From B200 AFM:
(Cabin divided into Sections A-E, with A-D the "normal" seat areas; section E, FS305-FS348, the aft baggage/jump seat area.)
2. Concentrated Cargo loads in sections A-D must not exceed 200 lbs. per sq. foot, and must be supported by seat rails.
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5. Concentrated cargo loads in section E must not exceed 100 lbs. per sq. foot.
Maximums by section:
A 880lbs
B 860
C 830
D 550
E 410, or 550 for BB1052 and after BB1091.