1613.5 ASCE 7, Table 12.2-1.
BC § 1613.5
Modify ASCE 7, Table 12.2-1 as follows: Table 1613.5Design Coefficient and Factors for Basic Seismic C-Force-Resisting Systems Seismic Force-Resisting SystemASCE 7 Section Where Detailing Requirements are SpecifiedResponse Modification CoefficientOver-strength FactorDeflection Amplification FactorStructural System Limitations Including Structural Height, hn (ft), Limits cSeismic Design CategorySeismic Force-Resisting SystemASCE 7 Section Where Detailing Requirements are SpecifiedResponse Modification CoefficientOver-strength FactorDeflection Amplification FactorStructural System Limitations Including Structural Height, hn (ft), Limits cSeismic Design CategoryA. Bearing Wall Systems— R a S0 g Cc b B C D d 1. Special reinforced concrete shear walls l, m14.2 52.55NLNL 1602. Ordinary reinforced concrete shear walls l14.242.5 4NLNLNP3. Detailed plain concrete shear walls l14.2 22.52 NLNPNP4. Ordinary plain concrete shear walls l14.21.52.51.5NLNPNP5. Intermediate precast shear walls l14.2 4 2.54 NLNL40 k6. Ordinary precast shear walls l14.232.53 NLNPNP7. Special reinforced masonry shear walls14.452.53.5 NL NL1608. Intermediate reinforced masonry shear walls14.43.52.5 2.25 NLNL NP9. Ordinary reinforced masonry shear walls14.4 2 2.51.75 NL160NP10. Detailed plain masonry shear walls14.422.51.75 NLNPNP11. Ordinary plain masonry shear walls14.4 1.52.5 1.25NLNPNP12. Prestressed masonry shear walls14.4 1.5 2.5 1.75 NLNPNP13. Ordinary reinforced Autoclaved Aerated Concrete (AAC) masonry shear walls14.4 22.52NL 35 NP14. Ordinary plain (unreinforced) Autoclaved Aerated Concrete (AAC) masonry shear walls14.4 1.52.51.5 NLNPNP15. Light-frame (wood) walls sheathed with wood structural panels rated for shear resistance or steel sheets14.1 and 14.56.534NLNL6516. Light-frame (cold-formed steel) walls sheathed with wood structural panels rated for shear resistance or steel sheets14.1 6.53 4NLNL 65 17. Light-frame walls with shear panels of all other materials14.1 and 14.22.5 2NLNL 35 18. Light-frame (cold-formed steel) wall systems using flat strap bracing14.1 4 2 3.5NLNL65 B. Building Frame Systems— R aS0 gCc bB C D d1. Steel eccentrically braced frames14.1 82 4NL NL1602. Steel special concentrically braced frames14.1 6 2 5 NLNL1603. Steel ordinary concentrically braced frames14.13.2523.25 NLNL35 j4. Special reinforced concrete shear walls l, m14.2 62.55NLNL1605. Ordinary reinforced concrete shear walls l14.2 5 2.5 4.5 NL NL NP 6. Detailed plain concrete shear walls l14.2 and 14.2.2.722.5 2 NL NP NP 7. Ordinary plain concrete shear walls l14.2 1.52.5 1.5 NL NPNP8. Intermediate precast shear walls l14.2 5 2.54.5 NL NL 40 k9. Ordinary precast shear walls l14.2 4 2.5 4 NLNPNP10. Steel and concrete composite eccentrically braced frames14.382.5 4 NLNL16011. Steel and concrete composite special concentrically braced frames14.35 2 4.5 NLNL16012. Steel and concrete composite ordinary braced frames14.3323 NLNLNP13. Steel and concrete composite plate shear walls14.3 6.52.5 5.5NLNL16014. Steel and concrete composite special shear walls14.3 6 2.55NL NL 16015. Steel and concrete composite ordinary shear walls14.352.5 4.5 NLNLNP16. Special reinforced masonry shear walls14.4 5.52.54NL NL 16017. Intermediate reinforced masonry shear walls14.44 2.5 4 NLNLNP 18. Ordinary reinforced masonry shear walls14.422.52 NL 160NP 19. Detailed plain masonry shear walls14.4 22.5 2 NLNPNP20. Ordinary plain masonry shear walls14.4 1.52.5 1.25NLNPNP21. Prestressed masonry shear walls14.41.52.5 1.75 NL NPNP 22. Light-frame (wood) walls sheathed with wood structural panels rated for shear resistance14.5 7 2.5 4.5NLNL65 23. Light-frame (cold-formed steel) walls sheathed with wood structural panels rated for shear resistance or steel sheets14.172.54.5 NLNL 65 24. Light-frame walls with shear panels of all other materials14.1 and 14.52.52.5 2.5 NLNL3525. Steel buckling-restrained braced frames14.1 8 2.5 5 NLNL16026. Steel special plate shear walls14.1 72 6NLNL160C. Moment-Resisting Frame Systems— R aS0 gCc b B C D d1. Steel special moment frames14.1 and 12.2.5.583 5.5 NLNLNL2. Steel special truss moment frames14.1735.5 NL NL 1603. Steel intermediate moment frames14.1 and 12.2.5.74.5 34NL NL 35 h4. Steel ordinary steel moment frames14.1 and 12.2.5.63.5 3 3 NLNLNP i5. Special reinforced concrete moment frames n14.2 and 12.2.5.58 3 5.5NL NL NL 6. Intermediate reinforced concrete moment frames14.25 3 4.5 NL NL NP7. Ordinary reinforced concrete moment frames14.23 3 2.5 NL NP NP 8. Steel and concrete composite special moment frames14.3 and 12.2.5.58 3 5.5 NL NL NL 9. Steel and concrete composite intermediate moment frames14.3 5 3 4.5 NLNL NP 10. Steel and concrete composite partially restrained moment frames14.363 5.5 160160100 11. Steel and concrete composite ordinary moment frames14.333 2.5NLNPNP 12. Cold-formed steel – special bolted moment frame p14.1 3.53 o3.5353535 D. Dual Systems with Special Moment Frames Capable of Resisting at Least 25% of Prescribed Seismic Forces12.2.5.1 R a S0 gCc b B C D d 1. Steel eccentrically braced frames14.18 2.5 4NLNLNL 2. Steel special concentrically braced frames14.1 72.55.5 NL NL NL3. Special reinforced concrete shear walls l14.2 7 2.5 5.5NL NL NL 4. Ordinary reinforced concrete shear walls l14.2 6 2.5 5 NL NLNP 5. Steel and concrete composite eccentrically braced frames14.3 82.5 4NLNL NL6. Steel and concrete composite special concentrically braced frames14.36 2.5 5 NL NL NL 7. Steel and concrete composite plate shear walls14.3 7.5 2.5 6 NL NL NL 8. Steel and concrete composite special shear walls14.37 2.5 6 NLNL NL9. Steel and concrete composite ordinary shear walls14.3 62.55 NL NLNP10. Special reinforced masonry shear walls14.45.535NL NL NL11. Intermediate reinforced masonry shear walls14.4 4 3 3.5 NL NLNP12. Steel buckling-restrained braced frames14.182.55 NLNLNL 13. Steel special plate shear walls14.182.5 6.5 NLNLNLE. Dual Systems with Intermediate Moment Frames Capable of Resisting at Least 25% of Prescribed Seismic Forces12.2.5.1 R a S0 g Cc b B C D d 1. Steel special concentrically braced frames f14.1 62.5 5NLNL352. Special reinforced concrete shear walls l14.26.5 2.5 5 NLNL1603. Ordinary reinforced masonry shear walls14.4 332.5NL160NP 4. Intermediate reinforced masonry shear walls14.4 3.5 3 3 NLNLNP 5. Steel and concrete composite special concentrically braced frames14.35.5 2.5 4.5NLNLNL 6. Steel and concrete composite ordinary braced frames14.3 3.5 2.5 3 NLNLNP 7. Steel and concrete composite ordinary shear walls14.3 5 3 4.5 NLNL NP 8. Ordinary reinforced concrete shear walls l14.2 5.52.5 4.5 NLNLNPF. Shear Wall-Frame Interactive System with Ordinary Reinforced Concrete Moment Frames and Ordinary Reinforced Concrete Shear Walls l14.2 and 12.2.5.84.5 2.54NLNPNPG. Cantilevered Column Systems Detailed to Conform to the Requirements for:12.2.5.2 R aS0 gCc b B C D d 1. Steel special cantilever column systems14.1 2.51.25 2.5 3535352. Steel ordinary cantilever column systems14.11.25 1.25 1.25 3535 NP i 3. Special reinforced concrete moment frames n14.2 and 12.2.5.52.5 1.25 2.535 35354. Intermediate reinforced concrete moment frames14.2 1.5 1.25 1.5 35 35 NP5. Ordinary reinforced concrete moment frames14.211.25135NPNP6. Timber frames14.5 1.51.51.5353535H. Steel Systems not Specifically Detailed for Seismic Resistance, Excluding Cantilever Column Systems14.1 3 3 3 NLNLNP a. Response modification coefficient, R, for use throughout the standard. Note R reduces forces to a strength level, not an allowable stress level. b. Deflection amplification factor, Cd , for use in Sections 12.8.6, 12.8.7, and 12.9.1.2 of ASCE 7. c. NL = Not Limited and NP = Not Permitted. For metric units use 30.5 m for 100 ft and use 48.8 m for 160 ft. d. See Section 12.2.5.4 of ASCE 7 for a description of seismic force-resisting systems limited to buildings with a structural height, h n , of 240 ft (73.2 m) or less. e. See Section 12.2.5.4 of ASCE 7 for seismic force-resisting systems limited to buildings with a structural height, h n , of 160 ft (48.8 m) or less. f. Ordinary moment frame is permitted to be used in lieu of intermediate moment frame for Seismic Design Categories B or C. g. Where the tabulated value of the overstrength factor, S0 , is greater than or equal to 2 1/2, S0 is permitted to be reduced by subtracting the value of 1/2 for structures with flexible diaphragms. h. See Section 12.2.5.7 of ASCE 7 for limitations in structures assigned to Seismic Design Category D. i. See Section 12.2.5.6 of ASCE 7 for limitations in structures assigned to Seismic Design Category D. j. Steel ordinary concentrically braced frames are permitted in single-story buildings up to a structural height, hn , of 60 ft (18.3 m) where the dead load of the roof does not exceed 20 psf (0.96 kN/m 2 ) and in penthouse structures. k. An increase in structural height, hn , to 45 ft (13.7 m) is permitted for single story storage warehouse facilities. l. In Section 2.3 of ACI 318. A shear wall is defined as a structural wall. m. In Section 2.3 of ACI 318. The definition of "special structural wall" includes precast and cast-in-place construction. n. In Section 2.3 of ACI 318. The definition of "special moment frame" includes precast and cast-in-place construction. o. Alternately, the seismic load effect with overstrength, E mh , is permitted to be based on the expected strength determined in accordance with AISI S400. p. Cold-formed steel – special bolted moment frames shall be limited to one-story in height in accordance with AISI S400.
