I was wondering if somebody can explain to me the following: In the Table 1 of the IEQc4.2 where the voc limits of the different categories are listed, what excatly ceiling limit means? It confuses me for example how a floor coating has a ceiling limit. :S
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John-David Hutchison, LEED AP BD+C, PMP
Sustainability ManagerBGIS
LEEDuser Expert
166 thumbs up
November 14, 2013 - 10:32 am
Ceiling limit refers to the concentration of a chemical limit that is allowed.
Guillermo Hernandez Espinoza
Civil Engineer, LEED AP BD+C8 thumbs up
November 15, 2013 - 4:46 pm
Thanks John, so basically is the limit a person should not be exposed to in a period of time, but this limits will never be used in any instance for LEED right?
John-David Hutchison, LEED AP BD+C, PMP
Sustainability ManagerBGIS
LEEDuser Expert
166 thumbs up
November 18, 2013 - 1:02 pm
No, it is the limit allowed at the time of application and is relevant to LEED as per the Maximum allowable VOC g/l.
Dwayne Fuhlhage
Sustainability and Environment DirectorPROSOCO, Inc.
168 thumbs up
January 17, 2014 - 12:00 pm
Guillermo: Be sure you are looking at the credit referenced version of Rule 1113 in effect on January 1, 2004. It is available at
http://www.usgbc.org/node/1732511?view=resources The credit is essentially a fly in amber in that it references a long outdated version of Rule 1113 with all of its definitions and limits.
I may be wrong, but suspect you are reading the most current version of Rule 1113 dated September 6, 2013.
As a point of clarification, the 'ceiling limit' is part of the newest version of the regulation. That defines a secondary cap for manufacturers using an exemption system known as corporate averaging. For manufacturers not using averaging (including my employer), the limit is simply the limit. But it is only relevant if you are specifying products to be used in the Los Angeles basin. The rest of the densely populated U.S. states, Canada and several countries use variations of the CARB Suggested Control Measure for architectural coatings.