This is a bucksaw that I put together recently for a improvised equipment class I taught. I had never mad one before this and it worked REALLY well! I tested it out by felling a 6" diameter Ironwood tree/Eastern hophornbeam (Ostrya virginiana) and it worked as well as a store bought model.
The uprights and cross braces are made from Gray dogwoods (Cornus racemosa) . The blade is from a local hardware store and it set me back $2.99. The turnbuckle at the top is jute twine wrapped six times before it was twisted.