Diaphragms With Openings - The Analysis of Irregular Shaped Structures - page 206

F i g u r e 5.12 Longitudinal collector force diagrams and chord forces.

Collector forces at grid line C, summing from grid line 1:

Location (Grid Line) Force

( 508 8 . - 187 2 .) ( + 448 8 . - 127 2 .) ()

Cat 2

F =-

15

C

2

=- 4824 lb tension

430 . 9 + 373 1 .

Cat 3 F =- 4824 + () 12

3 C

2

= 0 lb tension

373 1 . + 315 4 .

() 12

Cat 4 F =- 0

4 C

2

=- 4131 lb compression

( 314 439 . -+ )( 254 421 . + ) ()

Cat 5

F =-

4131 + 15

C

2

= 0lbcompression