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RE: Form Pressure

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Thanks for your comment.
Yes we will use net pressure. The ACI only refer to slump of 4 inches or less. I do not think I can satisfy that. With the rate of pour I have the ACI will give a very low pressure. ACI says a max of 2000  which means with the water head it actually becomes very small.
Is there any other source that you may have seen.
-----Original Message-----
From: Kausik [mailto:kaushikd(--nospam--at)]
Sent: Friday, August 16, 2002 9:51 PM
To: seaint(--nospam--at)
Subject: Re: Form Pressure

Please note that you may have to design the box form against water as well as concrete in two separate case.
Refer ACI manual for concrete pressure. That gives standard formulas. I am using those for last 11 years. Next you may have to consider the velocity of water  to design the empty form, before pouring the concrete.
Kausik Dutta
Larsen & Toubro Limited ECCD
Telephone 91 33 288 2601
Fax 91 33 288 1225
----- Original Message -----
Sent: Saturday, August 17, 2002 12:45 AM
Subject: Form Pressure

I am designing a wall  of a box form and pouring concrete under water 30 ft high at a rate of say 8 inch high per hour. Does any one have experience or any reference that tells me what pressure will be on the form due to wet concrete.