Any tips for securing roundwood with ratchet straps?

Learning how to use a ratchet strap is one thing, however, finding where to learn how to tie ratchet straps for RTF is another. I've made progress using constrictor knots with ratchet straps, however, I find myself tearing up my frame bed, trying to tighten tenon & mortise joints, where I've seen in pictures how ratchet straps hold joints together without any external supports. I've searched youtube and google and I can't find anything on this subject. Anyone have any tie down methods to share?

Tree saver straps.  They are short straps with soft loops on each end.  They keep the hardware off live trees to prevent damage when winching a stuck 4 wheeler out of the mud.  Relatively cheap, available at tractor supply, home depot, Amazon, any off road shop, etc.