Anyone know what weight 4x4s can take?

   / Anyone know what weight 4x4s can take? #11  
Is there anyway to build the bridge up a little higher? Use 6X6's resting on each side, longer than the 4X4's. Ramp up to the bridge on both sides, out of stone or PT lumber? Might keep it from being washed aside that one or two times a year.
 
   / Anyone know what weight 4x4s can take? #12  
When I was a boy, our bridge consisted of a pair of railroad rails spanning the creek, and some heavy oak planks laying across them. I only remember the planks floating away once, and of course, the rails never moved.
 
   / Anyone know what weight 4x4s can take?
  • Thread Starter
#13  
There's a tradeoff between keeping it small and letting it float up a little vs. larger and STILL maybe having it move up. Think the only thing that wouldn't move would be to build it out of stuff all heavier than water. THEN, I might have trouble with erosion on the ends. This is the problem I encountered at the previous location when I anchored the ends in pretty solid. Ended up with erosion at both end of the bridge.

Tough to know how high to build it. Isabel submerged everything down there under 6' of water. Strangely, enough, the present bridge wasn't moved, or it moved and sat down the same spot.

Tried just putting rocks and bricks in the stream. These get covered with mud and slime very quickly.

Ralph
 

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