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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<br />

5.164<br />

Basic seismic-force-resisting system<br />

Response<br />

modification<br />

coefficient, R<br />

System<br />

overstrength<br />

factor, � o<br />

Bearing wall 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 />

Ordinary steel braced frames 4 2 3 1 ⁄2 NL NL 160 160 160<br />

Special reinforced concrete shear walls 5 1 ⁄2 2 1 ⁄2 5 NL NL 160 160 100<br />

Ordinary reinforced concrete shear walls 4 1 ⁄2 2 1 ⁄2 4 NL NL NP NP NP<br />

Detailed plain concrete shear walls 2 1 ⁄2 2 1 ⁄2 4 NL NL NP NP NP<br />

Ordinary plain concrete shear walls 1 1 ⁄2 2 1 ⁄2 1 1 ⁄2 NL NP NP NP NP<br />

Special reinforced masonry shear walls 4 2 1 ⁄2 3 1 ⁄2 NL NL 160 160 100<br />

Intermediate reinforced masonry shear walls 3 1 ⁄2 2 1 ⁄2 3 NL NL NP NP NP<br />

Ordinary reinforced masonry shear walls 2 2 1 ⁄2 1 3 ⁄4 NL 160 NP NP NP<br />

Detailed plain masonry shear walls 2 2 1 ⁄2 1 3 ⁄4 NL 160 NP NP NP<br />

Ordinary plain masonry shear walls 1 1 ⁄2 2 1 ⁄2 1 1 ⁄4 NL NP NP NP NP<br />

Light frame walls with shear panels, Wood Structural<br />

Panels<br />

6 1 ⁄2 3 4 NL NL 160 160 100<br />

Light frame walls with shear panels—Gypsum Board 2 2 1 ⁄2 2 NL NL 35 NP NP<br />

Steel eccentrically braced frames, nonmoment resisting,<br />

connections at columns away from links<br />

<strong>Building</strong> frame systems<br />

7 2 4 NL NL 160 160 100<br />

Special steel concentrically braced frames 6 2 1 ⁄2 5 NL NL 160 160 100<br />

Ordinary steel concentrically braced frames 5 2 4 1 ⁄2 NL NL 160 100 100<br />

Special reinforced concrete shear walls 6 2 1 ⁄2 5 NL NL 160 160 100

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