Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Live Load Distribution Factors

[Subject Prev][Subject Next][Thread Prev][Thread Next]

Pat,

You might consider referencing AASHTO's "Guide Specifications for Distribution
of Loads for Highway Bridges"
or  use simple beam distribution for a first number before going into a more
rigorous analysis.

Hope this helps,

Tom Cummings, PE
URS Greiner Woodward Clyde






"Pat Bachman" <BachmanPM(--nospam--at)c-b.com> on 12/06/99 06:34:38 PM

Please respond to seaint(--nospam--at)seaint.org

To:   seaint(--nospam--at)seaint.org
cc:   "Scott Wallace" <WallaceSL.AustinPO.AustinGW(--nospam--at)c-b.com>

Subject:  Live Load Distribution Factors



Greetings from the dry southwest! I am presently designing a bridge for some
unusual live loads as follows:

~ 80-ft wide bridge to carry two 160-ton coal haulers (Caterpillar 777D).
~ about 12-ft width between wheels.
~  two axles spaced at 15-ft.
~ 105-ft simple span
~ closely spaced prestressed concrete girders with composite slab.

AASHTO LRFD has distribution factors based on span length, beam stiffness, slab
thickness, and beam spacing, but these are developed for typical highway truck
loading.

Does anyone out there know a reference for distribution of live loads to the
beams? Thanks, Patrick Bachman, P.E.