Fig.7-15 Multi-bay and multi-story frame m m m m 2m 2m m m 号十 卡 Am 4m Am 2P 3m 6m 61m 3m m 2m 2m m Am 4m Am 3m 61m 61m 3mLFig. 7-15 Multi-bay and multi-story frame m m m 2 m 2 m m m m m 3 m 2 m 6 m 2 m m 4 m 4 m 4 m 4 m 4 m 4 m 6 m 6 m 3 m 6 m 3 m 3 m 3 P 6 3 3 P 3 3 P 6 3 P 6 P P 3 P 3 P 6 2 P P