Just bought a new iload van and I am ready for the fit out. I am planning on having most of my gear stored under a bed, which will be about 50cm off the floor. I am concerned about 2 things. In the event of an accident, i want something that has a chance of not smashing up and ending up through the front window and the 2nd concern is rust.
CHOICES I have considered:
1. pvc, too weak in an accident but no rust
2. timber, ditto
3. aluminium frame, too soft in an accident?? but no rust
4. Gal stee, l possibly strong enough but may eventually rust with salt water.

I could put in a cargo barrier but would like to avoid that if I can solve the dilema.
Any suggestions appreciated.