Diaphragms With Vertical Offsets - The Analysis of Irregular Shaped Structures - page 267

F i g u r e 7.33 Chord and strut force diagrams.

Starting at grid line 1:

329 5 . + 273 2 .

F 2 =− () 30 =− 9040 lb tensionatgrid line2

2

273 2 . + 223 2 .

F =− 9040 − () 20 =− 14 000 , lbtension at endofframe

2

223 20
2

. +

F max =− 14 000 , − ( 109 29 . −=− 20 ) 23 969 , lb tensionmaximum

176 80
2

. +

F =− 23 969 , + ( 180 − 109 29 . ) = − 17 718 , lb tension at startofOCBF2

325 + 226 8

2

.

F 3 = () 50 = 13 683 , lbtension at grid line3