I will try stitching loops to fabric next, like Olympic Mtn Boy above. In the image below are four flat tie down patches with simple slots cut for webbing. I tested a two layer version, with the center “tab” doubled by heat sealing a piece of TPU coated fabric to the bottom. This served to prevent it from being unevenly sealed to the raft creating a stress point, and it tested to failure at 120 lbs (50 kg). I added a third layer of two-sided TPU coated 70D ripstop I purchased from Rockywoods Fabrics (12.99/yd) and the third layer increased strength to over 150 lbs (70kg).
In the photo there are four test assemblies, the one with a flat brown webbing was too weak to bother testing.
