PERMFILE69794

• Permit No: C1981044
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 38 NO. 5 PORTAL BULKHEAD DESIGN
• Media Type: D
• Archive: No

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Portal Bulkhead Design
Page 1
Design Parameters
Seal Wall Height - 10 feet
Head at top of bulkhead - 140 feet water = 50.34 psi
Head at bottom of bulkheaa - 150 feet water = 64.65 psi
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Vertical Reinforcement
avg. psi = 52.50 psi
64.65 psi
P = 54.55 psi (10' x 1') (144 in2 1 ft2) = 93,096 lbs.
Force resisted by roof = 1/3 x 93.096 lbs.= 31,032 lbs.
Force resisted by floor - 2/3 x 93,096 lbs. = 62,064 lbs.
i1aximum bending moment @ 0.58h from top of wall
0.58 x 10' = 5.80' from top of wall
M4 (live load moment) = 0.128 Wh - 0.128 x 93,096 lbs x 10' = 119,162.58 ft. lbs.
'"u = 1.7 M2 = 1.7 x 119,162.99 ft. lbs. = 202,576.9 ft. lbs. where
1.7 is a factor of safety
Mt = "1u/p = 202,576.9 ft. lbs 0.90 = 225,085.44 ft. lbs.
= 2,701,025 in. lbs.
= 2,701 Kip - in
where 0 is a factor which provides for variations in workmanship,
materials construction, etc.
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