double truss arm with t-base

T-Base

t-base double truss arm catalog page

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Details

RTA Double Truss Arm T-Base Pole Specifications

Pole

The pole shaft will be constructed of seamless extruded tube of 6063 Aluminum Alloy per the requirements of ASTM B221. The shaft assembly shall be full-length heat treated after base weld to produce a T6 temper.

Base Style

Cast Aluminum Transformer Base (T-Base) of Alloy 356-T6 with Aluminum Door and Stainless Steel Hex Head Screw. FHWA Approved Breakaway.

Handhole

6″-10″ Butt Diameters – Tapered Door Opening (9-3/4″ W Base x 9-1/4″ W Top x 11-3/4″ H) with Flush Mount Aluminum Cover and Stainless Steel Hex Head Screw. Grounding Provisions tapped 1/4″-20NC and 1/2″-13NC are provided.
T-Base Cover On

Anchorage

Base Anchorage includes four (4) L-shaped Steel Anchor Bolts conforming to AASHTO M314-90 Grade 55, four (4) each Heavy-Duty Flat Washers, Lock Washers, and Hex Nuts (all components Galvanized Steel). Ten inches (10″) of threaded end will be galvanized per ASTM A153. Top Connecting Hardware includes four (4) each 1″-8NC x 3-3/4″ Hex Head Bolts, Flat Washers, Heavy-Duty Flat Washers, Lock Washers, and Hex Nuts (all components Galvanized Steel). A bolt circle template will be provided.

Base and Anchorage Details
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T-base anchor bolts in the ground

Vibration Damper

When determined necessary by Hapco, a Vibration Damper will be factory-installed inside the pole shaft. Customer specification of the damper is available.

Vibration Dampers
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Satin Aluminum Finish

Pole surface will contain a uniform Brushed Aluminum natural finish. Finish to be achieved utilizing specially formulated abrasives in a multi-pass, rotary sanding operation.

Powder Coat Finish

Coating material will be a thermosetting polyester AAMA 2604 Super Durable powder electrostatically applied, oven cured and bonded in a closed loop, automated system. Minimum thickness of finish will be two (2) mils. Hapco’s Powder Coat Finish Warranty on aluminum poles is five (5) years.

Finish Options
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Pole Shaft Warranty

Hapco warrants its aluminum pole assemblies for their lifetime to be free of defects in material and workmanship.

Hapco Lifetime Pole Assembly Warranty
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Specification Drawings – RTA Double Truss Arm T-Base

Click on the Product No. to download interactive PDF specification drawing.

Pole HeightProduct No.Butt DiaWallOld Product No.
25′RTA25C8BFT2A-**8″0.156”[ 10′ ] 34-280
RTA25D8BFT28-**8″0.188”[ 8′ ] 34-195
RTA25D8BFT2A-**8″0.188”[ 10′ ] 34-198
RTA25D8BFT2C-**8″0.188”[ 12′ ] 34-199
RTA25D8BFT2E-**8″0.188”[ 15′ ] 34-202
RTA25E8BFT2C-**8″0.219”[ 12′ ] 34-212
RTA25E8CFT2E-**8″0.219”[ 15′ ] 34-251
30′RTA30D8BFT28-**8″0.188”[ 8′ ] 34-529
RTA30D8BFT2A-**8″0.188”[ 10′ ] 34-532
RTA30E8BFT2C-**8″0.219”[ 12′ ] 34-547
RTA30F8BFT28-**8″0.250”[ 8′ ] 34-555
RTA30F8BFT2A-**8″0.250”[ 10′ ] 34-558
RTA30F8BFT2C-**8″0.250”[ 12′ ] 34-559
RTA30F8BFT2E-**8″0.250”[ 15′ ] 34-562
RTA30D1CFT2E-**10″0.188”[ 15′ ] 34-635
35′RTA35F8BFT28-**8″0.250”[ 8′ ] 34-877
RTA35F8BFT2A-**8″0.250”[ 10′ ] 34-881
RTA35D1CFT28-**10″0.188”[ 8′ ] 34-951
RTA35D1CFT2C-**10″0.188”[ 12′ ] 34-955
RTA35D1CFT2E-**10″0.188”[ 15′ ] 34-959
RTA35E1CFT2A-**10″0.219”[ 10′ ] 34-966
RTA35F1CFT2C-**10″0.250”[ 12′ ] 34-981
RTA35F1CFT2E-**10″0.250”[ 15′ ] 34-983
40′RTA40F8BFT28-**8″0.250”[ 8′ ] 50707-053
RTA40F8CFT2A-**8″0.250”[ 10′ ] 50707-045
RTA40D1CFT2A-**10″0.188”[ 10′ ] 50707-085
RTA40D1CFT2C-**10″0.188”[ 12′ ] 50707-086
RTA40F1CFT28-**10″0.250”[ 8′ ] 50707-107
RTA40F1CFT2A-**10″0.250”[ 10′ ] 50707-111
RTA40F1CFT2C-**10″0.250”[ 12′ ] 50707-114
RTA40F1CFT2E-**10″0.250”[ 15′ ] 50707-116
45′RTA45F8BFT28-**8″0.250”
RTA45D1CFT2A-**10″0.188”
RTA45D1CFT2C-**10″0.188”
RTA45F1CFT28-**10″0.250”
RTA45F1CFT2A-**10″0.250”
RTA45F1CFT2C-**10″0.250”
RTA45F1CFT2E-**10″0.250”
RTA45G1CFT2C-**10″0.312”
RTA45G1CFT2E-**10″0.312”