DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Page 43

D

Structural Frame and Building Envelope

Documentation: If verification is completed by another professional, the Rater may use this report for compliance provided the report covers all aspects on the GreenPoint Rated Existing Home Evaluation and Correction of Exterior Assemblies Checklist. INTENT To increase the durability of the exterior roof and wall assemblies.

D3.

ENGINEERED LUMBER

CRITERIA FOR QUALIFICATION This measure is available for partial credit based on the percentage of framing that meets the specific criteria of the measure. Up to five 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. D3.2. Engineered Beams and Headers (1 Point) 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. D3.4. D3.5. Engineered or Finger-Jointed Studs for Vertical Applications (1 Point) OSB for Subfloor (0.5 Point)

Note: This measure is not available for concrete slab subfloor. D3.6. OSB for Wall and Roof Sheathing (0.5 Point)

VERIFICATION Field Verification: The Rater will conduct field compliance verification of engineered framing components and take representative photos to show framing throughout the home. INTENT To reduce pressure on old growth forest by utilizing framing materials that are not made from large diameter solid lumber, but rather made from smaller diameter rapid-growth lumber and assembled into engineered materials.

GreenPoint Rated Existing Home Rating Manual Version 6.0, September 2013 © Build It Green

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