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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 />

5.167<br />

Basic seismic-force-resisting system<br />

Response<br />

modification<br />

coefficient, R<br />

System<br />

overstrength<br />

factor, � o<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 reinforced concrete shear walls 7 2 1 ⁄2 6 NL NL NP NP NP<br />

Composite eccentrically braced frames 8 2 1 ⁄2 4 NL NL NL NL NL<br />

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

Composite steel plate shear walls 8 3 6 1 ⁄2 NL NL NL NL NL<br />

Special composite reinforced concrete shear walls<br />

with steel elements<br />

Ordinary composite reinforced concrete shjear walls<br />

with steel elements<br />

8 3 6 1 ⁄2 NL NL NL NL NL<br />

7 3 6 1 ⁄2 NL NL NP NP NP<br />

Special reinforced masonry shear walls 7 3 6 1 ⁄2 NL NL NL NL NL<br />

Intermediate reinforced masonry shear walls 6 1 ⁄2 3 5 1 ⁄2 NL NL NL NP NP<br />

Dual systems with intermediate moment frames<br />

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

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

Special reinforced concrete shear walls 6 2 1 ⁄2 5 NL NL 160 100 100<br />

Ordinary reinforced concrete shear walls 5 1 ⁄2 2 1 ⁄2 4 1 ⁄2 NL NL NP NP NP<br />

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

Intermediate reinforced masonry shear walls 5 3 4 1 ⁄2 NL NL 160 NP NP<br />

Composite concentrically braced frames 5 2 1 ⁄2 4 1 ⁄2 NL NL 160 100 NP<br />

Ordinary composite braced frames 4 2 1 ⁄2 3 NL NL NP NP NP<br />

Ordinary composite reinforced concrete shear walls<br />

with steel elements<br />

5 3 4 1 ⁄2 NL NL NP NP NP

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