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// CODE SNIPPET

1617.6.2.4.3 Special Moment Frames

NYC Building Code 2008 > 16 Structural Design > 1617 Earthquake Loads — Minimum Designlateral Force and Related Effects > 1617.6 Seismic-Force-Resisting Systems > 1617.6.2 Seismic-Force-Resisting Systems (For Use in the Simplified Analysis Procedure of Section 1617.5) > 1617.6.2.4 System Limitations for Seismic Design Category D > 1617.6.2.4.3 Special Moment Frames
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A special moment frame that is used but not required by Table 1617.6.2 is permitted to be discontinued and supported by a stiffer system with a lower response modification coefficient, R, provided the requirements of Sections 1620.2.3 and 1620.4.1 are met. Where a special moment frame is required by Table 16 17.6.2, the frame shall be continuous to the foundation.

Related Code Sections


1617.6.2.4.3 Structural Design, Special Moment Frames
A special moment frame that is used but not required by Table 1617.6.2 is permitted to be discontinued and supported by a stiffer system ...
NYC Building Code 2008 > 16 Structural Design > 1617 Earthquake Loads — Minimum Designlateral Force and Related Effects > 1617.6 Seismic-Force-Resisting Systems > 1617.6.2 Seismic-Force-Resisting Systems (For Use in the Simplified Analysis Procedure of Section 1617.5) > 1617.6.2.4 System Limitations for Seismic Design Category D > 1617.6.2.4.3 Special Moment Frames
1910.5.1 Concrete, Seismic-Force-Resisting Systems
Moment frames used to resist seismic forces shall be special moment frames. Shear walls used to resist seismic forces shall be special reinforced ...
NYC Building Code 2008 > 19 Concrete > 1910 Seismic Design Provisions > 1910.5 Seismic Design Category D > 1910.5.1 Seismic-Force-Resisting Systems
1908.1.2 Concrete, ACI 318, Section 21.2.1
be satisfied. 21.2.1.3 For structures assigned to Seismic Design Category C, intermediate or special moment frames, or ordinary or special reinforced ...
NYC Building Code 2008 > 19 Concrete > 1908 Modifications to ACI 318 > 1908.1 General > 1908.1.2 ACI 318, Section 21.2.1
2108.3 Masonry, TMS 402/ACI 530/ASCE 5, Section 3.3.3.4, Splices
Welded splices shall not be permitted in plastic hinge zones of intermediate or special reinforced walls or special moment frames of masonry ...
NYC Building Code 2014 > 21 Masonry > 2108 Strength Design of Masonry > 2108.3 TMS 402/ACI 530/ASCE 5, Section 3.3.3.4, Splices
2108.3 Masonry, ACI 530/ASCE 5/TMS 402, Section 3.2.3.4
Welded splices shall not be permitted in plastic hinge zones of intermediate or special reinforced walls or special moment frames of masonry ...
NYC Building Code 2008 > 21 Masonry > 2108 Strength Design of Masonry > 2108.3 ACI 530/ASCE 5/TMS 402, Section 3.2.3.4
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