Hi, I was wondering how to calculate operable shutters that cover clear glass. Do I count this total area as a threat factor of 10 or do I add this on top of the threat factor area of 100 I am counting? As the shutters are usually open, exposing the clear glass, the area is generally a threat factor of 100, but when the shutters are occasionally closed, the threat factor diminishes to 10. I don't want to add the total facade area incorrectly but also don't want to incorrectly calculate the threat factor. Thank you!
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Theresa Backhus
Sites Technical Specialist, LEEDUSGBC
66 thumbs up
September 10, 2013 - 9:58 am
Hi Jessica,
When the shutters are closed, do they totally obscure the glass? If that's possible, then shutters that completely cover glass would score zero, as long as they are kept closed during peak migration (presumably there could be a more sophisticated operating scheme, especially if the project is doing post-construction monitoring). Either way, you wouldn't add the two threat factor values together (10 + 100).
Jessica Wuest
September 11, 2013 - 5:04 pm
Thank you Theresa,
Yes the shutters completely obscure the glass.
Thank you, I'll score them 0.