Tempered Glass thickness

[ralphi]

For Tempered Glass that is of size 2.5 meters (about 98 inches) vertically and 1.1 meters (about 43.3 inches) horizontally.. what thickness do you usually use? It will be used in building exterior at second floor with average wind. Thank you.

 

[thaidavid40]

Is this in an area with wind-borne debris? Is it protected from breakage by occupants within the building? Or must it resist that also? How many sides are pinned (supported by the framing)? Are you the structural engineer for the building, or the glazing engineer for the window company? You didn't give us much to go on in your posting.

Thaidavid

 

[ralphi]

Is this in an area with wind-borne debris? Is it protected from breakage by occupants within the building? Or must it resist that also? How many sides are pinned (supported by the framing)? Are you the structural engineer for the building, or the glazing engineer for the window company? You didn't give us much to go on in your posting.

No wind-borne debris. It's protected from breakage by occupants inside the building. Only the top and bottom are supported by frames (as is usually the case nowadays). I'm one of the engineers of the building and just verifying the window company suggestions. Some say 9.5mm is enough.. while other use 12mm... They don't use computations and I don't know how to compute for it. But for rule of thumb. For this size of 2.5meters vertical and 1.1 meters horizontal framed top and bottom.. what is the usual thickness? Thank you.

 

[KootK]

I believe that we've already answered this in your previous post Ralphi: Link. Answer: get the right reference documents and work it out, perhaps with the aid of software.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[ralphi]

I believe that we've already answered this in your previous post Ralphi: Link. Answer: get the right reference documents and work it out, perhaps with the aid of software

It described laminated glass. I'm not inquiring about tempered glass or ordinary glass. I'm not going to design many glasses.. just trying to see if the glass installer glass thickness is up to standard.. maybe a table of sizes and thicknesses would be sufficient but couldn't find any table.

 

[thaidavid40]

I'm not a glass expert, but 9.5mm sounds pretty thin for a panel to span the long way vertically (2.5M). I'd ask the glazing supplier for their supporting calculations to see where such a major discrepancy entered the picture. Either there are two very different types of glass being proposed here, or someone screwed the pooch.
Dave

Thaidavid

 

[KootK]

maybe a table of sizes and thicknesses would be sufficient but couldn't find any table.

The simplified design information that you seek is in the documents that I've been directing you to. For conventional situations, you can produce/confirm a design in minutes. I've included an excerpt below. You really need the entire document, of course, because the nature of glass design is that these reference design charts need to be modified by a bunch of factors to that account for tempering, size effects etc. Two sided support is an uncommonly simple scenario as evidenced by the straight lines on the graph below. Basically just simple span bending and deflection compared to the appropriate material and section properties.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[klaus.]

Well for Glass structures you can (need) to do calculation and design same as for any other structural part
there are many codes and regulations for glass structures ...not just for stress design but also for safety



best regards
Klaus