No product can be guaranteed to stop all collisions in real world conditions. Glass can vary in appearance from one façade of a building to another or with time of day, depending on solar angle, reflected environment and other factors. The Threat Factor number is determined under standard conditions and does not capture that variety. Instead, Threat Factor is a relative index, and products with lower TFs are considered more effective at preventing collisions. A TF of 30 suggests that collisions will be reduced by at least 50 percent and is ABC's upper threshold for recommending a product. Products with UV patterns should be considered carefully for some applications: Materials with ultra-violet patterns will vary in effectiveness with the amount of UV light present. This means that when the UV index is low – under low light conditions in early morning or evening or if the glass is shaded, or when it is overcast – UV patterns will be less visible to birds. In addition, not all types of birds can see UV. For example, songbirds can see UV, raptors and pigeons cannot. Because Threat Factors can be effected by low-e coatings, published Threat Factors apply only to the glass assembly tested.
4x 1” UV liquid dots spaced ~1.5 apart in square every 2x4” with alternating 3.5” square decals with one 1” UV liquid dot in every remaining 4” space. Tested on 4mm window glass
4x 1” UV liquid dots spaced ~1.5 apart in square every 2x4” with alternating 3.5” square decals with one 1” UV liquid dot in every remaining 4” space. Tested on 4mm window glass
1" diameter dots, spaced 2" vertically and horizontally
1" diameter dots, spaced 2" vertically and horizontally
Tested on 4mm window glass
Glaspedia AvianSafe BIPV40-CdTe thin film (horizontal/vertical lines) VLR: 13% VLT: 40%
Glaspedia AvianSafe BIPV40-CdTe thin film (horizontal/vertical lines)
VLR: 13%
VLT: 40%
Surface one - 6.5 mm grey frit dots in an aligned 2x4" array (Ceramic Silk Screened Frit)
Surface one, 6.5 mm grey frit dots in an aligned 2x4" array (Ceramic silk screened frit)
6 mm laser etched dots, gloss level <=4, on heat strengthened extra clear glass, in a 2x4" regular array
6 mm laser etched dots, gloss level <=4, (measured at 60 degrees), on heat strengthened extra clear glass, in a 2x4" regular array
6 mm laser etched dots, gloss <=4, on heat strengthened, extra clear glass. Two x two" regular array
6 mm laser etched dots, gloss <=4, (measured at 60 degrees) on heat strengthened, extra clear glass. Two x two" regular array
5 mm dot, 2x2 aligned grid
Description: IGU (6mm/12mm cavity/6mm clear)
BF Pattern: Surface 1 Laser Printed Dot pattern (translucent Light grey)
5mm dot 2x2” aligned grid
Low-E: Surface 2 Solarban 70
VLR: 14%
5 mm dot, 2x2 offset grid
IGU (6mm/12mm cavity/6mm clear)
BF Pattern: Surface 1 Laser Printed Dot pattern (translucent light grey)
5mm dot 2x2” offset grid
Low-E: Surface 2 Solarban 60
VLR: 12%
Tunnel tested, Carnegie Museum's Powdermill Avian Research Center
textured channel glass does not show dangerous reflections, and the 'channels' add an additional signal to warn birds away.
Tunnel tested, Carnegie Museum's Powdermill Avian Research Center
textured channel glass does not show dangerous reflections, and the 'channels' add an additional signal to warn birds away.
