we took readings on a 10'-0" grid as the "documentation toolkit" indicates. In some cases, our fc go from 40fc to 10fc. Obviously between these two readings, some of the area will still be compliant (min 25fc) but because our readings are only @ 10'-0" increments, does that mean none of it qualifies? Your example shows the area between 26fc and 15fc as non-compliant, which isn't eactly true, a portion of it could be at 25 fc. Is it acceptable to do an average between the two meter locations or take readings every 2'-0" or 5'-0" or something? Thanks in advance.
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Jill Perry, PE
ConsultantJill Perry, LLC
LEEDuser Expert
440 thumbs up
August 19, 2010 - 7:23 pm
The reference guide states that measurements must be taken on a 10'-0' maximum spacing implying that a 2'-0" or 5'-0" spacing would also be allowed. The question is if the tighter spacing would be required over the whole area. In other words, could you do a 2'-0" spacing where you would like to, but do a 10'-0" spacing also only where you would like to? In my experience, the reviewers really like consistency. So, besides being a lot more work and perhaps potentially losing compliant area (if one of your points between two compliant points is non-compliant), I believe you would be better off keeping a consistent spacing.
I doubt doing an average between spaces would be acceptable since that is not an accurate assessment of footcandle levels between points.