720.01 Rectangular Reflectors. Furnish rectangular reflectors that are a minimum size of 3 ´ 6 inches (75 ´ 150 mm) and that consist of reflective sheeting according to 730.192 or 730.193 adhered to a flexible post or an aluminum plate. Furnish white, yellow, or red reflectors as specified.. Furnish aluminum plate for rectangular reflectors according to ASTM B 209 (B 209M), 6061-T6 with a minimum thickness of 0.060 inch (1.5 mm).
Furnish materials according to the Department’s Qualified Products List (QPL).
720.03 Flexible Posts.
Conform to Supplement
1020.
Furnish materials according to the Department’s Qualified Products List (QPL).
720.04 Barrier Reflectors. Furnish concrete barrier, retaining wall and bridge parapet reflector body housings that are made of acrylic or polycarbonate plastic, or corrosion resistant metal. Ensure that the minimum reflective surface area of the reflector is 7 square inches (4400 mm2).
Furnish white reflectors that reflect the following minimum candela of light at the indicated observation angles for each 1 foot-candle (10.76 lx) of incident light at the indicated entrance angles. Furnish amber reflectors that reflect at least 60 percent of these values.
MINIMUM SPECIFIC INTENSITY, cd/10.76 lx
|
|
Observation Angle (degrees) |
||
|
0.2 |
2.0 |
||
|
Entrance angle (degrees) |
-4 |
62 |
0.25 |
|
15 |
52 |
0.18 |
|
The entrance angle is measured in the horizontal plane between the direction of incident light and normal to the face of the reflector. The observation angle is measured in the vertical plane between the observer’s line of sight and the direction of light incident to the reflector face.
Furnish guardrail blockout reflectors that are a minimum size of 4.5 x 10 x 0.100 inches (112.5 x 250 x 2.5 mm) and made of corrosion resistant metal with 1/4" (6 mm) predrilled mounting holes. One or both sides shall be covered with a minimum 4.5 x 5 inches (112.5 x 125 mm) of Type G, H or J reflective sheeting.
Furnish materials according to the Department’s Qualified
Products List (QPL).