855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 095
Extracted Content
The façade material distances analyzed must consist of the first 50 feet (15 meters) above grade, or up to 20 feet (six meters) from the finished grade of a green roof. All glass, including spandrel glass, located within these distances must have a maximum threat factor of 30 under the ABC Data Base. [45] Glass used in guardrails and windshields must not exceed the threat factor, regardless of the height.
Materials with a Threat Factor of 30 or below are considered to significantly reduce the risk of bird collisions, with an estimated reduction of at least 50% less occurrences. This is particularly important for areas like glazed corners and fly-through conditions, where birds are more likely to collide with glass due to reflections or transparency. [46]
DOCUMENTATION
| Project types | Options | Paths | Documentation |
|---|---|---|---|
All | Option 1. Limit Uplight | All | Documentation demonstrating that all exterior fixtures with a light output greater than 1,000 lumens meet the full cutoff requirements (e.g., product cutsheets with luminaire shielding information and/or photographs of the fixture) |
All | Option 1. Limit Uplight | All | Identification of the interior lighting measures that are in place |
All | Option 1. Limit Uplight | All | Identification of the exterior lighting measures that are in place |
All | Option 2. Bird Collision Reduction | All | List of exterior glass types used in the project, and their installed height (from relevant grade), identified by type according to the American Bird Conservancy’s (ABC) Threat Factor Database |
All | Option 2. Bird Collision Reduction | All | Documentation identifying all glass used below specified heights on the exterior of the building and site, the relevant grade points, and relevant elevation markers (i.e., exterior elevations, photographs, window specifications) |
REFERENCED STANDARDS
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ASHRAE 90.1-2019, Section 9.4.1.4 (ashrae.org/technical-resources/bookstore/standard- 90-1)
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The American Bird Conservancy Material Threat Factor (abcbirds.org/glass- collisions/resources)
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Illuminating Engineering Society of North America (IESNA) Cutoff Classifications (https://www.ies.org/standards/)
45 American Bird Conservancy, “Bird Collision Deterrence: Summary of Material Threat Factors,” October 2011, https://abcbirds.org/wp-content/uploads/2015/05/Docs10397.pdf. 46 American Bird Conservancy, “About the ABC rating system,” January 2023, https://abcbirds.org/What-is-a-Material-Threat-Factor1_23.pdf.
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 85