No. According to the LEED glossary, these materials are considered remanufactured, and therefore do not qualify as reuse. Under the Related Credits section in the LEED Reference Guide, it states that “Remanufactured materials are not considered a reuse of the material and do not contribute toward this credit. However, these materials can contribute toward MR Credit 2: Construction Waste Management, or MR Credit 4: Recycled Content."

Probably not. LEED Interpretation #2501 made on 03/20/2009 emphasizes previous use of building materials as a key consideration for this credit, with reference to structural steel.

No, as the material is being "re-manufactured' into something else, it is different than reuse, where products and materials are used intact, but in different applications or locations. The primary environmental attributes for this case are construction waste management (MRc2), and potentially recycled content (MRc4), and regionality (MRc5). The intent of this credit is to extend the life of existing building materials.

No. Consistent with other MR credits, MEP equipment should not be counted here.

No, this would be only counted under MRc3. Material reuse is the relevant environmental attribute in this case.

Yes, if furniture is being included consistently across MRc3–7. (For CI projects, furniture must be included.)

No, as this doesn't increase service to the LEED project. (Depending on project specifics, you could try to make a case, however.)

Per the LEED Reference Guide, they must connect to public transit and operate during the most frequent commuting hours.

Per a LEED addendum published 4/1/12, they must also "provide direct access to transit facilities within 2 miles of the project site, approximately a 5-10 minute drive, and must be available to all project occupants."

No, any purchases that might be classified as an ongoing consumable based on the definition in the LEED Reference Guide need to be tracked. Other items that are commonly tracked in this credit include kitchen supplies like plates, cups and disposable flatware, and shipping supplies.

Every item should be claimed in only one credit form; do not double-count any purchase. Make your best judgement about where an item falls, and be consistent.