FWIW, we’ve made top framed double-sided ‘A’ frames out of 16’ strapping for 50-years now, set vertical. Having the ‘double spine’ allows the vertical cross members to ‘swings’ down below the top of the ‘A’-frame to then set on top of the transom, cockpit, or bow deck, wherever needed. Side supports, to form the ‘A’ shape, are tied into whatever cleats are on the gunnels, or to bow rails.
Scrap carpet remnants cover wherever the canvas hits against the wood supports. I get 4-5 seasons out of a $60 28’ long white tarp for a 24’ hull.