5
∆ c( 10.ft ,84.ft )
∆ solid
∆ solid = 1.4637110
Solid wall
in
1.kip
kip
KN
R wall = 68320
R wall = 11964
Rigidity of wall
R wall
∆ solid
in
mm
Element
Rcx
Rcy
x
y
yRcx
xRcy
(kip / in)
(kip / in)
(ft.)
(ft.)
Wall A2-A7
68320
0
0
9.67
660654.4
0
Wall 2A-2D
0
18918
0
0
0
0
Wall 7A-7C
0
5000
90
0
0
450000
Σ=
68320
23918
660654
450000
∑ xR / ∑ R
cr =
crx = (660654) / (68320) = 9.67'(2.95 m)
cry = (450000) / (23918) = 18.81'(5.74 m)
1 foot = 0.305 m
B-7 Perform torsional analysis
Sacristy Areas
Due to symmetry both of the sacristies will behave the same in torsion. Only one of the sacristies is
analyzed and the results are used for both. The torsional eccentricity is taken as the offset between the
centers of mass and rigidity and an additional 5% accidental eccentricity.
H3-34
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