SPECIFICATIONS

GENERAL SPECIFICATIONS for 'RTA' Area and Highway Lighting Poles

Design:
The complete lighting standard, including brackets, shaft, pole base and transformer base shall be designed to support luminaires with Effective Projected Areas (EPA) ratings as designated for various wind speeds. The design criteria used shall be based on the 1985 edition of the' American Association of State Highway and Transportation Officials', " Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals." The aluminum alloys designated herein are per the Aluminum Association Standards.

Shaft:
The shaft shall be fabricated from extruded aluminum alloy 6063 per ASTM B221, B241 or B429 and shall be fully heat treated to achieve a T6 temper after the assembly has been welded. Ground mounted and embedded poles shall have a handhole (access) located between 12" and 18" above the base. Handholes shall have an aluminum reinforcing frame to maintain the structural integrity of the pole. An electrical grounding lug shall be provided near the opening for easy wire attachment. The aluminum handhole cover shall be fastened by means of stainless steel hardware. Handhole sizes shall be 2" x 4 1/2" for poles with a 4" and 5" base diameter, 3" x 5" for 6" and 7" poles and 4" x 6" for poles 8" and larger. All poles shall have a rotary satin brush finish.
The shaft shall have sufficient strength to keep deflection of the luminaire to less than 5% of the shaft length.

Pole Base Flange:
The pole base shall be of cast aluminum alloy 356 per ASTM B26 or B108 and be of one piece construction. The base shall be heat treated to a T6 temper after welding. The base/shaft connection shall have a tight tolerance fit before welding. The shaft shall be joined to the base with two circumferential welds at the top and bottom of the base. The assembly shall be heat treated after welding to achieve maximum material r properties. Aluminum anchor bolt covers, bolt caps or base covers shall be provided for the appropriate base style.

Transformer Base (T-Base):
The transformer base assembly shall be of a one or two piece design made from permanent mold castings of 356 aluminum alloy per ASTM B108 and fully heat treated to a T6 temper. A removable aluminum or ABS plastic access door shall be fastened with an aluminum latch and stainless steel screw. A method for electrical grounding shall be provided. Galvanized steel fiatwashers of sufficient size shall be provided for proper load distribution. Connecting bolts to fasten the pole to the T-Base shall be per ASTM A307. All bolts, nuts, lockwashers and fiatwashers shall be galvanized per ASTM A153.

When required, a base, either T-Base or Pole Base style, approved by the Federal Highway Administration as a breakaway device meeting the requirements of AASHTO Specification -Section 7, will be supplied.

Anchorage:
Steel anchor bolts are manufactured to AASHTO specification M314-90, Grade 55 (55,000 psi minimum yield strength), meeting the requirements of ASTM A576. Galvanizing to be per AASHTO M234 Class C (ASTM A153).

Appurtenances:

Pole caps: Shall be made from 356F cast aluminum or 6061 alloy and fastened to the pole top with stainless steel set screws.
Tenons: Shall be 356T6 cast aluminum or 6063T6 or 6061T6, and welded to the pole top. Floodlight brackets: Shall be made from 6061T6 or 6063T6 aluminum and be joined by welding. Stainless steel bolts are provided for field assembly. Brackets have a satin etched aluminum finish.
Tapered Elliptical and Truss Style Arms: Arm members shall be tapered and formed from 6063 aluminum tubing or pipe. Following assembly welding of the components, the mounting plates (or clamps), the entire assembly shall be heat treated to T6 condition. Arms have a satin-etched aluminum finish.

Welding:
All welding shall be performed by certified welders using the inert gas-shielded arc method with a consumable electrode. Welding must comply with the American Welding Society Specification 01.2, Structural Welding Code -Aluminum. All parts shall be cleaned prior to welding by chemical or mechanical means.


Vibration:
Occasionally, because of a phenomenon caused by local peculiarities of the site and or prevailing winds, poles may be susceptible to wind induced harmonic vibrations in the 10 to 20 mph wind range. Vibrations dampers which alleviate this condition must be available from the manufacturer, either factory installed inside the pole, or for field installation on the exterior of the pole. All round, square and cruciform poles having a post-top or side-of-pole mounted luminaire, which are 25' or greater are supplied with a factory installed damper. Poles with 4' single member arms (35' and greater) and 6' single member arms (40' or greater) shall be supplied with factory installed dampers.

Poles installed on bridges and structures may be subjected to traffic-induced vibration. This can have an adverse effect on the luminaire and the lamp filament, as well as the pole assembly. In these applications, vibration pads and washers for mounting the pole are advisable in addition to the vibration damper.

Finishing:
Round poles shall receive a satin rotary brush finish. Square poles, cruciform poles, arms and brackets shall receive a chemical satin etch finish. Alternate finishes can include clear and bronze-tone anodic paint and powder coatings. A variety of colors can be utilized.
Grounding:
Poles must be grounded in accordance with the requirements of the National Electrical Code and applicable local codes. All Poles and T-8ases shall be provided with provisions for grounding.

Foundations:
Since local soil and frost conditions vary widely, a civil engineer familiar with these conditions shall be consulted regarding the size and design of the foundation system.
 

Packaging:
All poles shall be spirally wrapped with protective krinkle kraft paper. If outdoor storage or storage in moist areas is anticipated, the wrapping should be removed to prevent water-marking and staining. The poles shall not be allowed to rest directly on the ground. Do not cover the poles with a tarpaulin or similar cover. Additional packaging may be provided depending on the shipping method. Small parts shall be packaged in boxes.


Individual Specifications:

RTA Round tapered aluminum poles with single member bracket arms.

-The shaft shall be tapered from 6063 extruded aluminum alloy tube per ASTM 8221,8241 or 8429. It shall be joined to a base by two (2) circumferential welds at the top and bottom of the base. The base shall be made of 356- T6 cast aluminum alloy per ASTM 826 or 8108, and the assembly shall be heat treated after welding.

-A handhole shall be provided on all poles unless mounted on a T-8ase. The hand hole shall have a reinforcing frame and a flush type door assembly. The hand hole shall be located between 12" and 18" above the base and at 90 degrees to the plane of the luminaire.

-The arm member shall be tapered and ellipsized from 6063 aluminum alloy extruded tubing. The arm shall be welded to a 6061 aluminum alloy pole plate or clamp for mounting to the pole. The arm assembly shall be heat treated after welding to T-6 temper. The end of the arm shall be of 2" pipe size (2 3/8" O.D.) slipfitter, 8" minimum length.

-A neoprene grommet shall be provided in the shaft wire entrance hole at the arm mounting location.

-All pole hardware (with the exception of anchor bolts) shall be 300 series stainless steel.


RTA Round tapered aluminum poles with truss bracket arms:
- The shaft shall be tapered from 6063 extruded aluminum alloy tube per ASTM 8221,8241, or 8429. It ! shall be joined to a base by two (2) circumferential welds at the top and bottom of the base. The base shall be made for 356- T6 cast aluminum alloy per ASTM 826 or 8108.
-A hand hole shall be provided on all poles unless mounted on a T-8ase. The handhole shall have a rein- forcing frame and have a flush type door assembly. The handhole shall be located between 12" and 18" above the base and at 90 degrees to the plane of the luminaire. .The arm members shall be tapered and ellipsized from 6063 aluminum alloy extruded tubing.
-The arm members shall be welded to 6061 aluminum alloy pole plates or clamps for mounting to the pole. The arm assembly shall be heat treated to T-6 temper after welding The end of the arm shall be of 2" pipe size (2 3/8" O.D.) slipfitter, 8" minimum length.
- A neoprene grommet shall be provided in the shaft wire entrance hole at the arm mounting location.
-All pole hardware ( with the exception of anchor bolts) shall be 300 series stainless steel.

RTA Round tapered aluminum poles with davit arms:
-The shaft shall be tapered from 6063 extruded aluminum alloy tube per ASTM 8221 OR 8429. It shall be joined to a base by two (2) circumferential welds at the top and bottom of the base. The base shall be made for 356- T6 cast aluminum alloy per ASTM 826 or 8108, and the assembly shall be heat treated after welding.
- A handhole shall be provided on all poles unless mounted on a T-Base. The handhole shall have reinforcing frame and have a flush type door assembly. The handhole shall be located between 12" and 18" above the base and at 90 degrees to the plane of davit arm and luminaire.
-The arm member shall be tapered and formed to a radius from 6063 aluminum alloy extruded tubing.
-The arm assembly shall be heat treated to T-6 temper and have a satin-brush aluminum finish. The end of the arm shall be of 2" pipe size (2 3/8" O.D.) slipfitter, 8" minimum length.
-The arm and pole connection shall be designed such that the arm will telescope the shaft for easy field assembly. The joint shall be secured with 2 through bolt assemblies.
-All pole hardware (with the exception of anchor bolts) shall be 300 series stainless steel.

RFA Round fluted poles:
-Fluted poles shall consist of a cast aluminum base assembly, an extruded 6063- T6 aluminum alloy fluted shaft and cast aluminum ornamental tenon to accept a post-top luminaire.

SSA Square poles:
-Square poles shall be provided with a 356- T6 alloy base and an 6005- T5 or 6063- T6 extruded shaft. The base and the shaft shall be joined by two (2) welds at the top and bottom of the base. The assembly shall be heat treated after welding. A reinforced handhole frame and door assembly shall be provided 12" from the base. The corners of the shaft shall have a radius of. 75" I.D.

CFA Cruciform poles:
-Cruciform poles shall be provided with a 356- T6 alloy base and an 6005- T5 or 6063- T6 extruded shaft. The base and the shaft shall be joined by two (2) welds at the top and bottom of the base. The assembly shall be heat treated after welding. A reinforced handhole frame and door assembly shall be provided 12" from the base.

Embedded Direct burial poles:
-The embedded portion of the pole shall have protective coating to further protect the corrosion -resistant aluminum.
-To prevent rotation and settling, the pole shall be flattened at the bottom.
-A wire entrance shall be provided 18" below grade with a factory installed 1 1/4"I.D. grommet.
-A reinforced cast aluminum hand hole shall be provided 12" to 18" above grade.