// CODE SNIPPET
2109.2 Lateral Stability
JUMP TO FULL CODE CHAPTER
Where the structure depends upon masonry walls for lateral stability, shear walls shall be provided parallel to the direction of the lateral forces resisted.
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 2109.2.1.2.
FLOOR OR ROOF DIAPHRAGM CONSTRUCTION | MAXIMUM LENGTH-TO-WIDTH RATIO OF DIAPHRAGM PANEL |
Cast-in-place concrete | 5:1 |
Precast concrete | 4:1 |
Metal deck with concrete fill | 3:1 |
Metal deck with no fill | 2:1 |
Wood | 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 2109.2.3.1. Allowable stresses not specified in Table 2109.2.3.1 shall comply with the requirements of ACI 530/ASCE 5/TMS 402.
DESCRIPTION | MAXIMUM ALLOWABLE STRESS (psi) |
Compression standard block | 45 |
Flexural tension | |
Horizontal span | 30 |
Vertical span | 18 |
Shear | 10 |
For SI: 1 pound per square inch = 0.006895 MPa.
Related Code Sections
2109.2 Masonry, Lateral Stability
Where the structure depends upon masonry walls for lateral stability, shear walls shall be provided parallel to the direction of the lateral forces ...
2109.2.3.1 Masonry, Strength
Dry-stacked, surface-bonded concrete masonry walls shall be of adequate strength and proportions to support all superimposed loads without exceeding ...
2010 Building Code of NY > 21 Masonry > 2109 Empirical Design of Masonry > 2109.2 Lateral Stability > 2109.2.3 Surface-Bonded Walls > 2109.2.3.1 Strength
2109.2.3.2 Masonry, Construction
Construction of dry- stacked, surface-bonded masonry walls, including stacking and leveling of units, mixing and application of mortar and curing ...
2010 Building Code of NY > 21 Masonry > 2109 Empirical Design of Masonry > 2109.2 Lateral Stability > 2109.2.3 Surface-Bonded Walls > 2109.2.3.2 Construction
1808.2.5 Soils and Foundations, Stability
Piers or piles shall be braced to provide lateral stability in all directions. Three or more piles connected by a rigid cap shall be considered ...
2010 Building Code of NY > 18 Soils and Foundations > 1808 Pier and Pile Foundations > 1808.2 Piers and Piles-General Requirements > 1808.2.5 Stability
1810.2.2 Soils and Foundations, Stability
Deep foundation elements shall be braced to provide lateral stability in all directions. Three or more elements connected by a rigid cap shall ...
Building Code 2015 of New York State > 18 Soils and Foundations > 1810 Deep Foundations > 1810.2 Analysis > 1810.2.2 Stability