Masonry Magazine September 1976 Page. 13
NCMA-TEK
An Information series from National Concrete Masonry Association
79
NATIONAL CONCRETE MASONRY
MA
Concrete Masonry Veneers
National Concrete Masonry Association
4 Concrete Units
Introduction
The variety of surface textures, colors, and patterns available today with concrete masonry units has resulted in their extensive use as an exterior facing material. In addition to their use structurally as through-the-wall units, or as the facing of composite and cavity walls, concrete brick and architectural facing units such as split, slump, and fluted block are used as veneer over various backing surfaces.
General Design
Veneer is nonstructural facing of brick, tile, concrete masonry units, metal, glass or other material securely attached to a wall or backing for the purpose of providing ornamentation, protection, or insulation. Backing surfaces to which veneers are attached consist of masonry, concrete, plaster, and wood or metal studs. Methods of attaching veneers are described as Anchored Veneer and Adhered Veneer.
For purposes of design, veneer is assumed to support no load other than its own weight plus the vertical dead load of the veneer above. Veneer is not assumed to add to the strength of the wall.
Although engineered design of veneer is permitted in most codes, lack of test data has resulted in prescriptive code requirements based on judgement and good experience. The prescriptive requirements relate to size and spacing
TEK 79 © 1976 National Concrete Masonry Association
Concrete
Masonry.
Veneer
1" air
space
Building
paper
Metal
ties
FIGURE 1.
Veneer Anchored
To Wood Studs
With Corrugated Ties
8d nails
(should
be located
where tie
is bent)
Interior
finish
2" x 4"
Studs
16" о.с.
Sheathing
8d nails