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A = 3 1/4" (83 mm)
B = 1 1/4" (38 mm)
C = 3/8" (10 mm ), 1/2" (13 mm), 5/8" (16 mm),
3/4" (19 mm), 7/8" (22 mm), and 1" (25 mm)
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All Berntsen aluminum survey caps for rebar are forged from 6000 series aluminum alloy that won't chip, crack, or break. They feature the SureGrip™ plastic insulator that locks the cap tight on to the rebar or pipe and helps prevent dissimilar metal corrosion. They feature a deep hex socket that won't "wobble" when tapped on to the rebar.
A good survey cap for rebar or pipe must virtually eliminate dissimilar metal corrosion. What typically happens is the survey cap loosens over a short period of time. This confirms metallurgical theory. Aluminum is less "noble" than steel and an electrical current will actually flow from the aluminum (+) to the steel (-). Corrosion will occur in the anode (+) area of the battery like combination of metals in the presence of moisture (air or soil acting like an electrolyte).
Berntsen originated the SureGrip™ insulator/wedge which effectively isolates the survey cap from the steel and de-forms around the ribs of the rebar. The hex shape fills with the deformed plastic material and the survey cap is locked on with a super tight compression fit. Great force is required to remove the cap.
For installation instructions Click Here
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RBH3325 - |
3 1/4” Domed cap for 3/8” Rebar (Aluminum) |
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RBH4325 - |
3 1/4” Domed cap for 1/2” Rebar (Aluminum) |
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RBD5325 - |
3 1/4” Domed cap for 5/8” Rebar (Aluminum) |
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RBX6325 - |
3 1/4” Domed cap for 3/4” Rebar (Aluminum) |
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RBX7325 - |
3 1/4” Domed cap for 7/8” Rebar (Aluminum) |
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RBX8325 - |
3 1/4” Domed cap for 1” Rebar (Aluminum) |
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