Rev_Sample_Task_Order.docx

Statement of Work Sample Task Order Attachment 4

· Antenna Model Number (Qty): (1) SRL-229 Whip Antenna

· RADOME: NO

· Elevation C.O.R: 70’ At Base

· TX. Line Size and Type: (1) LDF4-50A

· Frequency: N/A

· Azimuth To North: Unknown

· Antenna Mount: One (1) 3’ Sidearm

· Mount Provided: YES

· Antenna Model Number (Qty): (2) 4’ x 1’ Yagi Antenna Kathrein Scala CA7-410

· RADOME: NO

· Elevation C.O.R: 70’ At Base

· TX. Line Size and Type: (1) LDF4-50A

· Frequency: N/A

· Azimuth To North: Unknown

· Antenna Mount: One (1) flush Mount 2-3/8” O.D. Pipe

· Mount Provided: YES

6.0 GROUNDING:

6.1 The Forest Service uses the Motorola R56 Standards and Guidelines for Communications Sites, and National Electrical Code (NFPA 70) and National Fire Protection Association (NFPA 780). It is recommended that all personnel responsible for the installation, testing, and maintenance of Forest Service grounding and lightning protection systems reference the Motorola R56, NEC, and NFPA 780 standards for more detail on the subjects contained in this document.

6.2 Fall of Protection Method: The contractor shall perform ground resistivity testing using the Fall of potential (also known as the 3 point fall method) is the most recognized method for measuring the resistance to earth of a gounding system, or ground system performance.

6.2.1 Grounding Performance Objectives

Conductivity-to-ground is the primary goal for an effective grounding system. The acceptable range shall be within Five (5) ohms to twenty five (25) ohms of resistivity. If initial resistivity test exceed twenty five (25) ohm, no work shall continue until Forest Service reviews and agrees to grounding options. Post installation, contractor shall perform a system test for compliance and report the results.

7.0 TOWER:

All specifications shall meet as a minimum, ANSI TIA/EIA 222 Rev G. “Structural Standards for Steel Towers and Antenna Supporting Structures” based on:

Height of Tower: 80 Feet Wind and Ice Load Calculations: Based on ANSI EIA/TIA 222G Annex B: “U.S. County Listings of Design Criteria” Equipment Load Calculations: Based on equipment order per Task Order.

Class of Structure: Based on ANSI EIA/TIA 222G

8.0 TOWER SPECIFICATIONS

· Tower shall have Solid Core or Angle Iron legs and are to be dipped galvanized, Tubular Hollow Core legs are not acceptable.

· Tower obstruction lighting requirements shall meet:

· FAA Regulations “FAA AC-70-7460-1, “Obstruction Marking and Lighting”.

· Local Forest Service Unit Regulations (Provided for each Tower by Local Unit).

· Installation of industry approved anti fall / safe climb device OSHA 1910.27, “Fixed Ladders, Ladder Safety Devices”.

· Tower designed shall support wind loading of all antennas, mounts, and coaxial cable listed.

· Include 3 sets of P.E. Stamped document stamped with the seal of the state the tower is being built.

· Antenna and coaxial cable installation shall be connected to the single point ground system shall be supplied with the tower, all materials shall be installed in accordance with and in compliance with Motorola’s R56 Standards for Installation of Communications Equipment.

· Waveguide Ladder: Shall support a minimum of two (2) runs of coaxial cable over the current antenna system. The Waveguide Ladder shall have ¾” holes shall accommodate coax hangers. Vertical Spacing between waveguide ladder rungs shall not exceed three (3) feet. All waveguide / Cable shall be secured to waveguide ladder.

· Climbing Ladder: Shall be provided that extends from the base to the top and situated for convenient climbing of tower. Climbing ladder shall provide anti-climb protection to discourage un-authorized climbers.

· Safety Climb Cable: Shall be provided that extends from the base to the top and situated for convenient climbing of tower. The fall stop assembly shall be removable to prevent weathering and corrosion.

· Ice Bridge: Shall be installed from the tower to the building entrance panel. Ice Bridge shall provide protection to the cables from falling ice and provide a means to support the cables from the tower to the building. Ice Bridge shall be self-supporting, galvanized, connected to the tower or building and include a perforated or solid cover. Coaxial cables shall be supported via trapeze kits and appropriate hangers.

· Entry panels: Minimum of 2 entry ports shall be installed at building entrance and shall include all necessary weather proof boots and cushions to accommodate the required number of antenna cables. All unused holes shall be sealed with appropriate product plugs (silicone or foam is not acceptable).

· Ground Dispersion System: Contractor shall design and install a ground field and ground system around the base of the tower. The resistance shall be twenty five (25) ohms or less. Contractor shall demonstrate and provide certification of measurement using the Standard Three Point/Fall of Potential method. A P.E. Stamped design layout shall be provided of the proposed grounding system prior implementation (this shall require documentation by an Electrical Engineer). All ground field connections to the tower shall be exothermic welds using #2 solid copper cable or larger. The Contractor shall connect to all metal structures within 15’ of the nearest approach of the ground field conductors. This includes, but not limited to, buildings, site fencing, propane tanks, generator, Ice Bridge, exterior ground bar, etc. These connections shall be via exothermic weld when possible or non-reversible ground lug connection otherwise. If ground lugs are used, they shall be of the appropriate finish to prevent corrosion due to galvanic action. Contractor shall provide three (3) sets of Electrical Engineer sealed documents licensed in the State the tower is being built.

· Copper Ground Bar: A copper ground bar, 4” x 24” x ¼” shall be installed beneath the buildings entry panel(s). External ground bar shall be connected to the grounding conductors of the ground field using #2 solid copper cable or larger. The below grade grounding connections shall utilize the appropriate antioxidant compound, and be weather sealed. Each coaxial cable shall be grounded, using the appropriate sized ground strap, to the tower at the antenna, to the tower ground bar at the tower base and to the external ground bus bar at the building entrance. The tower ground bar shall be tinned copper. Attachment of the tower ground bar to the below grade ground may be with tinned non- reversible compression lugs and tinned #2 solid copper cable. Ground attachment points on the tower may make use of existing bolts, or may use beam clamps of galvanized or stainless steel construction. Antennas and cabling to include antenna mounts, cable hoisting straps, cable attachment clips, grounding kits, external and tower ground bars as necessary to meet Motorola R56 Installation of Communications Equipment requirements. An internal Master Ground Bus will be installed in a location near the building entry port according to R56 Standards.

· Cable Runs: Andrew LDF 4 50A 1/2” cable (or equal) shall be used for all runs. Contractor must supply documentation of cable specifications. All cables shall be secured to tower using appropriate hangers. Cables shall be installed on the cable ladder in an orderly fashion, with the highest antenna lines to be toward the center of the ladder. All cables shall be grounded at the antenna, at the bottom of the tower and at the building entrance as stated above. Coaxial cables shall be labeled at the point where they leave the tower and at the inside termination. This labeling shall include the antenna make and model, frequency range, and location on the tower. The interior labeling may be label printer tape, and the outside labeling shall be stamped metal, laminated cardstock, or similar weatherproof method. All cables shall be terminated with N Male connectors (or as needed for direct attachment to antenna and Polyphaser protector). Cable shield ground attachment points and antenna connections shall be weatherproofed to industry standards, using mastic and tape or cold shrink protection, if mastic is used; a courtesy wrap (Single wrap of electrical covering both end of the connector) tape shall be installed on antenna connections. Coaxial cables shall be secured to the standoff using an appropriate hanger (zip ties of metal banding will not be acceptable.)

Coaxial line lightning/surge protection device, similar to Polyphaser IS-5ONX-C2-MA will be installed near to the internal Master Ground Bus and grounded to the Master Ground Bus (per R56 standard section 5.5.1.8).

· Antennas: All antennas except dish and yagi shall include an 18” to 36” standoff mount that attaches to single leg. Standoff mounts are to be adjustable for leg tilt if present, so that antennas are installed vertically. All side-mounted antennas shall be secured to the tower at the top and bottom of the antenna mast or as otherwise directed by local telecom personnel. If specific antennas are stated it task order, no antenna substitutions are allowed without acceptance of the Forest Service. All antennas shall be identified and a list of the locations on the tower shall be provided upon completion.

· Access to Site: Public roads to site shall be accessible with travel available late spring through late fall. At the site, it shall be the contractor’s responsibility to provide access to the construction site for their heavy equipment. If no access road is provided, it is the responsibility of the contractor’s to return any and all areas to access to their original conditions. It shall be the contractor’s responsibility to repair any damage to access road by project equipment and return it to its’ previous condition.

9.0 DEMOLITION:

· The removal of existing towers or Telecommunications structure will be done in a way that no damage will occur to remaining structures/equipment

· Any damage caused by the removal of the structure will be the responsibility of the contractor to repair

· All concrete foundations and/or anchors will be removed to 18” below grade

· Disposal of all demolition debris shall be discarded in accordance with state, federal environmental regulations as applicable.

DELIVERIES OR PERFORMANCE

A. FEDERAL ACQUISITION REGULATION CONTRACT CLAUSES IN FULL TEXT

FAR 52.211-10 Commencement, Prosecution, and Completion of Work (APR 1984) The Contractor shall be required to (a) commence work under this contract within 5 calendar days after the date the Contractor receives the notice to proceed, (b) prosecute the work diligently, and (c) complete the entire work ready for use not later than 365 calendar days. The time stated for completion shall include final cleanup of the premises.

ATTACHMENTS