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Re: Tributary Area

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> What is the precise definition of Tributary Area for figuring live load
> reduction?  The UBC defines it as the area of floor or roof supported by
> the
> member.  If a beam supports one edge of a simple-span floor, is the
> tributary areas the span of the beam times width of the floor, or is it
> half
> that area because the beam supports only half the floor [the other half is
> supported on the other edge]?  I've seen it done both ways, and have done
> it
> both ways myself.

Occam's Razor:

The "tributary area" definition presupposes uniform load.

Q.E.D.



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