Element
Weight
x
y
Wx
Wy
(kips)
(ft.)
(ft.)
(kip*ft) (kip*ft)
Roof Deck
10.4
5.0
9.8
52.1
102.5
8.0
10.0
9.8
80.0
78.4
Wall 8A-8C
3.8
5.0
19.7
18.8
73.8
Wall A7-A8
9.8
5.0
0.0
48.8
0.0
Wall C7-C8
Σ=
31.9
199.6
254.6
∑ Wx / ∑ w
cm =
cmx = (199.6) / (31.9) = 6.25'(1.91m)
cmy = (254.6) / (31.9) = 7.98'(2.43m)
Center of Rigidity
Element
Rcx
Rcy
x
y
yRcx
xRcy
(kip / in) (kip / in)
(ft.)
(ft.)
Wall A7-A8
2448
0
0
19.67
48152.2
0
Wall C7-C8
1450
0
0
0
0.0
0
Wall 7A-7C
0
5000
0
0
0.0
0
Wall 8A-8C
0
21872
10
0
0.0
218720
Σ=
3898
26872
48152 218720
∑ xR / ∑ R
cr =
crx = (48152) / (3898) = 12.35'(3.77m)
cry = (218720) / (26872) = 8.14'(2.48m)
H3-32
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