I have a blog that shows a rack that I designed, but it's for the Vision V-70 tubs. It's a lot lighter than melamine and very sturdy.

Build it like a bookcase . the sides like a ladder ( 2x2) and use plywood for the shelves . pre drill the holes for the screws and fasten together. Thats what I do. Then I paint and or stain , urethane and let dry for a few days. I use the sterilite bins to house my snakes in.

we've got a tub system but we wana build something at least 4 feet wide (long) 2 feet deep and 14 inches high...we were debating on a fold down hinge door or sliding doors.  like I said, something for the larger boa's...in excess of 7 feet.

I made cages out of plywood (1/4" for the top/bottom and 3/8 for the sides/front/back), stepped angle connections (for strength and stability), and recessed drop-down plexi doors.  The bigger ones are 6 ft x 2 ft, but I plan to make an 8 ft x 3 ft for my Retic. 

Some folks like to use oil-based stains/polyurethane to seal the wood, but I like the water-based.  I think they are just as effective and are way easier/faster to use.  Brass hardware is a good bet, too, as it puts up well with moisture.  Finally, use silicone to seal the seams and dab some urethane over screws to seal the holes.

Now, if I could figure out how to attach a photo ...

Good luck!

Heres some we have done for large constrictors and lizards

http://www.facebook.com/?ref=logo#!/pages/Acadian-Enclosures/201647283197990

You could by some fusion boa tubs and make a rack around that but If that were the case it would be cheaper just to buy a stack of 4x2 cages. There nice looking though

Its 22inx44inx10in   just shy of 4ft x 2ft

http://www.redtailboa.net/forums/how-tos-tutorials/28742-how-build-4x2-enclosure-100-a.html

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