truss arm with t-base

T-Base

t-base truss arm catalog page

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Details

RTA Single 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 Single Truss Arm T-Base

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

Pole HeightProduct No.Butt DiaWallOld Product No.
25′RTA25B7BFT18-**7″0.125”
RTA25C7BFT18-**7″0.156”[ 8′ ] 33-265
RTA25C7BFT1A-**7″0.156”[ 10′ ] 33-268
RTA25D7BFT18-**7″0.188”[ 8′ ] 33-181
RTA25D7BFT1A-**7″0.188”[ 10′ ] 33-184
RTA25D7BFT1C-**7″0.188”[ 12′ ] 33-187
RTA25D8BFT18-**8″0.188”[ 8′ ] 33-195
RTA25D8BFT1A-**8″0.188”[ 10′ ] 33-198
RTA25D8BFT1C-**8″0.188”[ 12′ ] 33-199
RTA25D8CFT1C-**8″0.188”[ 12′ ] 33-237
RTA25D8CFT1E-**8″0.188”[ 15′ ] 33-239
RTA25E8BFT1E-**8″0.219”[ 15′ ] 33-214
30′RTA30C8BFT18-**8″0.156”[ 8′ ] 33-601
RTA30C8BFT1A-**8″0.156”[ 10′ ] 33-604
RTA30C8CFT1A-**8″0.156”
RTA30C8CFT1C-**8″0.156”[ 12′ ] 33-619
RTA30C8CFT1E-**8″0.156”[ 15′ ] 33-623
RTA30D8BFT18-**8″0.188”[ 8′ ] 33-529
RTA30D8CFT18-**8″0.188”[ 8′ ] 33-567
RTA30D8BFT1A-**8″0.188”[ 10′ ] 33-532
RTA30D8CFT1A-**8″0.188”[ 10′ ] 33-570
RTA30D8CFT1C-**8″0.188”[ 12′ ] 33-573
RTA30D8CFT1E-**8″0.188”[ 15′ ] 33-575
35′RTA35D8BFT18-**8″0.188”[ 8′ ] 33-853
RTA35D8BFT1A-**8″0.188”[ 10′ ] 33-857
RTA35D8CFT1E-**8″0.188”[ 15′ ] 33-899
RTA35E8BFT18-**8″0.219”[ 8′ ] 33-867
RTA35E8CFT1A-**8″0.219”[ 10′ ] 33-906
RTA35F8CFT1C-**8″0.250”[ 12′ ] 33-921
RTA35F8CFT1E-**8″0.250”[ 15′ ] 33-923
40′RTA40E8BFT18-**8″0.219”[ 8′ ] 50706-027
RTA40E8BFT1A-**8″0.219”[ 10′ ] 50706-031
RTA40E8CFT1E-**8″0.219”[ 15′ ] 50706-051
RTA40F8CFT18-**8″0.250”[ 8′ ] 50706-068
RTA40F8CFT1A-**8″0.250”[ 10′ ] 50706-072
RTA40F8CFT1C-**8″0.250”[ 12′ ] 50706-075
RTA40F8CFT1E-**8″0.250”[ 15′ ] 50706-077
RTA40D1CFT1E-**10″0.188”[ 15′ ] 50706-090
RTA40E1CFT18-**10″0.219”
RTA40E1CFT1A-**10″0.219”[ 10′ ] 50706-098
RTA40E1CFT1C-**10″0.219”
RTA40E1CFT1E-**10″0.219”[ 15′ ] 50706-103
45′RTA45E8CFT1E-**8″0.219”
RTA45F8CFT1A-**8″0.250”
RTA45F8CFT1E-**8″0.250”
RTA45E1CFT1A-**10″0.219”
RTA45E1CFT1E-**10″0.219”
RTA45F1CFT1A-**10″0.250”
RTA45F1CFT1E-**10″0.250”