7081-3 Scope of Work - Traffic Signal PolesSCOPE OF WORK
The scope of work shall be finalized upon the selection of the Firm. The respondent’s submission shall have accurately described your understanding of the objectives and scope of the
requested products and services and provided an outline of your process to implement the requirements of the Scope of Work and Services.
A manufacturer’s and/or supplier’s proposed submittal(s) to the City, as a result of a request by the City, for the manufacture and/or supplying of a traffic control signal pole system
and traffic poles and/or any component thereof shall provide to the City, at a minimum:
A cost of each traffic pole system and/or component(s) as requested by the City. Said cost shall include but not be limited to all appurtenance(s) and/or ancillary item(s) necessary
for the proper installation and function of said system(s) and/or component(s).
Sealed engineering “shop” drawings of each said system(s) and/or component(s) and its’ appurtenance(s) and/or ancillary item(s) necessary for the proper installation and function of
said system(s) and/or component(s) in accordance with the provision(s)/requirement(s) as provided herein and/or the City’s applicable TS series schematic(s).
Sealed engineering structural calculation(s) for each said system(s) and/or component(s) and its’ appurtenance(s) and/or ancillary item(s) necessary for the proper installation and function
of said system(s) and/or component(s) in accordance with the provision(s)/requirement(s) as provided herein and/or the City’s applicable TS series schematic(s). At a minimum, maximum
loads and stresses shall be determined for the most critical wind direction. The pole shall be analyzed in accordance with AASHTO 2013/2015 Chapter 11 fatigue design. AASHTO fatigue
category 1 and truck induced wind gusts shall be used to analyze the pole. Shaft dimensions shall be equivalent in strength for the loads shown on the City of Denton’s schematics and/or
standard details.
A written listing shall be provided to the City of each page of the City’s TS series schematic(s) page(s), applicable to said system(s) and/or component(s) requested by the City, with
an indication of acceptance thereof or exception(s) to each. If an exception is taken to any item, then each item(s) on each page of said schematic, for which an exception is being
taken, shall be so noted/listed and shall include, but not be limited to: a detailed explanation (in wording understandable to an average person with little or no traffic signal pole
background) for each exception which, shall be provided to and for the City’s review and acceptance.
For any exception taken not related to a provision(s)/requirement(s) as provided herein and/or an applicable City TS series schematic(s) for the applicable said system(s) and/or components(s)
requested by the City, as may be implied and/or referenced thereof by said City document(s), a written listing shall be provided to the City of said exception(s) including, but not
limited to: a detailing of the source(s)/ reference(s) information and; a detailed explanation (in wording understandable to an average person with little or no traffic signal pole
background) for each exception which, shall be provided to and for the City’s review and acceptance.
TECHNICAL SPECIFICATIONS
AASHTO
Signals Unless specifically indicated as being otherwise, all references to AASHTO shall be for 2013/2015 AASHTO, Standard Specifications for Structural Supports for Highway Signs, Luminaires,
and Traffic
TxDOT POLE SPECIFICATIONS: RFP line items 1-10
All specifications for TxDOT signal pole(s), their mast-arm(s), luminaire arm(s) and/or ILSN arm(s), and their related hardware shall conform to the specific requirements as noted immediately
below unless in direct conflict with TxDOT 1996/1999/2012 or most current, as applicable, specifications in which case said TxDOT specifications shall control. Specific requirements
are as follows:
Vertical pole(s) and mast-arm(s) shall be round or near round.
Mast-arms shall be rigid mounted to the vertical pole and not have tenons or couplings.
Luminaire-arms shall be a nominal 8 feet long and clamp type with simplex fittings.
ILSN arms shall be a nominal 9 feet long and clamp type.
All vertical poles shall be built to support all associated static and moment loads for the maximum mast-arm length allowed for each TxDOT foundation type specified.
All mast-arm butt plates, mast-arm vertical pole butt plates, associated bolt types and bolt patterns shall be the same as per the requirements of Exhibit 1, Item #5: MAST ARM 30', RIGID
MOUNTED, FOR REPLACEMENT MAST ARM VERTICAL POLE, COMBINATION 30' POLE, 17" BOLT CIRCLE, FOR A 30-A FOOTING, 80MPH
The center hole for both the butt plates as well as the vertical pole’s said butt plate’s connection are to be aligned and the maximum diameter allowed.
All poles shall be rated as being designed for either TxDOT’s 80MPH wind load requirements as requested in the City’s “RFP Proposal Form”.
TxDOT ROADWAY ILLUMINATION POLE AND LUMINAIRE ARM ASSEMBLIES: RFP line items 28-29
All specifications in the current TxDOT Highway Illumination Manual referencing Item 610 must be met (http://onlinemanuals.txdot.gov/txdotmanuals/hwi/hwi.pdf.). Must meet TxDot Standards,
RIP (1)-17 (Appendix C).
Proposed manufacturer(s) must be approved by TxDot to produce roadway illumination poles, including luminaire arms. See Appendix D.
CITY POLE SPECIFICATIONS:
General:
A Traffic Signal Pole System shall consist of tapered vertical poles, tapered traffic signal mast-arm(s) (if required), luminaire arm(s) (if required), illuminated street name sign arm(s)
(if required), base plate, base plate/anchor bolt cover(s), anchor bolts with 2-nuts per anchor bolt, butt plate(s), flange, hand-holes, caps, as well as all the applicable appurtenances
and ancillary items noted per the attached City of Denton’s TS series schematics and standard detail sheets as they relate to the traffic pole system. Where the City of Denton’s specifications
and/or standard details are void, manufacturing shall meet all the design requirements of AASHTO and/or the Texas Department of Transportation (TxDOT) “Traffic signal support structures”,
as may apply. Where conflicts exist between the following specifications, the design requirements of AASHTO standard specifications for structural supports and/or the Texas Department
of Transportation (TxDOT) “Traffic signal support structures”, and/or the attached City of Denton’s schematics and/or standard details, the manufacturer shall contact the City of Denton
Traffic Engineer for clarification prior to continuing.
The pole manufacturer shall be AISC certified to manufacture the poles and provide acceptable evidence, upon request, to that effect to the City upon submittal of any drawings and/or
calculations to the City for review and approval. All drawings and calculations submitted to the City for review and approval shall be stamped by a Professional Engineer registered
in the state of Texas.
Tapered Vertical Pole
The mast-arm/luminaire vertical pole shall:
Be fabricated from coil or plate conforming to ASTM A595 Grade A with a minimum yield strength of 55 ksi or ASTM A572 with a minimum yield strength of 55 ksi;
Be round/near-round in cross-section and have a constant linear taper of 0.14 in/ft.;
Contain no circumferential welded butt splices;
Have no more than two longitudinal welds permitted in the fabrication;
Be manufactured in accordance with the City of Denton’s schematics (TS series) and shipped in one piece;
Have a minimum diameter hole (behind the mast-arm vertical pole butt plate) equal to or greater than the mast-arm vertical pole butt plate’s wiring hole and centered on said wiring hole.
The minimum wall thickness shall be seven (7) gauge;
At the mast-arm connection, the diameter/thickness ratio (D/t) shall not exceed 52 for A595 Grade A tubes or 66 for A572 tubes;
Have reinforced hand-holes, in size and location per the City of Denton’s standard detail sheet. All hand-holes shall be supplied with a cover and vandal resistant attachment hardware;
Be provided with a zinc die cast end cap secured in place with a minimum of three (3) stainless steel setscrews. The end cap’s inside/outside (as applies) diameter shall be sufficiently
close to the applicable inside/outside (as applies) diameter of the pole it is to attach to (so as to be easily installed and removed), but the applicable diameters shall not exceed
greater than ¼ inch difference;
Shall be powder coated as directed by the City of Denton.