Purchasing used aquariums and tempered galss

[Pharaoh]

Thanks Pharaoh, makes prefect sense what you are saying. good question to ask some of the guys are my work.

I know if tempered glass is tapped with something solid on the rim it can crack with ease :| for this reason I insured there was 90 degree ali ran all around the glass for added protection.

Just to add though, when we made a 12x4x4 at aquarium job the glazier told my boss it could not be done with plate glass due to the run it would have to be extremely thick plate glass to be safe ( not bow ) but with 1" thick double glazed tempered it was fine so there must be something being missed? else the double glazing is what would be actually reducing the chances of bowing ?

Interesting interesting

That would be my guess. Then there's the fact of how much glass that thick would cost. Perhaps double glazed is cheaper to manufacture/purchase.

You'd be surprised at how hard tempered glass is to crack. I smacked the edge of a 7'x5'x1/2' sheet with a sledgehammer. Took probably 6 hard hits before it exploded.

 

[soupa2]

That would be my guess. Then there's the fact of how much glass that thick would cost. Perhaps double glazed is cheaper to manufacture/purchase.

You'd be surprised at how hard tempered glass is to crack. I smacked the edge of a 7'x5'x1/2' sheet with a sledgehammer. Took probably 6 hard hits before it exploded.

wow smacking that monster glass must be fun.........

 

[Squirtle919]

Interesting, at work sometimes we had to break sheets when not required, I was able to get most with 1-2 hits, hitting the edge of course not the front face. We had some sticker like paper also that was placed on it before hitting so when the sheet did break theres was little mess.