The Single A-Frame Bridge is made up of three subassemblies. Please refer to Bridge Walkways as a point of reference for two of the three of these subassemblies. The following photos will enliven the text and instructions featured in Adolph Peschke’s informative, older pioneering merit badge pamphlet. Click on the photos for larger views:
Captured from the 2013 Jamboree Pioneering AreaCaptured from the 2013 Jamboree Pioneering Area
A Triumphant Success—posing on their Single A-Frame Bridge
In the Pioneering Area of the 2013 national jamboree, we put together a couple of Single A-Frame Bridge kits, so Scouts and Venturers could build this simple crossing bridge during their visit to Garden Ground Mountain. Each kit included:
Whenever a crew wanted to build a bridge, we provided an overview of the design and gave them a quick introduction to tying a rope tackle and the Japanese Mark II Square Lashing. What follows are some photo montages of the Single A-Frame bridges built from the kits during the jamboree. For larger and largest views, click on the photos once, and then once again:
Positioning their A-Frame in the ditch while preparing the guylines, and lashing the walkways to the transom.Lashing the transom to the legs and putting tension on a guyline.Positioning their A-Frame and hammering stakes in the corners of the walkways.Lashing on the transom to the legs.Lashing on the ledger and holding the A-Frame up while adjusting the height of the transom.The Shear Lashing at the top of the legs, and lashing the ledger at the bottom.Lashing the A-Frame legs with a Shear Lashing, and lashing on the transom.Carrying their A-Frame to the ditch and placing the walkways on the transom.Lashing on the transom and attaching the walkways.Tightly frapping a Square Lashing for the transom and working together to join the walkways to the A-Frame.Strop lashing the walkways to their A-Frame.
On occasion, a pair of Scouts wanted to build a bridge, and with persistence, and the help of staff or friendly Scouter, they were able to get it done.