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RE: Hooks on bottom reinforcing steel in pile caps

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90 degree hooks accomplish the same thing.


-----Original Message-----
From: Stuart, Matthew [mailto:mstuart(--nospam--at)schoordepalma.com] 
Sent: Friday, November 05, 2004 8:23 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Hooks on bottom reinforcing steel in pile caps

Per CRSI:

"The provision for 180 degree end hooks on all bars in pile caps with
single lines of piles around the column is a prudent precaution against
premature tied arch shear failure" 

Matthew Stuart
Structural Dept. - Manalapan
732-577-9889 x1283


-----Original Message-----
From: Cliff Schwinger [mailto:clifford234(--nospam--at)yahoo.com]
Sent: Friday, November 05, 2004 9:59 AM
To: seaint(--nospam--at)seaint.org
Subject: Hooks on bottom reinforcing steel in pile caps

Does anyone know why the CRSI handbook shows 180
degree hooks on the bottom reinforcing steel in pile
caps? Why not just use 90 degree hooks. Bars with 90
hooks are less expensive to fabricate and easier to
install (especially where hooks hit hooks in the
corners of the pile caps).

The strength and development length of 90 degree and
180 degree hooks are identical. As far as I'm
concerned, either hook type could be used in the
bottom bars in pile caps.

Am I missing something?

TIA,

Cliff Schwinger



               
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