Odd ball drawer slider question

[BlackPearl]

Quick Question, maybe someone else has thought of this or knows the answer. Instead of buying a 60" slider for a stupid amount, would stacking two 36" sliders not be feasible so long as your still within the load rating? By stacking I mean attaching the slider to the side of the box (like normal), and where it should be screwed to the drawer - bend up a piece of aluminum into step so that you can attach a second slide above the first one now giving you in theory 72" of movement, and then screw the end of the second slide to the drawer. If weight is an issue would placing a fixed roller bearing at the height of the fully extended first slider negate the stress on the first lower slider allowing the second slider to function as though it was fixed to the box in a standard installation scenario?

 

[fireball]

If looking at the Accuride 500# 9301 series slides, a pair of 60" would be $271 retail. Two pairs of 36" would be $206. Your idea, which I don't think would work anyway, at best sounds like a very bad way to try and save 65 bucks.

 

[summerprophet]

Engineering wise, your theory is flawed. A 60" slider is designed to handle the leverage applied to it at 60". The 36" is likely not as heavily built. The design of 36" on 36" is fine, but the load capacity is not going to be the same at 60" as it would be at 36".

In simple terms, imagine snapping A piece of wood over your knee. Long pieces break easy, short pieces are difficult to break.

 

[bodynmotion]

I 2nd Summerprophet's thought. The leverage is a huge issue. In construction, the cantilever goes 2/3 under a fixed load to extend 1/3 out past. I think you would find a premature failure or risk damaging something if not yourself.