double truss arm with 4-bolt base

4-Bolt Base

4-bolt base double truss arm catalog page

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Details

RTA Double Mast Arm 4-Bolt 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

4-Bolt Cast Aluminum Base Flange of Alloy 356-T6 with Aluminum Bolt Covers (Alloy 356-F) and Stainless Steel Hex Head Attaching Screws.

 

Handhole

6″ Butt Diameter – Reinforced, 3″ x 5″ curved Cast Aluminum Frame (Alloy 356-T6) with Aluminum Door and two (2) SS Hex Head Screws. A Grounding Provision incorporating a 3/8″ diameter hole is provided opposite the Handhole.

7″+ Butt Diameters – Reinforced, 4″ x 6″ curved Cast Aluminum Frame (Alloy 356-T6) with Aluminum Door and two (2) SS Hex Head Screws. Reinforced Frame will contain a tapped 3/8″-16NC Grounding Provision.

Anchorage

Anchorage Kit will include four (4) L-shaped Steel Anchor Bolts conforming to AASHTO M314-90 Grade 55. Ten inches (10″) of threaded end will be galvanized per ASTM A153. Kits will contain four (4) Hex Nuts, four (4) Lock Washers, and four (4) Flat Washers (all components Galvanized Steel). A bolt circle template will be provided.

Base and Anchorage Details
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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 Mast Arm 4-Bolt Base

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

Pole HeightProduct No.Butt DiaWallOld Product No.
25′RTA25C7B4T28-**7″0.156”[ 8′ ] 32-265
RTA25C7B4T2A-**7″0.156”[ 10′ ] 32-268
RTA25C7B4T2C-**7″0.156”[ 12′ ] 32-271
RTA25C7B4T2E-**7″0.156”[ 15′ ] 32-275
RTA25D7B4T28-**7″0.188”[ 8′ ] 32-181
RTA25C8B4T28-**8″0.156”[ 8′ ] 32-277
RTA25C8B4T2A-**8″0.156”[ 10′ ] 32-280
RTA25C8B4T2C-**8″0.156”[ 12′ ] 32-283
RTA25C8B4T2E-**8″0.156”[ 15′ ] 32-287
RTA25D8B4T28-**8″0.188”[ 8′ ] 32-195
RTA25D8B4T2A-**8″0.188”[ 10′ ] 32-198
RTA25D8B4T2C-**8″0.188”[ 12′ ] 32-199
RTA25D8B4T2E-**8″0.188”[ 15′ ] 32-202
RTA25E8B4T2A-**8″0.219”[ 10′ ] 32-210
RTA25E8B4T2C-**8″0.219”[ 12′ ] 32-212
RTA25E8B4T2E-**8″0.219”[ 15′ ] 32-214
RTA25E8C4T2E-**8″0.219”[ 15′ ] 32-251
30′RTA30C7B4T28-**7″0.156”[ 8′ ] 32-661
RTA30C7B4T2A-**7″0.156”[ 10′ ] 32-664
RTA30C8B4T28-**8″0.156”[ 8′ ] 32-601
RTA30C8B4T2A-**8″0.156”[ 10′ ] 32-604
RTA30C8B4T2C-**8″0.156”[ 12′ ] 32-607
RTA30D8B4T28-**8″0.188”[ 8′ ] 32-529
RTA30D8B4T2A-**8″0.188”[ 10′ ] 32-532
RTA30D8B4T2C-**8″0.188”[ 12′ ] 32-535
RTA30D8B4T2E-**8″0.188”[ 15′ ] 32-538
RTA30E8B4T2A-**8″0.219”[ 10′ ] 32-544
RTA30E8B4T2C-**8″0.219”[ 12′ ] 32-547
RTA30F8B4T28-**8″0.250”[ 8′ ] 32-555
RTA30F8B4T2A-**8″0.250”[ 10′ ] 32-558
RTA30F8B4T2C-**8″0.250”[ 12′ ] 32-559
RTA30F8B4T2E-**8″0.250”[ 15′ ] 32-562
RTA30D1C4T28-**10″0.188”[ 8′ ] 32-625
RTA30D1C4T2A-**10″0.188”[ 10′ ] 32-628
RTA30D1C4T2C-**10″0.188”[ 12′ ] 32-631
RTA30D1C4T2E-**10″0.188”[ 15′ ] 32-635
35′RTA35D8B4T28-**8″0.188”[ 8′ ] 32-853
RTA35D8B4T2A-**8″0.188”[ 10′ ] 32-856
RTA35D8B4T2C-**8″0.188”[ 12′ ] 32-859
RTA35D8B4T2E-**8″0.188”[ 15′ ] 32-862
RTA35F8B4T28-**8″0.250”[ 8′ ] 32-877
RTA35F8B4T2A-**8″0.250”[ 10′ ] 32-880
RTA35F8B4T2C-**8″0.250”[ 12′ ] 32-883
RTA35F8B4T2E-**8″0.250”[ 15′ ] 32-886
RTA35D1C4T28-**10″0.188”[ 8′ ] 32-951
RTA35D1C4T2A-**10″0.188”[ 10′ ] 32-952
RTA35D1C4T2E-**10″0.188”[ 15′ ] 32-959
RTA35E1C4T2A-**10″0.219”[ 10′ ] 32-966
RTA35F1C4T28-**10″0.250”[ 8′ ] 32-973
RTA35F1C4T2A-**10″0.250”[ 10′ ] 32-976
RTA35F1C4T2C-**10″0.250”[ 12′ ] 32-981
RTA35F1C4T2E-**10″0.250”[ 15′ ] 32-983
40′RTA40D8C4T28-**8″0.188”[ 8′ ] 50705-014
RTA40D8C4T2A-**8″0.188”[ 10′ ] 50705-045
RTA40D8B4T2C-**8″0.188”[ 12′ ] 50705-010
RTA40F8B4T28-**8″0.250”[ 8′ ] 50705-053
RTA40F8B4T2A-**8″0.250”[ 10′ ] 50705-058
RTA40F8B4T2C-**8″0.250”[ 12′ ] 50705-062
RTA40F8B4T2E-**8″0.250”[ 15′ ] 50705-063
RTA40D1C4T28-**10″0.188”[ 8′ ] 50705-079
RTA40D1C4T2A-**10″0.188”[ 10′ ] 50705-085
RTA40D1C4T2C-**10″0.188”[ 12′ ] 50705-086
RTA40D1C4T2E-**10″0.188”[ 15′ ] 50705-090
RTA40F1C4T28-**10″0.250”[ 8′ ] 50705-107
RTA40F1C4T2A-**10″0.250”[ 10′ ] 50705-111
RTA40F1C4T2C-**10″0.250”[ 12′ ] 50705-114
RTA40F1C4T2E-**10″0.250”[ 15′ ] 50705-116