Build a Log Bridge

1 / 10
The finished log bridge looked like this. The 2 x 12 boards running the length of the bridge provide a track for car or tractor tires.
The finished log bridge looked like this. The 2 x 12 boards running the length of the bridge provide a track for car or tractor tires.
2 / 10
The author used a tractor and winch to haul logs for the log bridge without harming the stream bed. 
The author used a tractor and winch to haul logs for the log bridge without harming the stream bed. 
3 / 10
Diagram shows method of using a simple water level to determine if the bunker logs on each side of the stream are at the same height.
Diagram shows method of using a simple water level to determine if the bunker logs on each side of the stream are at the same height.
4 / 10
Diagram shows method of making an
Diagram shows method of making an "A" frame or tripod to provide an anchor point for a pulley, as well securing a 12' bunker log.
5 / 10
Diagram shows method of using a forked stick to mark a curve on a span slog, which can then be cut to fit snugly against the bunker log. Position span logs with their curved side up, because logs will sag over time.
Diagram shows method of using a forked stick to mark a curve on a span slog, which can then be cut to fit snugly against the bunker log. Position span logs with their curved side up, because logs will sag over time.
6 / 10
A tripod provides a stable pulling point above the stream bed.
A tripod provides a stable pulling point above the stream bed.
7 / 10
Diagram shows method of using truck winch, pulley, and bunker log to maneuver a span log across the stream.
Diagram shows method of using truck winch, pulley, and bunker log to maneuver a span log across the stream.
8 / 10
Rough-trim the log tops so that they fit the planks of the bridge.
Rough-trim the log tops so that they fit the planks of the bridge.
9 / 10
Run string diagonally across the bridge, forming an
Run string diagonally across the bridge, forming an "X" in the middle, to determine if the span logs are more or less level.
10 / 10
A string run from corner to corner will reveal whether your span logs are level. 
A string run from corner to corner will reveal whether your span logs are level. 

Outside of a drought or miracle similar to the crossing of
the Red Sea, there is no way to make a dry crossing over a
body of water without a bridge. I desperately needed one to
cross the Class One stream on our property in the western

  • Published on Feb 1, 1994
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