Page 135 - Pressure Vessel Design Manual

Design of Vessel Supports 115

Determine Wind Force on Vessel
Elevation qz Gr Cf hz At F M
~~
1 90-200 ft 34.7 psf 1.15 0.90 loft 70 ft2 2514 # Q 195ft 490,230
170-1 90 ft 34.0 psf 1.15 0.90 20 ft 140 ft‘ 4927 # Q 180ft 886,860
150-1 70 ff 33.1 psf 1.15 0.90 20 ft 140 ft2 4796 # Q 160ft 767,360
130-1 50 ft 32.4 psf 1.15 0.90 20 ft 140 ft2 4695 # Q 140ft 657,300
110-130ft 31.2 psf 1.15 0.90 20 ft 140 ft2 4521 # Q 120ft 542,520
95-110ft 30.0 psf 1.15 0.90 15ft l05ft2 3260# Q 103ft 335,780
85-95ft 29.5psf 1.15 0.90 loft 70 ft‘ 2137 # Q 90ft 192,330
75-85ft 28.8 psf 1.15 0.90 loft 70 ft2 2087 # Q 80ft 166,960
65-75 ft 27.8 psf 1.15 0.90 loft 70 ft’ 2014 # Q 70ft 140,980
55-65 ft 26.9 psf 1.15 0.90 loft 70 ft‘ 1949 # Q 60ft 1 16,940
45-55 ft 25.9 psf 1.15 0.90 loft 70ft2 1876 # @ 50ft 93,800
35-45 ft 24.8 psf 1.15 0.90 loft 70ft’ 1797 # Q 40ft 71,880
27.5-35ft 23.3 psf 1.15 0.90 7.5ft 53 ff 1278 # Q 32ft 40,900
22.5-27.5ft 22.4 psf 1.15 0.90 5ft 35 ft‘ 811 # Q 25ft 20,275
17.5-22.5ft 21.4 psf 1.15 0.90 5ft 35 ft2 775 # 0 20ft 15,500
0-17.5ft 20.2 psf 1.15 0.90 17.5ft 123 ft2 2571 # Q 9ft 23,140
c 39,494 4,562,755
Ib ft-lb

Special Wind Region

. Population Center

Virgin Islands 125
American Samoa 125

Notes: 1. Values are 3-second gust speeds in miles per hour (mls) at 33 ft
(1 0 m) above ground for Exposure C category and are associated
with an annual probability of 0.02.
2 Linear interpolation between wind speed contours is penn.W.
3. Islands and coastal areas shall use wind speed contour of coastal
area.
4. Mountainous terrain, gorges, Ocean promontories, and special wind
regions shall be examined for unusual wind conditions.
Figure 3-1. Basic wind speed. (Reprinted by permission from ASCE 7-95 “Minimum Design Loads for Buildings and Other Structures,” published by
ASCE, 1995.)