There is always room for design improvement with any DIY project. This duct tape stretcher won't win a beauty contest, but it's dang sure strong and competent enough to get your injured buddy where they need to go.
This emergency stretcher is just this: for use in an emergency. Always use caution in transporting an injured person.
Step 1: Getting started
Sharp knife (if you value your teeth or your dentures)
2 Poles- 5' Long (or longer) and STURDY!
I used 2 push-broom poles, but in the field you'd be improvising with tree branches, driftwood, old fence posts, etc. If you're using small trees or tree branches, strip the bark as needed and clean the poles as best you can. Work quickly but don't cut yourself. Green wood poles will work, but the drier the poles, the better the duct tape will adhere to it.
Always test dry poles or branches against your knee. If they don't snap, they're good.
Step 2: Start building
Fold each strip in half horizontally to make a strong duct tape strap.
The straps need to offer at least 20" of torso space (width) between the 2 poles. With that in mind, gather both ends of each strap and tie with a square knot. Tug HARD so they won't come undone.
Strategically position the 4 straps around the poles and secure them with small strips of duct tape.