Street & Area Lighting

ST3 (Truss Arm) Carbon Steel

ST3 (Truss Arm)
Get a QuoteRequest a quote online View Catalog

Anchor Bolts

Anchor bolts conform to ASTM F1554 Grade-55 standards. Bolts have an “L” bend at one end and a minimum of 12” galvanized threads on the other end. Two galvanized flat washers per ASTM F436 and two galvanized hexagonal nuts per ASTM A563 Grade DH are provided with each bolt.

Anchor Base

The base plate is fabricated from ASTM A36 carbon steel. The base is fabricated with slotted bolt holes to allow for a +/- 0.5” variance in listed nominal bolt circle size. The base plate telescopes the pole shaft and is circumferentially welded top and bottom.

High Base

Each pole assembly is fashioned with a Millerbernd Manufacturing Company High Base. The base is fabricated from the same material as the pole shaft and stands 27 inches tall. The pole shaft is slip fitted and welded to the base.

Shaft

The pole shaft conforms to ASTM A1011 Grade 50 carbon steel standards.

Handhole

A reinforced handhole with cover, grounding lug, and hardware is provided with each pole assembly. Pole assemblies fabricated with a High-Base are provided with a flush mounted handhole with cover, grounding lug, and hardware.

Arms

ST3 arms are fabricated from 2” (2.38” O.D.) schedule 40 pipe with a supporting brace fabricated from ASTM A36 carbon steel plate. Each ST3 arm attaches to the pole shaft with a cast steel, mating 4-bolt simplex bracket (optional cast steel, mating 1-bolt (1BS) or 2-bolt (2BS) simplex brackets are available. ST3 arms have a rise of 5 feet from the pole top.

Finishing

Carbon steel poles may be specified as hot-dip galvanized per ASTM A123 and/or finish painted with our standard Millerbond Wet Coat Finish.

Hardware

All hardware and fasteners are supplied with each pole assembly. All structural fasteners are galvanized high-strength carbon steel.

Tap to expand details below

  • Anchor Bolts

    Anchor Bolts

    Anchor bolts conform to ASTM F1554 Grade-55 standards. Bolts have an “L” bend at one end and a minimum of 12” galvanized threads on the other end. Two galvanized flat washers per ASTM F436 and two galvanized hexagonal nuts per ASTM A563 Grade DH are provided with each bolt.

  • Anchor Base

    Anchor Base

    The base plate is fabricated from ASTM A36 carbon steel. The base is fabricated with slotted bolt holes to allow for a +/- 0.5” variance in listed nominal bolt circle size. The base plate telescopes the pole shaft and is circumferentially welded top and bottom.

  • High Base

    High Base

    Each pole assembly is fashioned with a Millerbernd Manufacturing Company High Base. The base is fabricated from the same material as the pole shaft and stands 27 inches tall. The pole shaft is slip fitted and welded to the base.

  • Shaft

    Shaft

    The pole shaft conforms to ASTM A1011 Grade 50 carbon steel standards.

  • Handhole

    Handhole

    A reinforced handhole with cover, grounding lug, and hardware is provided with each pole assembly. Pole assemblies fabricated with a High-Base are provided with a flush mounted handhole with cover, grounding lug, and hardware.

  • Arms

    Arms

    ST3 arms are fabricated from 2” (2.38” O.D.) schedule 40 pipe with a supporting brace fabricated from ASTM A36 carbon steel plate. Each ST3 arm attaches to the pole shaft with a cast steel, mating 4-bolt simplex bracket (optional cast steel, mating 1-bolt (1BS) or 2-bolt (2BS) simplex brackets are available. ST3 arms have a rise of 5 feet from the pole top.

  • Finishing

    Finishing

    Carbon steel poles may be specified as hot-dip galvanized per ASTM A123 and/or finish painted with our standard Millerbond Wet Coat Finish.

  • Hardware

    Hardware

    All hardware and fasteners are supplied with each pole assembly. All structural fasteners are galvanized high-strength carbon steel.

Get a QuoteRequest a quote online View Catalog

Options & Detail

  • Cross Section Options
    Cross Section: Round, Octagonal, 16-Sided
  • Twin Arm Arrangement
    Twin Arm Arrangement
  • Arm attachment options
    Arm attachment options
Base Options
  • Anchor Base (A)
  • High Base (H)

Specifications

Use horizontal scroll bar at bottom of each table to view all columns

Swipe to view all columns

Anchor Base

PART # MOUNTING
HEIGHT
(FT)		 MAX ARM
LENGTH
(FT)		 WEIGHT
(LBS.)		 BASE O.D.
(IN)		 TOP O.D.
(IN)		 BOLT CIRCLE
+/- 0.5
(IN)		 BASE
SQUARE
(IN)		 MAX EPA
90 MPH		 MAX EPA
100 MPH		 MAX EPA
110 MPH		 MAX EPA
120 MPH		 MAX EPA
130 MPH		 MAX EPA
140 MPH		 MAX EPA
150 MPH
ST3-081-A-065-A-250 25 8 217 6.5 3.7 9.5 9.5 6.18 6.18 6.18 5.51 4.65 3.91 3.28
ST3-081-A-070-a-250 25 8 232 7 4.2 10 10 8.84 7.63 6.51 5.51 4.65 3.91 3.28
ST3-081-A-070-A-300 30 8 256 7 3.5 10 10 4.77 4.77 4.77 4.77 4.45 3.32 2.39
ST3-081-A-075-A-300 30 8 275 7.5 4 10.5 10.5 6.99 6.99 6.28 5.3 4.45 3.73 3.12
ST3-081-A-080-A-350 35 8 301 8 3.8 11 11 5.64 5.64 5.64 5.12 4.29 3.54 2.53
ST3-081-A-085-A-350 35 8 342 8.5 4.3 11.5 11.5 7.93 7.21 6.1 5.12 4.29 3.58 2.98
ST3-081-A-085-A-400 40 8 312 8.5 3.6 11.5 11.5 4.61 4.61 4.61 4.61 3.63 2.5 1.56
ST3-081-A-090-A-400 40 8 326 9 4.1 12 12 6.61 6.61 5.93 4.97 4.15 3.43 2.39
ST3-081-A-100-A-500 50 8 503 10 3.7 13.5 13.5 4.65 4.65 4.55 2.95 1.74 0.75
ST3-151-A-065-A-250 25 15 256 6.5 3.7 9.5 9.5 2.13 2.13 1.9 1.33 0.85
ST3-151-A-070-A-250 25 15 271 7 4.2 10 10 3.25 2.54 1.9 1.33 0.85
ST3-151-A-070-A-300 30 15 295 7 3.5 10 10 1.38 1.38 1.38 1.21 0.74
ST3-151-A-075-A-300 30 15 314 7.5 4 10.5 10.5 2.56 2.41 1.77 1.21 0.74
ST3-151-A-080-A-350 35 15 359 8 3.8 11 11 1.85 1.85 1.67 1.11 0.65
ST3-151-A-085-A-350 35 15 381 8.5 4.3 11.5 11.5 3.02 2.3 1.67 1.11 0.65
ST3-151-A-090-A-400 40 15 431 9 4.1 12 12 2.36 2.21 1.58 1.03 0.57
ST3-151-A-100-A-500 50 15 542 10 3.7 13.5 13.5 1.32 1.32 1.32 0.8

High-Base

PART # MOUNTING
HEIGHT
(FT)		 MAX ARM
LENGTH
(FT)		 WEIGHT
(LBS.)		 BASE O.D.
(IN)		 TOP O.D.
(IN)		 BOLT CIRCLE
(IN)		 BASE
SQUARE
(IN)		 MAX EPA
90 MPH		 MAX EPA
100 MPH		 MAX EPA
110 MPH		 MAX EPA
120 MPH		 MAX EPA
130 MPH		 MAX EPA
140 MPH		 MAX EPA
150 MPH
ST3-081-H-070-A-250 25 8 225 7 4 15 15 7.94 7.63 6.51 5.51 4.65 3.91 3.2
ST3-081-H-086-A-300 30 8 301 8.6 4 15 15 8.23 7.4 6.28 5.3 4.45 3.73 3.12
ST3-081-H-096-A-350 35 8 330 9.6 4 15 15 7.75 7.21 6.1 5.12 4.29 3.58 2.71
ST3-081-H-096-A-400 40 8 339 9.6 4 15 15 6.41 6.41 5.93 4.71
ST3-081-H-106-A-500 50 8 472 10.6 4 15 15 5.45 5.45 3.16 0.84
ST3-151-H-070-A-250 25 15 264 7 4 15 15 3.08 2.54 1.9 1.33 0.85
ST3-151-H-086-A-300 30 15 340 8.6 4 15 15 3.12 2.41 1.77 1.21 0.74
ST3-151-H-096-A-350 35 15 369 9.6 4 15 15 2.97 2.3 1.67 1.11 0.65
ST3-151-H-096-A-400 40 15 438 9.6 4 15 15 2.26 2.21 1.58 1.03 0.57
ST3-151-H-106-A-500 50 15 554 10.6 4 15 15 1.74 1.74 1.15
  1. Variations from above sizes are available. Consult factory for allowable weight and EPA ratings for custom sizes.
  2. Charts are for single arm configurations only. Consult factory for allowable weight and EPA ratings on twin arm arrangements.
  3. Charted weights include the base, pole shaft, and luminaire mounting arm.
  4. Unless specified otherwise, luminaire mounting arms attach to the pole shaft with a 4-bolt simplex bracket. To specificy a different bracket, insert the bracket part number under options.
  5. The “Base O.D.” measurement for direct-embedded structures is taken at the ground line.