DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Seite 38

D. STRUCTURAL FRAME AND BUILDING ENVELOPE
D1.
. CRITERIA FOR QUALIFICATION Note: These measures are available for partial credit based on the percentage of framing that meets the specific criteria of each measure. Up to six points of credit are available, as follows: D1.1. Joists, Rafters, and Studs at 24 Inches on Center (3 Points)

OPTIMAL VALUE ENGINEERING

This measure can be accomplished with either 2×4 or 2×6 studs, as long as the smallest structural stud possible is used. For buildings of two stories or less, this measure includes all interior and exterior walls. For multi-family buildings of more than two stories, this measure includes all interior walls and the top floor. D1.2. Door and Window Headers Sized for Load (1 Point)

Headers in non-load-bearing walls must be 4"×4" or less. An engineer or architect will typically provide a header schedule for only load-bearing walls, not non-load-bearing walls. This measure focuses on nonload-bearing walls; therefore, load-bearing walls do not need to be evaluated. A gable wall is typically non-load-bearing; headers in gable walls should be 4"×4" or less. Structural Insulated Panel (SIP) and Insulated Concrete Form (ICF) walls have no or very small headers; therefore, they qualify for this measure. D1.3. Advanced Framing Measures (2 Points)

Use at least three of the following strategies to reduce framing in walls: ? ? ? ? Cripple studs to maintain stud layout (e.g., not for perceived load where none exists). Using cripple studs to support the ends of the window sill does not qualify for this measure. Two-stud corners. Flat channels or ladder blocking. Exterior wall dimension that is modularized in 24 inches. Window rough opening layout on 24 inch modular. ? No headers installed in exterior walls.

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

32