| Author |
Message |
Robin E. Snyder
Senior Member
Username: robin
Post Number: 299
Registered: 08-2004
| | Posted on Monday, February 15, 2010 - 02:48 pm: |    |
Follow up question - the designer has selected a 1-5/16 inch system. In this type of system, is the 1/2 inch laminated assembly the outer or inner lite? I can't seem to locate a description of the assembly on any of the glazing websites. |
Robin E. Snyder
Senior Member
Username: robin
Post Number: 300
Registered: 08-2004
| | Posted on Monday, February 15, 2010 - 02:49 pm: | |
Follow up question - the designer for a project in FL has selected a 1-5/16 inch system. In this type of system, is the 1/2 inch laminated assembly the outer or inner lite? I can't seem to locate a description of the assembly on any of the glazing websites. |
Richard L Matteo, AIA, CSI, CCS
Senior Member
Username: rlmat
Post Number: 365
Registered: 10-2003
| | Posted on Monday, February 15, 2010 - 03:00 pm: | |
This isn't a standard assembly so you won't find it on a glass manufacturer's website
You may have to call one of the manufacturer's like Viracon or Oldcastle that fabricate the units.
From my experience, it wouild make more sense to have the laminated light as the outer light. |
J. Peter Jordan
Senior Member
Username: jpjordan
Post Number: 397
Registered: 05-2004
| | Posted on Monday, February 15, 2010 - 03:47 pm: | |
The problem with putting it on the outside lite is dealing with a glazing tint or low-e coating. The tinted glazing is easy enough (one ply of tinted glazing); the low-e is more difficult. If the project is located south of roughly a line connecting Atlanta, Dallas, and LA, the low-e coating needs to go on the inside face of the outside lite. Generally, you can't get a high-performing low-e on a laminated lite because it would be damaged during fabrication. My standard is that the outside 6 mm lite is tinted with a high-performance low-e on surface 2 with the laminated lite (2 plies of 6 mm glass with a 60 mil interlayer) on the inside.
It helps to understand that the goal of a lot of this is not to prevent glass from breaking, but to prevent a shattered lite from "evacuating" the frame. Consequently, hurricane glazing tested by shattering it and then subjecting it to cyclic positive and negative pressure. To pass, it is required to remain in the frame.
Under this criteria, you will be replacing the lite after the storm, you just won't be flooded because of an unprotected opening. If there is water damage, the flood insurance, not the regular insurance, kicks in. The regular insurance will pay for the glazing if it keeps their liability for water damage down. |
David R. Combs, CSI, CCS, CCCA
Senior Member
Username: davidcombs
Post Number: 317
Registered: 08-2004
| | Posted on Monday, February 15, 2010 - 05:22 pm: | |
I concurr with Peter. The "safety" (windborne debris resistant) lite is the inner lite; the outer lite is basically decorative (i.e. to ensure uniformity of tint / color), and is more or less sacrificial.
Another way to think of it: If the safety lite were the outer lite, and subject to flying debris, it is possible that it could deflect to the point of shattering the inner lite, thereby sending (hurling?) shards or fragments of glass throughout the building interior - where the occupants may have an expectation of safety. |
Steve Pirozzi, CSI, CDT
Senior Member
Username: spirozzi
Post Number: 7
Registered: 12-2006
| | Posted on Wednesday, February 17, 2010 - 01:06 pm: | |
Wayne, if you haven't already, I would highly recommend that you review the various products and systems available on Miami-Dade County's Product Control website (http://www.miamidade.gov/buildingcode/pc-search_app.asp). Many of the Notice of Acceptance (NOA) reports contain helpful details and acceptable configurations. For projects in the Caribbean, I specify the product or system and its associated NOA report number as the basis-of-design. Other acceptable manufacturer's are required to provide their respective NOA reports to be considered "equal". |
Wayne Yancey
Senior Member
Username: wayne_yancey
Post Number: 312
Registered: 01-2008
| | Posted on Wednesday, February 17, 2010 - 01:31 pm: | |
Steve,
Thanks for the link to the website. I eventually found the Miami-Dade County's Product Control website.
Wayne |
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