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// CODE SNIPPET

2508.6.1 Diaphragm Proportions

Building Code 2018 of Illinois > 25 Gypsum Board, Gypsum Panel Products and Plaster > 2508 Gypsum Construction > 2508.6 Horizontal Gypsum Board or Gypsum Panel Product Diaphragm Ceilings > 2508.6.1 Diaphragm Proportions
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The maximum allowable diaphragm proportions shall be 11/2:1 between shear resisting elements. Rotation or cantilever conditions shall not be permitted.

Related Code Sections


2508.6.1 Gypsum Board, Gypsum Panel Products and Plaster, Diaphragm Proportions
The maximum allowable diaphragm proportions shall be 1 1 / 2 :1 between shear resisting elements. Rotation or cantilever conditions shall ...
Building Code 2021 of Illinois > 25 Gypsum Board, Gypsum Panel Products and Plaster > 2508 Gypsum Construction > 2508.6 Horizontal Gypsum Board or Gypsum Panel Product Diaphragm Ceilings > 2508.6.1 Diaphragm Proportions
2508.6.1 Gypsum Board, Gypsum Panel Products and Plaster, Diaphragm Proportions
The maximum allowable diaphragm proportions shall be 1 1 / 2 :1 between shear resisting elements. Rotation or cantilever conditions shall ...
Building Code 2018 of Illinois > 25 Gypsum Board, Gypsum Panel Products and Plaster > 2508 Gypsum Construction > 2508.6 Horizontal Gypsum Board or Gypsum Panel Product Diaphragm Ceilings > 2508.6.1 Diaphragm Proportions
1604.4 Structural Design, Analysis
in proportion to their rigidities, considering the rigidity of the horizontal bracing system or diaphragm . Rigid elements assumed ...
Building Code 2021 of Illinois > 16 Structural Design > 1604 General Design Requirements > 1604.4 Analysis
1604.4 Structural Design, Analysis
elements. The total lateral force shall be distributed to the various vertical elements of the lateral force-resisting system in proportion ...
Building Code 2018 of Illinois > 16 Structural Design > 1604 General Design Requirements > 1604.4 Analysis
18.12.7.5 Earthquake-Resistant Structures,
Longitudinal reinforcement for collectors shall be proportioned such that the average tensile stress over length (a) or (b) does not exceed ϕ f y ...
Building Code Requirements for Structural Concrete of Illinois > 18 Earthquake-Resistant Structures > 18.12 Diaphragms and Trusses > 18.12.7 Reinforcement > 18.12.7.5
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