Originally Posted by nu2hike
I hope to machine sew! My sewing machine is fairly light weight but hopefully it will do the job!
Will polyester upholstery thread work?
It will work, but not all machines can sew well with heavier thread and the larger needles required, IME. Do some experiments; it's the best way to find out.
You will be OK with 'regular' 100% polyester thread like Gutermann Mara 70 or the Gutermann 100% polyester from your local store. The main thing is to get the stitches well-formed, IMO.
Multiple long lines of stitching (parallel to the edges of the webbing) are as strong as bar tacks.
I'd use a triple lock stitch if it is available on your machine; otherwise I'd back stitch a bit, often, to prevent the stitching 'letting go' if a small section is damaged.
Tree straps don't usually get very hard wear, unless something like a branch gets rubbing against them.