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Re: Fw: Film for glass windows

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Thank you for the information. I have discussed the problem with Doug Ritch, unfortunately Doug is in sales and is not a technical person. 3M has a fine product, but unfortunately there does not appear to be any standard specifications upon which to judge the various film available. If you know of any specifications, please send them to me.
Thank you.
Gerry Buydens
----- Original Message -----
Sent: February 28, 2001 9:24 AM
Subject: Re: Fw: Film for glass windows

All window films are not a like when it comes to mitigating damage due to an
earthquake, hurricane, or a blast.
Some window films may be fine for sun control and that is about it.

3M makes a window film that is used extensively in Japan for seismic mitigation.
Kobe Japan had a huge problem with falling shards of glass after their

British Columbia (mainly the Vancouver area) has a serious issue on their hands
and your U. of B.C. knows it. You are in a high seismic zone ( around .27-.29g)
and you have terrible soils that will liquify under a major earthquake and you
have a serous threat of falling shards of glass with all your tall slender
buildings. Also, think of the property damage due to rain  (it does rain there
once in a while doesn't it?) after an earthquake has popped out a few windows
out of a tall office building downtown.

I have used the 3M Scotchshield 600 Ultra Supreme film for our facility on
Annicis Island in Vancouver. I must disclose, I'm a structural engineer for 3M
and work on our facilities.
As a structural engineer, you must determine if a window film and which one,
will meet  your project's criteria.
The codes presently say that you must design for life safety, yet say nothing
about design criteria curtain wall glass mitigation issues.
If your building is going to settle a few feet from liquefaction during an
earthquake, no window film will save your building, but it just may help
mitigate the threat of glass shards on people trying to exit the building and
rescue workers.

I recommend that you contact Doug Rich of Titan Window Films  in British
Columbia (250-391-0890) or Ron Phelps of 3M Canada (1-800-561-5115) for further



"gbuydens" <gbuydens(--nospam--at)> on 02/27/2001 11:46:12 PM

Please respond to seaint(--nospam--at)

To:   seaint(--nospam--at)
cc:    (bcc: Nick Pitera/EG-Engrg/3M/US)
Subject:  Fw: Film for glass windows

hank you, I am registered on the list so willtry to post this message again.

Gerry Buydens
----- Original Message -----
From: Shafat Qazi
To: gbuydens
Sent: February 27, 2001 9:33 AM
Subject: Re: Film for glass windows

At 02/15/01 05:45 PM, you wrote:

  I am running into a bit of a problem when attempting to specify the correct
  window film to use to provide protection during an earthquake. I am aware of
  3 or 4 suppliers, each have a number of claims but I can not get a generic
  specification from any of them so they can bid on basically the same
  product. I am also not sure of what is the correct weight of material for
  the task, as one suppliers tells me 4 mil is sufficient; another indicated 4
  mil is inadequate and 7 mil is required. Have any of you any specs for this
  product. Also have any of you specified certain performance specs. Any
  information you might have with window film would be appreciated.
  Thank you.

  Gerry F. Buydens, P.Eng
  Seismic Mitigation Branch
  Government of British Columbia
  Victoria, BC

Please send your email to Structural Engineers Association International
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I hope this helps.

Shafat Qazi, P.E.
Internet Administrator
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