> The problem is  we two wheel heavy  supers, 55 gallon drums etc.
> across these thresholds at times (raining outside ) and the
> thresholds keep breaking  out....
> My idea is two remove the threshold and attach something to the
> bottom of the door  to prevent water from entering the main building
> area when I power  wash,

I've seen doors with a flap that folds or slides down to make a seal
when the door is in the very final stages of closing.  This can be
accomplished many ways, using cams, springs, ramps, cables or other
mechanisms.  I suspect that there is a standard system available
somewhere, but it would be quite easy to rig your own.

I've personally built wipers on the bottom of doors, using rubber
floormat material, either as a flap, or as a 'U' tacked onto one side or
both.  If set up properly, it will toggle (flip-flop) as the door goes
back and forth, Like a windshield wiper.

allen
http://www.honeybeeworld.com

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