Diaphragms With Openings - The Analysis of Irregular Shaped Structures - page 199

F i g u r e 5.8 Opening offset horizontally and vertically.

opening, designated as TD1 and TD2. The aspect ratios of all the diaphragm sections
and the transfer diaphragms are in compliance with code maximums. The aspect ratio
of both transfer diaphragms is 3.33 : 1, which requires the transfer diaphragms to be
blocked. The wind load is split into windward and leeward wind loads on each side of
the opening as shown, 123 and 77 plf, respectively.
Develop the basic unit shear diagram (with opening) (Fig. 5.8):

RR wL
1

200 160
2

( )

== = = 16 000 , lb

6

2

R
D

16 000
50

,

v ==

1

=+ 320 plfunitshear at grid line1

1

VRwx
2

=- = 16 000 , - 200 15 ( ) = 13 000 , lb

1

V
D

13 000
50

,

v =

2

= =+ 260 plfunitshear at grid lineleft 2( )

2 L

left