Rd

Torsional force resisted by each vertical element = FT = T

∑ Rd

2

Transverse Forces:

Center of Mass in X direction =

6.25

ft.

Center of Rigidity in X direction =

8.14

ft.

Actual Eccentricity in X direction =

1.89

ft.

Perpendicular Span in X direction =

10

ft.

Accidental Eccentricity (5% of Span) =

0.5

ft.

Design Eccentricity in X direction =

2.39

ft. (0.73m)

Seismic Force Tributary to each Sacristy =

5.3

kips (23.6 KN)

Torsional Force (V * e) =

12.70

kip*ft (17.2 KNm)

Rd2

Element

R

d

Rd

Torsional

Force

(kip)

Wall 7A-7C

5000

8.14

40697

331243

0.68

Wall 8

21872

-1.86

-40697

75723

-0.68*

Wall A7-A8

2448

7.32

17912

131061

0.30

Wall C7-C8

1450

12.35

17912

221267

0.30

Σ=

759294

*Note: Negative torsional force contributions are neglected.

Longitudinal Forces:

Center of Mass in Y direction =

7.98 ft.

Center of Rigidity in Y direction =

12.35 ft.

Actual Eccentricity in Y direction =

4.38 ft.

Perpendicular Span in Y direction =

19.67 ft.

Accidental Eccentricity (5% of Span) =

0.9835 ft.

Design Eccentricity in Y direction =

5.36 ft. (1.63m)

Seismic Force Tributary to each Sacristy =

5.3 kips (23.6 KN)

Torsional Force (V * e) =

28.52 kip*ft (38.7 KNm)

Rd2

Element

R

d

Rd

Torsional Force

(kip)

Wall 7A-7C

5000

8.14

40697

331243

1.529

Wall 8

21872

1.86

40697

75723

1.529

Wall A7-A8

2448

-7.32

-17912

131061

-0.673*

Wall C7-C8

1450

12.35

17912

221267

0.673

Σ=

759294

*Note: Negative torsional force contributions are neglected.

H3-35

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