// CODE SNIPPET
2109.2 Lateral Stability
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In each direction in which shear walls are required for lateral stability, shear walls shall be positioned in two separate planes. The minimum cumulative length of shear walls provided shall be 0.4 times the long dimension of the building. Cumulative length of shear walls shall not include openings or any element with a length that is less than one-half its height.
Masonry shear walls shall be spaced so that the length-to-width ratio of each diaphragm transferring lateral forces to the shear walls does not exceed the values given in Table 2184.108.40.206.
|FLOOR OR ROOF DIAPHRAGM CONSTRUCTION||MAXIMUM LENGTH-TO-WIDTH RATIO OF DIAPHRAGM PANEL|
|Metal deck with concrete fill||3:1|
|Metal deck with no fill||2:1|
The roof construction shall be designed so as not to impart out-of-plane lateral thrust to the walls under roof gravity load.
Dry-stacked, surface-bonded concrete masonry walls shall be of adequate strength and proportions to support all superimposed loads without exceeding the allowable stresses listed in Table 2220.127.116.11. Allowable stresses not specified in Table 218.104.22.168 shall comply with the requirements of ACI 530/ASCE 5/TMS 402.
|DESCRIPTION||MAXIMUM ALLOWABLE STRESS (psi)|
|Compression standard block||45|
For SI: 1 pound per square inch = 0.006895 MPa.
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