I just finished an aluminum sled deck. It is 2x2 in square tube on 16 in centers. Deck is 72 by 96 with 14 by 36 inch slide in platforms for the skis.
Materials:
200 lb aluminum @$3-3.50/lb
2 sheets 1/2 inch plywood
1000 lb truck hoist $150
3000 lb 12v winch $90
fastened to bed with 4 camper turnbuckles
about $1000 total
about 250 lbs for deck plus 120 lbs for winch and hoist
http://picasaweb.google.com/brianporath/SledDeck2#
Materials:
200 lb aluminum @$3-3.50/lb
2 sheets 1/2 inch plywood
1000 lb truck hoist $150
3000 lb 12v winch $90
fastened to bed with 4 camper turnbuckles
about $1000 total
about 250 lbs for deck plus 120 lbs for winch and hoist
http://picasaweb.google.com/brianporath/SledDeck2#