The Monkey Bridge at the 2013 National Jamboree

Modified Double A-Frame Monkey Bridge
Modified Double A-Frame Monkey Bridge

For those familiar with the traditional Double A-Frame Monkey Bridge design, a couple of noticeable modifications will be apparent from the outset. (Click on the photos for larger views.) Scout Engineering is a fluid undertaking, and frequently variations are necessary. Just as frequently an alteration or change can be deemed a desirable improvement. In the case of this double A-frame design, the consensus of opinion is these modifications are really neat, and I’m sure Adolph Peschke would concur.

  1. Instead of  separate shorter ledgers for each pair of adjoining A-frames, connect four legs with one longer ledger. The length can actually be the same as that of the legs, e.g. four 8-foot legs and one 8-foot ledger at the bottom, or for a larger structure, 10 or 12-foot legs and ledger. (A spar longer than the legs does yield more flexibility when lashing together the four legs.)
  2. Ladder rungs! Lashing a couple of cross pieces between the legs of the left A-frame cancels the need to climb on board the bridge using the foot and hand ropes! Same thing of the other side. Crossers use the rungs and have a safe and easy way to get on and off the bridge, AND eliminate the often awkward balancing act on the ropes between the A-frames and the anchors. There’s an added advantage too: no more excess stress and strain on the ropes near the anchors.
Crossing the Monkey Bridge in the Pioneering Area of the 2013 National Jamboree
Crossing the Monkey Bridge in the Pioneering Area of the 2013 National Jamboree

JAMBOREE PIONEERING AREA: BRIDGES

JAMBOREE PIONEERING AREA: MAIN PAGE

 

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