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9 comments
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Join Date: Mar 2011
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Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/13/2011 12:13 PM

I own a walk through attraction "haunted house" and we have been gifted with several sheets of 3/4" tempered glass that are normally used as conference room walls and doors for such a wall. We have 4 sheets that are 40" wide by 144" long, again 3/4" thick. We have been assured by the technicians that install this product that it would be strong enough to use as a walk way as long as we use the provided foam standoffs on all the edges as well as where it is being supported. He has suggested 2 beams 4" wide and 32" apart and a cross beam every 4 feet. This walkway would be suspended 18" off the ground. For our effect it would be perfect, but frankly the thought of using glass scares the hell out of me. Usually one would use plexiglass for this application.... but that would be an expense that this gifted product could eliminate. Is there anyone out there with the knowledge to accurately say "Hell NO" or sure.... it should work?

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#1

Re: Using tempered glass as the floor of a raised walkway?!?

03/13/2011 12:36 PM

I'd be concerned about the foot traffic causing it to get scratched. Eventually you'll have to replace it with another piece of glass, or something else. Also, tempered glass doesn't like to get scratched, since a scratch can cause a sudden release of the surface energy allowing it to shatter. The main advantage of tempered glass, of course, is that when it shatters the pieces are not thin slivers that can be so dangerous.

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#2

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/13/2011 12:39 PM

Contact a company like Pilkington Glass.

http://www.pilkington.com/

You've got to ensure the safety of the public!

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#3

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/13/2011 12:42 PM

LIABILITY LIABILITY LIABILITY LIABILITY LIABILITY LIABILITY LIABILITY LIABILITY LIABILITY

Contact your insurance carrier before you do anything else. You'll probably need some type of certification for the glass from a licensed professional engineer, or the manufacturer.

Tempered Glass Strength Specifications | eHow.com

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#4

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/13/2011 9:32 PM

You might take one sheet; support it on ends, edges, and two intermediate joists as mentioned; and then pile weights on it until it breaks. You might be surprised at how much it will hold. For the application, I think it needs to support 40 psf (a normal floor load).

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#5

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/13/2011 11:01 PM

Have a look at this:

http://www.grandcanyonskywalk.com/

Note that everyone walking on the glass floor is wearing special footwear...

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#6
In reply to #5

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/14/2011 1:12 AM

I had the same thought, that with the foot ware. There are many places that hand out shoe sleeves to polish and protect the floors. Scratching it will weaken it. The more scratches the weaker it gets.

If in my private residence I would do it. Getting the glass for free is a very nice bait and you and I know what happens to Marlins when they bite off too much .

The OP is well advised to check for insurance, like others have said. If something can go wrong it will go wrong at the worst time and from any height.

Good luck to him, Ky.

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#7

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/14/2011 7:42 AM

You might consider putting a layer of lexan to allow the foot traffic without booties.

The lexan could be replaced on a regular basis or when it gets too scratched to see clearly. Use shoe cleaners at each end to minimize the dirt incursion.

Enjoy.

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#8

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/14/2011 9:26 AM

Hell No unless you understand why not.

When glass is tempered its strength is increased by thermal storage of stress in the glass.

The glass is under high compressive stress and in doing so we increase its failure strength but if it generate any crack then with time crack will propagate uncontrolled and may cause glass pieces all over because of high stressed and uncontrolled failure. This forced us to have laminated tempered glass so that we can collect most of the pieces on sticky plastic which we used for lamination.

When you put glass for wall you do temper to get maximum strength so it has slow sag but when you like to put on the floor you want to remove stress by annealing the glass so it becomes less susceptible to unpredicted failure and have long usable life without human injury

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#9

Re: Using Tempered Glass As The Floor Of A Raised Walkway?!?

03/14/2011 3:13 PM

LYN is right on Liability!All the walking surface glass that I make is certified by a professional engineer licensed in the state of the installation.The glass is designed to ASCE (American Society of Civil Engineers)minimumum design loads for buildings and other structures.Most glass manufactures or fabricators do not do flooring because of the liabilities.Flooring glass should be laminated multi plies and maintain a factor of safety even with a single ply broken.The floooring should be mechanicly fastened so that in the event of failure it does not fold and leave the opening.The plastic interlayers we use are "large misssile proof" hurricane resistant so even with all plies broken you will not fall through.Another area of liability is slip resistance should someone slip and fall they would be able to take you to the cleaners.We use slip resistant surfaces that comply with ADA requirements they are tested and certified.

Is there anyone out there with the knowledge to accurately say "Hell NO" or sure.... it should work?

Yes we are out here and we are accurately saying "NO".

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cwarner7_11 (1); Glassman (1); ky (1); lyn (1); Masyood (1); Satcom-Bill (1); TonyS (1); Tornado (1); Usbport (1)

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