D
Structural Frame and Building Envelope
INTENT
To reduce the consumption of excess framing material, and the related costs. To increase the R-value of the thermal envelope.
D2.
D3.
CONSTRUCTION MATERIAL EFFICIENCIES
CRITERIA FOR QUALIFICATION
One point of credit is available if 80 % or more of the framing materials( minimum 80 sq. ft.) are delivered to the job site pre-assembled from the supplier, determined by board-feet or as a percentage of the total framing material. This includes pre-assembled framing components or walls without insulation.
Pre-fabricated walls, floors, or roofs that have insulation installed, such as SIPs or other pre-made building systems or solid wall assemblies, are not eligible for this measure, but can be awarded credit through measure D6,“ Solid Wall Systems.”
VERIFICATION
Field Verification: The Rater will conduct field compliance verification when the lumber is delivered, if possible.
Documentation: The Rater will collect an invoice of ordered material and calculations, such a simple spreadsheet analysis of materials used and percentage calculations that 80 % of lumber was pre-assembled when delivered.
INTENT
To reduce framing material consumption and related costs by assembling building components in a factory, where assembly is more efficient and more controlled than on-site construction.
ENGINEERED LUMBER
CRITERIA FOR QUALIFICATION
DRAFT
Up to six points of credit are available for using engineered lumber instead of solid-sawn lumber in at least 90 % of each measure’ s elements. The structural building plans should specify engineered lumber. Steel members or structurally-rated recycled wood members also qualify for each measure, as follows:
D3.1. Engineered Beams and Headers( 1 Point) D3.2. Wood I-Joists or Web Trusses for Floors( 1 Point) Note: This measure is not available for single-story homes with slab-on-grade construction. D3.3. Engineered Lumber for Roof Rafters( 1 Point) Note: Roof trusses do not qualify for this measure.
DRAFT GreenPoint Rated New Home Rating Manual 28 Version 6.0, September 2013
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