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RE: Torsion on Precast Double-T

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Assuming the elevation differential is very little, you could allow the TT to warp, which would result in longitudinal torsional cracking between the flange and the stem. Or if this is a pre-topped TT, taper the topping to allow a slope to drain.  If this is an un-topped TT, with a field cast topping, slope the field topping to drain.

D. Matthew Stuart, P.E., S.E.
Structural Department
SCHOOR DEPALMA
200 State Highway Nine
Manalapan, NJ 07726-0900
Phone: (732) 577-9000 (Ext. 1283)
FAX: (732) 431-9428
Cell: (908) 309-8657
mstuart(--nospam--at)schoordepalma.com
Website: www.schoordepalma.com



-----Original Message-----
From: Wontae Kim [mailto:Wontae.Kim(--nospam--at)unistresscorp.com]
Sent: Tuesday, September 14, 2004 10:06 AM
To: seaint(--nospam--at)seaint.org.
Subject: Torsion on Precast Double-T

Hi!

I have a double-T, 12DT34 with 60ft span.
Three out of  bearing positions are at the same level,
 but one should be lower for drainage problem.
How much can I lower this bearing position?
How can I check?




****Wontae Kim****
Unistress Corp.
Pittsfield, MA 01201
(Tel)  413-629-2031
(Fax) 413-499-0824

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