Aluminum Utility Work Ahead Sign (W21-7)
The Aluminum Utility Work Ahead Sign (W21-7) features two top and bottom centered, pre-punched mounting holes and can be easily installed on a post, wall, or fence. Used to warn drivers of ultility work on the designated roadway. With standard federal radius corners and 3M™ reflective sheeting, this sign meets MUTCD specifications and is designed to be a durable safety solution.
Features:
- 5052-H38 alodized aluminum for durability and corrosion resistance.
- 3/8” mounting holes for quick and easy installation.
- Standard radius corners meet federal requirements.
- MUTCD identifier W21-7.
- 3M™ reflective sheeting.
Options:
|
Size
|
Best For
|
|
30” x 30”
|
For conventional roads and is the minimum size required for official street applications. (MUTCD Compliant)
|
|
36” x 36”
|
For high-speed roads and is the minimum size for multi-lane approaches.
|
|
48” x 48”
|
For work zones or areas where high speed or traffic volume requires increased emphasis, improved recognition, or increased legibility.
|
Reflectivity Level:
|
Grade
|
Sheeting
|
|
Engineer Grade (EG)
|
Increases visibility of signs when light hits their surface. Ideal for parking lots and driveways.
|
|
High Intensity Prismatic (HIP)
|
Enhances visibility when viewed at an angle. Recommended by MUTCD as the “best practice” reflective option for roadways and other high traffic areas.
|
|
Diamond Grade (DG)
|
Has greater luminescence than EG and HIP and can be seen from greater distances. Ideal for potentially hazardous intersections, high traffic areas, and large signs that need to be seen from a distance.
|
Specifications:
|
Corners
|
standard federal radius
|
|
Finish
|
reflective
|
|
Hole diameter
|
3/8"
|
|
Hole placement
|
top and bottom centered
|
|
Hole quantity
|
2
|
|
Legend
|
Utility Work Ahead
|
|
Material
|
aluminum
|
|
Shape
|
diamond
|
|
Thickness
|
0.80"
|
|
MUTCD Identifier
|
W21-7
|
|
Ink Color
|
black
|
|
Sheeting color
|
orange
|
Resources:
Aluminum Utility Work Ahead Sign (W21-7)
Specifications
More Construction Signs
LOGIN 
