A trip to Masters big blue shed and she chose some Poplar board 60x20x 1200 and dowel 25 x 1500. Poplar is a hardwood but very light weight.
Frame size is 1100x450 with 14 dowels and 16 holes all taped and threaded. This makes storing much easier and a main part of Sue's request for easy storage. A number of coats of Minwax wipe on polly to seal and finish it.
I just used lap joints secured with glue and riven pins.
A warping board is used to prepare the material be it wool, silk, cotton or some other for the warp on a loom. The weft is the strands which run through the warp which run from rear to front which is the base for the weave.