2114.8 Additional Requirements for Allowable Stress Design
Modify by adding Section 8.1.7 as follows:
8.1.7 — Walls and piers.
Thickness of walls. For thickness limitations of walls as specified in this chapter, nominal thickness shall be used. Stresses shall be determined on the basis of the net thickness of the masonry, with consideration for reduction, such as raked joints.
The thickness of masonry walls shall be designed so that allowable maximum stresses specified in this chapter are not exceeded. Also, no masonry wall shall exceed the height or length-to-thickness ratio or the minimum thickness as specified in this chapter and as set forth in Table 2114.8.1.
Piers. Every pier or wall section which width is less than three times its thickness shall be designed and constructed as required for columns if such pier is a structural member. Every pier or wall section which width is between three and five times its thickness or less than one half the height of adjacent openings shall have all horizontal steel in the form of ties except that in walls 12 inches (305 mm) or less in thickness such steel may be in the form of hair-pins.
MINIMUM THICKNESS OF MASONRY WALLS1, 2
|TYPE OF MASONRY||MAXIMUM RATIO UNSUPPORTED HEIGHT OR LENGTH TO THICKNESS2, 3||NOMINAL MINIMUM THICKNESS (inches)|
|BEARING OR SHEAR WALLS:|
|1. Stone masonry||14||16|
|2. Reinforced grouted masonry||25||6|
|3. Reinforced hollow-unit masonry||25||6|
|4. Exterior reinforced walls||30||6|
|5. Interior partitions reinforced||36||4|
Modify the requirements of Section 2107.2.1 by adding the following:
Lap splices need not be greater than 72 bar diameters.