Home |
Search |
Today's Posts |
|
#1
|
|||
|
|||
OT; glass top tables shattering
http://www.alumaxbath.com/tech/tgb.htm
On 29/01/2010 10:30 AM, Rod Speed wrote: Jonno wrote It can happen that the glass is only esposed to the suns heat leading to the metal restricting it and it cracking,, shattering etc. Thats not even possible with a frame. If both are exposed at the same rate that would be true..Like air temperature by itself. Its even more true of the sun where you cant stop the metal frame being exposed to the sun with a glass topped table. Its MUCH more likely to actually be a problem with the glass itself, and we do see the same problem with stuff like oven doors etc, the cheap shit from china having a real tendency to explode. Thats actually due to the glass they are made from, not the mounting. On 29/01/2010 8:55 AM, Rod Speed wrote: Jonno wrote If the glass is constricted by a metal frame, the expansion of the glass, and slower rate of expansion of metal In fact metal has a higher coefficient of expansion than glass. http://en.wikipedia.org/wiki/Coeffic...ious_materials could cause pressure to build up in the frame, with the resultant breakage, That wasnt in fact seen with the old style steel framed windows that you dont see much of anymore. Thats why a properly designed table will have rubber expansion sealing material on the outside of the frame... Dunno, are they in fact mostly framed at all ? Rod Speed wrote 0tterbot wrote wrote This one got full sun each day, to charge the glowing frog/etc garden lights {:-), so there would have been some expansion movement. glass doesn't like the sun!!! this is probably the origin of the problem. Unlikely, I have 13 8'x8' patio doors, 7 of them on the north side of the house. I dont have any conventional windows except in the bathrooms, the bedrooms have one or two patio doors. The ones on the north side get sun every sunny day and not one of them has ever broken. dh is a brewer so naturally we scab crown-top bottles from anywhere& anyone. however, you can't always tell if they've been left in the sun too long,& very occasionally, they just explode on a hot day or after some minor contact with something. which is unfortunate if they happen to be full of beer at the time. if we know a bottle has been in the sun, best just not to use it. (same with tables, i suppose). Nope, fraid not, most obviously with windows. -- |
#2
|
|||
|
|||
OT; glass top tables shattering
Jonno wrote:
http://www.alumaxbath.com/tech/tgb.htm Nice theory, pity you dont get any sunlight effect with patio doors which by law have to be tempered glass. On 29/01/2010 10:30 AM, Rod Speed wrote: Jonno wrote It can happen that the glass is only esposed to the suns heat leading to the metal restricting it and it cracking,, shattering etc. Thats not even possible with a frame. If both are exposed at the same rate that would be true..Like air temperature by itself. Its even more true of the sun where you cant stop the metal frame being exposed to the sun with a glass topped table. Its MUCH more likely to actually be a problem with the glass itself, and we do see the same problem with stuff like oven doors etc, the cheap shit from china having a real tendency to explode. Thats actually due to the glass they are made from, not the mounting. On 29/01/2010 8:55 AM, Rod Speed wrote: Jonno wrote If the glass is constricted by a metal frame, the expansion of the glass, and slower rate of expansion of metal In fact metal has a higher coefficient of expansion than glass. http://en.wikipedia.org/wiki/Coeffic...ious_materials could cause pressure to build up in the frame, with the resultant breakage, That wasnt in fact seen with the old style steel framed windows that you dont see much of anymore. Thats why a properly designed table will have rubber expansion sealing material on the outside of the frame... Dunno, are they in fact mostly framed at all ? Rod Speed wrote 0tterbot wrote wrote This one got full sun each day, to charge the glowing frog/etc garden lights {:-), so there would have been some expansion movement. glass doesn't like the sun!!! this is probably the origin of the problem. Unlikely, I have 13 8'x8' patio doors, 7 of them on the north side of the house. I dont have any conventional windows except in the bathrooms, the bedrooms have one or two patio doors. The ones on the north side get sun every sunny day and not one of them has ever broken. dh is a brewer so naturally we scab crown-top bottles from anywhere& anyone. however, you can't always tell if they've been left in the sun too long,& very occasionally, they just explode on a hot day or after some minor contact with something. which is unfortunate if they happen to be full of beer at the time. if we know a bottle has been in the sun, best just not to use it. (same with tables, i suppose). Nope, fraid not, most obviously with windows. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Earth Shattering... | Ponds | |||
Earth Shattering... | Ponds | |||
Glass Top Covers | Freshwater Aquaria Plants | |||
help with new glass top and light | Freshwater Aquaria Plants | |||
help with new glass top and light | Freshwater Aquaria Plants |