![]() allowable tensile stress in reinforcement, F s, is 24,000 psi (165 MPa),.maximum width of compression zone is six times the wall thickness (where reinforcement spacing exceeds this distance, the ability of the plain masonry outside the compression zone to distribute loads horizontally to the reinforced section was verified assuming two-way plate action),.modulus of elasticity of masonry, E m, is 1,350,000 psi (9,308 MPa),.reinforcement yield strength, f y, is 60,000 psi (414 MPa),.specified compressive strength of masonry, f’ m, is 1,500 psi (10.3 MPa),.section properties are based on minimum face shell and web thicknesses in ASTM C 90 (ref.wall is grouted only at reinforced cells,.wall is simply supported at top and bottom,.no surcharges on the soil adjacent to the wall and no hydrostatic pressure,.Tables 2 through 4 are based on the following: The effective depths of reinforcement, d, (see Table notes) used are practical values, taking into account variations in face shell thickness, a range of bar sizes, minimum required grout cover, and construction tolerances for placing the reinforcing bars. (203, 254 and 305-mm) thick walls, respectively. Tables 2, 3 and 4 list reinforcement options for 8, 10 and 12-in. Additional reinforcement alternatives may be appropriate and can be verified with an engineering analysis. ![]() 1) and therefore meet the requirements of the International Building Code even though the latter limits reinforcment spacing to 72 in. Tables 2 through 4 of this TEK have been rationally designed in accordance with the allowable stress design provisions of Building Code Requirements for Masonry Structures (ref. Where these conditions cannot be met, the wall must be engineered using either an allowable stress design (see following section) or strength design procedure (see ref.
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