Page 265 - Masonry and Concrete

Masonry Veneer

264 CHAPTER SEVEN

Number of
1
⁄2 or
Equivalent Lintel
Reinforcing Less Than Lintel Supporting
Bars in One Story Supporting Two Stories of
Size of Angle*† Masonry or of Masonry One Story of Masonry
For Steel Angle Concrete Above Masonry Above
Lintels Lintels‡ Lintel Above Opening Opening
1
3 3 ⁄4 1 6'-0" 3'-6" 3'-0"
1
4 3 ⁄4 1 8'-0" 5'-0" 3'-0"
1 1
6 3 ⁄2 ⁄4 2 14'-0" 8'-0" 3'-6"
two
1 1
6 3 ⁄2 ⁄4 4 20'-0" 11'-0" 5'-0"
*Long leg of angle shall be in vertical position.
†Steel members indicated are adequate typical examples. Other steel members meeting structural
design requirements may be used.
‡Depth of reinforced lintels shall not be less than 8 inches, and all cells of hollow masonry lin-
tels shall be grouted solid. Reinforcing Bars shall extend not less than 8 inches into the support.
FIGURE 7-14

Allowable lintel spans. (from Council of American Building Officials, One and Two-Family Dwelling Code, Falls
Church, VA).

required curvature. With standard brick the mortar joints are narrower
1
at the bottom than at the top, but should be a minimum of 4 inch. Units
laid in a soldier course will have a more pronounced variance in the
joint thicknesses. Two or more courses of rowlocks can be more attrac-
tive, particularly with arches of relatively short span (Figure 7-19).
Although the shape and placement of each unit are most important
in the structural stability of an arch, mortar keeps the units from slid-
ing, and it is especially important that the mortar joints be completely
filled. It can be difficult to achieve full joints in soldier courses
because the mortar tends to slump toward the bottom of the joint as the
unit is placed. Full mortar joints are easier to achieve with rowlock
courses. Mortar can be omitted from the bottom of the arch during con-
struction and tuckpointed after the centering is removed. This will
help avoid stains on the bottom brick surfaces and will also make it
possible to tool the bottom joints properly. A wooden dowel of the

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