (Structural) 21 Aug 07 18:57 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. RE: Masonry Deflection Criteria For OUT-OF-PLANE Bending DaveAtkins (Structural) 22 Aug 07 06:11 I use L/360, based on testing done at Clemson University in the 1980's. Brick is very flexible out of plane. DaveAtkins RE: Masonry Deflection Criteria For OUT-OF-PLANE Bending NITTANYRAY (Structural) 6 Nov 07 19:50 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.