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Building Design and Construction Handbook - Merritt - Ventech!

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TABLE 5.9 <strong>Design</strong> Coefficients <strong>and</strong> Factors for Basic Seismic-Force-Resisting Systems (Continued)<br />

5.166<br />

Basic seismic-force-resisting system<br />

Response<br />

modification<br />

coefficient, R<br />

System<br />

overstrength<br />

factor, � o<br />

Moment resisting frame systems<br />

Deflection<br />

amplification<br />

factor, C d<br />

System limitations <strong>and</strong> building height limitations<br />

(ft) by seismic design category<br />

A <strong>and</strong> B C D E F<br />

Special steel moment frames 8 3 5 1 ⁄2 NL NL NL NL NL<br />

Special steel truss moment frames 7 3 5 1 ⁄2 NL NL 160 100 NP<br />

Intermediate steel moment frames 6 3 5 NL NL 160 100 NP<br />

Ordinary steel moment frames 4 3 3 1 ⁄2 NL NL 35 NP NP<br />

Special reinforced concrete moment frames 8 3 5 1 ⁄2 NL NL NL NL NL<br />

Intermediate reinforced concrete moment frames 5 3 4 1 ⁄2 NL NL NP NP NP<br />

Ordinary reinforced concrete moment frames 3 3 2 1 ⁄2 NL NP NP NP NP<br />

Special composite moment frames 8 3 5 1 ⁄2 NL NL NL NL NL<br />

Intermediate composite moment frames 5 3 4 1 ⁄2 NL NL NP NP NP<br />

Composite partially restrained moment frames 6 3 5 1 ⁄2 160 160 100 NP NP<br />

Ordinary composite moment frames 3 3 4 NL NP NP NP NP<br />

Masonry wall frames 5 1 ⁄2 3 5 NL NL 160 160 100<br />

Steel eccentrically braced frames, moment-resisting<br />

connections, at columns away from links<br />

Steel eccentrically braced frames, nonmomentresisting<br />

connections, at columns away from links<br />

Dual systems with special moment frames<br />

8 2 1 ⁄2 4 NL NL NL NL NL<br />

7 2 1 ⁄2 4 NL NL NL NL NL<br />

Special steel concentrically braced frames 8 2 1 ⁄2 6 1 ⁄2 NL NL NL NL NL<br />

Ordinary steel concentrically braced frames 6 2 1 ⁄2 5 NL NL NL NL NL<br />

Special reinforced concrete shear walls 8 2 1 ⁄2 6 1 ⁄2 NL NL NL NL NL

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