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RE: Precast beams

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Ms. Anderson;
Based on my experience asphalt over a concrete deck is not usually a good idea. 
1.  It is a dead load.
2.  There is a tendency to collect water between the asphalt and concrete.
3.  It is difficult to see what is happening under the asphalt to the concrete.
If you absolutely have to do this I would us a tined finish with a tack coat.
Usually, beams are specified with a roughened finish to have the cast in place deck adhere better to the beams.  Exactly what type of beam are we talking about here?

Arvel L. Williams, P.E.

GW² Engineering, Inc.
4040 N. Stiles
Oklahoma City, Oklahoma 73105
Phone:  405-684-8920
Fax:    405-684-8923
Cell:   405-409-6224
Nextel Direct Connect:  142*30*12567

-----Original Message-----
From: Candi Anderson [mailto:canderson(--nospam--at)]
Sent: Monday, March 07, 2005 10:32 AM
To: seaint(--nospam--at)
Subject: Precast beams

Some of the specs I’ve looked at call for a skid-resistant grooved finish on driving surfaces of precast beams and rough casting for those that will have a concrete topping.  Does anyone have comments if the top of a precast member is going to have an asphalt overlay?  I would think we would still want a rough cast finish or some other “bonding” method (if so, what?).



Candi Anderson, P.E.