P. Design Considerations
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VERIFICATION
stairwells or stairs within units should have independent wall framing from other units. Do not use diamond metal plate stair construction. Floor Squeak Minimization: Reduce floor squeaks by gluing and screwing the subfloor to the floor framing. Do not use nails in the floor assemblies. Trash Chute Noise Minimization: Trash chutes should be resiliently isolated. Use a sound retarder( e. g., hydraulic mechanism, slow close hinge, etc.) with a hopper door. Coat the chute with a sound-deadening product. Use independently framed walls for trash chutes that are adjacent to living units. This service credit only applies to projects that have trash chutes. Mixed Use Noise and Vibration Reduction: An acoustical consultant must outline specific practices to account for high noise levels generated by commercial space activity. Commercial tenants in mixed use spaces must document their intent to comply with project standards, or standards must be included in the tenant agreement. Sleeping areas should not be adjacent to potentially noisy commercial spaces( e. g., kitchens, restaurants, industrial spaces, retail with music, delivery areas, etc.). All commercial mechanical and plumbing systems adjacent to residential spaces must be compliant with 2011 ASHRAE Handbook guidelines to isolate vibration and noise. Commercial tenants must follow the practices described in the 2011 ASHRAE Handbook, Chapter 48. All ceiling penetration should have gypsum-backed box that is fully caulked with non-hardening resilient acoustical caulking. All recessed loudspeakers must be resiliently decoupled from structural elements and building layers.
Documentation: The Rater will collect an Accountability Form from the acoustical consultant, architect, developer or other relevant party, stating compliance with the specific requirements of each practice achieved as part of this measure, as follows:
� Exterior Noise Reduction: The Rater will collect an acoustical report or environmental noise report for the project, verifying that the recommendations provided will meet 40 dB DNL inside dwelling units. The acoustical consultant will complete the visual field compliance verification and submit the results to the Rater.
� Loud Single-Event Noise Reduction in Noise-Sensitive Locations: The acoustical consultant will provide documentation listing the regularly occurring single-event exterior noise sources and L A10 noise levels, and the mitigation methods used to achieve appropriate noise level. The consultant will complete visual field compliance verification and submit the results to the Rater.
� Airborne and Structure-Borne Noise Reduction: The acoustical consultant will provide documentation verifying that the plans and details indicate demising interior assemblies( walls and floor-ceilings) that will be at least five STC and IIC points better than code, complete visual field compliance verification, and submit the results to the Rater. Acoustical verification does not include field test measurements, but must include site verification of installed practices by the acoustical professional.
� Mechanical Ventilation Noise and Vibration Control: The acoustical consultant will provide documentation confirming that the mechanical design complies with ASHRAE guidelines and that all measures are documented in the MEP plans and specs. The acoustical consultant will complete visual field compliance and verification, and will submit the results to the Rater. Acoustical verification does not include field test measurements, but must include site verification of installed practices by the acoustical professional.
� Plumbing Noise and Vibration Reduction: The acoustical consultant will provide documentation verifying that plans and specifications incorporate plumbing systems that are compliant with current ASHRAE guidelines. The acoustical consultant will complete field compliance verification and submit the results to the Rater. Acoustical verification does not include field test measurements, but must include site verification of installed practices by the acoustical professional.
� Stair Impact Noise Reduction: One of the following must be performed:
DRAFT
DRAFT GreenPoint Rated New Home Rating Manual 112 Version 6.0, September 2013
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