The California Building Standards Commission's (CBSC) highlights Section A5.107 Bird-friendly building design with the following amendments to address “bird-friendly” standards for planning and design of buildings:
The green building standards states that windows must have no more than 10% glazing on building facades to a height of 40 feet (12 m) or “that of the average height of local tree canopy, whichever is higher; and no more than 40% of facades above that shall be see-through glazing, reflective glazing or acrylic glass.”
Interior or exterior glazing films must have a pattern visible from the outside conforming to the 2x4 rule.
Other acceptable treatments include: “laminated glass with 2x4 patterns, patterned UV coating or use of contrasting patterned UV-absorbing and UV reflective films.”
These design guidelines provide multiple solutions and recommendations for owners, contractors, builders, architects, engineers, and planners that reduce bird collisions, fatalities, and the overall effects of population decline.
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