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RE: Concrete Pile Cap to Steel Pile Load Transfer

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Re: The Steel Pile Cap Connection, AISI, August 1982.

Confined concrete is different than unconfined.

Conclusions from the reference above:
Steel cap plates are not required for steel H piles in compression with proper embedment and edge distance and is the most economical solution
Embedment 6 inches min
Edge dist 12 to 21 inches depending on pile capacity
Ult bearing stress is 8 * f'c
Ult bearing stress is 10 * f'c with some supplementary reinforcement in the cap

Some piles tested to an ult bearing stress of 41 ksi for f'c = 3.68 ksi concrete.

That will cost you 2 beers and a shot.

Harold Sprague

From: "Brian S Bossley" <BSBossley(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: <seaint(--nospam--at)>
Subject: Concrete Pile Cap to Steel Pile Load Transfer
Date: Wed, 16 Mar 2005 11:19:05 -0500

Does anyone know how a large capacity (100 Ton) steel pile transfers the
load in bearing to a concrete pile cap?  I have an HP12x53 pile w/ an
area of 15.5 in^2 and I've got 12.9 ksi in the steel, but I know that
concrete can't take those kind of stresses.

Brian S. Bossley, PE
Ventura Engineering
7610 Olentangy River Rd.
Columbus, OH 43235
(614) 847-1110 x121

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