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NC-v4 EQc8:Quality views

View Type 3 with Permanent Obstruction Near Ceiling

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Laura Heagler
GLMV Architecture, Inc.
LEEDuser Basic Member
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We have some spaces with vision glazing 12' and 16' head height. The spaces have exposed spiral ductwork. Is the ductwork considered a permenant obstruction?  In some of the occupied areas, the ductwork will obstruct a small portion of a person't view, but nowhere does the ductwork completely obstruct a person's view.

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Wed, 07/21/2021 - 01:15

I would suspect the ducts would deduct from the available view. I would treat the ducts the same way you are instructed to treat furniture. Take a look here, https://leeduser.buildinggreen.com/forum/view-type-3-unobstructed-views-located-within-distance-three-times-head-height-vision-glazing i have posted some diagrams I used to define my views to suport my calculations. My submittal for the credit was approved and my documentation accepted. 
Profile picture for user laura.heagler
Laura Heagler
GLMV Architecture, Inc.
LEEDuser Basic Member
1 thumbs up

Wed, 07/21/2021 - 13:30

Ryan, I think I understand your diagrams, but if I put the ductwork in the plan view it will look like there is no view. If I put it in a section, how do I calculate the square footage? I thought perhaps a solution would be to reduce the head height of the glazing to the bottom of the ductwork, but that is a guess, I don't see that guidance anywhere.  

Wed, 07/21/2021 - 16:01

Draw it in elevation, measure from the bottom the duct. That is your vertical glass height. Any glass above the duct doesn't count. 

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