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Re: Golf Course Bridge

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What happens when there are twenty or thirty carts full of men going over the bridge at the same time filing out for the shotgun start of the tournament?  Think they will slow down and read the sign, then figure out that each cart is roughly 800 to 1000 lbs of equipment and people?  I would not cut things too close.  As an avid golfer I can assure you that a bunch of golfers can do some truly amazing things :-)
Some of the courses around San Diego have beautiful bridges.  One has four outstanding three-hinge arch glulam bridges with suspended decks.  Why not try and get the client to capitalize on the opportunity and build something that will add to the course visually as well as practically.  It makes a difference.
Paul Feather
San Diego, CA
----- Original Message -----
Sent: Monday, June 04, 2001 4:55 PM
Subject: Golf Course Bridge

I am designing two cart path bridges for a golf course.  First bridge is 3 span 70'+50'+50', second bridge has a single span of 70'.
Wonder of wonders, the owner and the contractor both want to minimize the cost on the structures, and are asking that I use the minimum live loading possible. 
The largest vehicle used on the golf course is a mower/utility vehicle with a gross weight of about 2 tons, well below H15 loading.  The bridges themselves are to be 10 feet wide, and the approaches are so hilly that it is unlikely that  a truck could even get to the bridges.
Soooo, my question is : Does anyone have experience regarding the use of loads substantially less than those required by AASHTO for the design of NON-highway bridges.  If so, are there standard loads?  I was thinking of using 5 tons as a minimum, and having the owner post a permanent sign showing the weight restriction.
Also, does the AASHTO manual govern the design of the bridges?  We are currently under UBC94, soon to switch to the IBC, but I am not all that familiar with AASHTO requirements (not much bridge work on Guam).  I would prefer to use UBC94, LRFD 2nd Ed for the girders, and refer to AASHTO for load distribution (based on 5 ton total weight) and seismic design.
Any suggestions?
T. Eric R. Gillham PE
PO Box 3207 Agana Guam 96932
Ph:   (671) 477-9224
Fax: (671) 477-3456
Cel  (671) 687-7115