Brick Veneer Bowing Kalamazoo MI

This is fairly common in masonry veneer high-rise buildings in Kalamazoo where relieving angles are used without horizontal expansion joints. During construction, a small gap generally is left between the bottom of each relieving angle and the top of the brick below.

Giannola Masonry Co
(586) 792-2070
35086 Cordelia St
Clinton Township, MI
 
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(810) 742-2141
3829 Beechwood Ave
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Kennedy Masonry Inc
(517) 322-9310
6554 Sloan Hwy
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Milhiem Masonry
(616) 485-3740
1102 4th St Nw
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(586) 772-1660
25530 SchoenheRR Rd
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B & D Drywall Supply Inc
(586) 463-7774
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TheBrickMasters.com
(586) 246-7848
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R J Masonry
(517) 455-0099
1535 Linval St
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Rose Tile & Masonry
(734) 662-8004
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DAVE BUHLER MASONRY INC
(810) 639-1887
PO BOX 363
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Brick Veneer Bowing

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Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: July 1, 1993

On a 20-story brick-veneer building, the masonry is bulging and cracking at each relieving angle. The building has no horizontal expansion joints. Could the cracking result from brick expansion? What can be done?

This is fairly common in masonry veneer high-rise buildings where relieving angles are used without horizontal expansion joints. During construction, a small gap generally is left between the bottom of each relieving angle and the top of the brick below. As the masonry grows due to moisture and thermal expansion, the gap between the masonry and the shelf angle narrows. Mortar placed at the tip of the angle creates a solid bridge between the masonry above and below the relieving angle. This portion of the joint cannot compress. Resulting forces often cause bowing and spalling. Also look at tie placement. If the nearest ties are more than 12 inches above and below the relieving angle, bowing is more likely. Corrosion of the shelf angle also can cause bowing. Steelcorrosion products are larger than steel itself. This creates pressures that act on the wall similarly to moisture and thermal expansion. These problems are compounded if the building's frame shrinks over time as the masonry expands. Bowing and spalling can be prevented by leaving adequate space beneath each angle during construction. The size of these spaces depends on expected movement. Procedures for sizing joints are given in BIA Tec...

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