Tie downs for long term load

I tend to say too much. The bolded text is the question.

Now that I have done away with my "camper" shell, my dog boxes are in the open bed. These are designed for that but I am looking at semipermanent ways to tie them down and know nylon straps tend to break down in the sun. Here is the box.

https://www.owens-pro.com/product/d...without_storage_various_sizes_standard_or_all

Any suggestions on best tie down strap/chain/cable that can be left tight and exposed to the weather fairly long term?

I want to be able to remove the boxes as needed for hauling garden supplies, etc. but most of the time those boxes are in the back and I want to make sure they are secure. Need to be able to open and close the doors without unstrapping them. Two of these will be side by side on a set of drawers.

I have had the set up since I got the truck in 2007 with the boxes under the camper shell and just use ratchet nylon straps and a bar in front of the boxes attached to the drawer top to stabilize forward slide. We just did away with the camper shell as the open bed better suits our needs for other purposes

 

https://www.etrailer.com/Camper-Tie-Downs/Toyota/Tacoma/2015/TLS9013.html

So I would think some form of a turnbuckle would be your best and most secure bet while still allowing you to undo them to move things around when necessary.

They are all metal, adjustable tension, and obviously won’t break down to UV.

https://www.amazon.com/Sailing-Rigging-Turnbuckles/b?node=3399361

 

I like that idea a lot; it was something I had not thought about - a turnbuckle and some good chain if needed to bridge the gap. And easy to keep an eye on tension.

 

Exactly. Super secure. Easy to adjust (with a tool) and super secure for the good boys.

Side note. I’m in Charleston.