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// CODE SNIPPET

1617.1.1.2 Maximum Seismic Load Effect, EM

NYC Building Code 2008 > 16 Structural Design > 1617 Earthquake Loads — Minimum Designlateral Force and Related Effects > 1617.1 Seismic Load Effect E and EM > 1617.1.1 Seismic Load Effects, E and EM (For Use in the Simplified Analysis Procedure of Section 1617.5) > 1617.1.1.2 Maximum Seismic Load Effect, EM
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The maximum seismic load effect, Em, shall be used in the special seismic load combinations in Section 1605.4.

Where the effects of the seismic ground motion and gravity loads are additive, seismic load, Em, for use in Equation 16-19, shall be defined by Equation 16-52.

Em= ΩQE + 0.2SDSD              (Equation 16-52)

Where the effects of the seismic ground and gravity loads counteract, seismic load, Em, for use in Equation 16-20, shall be defined by Equation 16-53.

Em= ΩQE - 0.2SDSD              (Equation 16-53)

where

E, QE, SDS are as defined above and Ω0 is the system over strength factor as given in Table 1617.6.2.

The term 0QE need not exceed the maximum force that can be transferred to the element by the other elements of the lateral-force-resisting system.

Where allowable stress design methodologies are used with the special load combinations of Section 1605.4, design strengths are permitted to be determined using an allowable stress increase of 1.7 and a resistance factor, f, of 1.0. This increase shall not be combined with increases in allowable stresses or load combination reductions otherwise permitted by this code or the material reference standard except that combination with the duration of load increases in Chapter 23 is permitted.

Related Code Sections


1617.1.1.2 Structural Design, Maximum Seismic Load Effect, EM
The maximum seismic load effect, Em, shall be used in the special seismic load combinations in Section 1605.4. Where the effects ...
NYC Building Code 2008 > 16 Structural Design > 1617 Earthquake Loads — Minimum Designlateral Force and Related Effects > 1617.1 Seismic Load Effect E and EM > 1617.1.1 Seismic Load Effects, E and EM (For Use in the Simplified Analysis Procedure of Section 1617.5) > 1617.1.1.2 Maximum Seismic Load Effect, EM
1620.3.2 Structural Design, Direction of Seismic Load
for any column or wall that forms part of two or more intersecting seismic-force-resisting systems and is subjected to axial load due ...
NYC Building Code 2008 > 16 Structural Design > 1620 Earthquake Loads — Design, Detailing Requirements and Structural Component Load Effects > 1620.3 Seismic Design Category C > 1620.3.2 Direction of Seismic Load
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of the seismic ground motion are additive to gravity forces and those calculated using Equation 16-20 when the effects of the seismic ground motion ...
NYC Building Code 2008 > 16 Structural Design > 1605 Load Combinations > 1605.4 Special Seismic Load Combinations
1614.5 Structural Design, Seismic and Wind
When the code-prescribed wind design produces greater effects, the wind design shall govern, but detailing requirements and limitations ...
NYC Building Code 2008 > 16 Structural Design > 1614 Earthquake Loads — General > 1614.5 Seismic and Wind
1613.2 Structural Design, Definitions
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NYC Building Code 2014 > 16 Structural Design > 1613 Earthquake Loads > 1613.2 Definitions
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