Top Security Sleeve for ¾" Aluminum Rod Monument
Berntsen's exclusive Top Security Sleeve 3-Dimensional Rod Monument System is specifically designed for high precision geodetic surveys. Its design helps protect against excessive movements in the control monument. The Berntsen extendible rods, when driven to refusal, provide excellent vertical stability. The unique Y-shaped design of the top security sleeve adds the second and third dimension to provide the most stable 3-D survey monument commercially available.
Simply drive standard Berntsen rods to refusal, slip on the grease-filled finned Top Security Sleeve (recommended sleeve length greater than maximum recorded local frost depth), back-fill around the fins with sand and tamp firmly. We recommend NO-TOX lubricating grease to fill the Top Security Sleeve. It is specially formulated to be non-toxic and environmentally safe. It is available in an easy to use cartridge that fits a standard "grease gun". One cartridge should be used for each Top Security Sleeve.
It's even extendible! Top Security Sleeves can also be connected together by Berntsen's exclusive End Cap Alignment bushings and a little PVC cement. When used in combination(s), nearly any length of support for the rod marker is possible.
BMAC6 - Access Cover for 5" & 6" PVC
MHDRDP1 - 3/4" Aluminum Datum Point
TSS3-B - 3' Top Security Sleeve w/ endcaps
TSSGREASE - No-Tox Grease for TSS3-B
MHDRR4 - ¾" x 4' Aluminum Rod w/ Thread
MHDRR3 - ¾" x 3' Aluminum Rod w/ Thread
MHDRR2 - ¾" x 2' Aluminum Rod w/ Thread
MHDRR1 - ¾" x 1' Aluminum Rod w/ Thread
MHDR12 - Spiral Point for ¾" Rod