Can someone check my calculations are right?

 

I have a slider - depth 174mm, length 4500mm. Weight is 405kg (3924N).

 

174 * 4500 = 783000mm2 (I assume it's the surface area of the weight rather than the CF that is used).

 

The compressive strength of CF200 is 1.01N/mm2 - http://www.compacfoam.com/26-compressive-strength.html http://www.wiki-compacfoam.info/wiki/dichteklassen

 

So 783000mm2 means it can cope with over 790830N and so... easily?

The weight of the window will often be held by chocks or packers so the effective bearing is hugely reduced.  Your slider is less than 100kg per linear metre. A single skin single storey blockwork wall is about 500kg per linear metre. All looks fine.

1 hour ago, gravelld said:

Weight is 405kg (3924N)

 

Trivial and irrelevant, but how do you convert a mass of 405 kg to a weight of 3924 N? That would imply a gravitational force of ~9.688 N/kg (i.e., an acceleration of 9.688 m/s²). The more usual figure to use is 9.81 N/kg so the weight would be ~3973 N. Is there a 405 vs 400.5 kg confusion in here somewhere?

 

Or are you in another Leicestershire on a slightly lighter or less dense planet, but still with a higher surface gravity than that of Venus where CF would presumably melt, anyway.

Eeep, copied the wrong figures across - I included some extra frames either side in the mass but forgot to update the N. Thanks Ed.