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Famous Monuments

Prices
$80.00
1 - 10
$76.50
11 - 24
$74.00
25 - 99
$70.00
100 or more
Prices
$85.00
1 - 10
$80.00
11 - 24
$76.50
25 - 99
$72.00
100 or more

Benchmark Access Covers & Survey Boxes

Berntsen's Aluminum Bench Mark Access Covers (BMAC) are based on designs developed for the NGS bench mark. Access covers are usually used to provide a protective cover for sectional rod monuments (stainless steel or aluminum rods) like those used for geodetic control or GPS.

Berntsen BMAC1 monument box access coverBerntsen offers a variety of models of the BMAC Bench Mark Access Covers:

Model BMAC-1, the latest refinement of the original concept, is designed to fit over a section of 5 inch (127mm) PVC Well Casing. Due to the exposed (raised) dual (2) hinge design, the BMAC-1 is recommended only for general use on open land. A ring of concrete is usually poured around the BMAC outer ring and PVC pipe.

Soon after the introduction of BMAC-1, our customers requested a more versatile access cover. one that could be used with standard 6" (152mm) Schedule 40 PVC pipe. Model BMAC-6 (fits inside 6" PVC pipe) are further refinements of the original design. Most notable changes are a much more heavy-duty design with significantly more material at critical points and a stronger and fully recessed hinge. This cover is therefore suitable for use in pavement areas such as streets or highways, as well as on open land. Like the BMAC-1, a ring of concrete is often poured around the cover's outer ring.

We also offer the BMAC6 with a tamper-proof screw that requires a special tool to open.

Berntsen BMAC Acees Covers & Survey Boxes

Berntsen International, Inc.
  • 1-800-518-0934
  • All other countries:
  • +1-608-249-8549
  • PO Box 8670
  • Madison, WI 53708-8670
We accept VISA, Master Card, American Express and Discover Card.