Structural System

Ductility Level

Nominal

High

(1) CAST-IN-SITU REINFORCED CONCRETE BUILDINGS

(1.1) Buildings in which seismic loads are fully resisted by frames

4

8

(1.2) Buildings in which seismic loads are fully resisted by coupled shear walls

4

7

(1.3) Buildings in which seismic loads are fully resisted by solid structural walls

4

6

(1.4) Buildings in which seismic loads are jointly resisted by frames and solid and/or coupled structural walls

4

7

(2) PREFABRICATED REINFORCED CONCRETE, BUILDING

(2.1) Buildings in which seismic loads are fully resisted by frames with connections capable of cyclic moment tranfer

3

7

(2.2) Buildings in which seismic loads are fully resisted by single-story frames with columns hinged at top

-

3

(2.3) Prefabricated buildings in which seismic loads are fully resisted by prefabricated or cast-in-situ solid and/or coupled stuctural walls with hinged frame connections

-

5

(2.4) Buildings in which seismic loads are jointly resisted by frames with connections capable of cyclic moment transfer and cast-in-situ solid and/or coupled structural walls

3

6

(3) STRUCTURAL STEEL BUILDINGS

(3.1) Buildings in which seismic loads are fully resisted by frames

5

8

(3.2) Buildings in which seismic loads are fully resisted by single-story frames with columns hinged at top

4

6

(3.3) Buildings in which seismic loads are fully resisted by braced frames or cast-in-situ reinforced concrete structural walls

(a) Concentrically braced frames

4

5

(b) Eccentrically braced frames

-

7

(c) Reinforced concrete structural walls

4

6

(3.4) Buildings in which seismic loads are jointly resisted by frames and braced frames or cast-in-situ reinforced concrete structural walls

(a) Concentrically braced frames

5

6

(b) Eccentrically braced frames

-

8

(c) Reinforced concrete structural walls

4

7