Berntsen W1ABC Aluminum Highway Survey Monument
The extendable Highway Monument was the first monument design developed by Berntsen. It was designed to meet the needs of the Wisconsin Department of Transportation for a compact and lightweight monument that offered good stability in the ground and more permanence than concrete. It was designed to be set in roadways. The monument can be extended upward as new pavement overlays are added.
- Designed to meet the need for a compact and lightweight monument that offers maximum stability in the ground and lighter in weight than concrete
- Extensions are available in several sizes to increase the height of the monument to a new pavement overlay without disturbing the original horizontal setting
- 4" (102 mm) diameter cast aluminum survey cap with permanent ceramic magnet attached to underside.
- Survey cap can be tightened or removed from the monument with specially designed top or side spanner wrenches
- 27½" (698 mm) cast aluminum alloy base
- Designed with two break-off points and a permanent vertically oriented magnet located below the bottom break-off point
Monument extensions are available in 1" (25mm), 2" (50mm), 3" (76mm) and 6" (152mm) lengths
A = 4" (102 mm)
B = 2" (51 mm)
D = 30" (762 mm)
E = 4.75" (121 mm)