The language for LEED 2009 differs from past versions - it seems to indicate that it won't just accept the default SRI values for concrete - that the mix being used must have been tested at somepoint whether on a previous project or for the current one: “teams do not need to provide project specific data measuring SRI values for new concrete. Documentation certifying that the concrete mix used for a project is equivalent to a previously used and tested mix is acceptable.” Comments?
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11475 thumbs up
May 13, 2010 - 11:49 am
Short answer—I would input the default values, but if the GBCI/reviewer question this and ask for backup documentation, I'd be prepared to let it go.Long answer: A) The LEED Online credit form does not ask for any uploaded documentation proving compliance by any products…just product information filled out on the form.B) The LEED Reference Guide says that simply washing existing paved concrete can meet the default values so if you can clean existing concrete and use the default values then you could also use those with new concrete.C) For SSc7.2, they explicitly say you can’t use the default values but this is not spelled out for SSc7.1…making one think that default values can be used for SSc7.1 or they would have said so. On the other hand they seem to say that you need to document compliance
for SRI with new concrete by a test or having been previously tested.So it's not totally clear, which is why I would submit it but not bank on earning it.
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
May 17, 2010 - 12:30 am
Off the top of my head, I think I remember that the LEEDonline form also accepts reflection and emission values (if you don't have SRI values) and uses an inbuilt transformation (which is a rough estimate, but good enough for them obviously) to SRI values.
SRI is an American index based on the reflection and emission values at certain surface and ambient conditions and there are actually not just one protocall to establish this index value...not exiting in europe, so good that the inbuilt transformation exists.