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My mixed-use building contains space types that aren’t listed in the Base Ratios table in the Reference Guide. How do I calculate the base ratio for my project?

I don’t have a copy of the Transportation Planning Handbook. How do I determine the base ratio for my project?

Can this credit be achieved if the project has no existing parking and is providing no new parking?

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CI-v4 LTc5:Reduced parking footprint

How to apply base ratios for non-specified usage type?

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Jonathan Weiss
Jacobs Buildings & Infrastructure
LEEDuser Premium Member
140 thumbs up

For a laboratory / office building, how do you apply the baseline? It appears that you pro-rate the usage by area of each space type, but laboratories are not a listed usage type. Can we assume it is similar to another usage? If so, what would you recommend?

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Jason Hercules
Manager, LEED Department
USGBC
LEEDuser Premium Member
3 thumbs up

Thu, 09/07/2017 - 16:17

Hi Jonathan, Yes, that's correct. You should apply the parking guidance based on the usage types present in the project. While the cited parking reference is one of the more comprehensive resources, it doesn't include every use type. It is reasonable to apply the guidance for other similar use types, as provided in the table. In this case, without knowing much about the laboratory's operations, I would say that medical dental office building is a good replacement-- so 4.5/1,000 ft2 (4.8/100 m2)

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