Originally Posted by youroo
If it will fit and the slides will still clear and you support the Over hang,Go for It! Weight might be a issue? Your call!
Originally Posted by Wacipi
Thanks everyone. Appreciate the feedback. Tt is stationary, large slide out room supported, so should have plenty of room. Thanks
I think one point youroo is making- make sure that the mattress will still fit with the slides closed. While it's stationary now, you may have a need to put slides in and move it. Watch clearances or have a plan. For instance, my bed comes within an inch of our dresser with the slide in- if I bought a long mattress, I could possibly lift it onto the dresser to put the slide in. (But, I'm mobile and would never do that to myself.
As for the slide supported... that's a whole can of worms but not what you asked about. Longest story shortest, most manufacturers don't recommend supporting the slide itself.
I think what youroo meant for weight is the overall camper's weight. Other than penny pinching, I would expect that most manufacturers claim they use the mattresses that they do in order to save weight.