double mast 4-bolt base

4-Bolt Base

rta double mast 4-bolt base

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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.
20′RTA20C6B4M24-**6″0.156”[ 4′ ] 22-082
RTA20C6B4M26-**6″0.156”[ 6′ ] 22-085
RTA20C6B4M28-**6″0.156”[ 8′ ] 22-087
RTA20D6B4M24-**6″0.188”[ 4′ ] 22-002
RTA20D6B4M26-**6″0.188”[ 6′ ] 22-005
RTA20D6B4M28-**6″0.188”[ 8′ ] 22-007
RTA20C7B4M26-**7″0.156”[ 6′ ] 22-095
RTA20C7B4M28-**7″0.156”[ 8′ ] 22-097
RTA20D7B4M26-**7″0.188”[ 6′ ] 22-015
RTA20D7B4M28-**7″0.188”[ 8′ ] 22-017
25′RTA25C6B4M24-**6″0.156”[ 4′ ] 22-412
RTA25D6B4M24-**6″0.188”[ 4′ ] 22-282
RTA25D6B4M28-**6″0.188”[ 8′ ] 22-287
RTA25C7B4M24-**7″0.156”[ 4′ ] 22-362
RTA25C7B4M26-**7″0.156”[ 6′ ] 22-365
RTA25C7B4M28-**7″0.156”[ 8′ ] 22-367
RTA25D7B4M24-**7″0.188”[ 4′ ] 22-292
RTA25D7B4M26-**7″0.188”[ 6′ ] 22-295
RTA25D7B4M28-**7″0.188”[ 8′ ] 22-297
RTA25C8B4M24-**8″0.156”[ 4′ ] 22-372
RTA25C8B4M26-**8″0.156”[ 6′ ] 22-375
RTA25D8B4M26-**8″0.188”[ 6′ ] 22-305
RTA25D8B4M28-**8″0.188”[ 8′ ] 22-307
30′RTA30C7B4M24-**7″0.156”[ 4′ ] 22-692
RTA30C7B4M26-**7″0.156”[ 6′ ] 22-695
RTA30D7B4M24-**7″0.188”[ 4′ ] 22-572
RTA30C8B4M24-**8″0.156”[ 4′ ] 22-642
RTA30C8B4M26-**8″0.156”[ 6′ ] 22-645
RTA30C8B4M28-**8″0.156”[ 8′ ] 22-647
RTA30D8B4M24-**8″0.188”[ 4′ ] 22-582
RTA30D8B4M26-**8″0.188”[ 6′ ] 22-585
RTA30D8B4M28-**8″0.188”[ 8′ ] 22-587
RTA30F8B4M26-**8″0.250”[ 6′ ] 22-605
RTA30F8B4M28-**8″0.250”[ 8′ ] 22-607
RTA30D1C4M24-**10″0.188”[ 4′ ] 22-662
35′RTA35C8B4M24-**8″0.156”[ 4′ ] 22-922
RTA35D8B4M24-**8″0.188”[ 4′ ] 22-862
RTA35D8B4M26-**8″0.188”[ 6′ ] 22-865
RTA35D8B4M28-**8″0.188”[ 8′ ] 22-867
RTA35E8B4M26-**8″0.219”[ 6′ ] 22-875
RTA35F8B4M24-**8″0.250”[ 4′ ] 22-882
RTA35F8B4M26-**8″0.250”[ 6′ ] 22-885
RTA35F8B4M28-**8″0.250”[ 8′ ] 22-887
RTA35D1C4M24-**10″0.188”[ 4′ ] 22-942
RTA35D1C4M26-**10″0.188”[ 6′ ] 22-945
RTA35D1C4M28-**10″0.188”[ 8′ ] 22-947
40′RTA40D8B4M24-**8″0.188”[ 4′ ] 50701-041
RTA40D8B4M26-**8″0.188”[ 6′ ] 50701-001
RTA40F8B4M24-**8″0.250”[ 4′ ] 50701-045
RTA40F8B4M26-**8″0.250”[ 6′ ] 50701-009
RTA40F8B4M28-**8″0.250”[ 8′ ] 50701-010
RTA40D1C4M26-**10″0.188”[ 6′ ] 50701-013
RTA40D1C4M28-**10″0.188”[ 8′ ] 50701-014
RTA40E1C4M26-**10″0.219”[ 6′ ] 50701-015
RTA40E1C4M28-**10″0.219”[ 8′ ] 50701-016
RTA40F1C4M26-**10″0.250”[ 6′ ] 50701-017
RTA40F1C4M28-**10″0.250”[ 8′ ] 50701-018