Shelf Angles for Masonry Veneer
Publication: Journal of Structural Engineering
Volume 115, Issue 3
Abstract
Inadequacies of design, construction, and maintenance associated with shelf angles supporting masonry veneer on structural frames often cause spalling, cracking, and staining of masonry veneer; yielding and slipping of shelf angles; and leakage of wind‐driven rain, which in turn causes corrosion; volume change of materials; freeze‐thaw damage; destructive cryptofluorescence; increased heat transmission; deterioration of interior finishes and building contents; tenant inconvenience; and litigation. In the absence of an expansion joint between the horizontal leg of the shelf angle and the top of the masonry below the angle, differential movement between the building frame and the masonry veneer may lift the shelf angle vertically in a wedge insert in a concrete frame. Mortar rather than sealant in the joint at the toe of the shelf angle and improper shimming of the angle often result in spalled masonry. Shelf angle corrosion may be accelerated by inadequacies in masonry construction, condensation due to exfiltration of interior air, and improper angle protection. Dimension of masonry overhang beyond the toe of the shelf angle is critical.
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References
1.
Bažant, Z. P. (1979). “Physical model of steel corrosion in concrete sea structures—Theory.” J. Struct. Div., ASCE, 1139.
2.
Building code requirements for engineered brick masonry. (1964). Brick Institute of America, Reston, Va.
3.
Code of standard practice for steel buildings and bridges. (1976). American Institute of Steel Construction, Inc., Chicago, Ill.
4.
Cutler, J. F., and Mikluchin, P. T. (1965). Clay masonry manual. Brick and Tile Institute of Ontario, Willowdale, Ontario, Canada, 59, 147.
5.
Dial, S. A. (1982). “Time‐dependent and corrosion deformation behavior of masonry wall panels with embedded steel plates,” thesis presented to the University of Texas, at Austin, Tex., in partial fulfillment of the requirements for the degree of Master of Science.
6.
Grimm, C. T. (1982). “Water permeance of masonry walls—A review of the literature.” Masonry: Materials property and performance, ASTM STP 778, American Society for Testing and Materials, Philadelphia, Pa., 178–199.
7.
Grimm, C. T. (1985). “Corrosion of steel in brick masonry.” Masonry: Research, applications, and problems, STP 871, American Society for Testing and Materials, Philadelphia, Pa.
8.
Grimm, C. T. (1986). “Probabilistic design of expansion joints in brick cladding.” Proc. 4th Canadian Masonry Symp., Univ. of New Brunswick, 1, 553–568.
9.
Hilti fastening systems. (1984). Hilti, Stamford, Conn.
10.
ITT phillips drill division. (1984). ITT, Michigan City, Ind.
11.
Manual of steel construction. (1980). American Institute of Steel Construction, Inc., Chicago, Ill., 5–211.
12.
Monk, C. B., Jr. (1980). “Masonry facade and paving failures.” Proc. of the Second Canadian Masonry Conference, University of Ontario, 469–480.
13.
Parise, C. J. (1982). “Shelf angle component considerations in cavity wall construction.” Masonry: Materials, properties, and performance, ASTM STP 778, American Society for Testing and Materials, Phila., Pa., 147–170.
14.
“Recommended practice for concrete formwork.” (1983). Report No. ACI 347‐78, American Concrete Institute, Detroit, Mich.
15.
Salmon, C. G., and Johnson, J. E. (1980). Steel structures, design and behavior. Harper and Row Publishers, Inc., New York, N.Y., 390.
16.
Sealants—The professionals' guide. (1984). Sealant and Waterproofers Institute, Glenview, Ill.
17.
Seely, F. B., and Smith, J. O. (1952). Advanced mechanics of materials. 2nd Ed., John Wiley and Sons, Inc., New York, N.Y.
18.
Shelf angle wedge insert. (1984). Heckman Building Products, Inc., Chicago, Ill.
19.
Slotlok self locking adjustable fasteners. (1988). Holtz Corp., Northford, Conn.
20.
Specifications for the design, fabrication, and erection of structural steel for buildings. (1978). American Institute of Steel Construction, Chicago, Ill.
21.
Stainless steel cold‐formed structural design manual. (1974). American Institute of Steel Construction, Chicago, Ill.
22.
Stainless steel fasteners—A systemic approach to their selection. (1976). American Iron and Steel Institute, Washington, D.C.
23.
Stainless steel stone anchors (1975). American Iron and Steel Institute, Washington, D.C.
24.
Structural steel lintels. (1981). “Technical notes on brick construction.” Report No. 31B, Brick Institute of America, Reston, Va.
25.
Winkler, E. M. (1975). Stone—Properties, durability in man's environment. Springer‐Verlag New York, Inc., New York, N.Y.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 115 • Issue 3 • March 1989
Pages: 509 - 525
Copyright
Copyright © 1989 ASCE.
History
Published online: Mar 1, 1989
Published in print: Mar 1989
Authors
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