Taco tent racks

Good morning all, hope your Monday is as chaotic as mine lol . Got a question that im sure has been asked but cant really find anything, so here it is how strong are the two tie down rail in Tacoma I'm asking cause I'm planning to build myself a tent rack and thought that would be a good place to mount if strong enough. By what I'm seeing on the internet I believe that's what is used any feedback will be much appreciated thank you.

 

You're really better of with a rack or crossbars that rest on the side rails of the bed, although the accessory rail is surprisingly strong.