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RR (Round-Rod) Anchors

The Round-Rod "RR" multi-helix anchors are used in areas where weak soil conditions exist and moderate holding capacities are required. All helix lead sections are 7 ft. long. Extension shafts may be required for installation to proper depth.

RR screw anchors consist of three galvanized components: Lead section, extension shaft (which includes an integral coupling), and the guy adapter. Each extension and guy adapter includes a highstrength bolt and nut.

Type RR (Round-Rod) anchors torque rating is 2,300 ft-lb. Ultimate tension rating for RR mechanical strength is 70,000 lb. Failure to install within 5° of alignment with the guy load will significantly lower strength.

Lead Sections

Catalog No. Length
Ft.(m)
Helix Combinations
In.(mm)
Std. Pkg.
/ Pallet
Holding Capacity - (lb. (kN)) vs. Soil Class
Class 7 Class 6 Class 5
012690AE 7 (2.1) 8 (203) - 10 (254) 1/20 19,000 (84.5) 23,000 (102.3) 27,000 (120.1)
012690AEJ 7 (2.1) 8 (203) - 10 (254) - 12 (305) 1/20 26,000 (115.7) 32,000 (142.3) 39,000 (173.5)
V1090007 7 (2.1) 10 (254) - 10 (254) - 10 (254) 1/15 25,000 (111.2) 31,000 (137.9) N/A
V1090006 7 (2.1) 10 (254) 1/20 17,000 (75.6) 21,000 (93.4) 24,000 (106.8)

Extensions

Catalog No. Nominal length Std. Pkg./Pallet
12696 3-1/2 ft. 1/50
12697 5 ft. 1/50
12698 7 ft. 1/30
12699 10 ft. 1/50
Click on Catalog Number to view sales drawing

Extensions with helices are available. Contact your Hubbell representative or ServiCenter for information.

Guy Adapters

Catalog No. Nominal length Description Std. Pkg./Pallet
C1020023 18" Thimbleye® 5/175
C1020024 18" Twineye® 5/250
C1020025 18" Tripleye® 5/250
C1100026 20" Threaded Stud 5/130
C1100041 18" Ovaleye 4/160
Click on Catalog Number to view sales drawing

For installation tool options, see catalog Section 4A.

LOAD CAPACITY1 BASED ON INSTALLATION TORQUE2
LOAD CAPACITY OF RR ANCHORS IN SOIL (POUNDS TENSION)

Helix Combinations Installation Torque (ft-lb)
1,500 2,000 2,300
10" 16,000 22,000 28,000
8" - 10" 17,000 23,000 29,000
10" - 10" - 10" 19,000 25,000 31,000
8" - 10" - 12" 19,000 25,000 31,000

1Load capacities listed above are ultimate values based on average test data and are offered as an application guide. Typical deflection at ultimate load ranges between 2 and 4 inches. The listed values should be reduced by an appropriate factor of safety. More specific data on soils and anchor performance in any site condition can be obtained by contacting Hubbell Power Systems.

2The torque values shown are steady values in homogeneous soils, not peak values that can occur in non-homogeneous soils such as glacial till or other rocky soils. The torque values shown are obtained by averaging the readings from the last 2 feet of anchor penetration.

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Anchoring