Page 484 - Design of Reinforced Masonry Structures

7.46 CHAPTER SEVEN

TABLE 7.5 Shear Wall Building Systems [Adapted from Ref. 7.11].

Structural system limitation and
building height (ft)
Response System Deflection
Seismic force– modification overstrength amplification Seismic design category
resisting system factor, R factor, W o factor, C d B C D E F

Bearing wall systems
1 Special 5 2½ 3½ NL NL 160 160 100
reinforced
masonry shear
walls
2 Intermediate 3½ 2½ 2¼ NL NL NP NP NP
reinforced
masonry shear
walls
3 Ordinary 2 2½ 1¾ NL 160 NP NP NP
reinforced
masonry shear
walls
4 Detailed plain 2 2½ 1¾ NL NP NP NP NP
masonry shear
walls
5 Ordinary plain 1½ 2½ 1¼ NL NP NP NP NP
masonry shear
walls
6 Prestressed 1½ 2½ 1¾ NL NP NP NP NP
masonry shear
walls
Building frame systems
1 Special 5½ 2½ 4 NL NL 160 160 100
reinforced
masonry shear
walls
2 Intermediate 4 2½ 4 NL NL NP NP NP
reinforced
masonry shear
walls
3 Ordinary 2 2½ 2 NL 160 NP NP NP
reinforced
masonry shear
walls
4 Detailed plain 2 2½ 2 NL NP NP NP NP
masonry shear
walls
5 Ordinary plain 1½ 2½ 1¼ NL NP NP NP NP
masonry shear
walls
(Continued)