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<blockquote data-quote="RustyTackleBox" data-source="post: 181907" data-attributes="member: 282"><p>i would think steel studs and spray foam insulation are the 2 things i would require... steel studs are lighter than a 2x4 and a good foam will make it float if you do go through even with a steel frame... I think I would also go double axle even if the length doesn't require it, it will add double the surface area on the ice spreading out the weight. the weight difference between a 17 and 20' ice castle was like 2k when i looked (if i recall right) and that included the 2nd axle so that 3 extra feet weight was nearly nothing and you get 2x the surface area. if i recall it was 6k to 8k weight. on the aluminum subject, I have heard stories about guys cracking frames going over pressure ridges (I don't know how big this pressure ridge was and that definitely plays a role). I did take a grey wolf and a ice castle out on sak last winter and we went 4.5mi out, both held up and it was a rough ride.</p></blockquote><p></p>

[QUOTE="RustyTackleBox, post: 181907, member: 282"] i would think steel studs and spray foam insulation are the 2 things i would require... steel studs are lighter than a 2x4 and a good foam will make it float if you do go through even with a steel frame... I think I would also go double axle even if the length doesn't require it, it will add double the surface area on the ice spreading out the weight. the weight difference between a 17 and 20' ice castle was like 2k when i looked (if i recall right) and that included the 2nd axle so that 3 extra feet weight was nearly nothing and you get 2x the surface area. if i recall it was 6k to 8k weight. on the aluminum subject, I have heard stories about guys cracking frames going over pressure ridges (I don't know how big this pressure ridge was and that definitely plays a role). I did take a grey wolf and a ice castle out on sak last winter and we went 4.5mi out, both held up and it was a rough ride. [/QUOTE]

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