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// CODE SNIPPET

[BS] A111.4.5 Diaphragm Openings

Los Angeles Existing Building Code > A Guidelines for the Seismic Retrofit of Existing Buildings > A111 Special Procedure > A111.4 Wood Diaphragms > A111.4.5 Diaphragm Openings
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  1. Diaphragm forces at corners of openings shall be investigated and shall be developed into the diaphragm by new or existing materials.
  2. In addition to the demand-capacity ratios of Section A111.4.2, the demand-capacity ratio of the portion of the diaphragm adjacent to an opening shall be calculated using the opening dimension as the span.
  3. Where an opening occurs in the end quarter of the diaphragm span, the calculation of vuD for the demand-capacity ratio shall be based on the net depth of the diaphragm.

Related Code Sections


A111.4.5 Guidelines for the Seismic Retrofit of Existing Buildings, Diaphragm Openings
Diaphragm forces at corners of openings shall be investigated and shall be developed into the diaphragm by new or existing materials. In addition ...
Los Angeles Existing Building Code > A Guidelines for the Seismic Retrofit of Existing Buildings > A111 Special Procedure > A111.4 Wood Diaphragms > A111.4.5 Diaphragm Openings
A111A.5 Guidelines for the Seismic Retrofit of Existing Buildings, Diaphragm Openings
Diaphragm forces at corners of openings shall be investigated and shall be developed into the diaphragm by new or existing materials. In addition ...
Los Angeles Existing Building Code > A Guidelines for the Seismic Retrofit of Existing Buildings > A111 Special Procedure > A111.4 Wood Diaphragms > A111A.5 Diaphragm Openings
506.4 Exhaust Systems, Explosion Venting
Ducts conveying explosive dusts shall have explosion vents, openings protected by anti-flashback swing valves, or rupture diaphragms. Openings ...
Los Angeles Mechanical Code > 5 Exhaust Systems > 506.0 Product-Conveying Ducts > 506.4 Explosion Venting
506.6 Exhaust Systems, Explosion Venting
Ducts conveying explosive dusts shall have explosion vents, openings protected by anti-flashback swing valves, or rupture diaphragms. Openings ...
Los Angeles Mechanical Code > 5 Exhaust Systems > 506.0 Product-Conveying Ducts > 506.6 Explosion Venting
1901A.5 Concrete, Construction Documents
if slab on grade is designed as a structural diaphragm. Openings larger than 12 inches (305 mm) in any dimension shall be detailed on the structural ...
Los Angeles Building Code > 19A Concrete > 1901A General > 1901A.5 Construction Documents
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