Street & Area Lighting

ST3 (Truss Arm) Stainless Steel

ST3 (Truss Arm)
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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 A240 stainless 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 A240 Grade 201LN stainless 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 A240 stainless 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

Stainless steel poles may be specified as frost (rust resistant stainless steel shot blast)
finished 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 18-8 stainless steel.

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  • 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 A240 stainless 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 A240 Grade 201LN stainless 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 A240 stainless 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

    Stainless steel poles may be specified as frost (rust resistant stainless steel shot blast)
    finished 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 18-8 stainless steel.

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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

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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-E-250 25 8 147 6.5 3.7 9.5 9.5 3.45 3.45 3.12 1.99 1.15
ST3-081-A-070-E-250 25 8 158 7 4.2 10 10 4.73 3.99 3.31 3.02 2.05 1.28 0.64
ST3-081-A-070-E-300 30 8 172 7 3.5 10 10 2.58 2.58 1.58 0.58
ST3-081-A-075-E-300 30 8 185 7.5 4 10.5 10.5 3.94 3.85 2.51 1.46 0.65
ST3-081-A-080-E-350 35 8 213 8 3.8 11 11 3.11 2.4 1.08
ST3-081-A-085-E-350 35 8 228 8.5 4.3 11.5 11.5 4.49 3.42 2.04 1.01
ST3-081-A-085-F-350 35 8 301 8.5 4.3 11.5 11.5 4.49 3.74 3.06 2.47 1.96 1.53 1.17
ST3-081-A-090-E-400 40 8 246 9 4.1 12 12 3.7 1.92 0.66
ST3-081-A-090-F-400 40 8 327 9 4.1 12 12 4.39 3.64 2.96 2.38 1.88 1.46 1.1
ST3-081-A-100-F-500 50 8 447 10 3.7 13.5 13.5 4.18 3.47 2.8 2.23 1.19
ST3-101-A-065-E-250 25 10 153 6.5 3.7 9.5 9.5 2.43 2.43 2.19 1.56 0.74
ST3-101-A-070-E-250 25 10 164 7 4.2 10 10 3.36 2.75 2.19 1.7 1.28 0.86
ST3-101-A-070-E-300 30 10 178 7 3.5 10 10 1.73 1.73 1.14
ST3-101-A-075-E-300 30 10 191 7.5 4 10.5 10.5 2.82 2.64 2.06 1.02
ST3-101-A-080-E-350 35 10 219 8 3.8 11 11 2.15 1.94 0.63
ST3-101-A-085-E-350 35 10 234 8.5 4.3 11.5 11.5 3.16 2.55 1.58 0.57
ST3-101-A-085-F-350 35 10 308 8.5 4.3 11.5 11.5 3.16 2.55 1.99 1.51 1.1 0.75
ST3-101-A-090-E-400 40 10 287 9 4.1 12 12 2.46 1.46
ST3-101-A-090-F-400 40 10 374 9 4.1 12 12 3.08 2.46 1.91 1.43 1.03 0.69
ST3-101-A-100-F-500 50 10 478 10 3.7 13.5 13.5 2.94 2.32 1.78 1.31 0.72

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-067-E-250 25 8 148 6.7 4 15 15 4.2 3.99 2.88 1.68 0.71
ST3-081-H-081-E-300 30 8 184 8.1 4 15 15 4.32 3.85 2.56 1.28
ST3-081-H-094-E-350 35 8 207 9.4 4 15 15 4.49 3.74 3.06 1.9 0.76
ST3-081-H-094-F-350 35 8 311 9.4 4 15 15 4.49 3.74 3.06 2.47 1.96 1.53 1.17
ST3-081-H-094-E-400 40 8 256 9.4 4 15 15 3.9 2.45 0.81
ST3-081-H-094-F-400 40 8 339 9.4 4 15 15 4.39 3.64 2.96 2.38 1.88 1.46 1.06
ST3-081-H-105-F-500 50 8 461 10.5 4 17 17 4.22 3.47 2.8 1.99 0.51
ST3-101-H-067-E-250 25 10 154 6.7 4 15 15 3.02 2.75 2.19 1.29
ST3-101-H-081-E-300 30 10 190 8.1 4 15 15 3.12 2.64 2.08 0.89
ST3-101-H-094-E-350 35 10 214 9.4 4 15 15 3.16 2.55 1.99 1.49
ST3-101-H-094-F-350 35 10 320 9.4 4 15 15 3.16 2.55 1.99 1.51 1.1 0.75
ST3-101-H-094-E-400 40 10 265 9.4 4 15 15 2.78 2.02
ST3-101-H-094-F-400 40 10 348 9.4 4 15 15 3.08 2.46 1.91 1.43 1.03 0.69
ST3-101-H-105-F-500 50 10 470 10.5 4 17 17 2.94 2.32 1.78 1.31
  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. All multi-sided stainless steel poles with a mounting height of 35 feet or more are 16-sided.
  6. Stainless steel structures with a round cross section must be finish painted with our Millerbond wet coat finish.
  7. Stainless steel break-away High-Base option available. For a break-away High-Base, insert “BKB” as an option.
  8. The “Base O.D.” measurement for direct-embedded structures is taken at the ground line.