1.9.14_Tower_Scope.pdf

Statement of Work

Installation of new 180’ Self-Supporting Radio Communications Tower for

US Fish & Wildlife Service Aransas National Wildlife Refuge Complex

PO Box 100 Austwell, TX 77950

Site Contact:

Joe Saenz Cell: 361-349-1139 joe_saenz@fws.gov

Engineering Contact:

Brian Rago

Radio Systems Engineer Contractor

PH: 303-236-5077

brian_rago@fws.gov

May 23, 2019

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This Statement of Work (SOW) document describes the desired installation services, materials, and tasks for this project.

LOCATION:

This project is located in Texas within the Aransas National Wildlife Refuge Complex of the U.S. Fish and Wildlife Service (USFWS). The Aransas National Wildlife Refuge campus re-development plan will include a new maintenance complex area. The location of the new tower shall be next to the proposed Maintenance Building within the new maintenance complex area. The new maintenance complex area is located approximately 36 miles south of the city of Victoria, TX. Below are the approximate coordinates for the site associated with this project:

New Maintenance Complex area – accessible with 2-wheel drive vehicle N 28º-18’-35.95” W 96º-48’-28.55”

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OVERVIEW

The following is an overview of this project. Details relating to each part are described in the “Project Details” section of this document:

At the new Maintenance Complex area:

180’ Self-Supporting Radio Communications Tower Contractor shall design, furnish, and install one new 180’ self-supporting tower per the customer’s requirements.

Contractor shall perform a geotechnical investigation study of the proposed tower location and issue a report prior to the design of the tower foundation.

Construction of the new tower shall include all design and engineering of the tower and foundation, materials, fabrication, transportation costs, and installation (labor and mobilization of crew).

The tower and foundation design shall be designed and stamped by a professional engineer licensed in the state of Texas.

Site Grounding

All site components (exterior and interior) shall be properly bonded to a common grounding grid in accordance with Motorola R56 guidelines.

Waveguide Bridge Kit

Contractor shall furnish and install the necessary number of waveguide bridge kits required to support and protect the transmission lines routed from the tower’s vertical waveguide ladder to the cable entrance panel located on the side of the new maintenance building.

Radio Antenna System Installation

Contractor shall install one new government furnished antenna (VHF vertical) on the new tower per the customer’s requirements.

Contractor shall furnish and install one run of new transmission line, associated attachment hardware, and grounding components on the new tower per the customer’s requirements.

Radio Infrastructure Equipment Installation

Contractor shall install and verify the operation of one new pre-configured government furnished conventional P25 digital repeater.

Contractor shall install and verify the operation of one new pre-tuned government furnished duplexer (VHF).

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PROJECT DETAILS

General:

All work shall comply with the following standards:

MOTOROLA R56, STANDARDS AND GUIDELINES FOR

COMMUNICATION SITES, 2017

TIA-222-H STRUCTURAL STANDARD FOR ANTENNA SUPPORTING

STRUCTURES, ANTENNAS AND SMALL WIND TURBINE SUPPORT

STRUCTURES, 2017, including all addenda latest editions, by the Telecommunications Industry Association

INTERNATIONAL BUILDING CODE (IBC) 2018, by the International Code Council

ACI 301-10 SPECIFICATIONS FOR STRUCTURAL CONCRETE, by the American Concrete Institute

Tower, Self-Supporting Contractor shall furnish and install one new tower per the following requirements:

Type - The tower shall be a 180’ tall self-supporting type. This means no guy wires or other supports shall be used other than the legs themselves which shall be fastened to the tower foundation.

o The tower design shall be a three-legged triangular shaped tower.

Foundation – Contractor shall perform, at his expense, subsurface exploration, investigation, testing, and analysis as his Designer of Record deems necessary for the design and construction of the foundation system.

o Contractor shall issue a written report based upon field and laboratory testing accomplished by the Contractor’s Geotechnical Engineer prior to the design of the tower foundation.

o The Geotechnical Report shall include all the requirements listed in Annex G of TIA-222-H and Motorola R56.

Design – The tower shall conform to seismic/wind/ice loading requirements as per TIA-222-H Standard for the site location (Aransas County, TX) o The tower will be used for public safety communications, so it shall meet the Risk Category for critical communications (Risk Category: III).

o The Environmental Loads, Exposure Category, and Topographic Category for the tower shall be determined by the Contractor’s tower design engineer based on the tower’s location and surrounding terrain.

o The structural steel used for the tower must conform to one of the prequalified steel standards listed in TIA-222-H. All welding must be

- 5 -done by certified welders in accordance with AWS D1.1-10 Structural Welding Code-Steel. The entire tower and all components, including hardware, must be hot-dipped galvanized in accordance with the latest ASTM and TIA-222-H specifications.

o The tower shall be designed and built with one climbing facility in accordance with TIA-222-H.

o The tower shall be equipped with a vertical waveguide ladder on the face that is closest to the building that will house the radio equipment. The waveguide ladder must have the capacity to accept a minimum of nine (9) runs of transmission line held in place with industry standard ¾” dia. hole stainless steel snap-in coax hangers.

o The tower shall be grounded per Motorola R56, but not less than the requirements in TIA-222-H. The installation of a tower ground ring in accordance with Motorola R56 shall be required. The tower’s ground ring shall be bonded to the building’s electrical ground system per Motorola R56. All materials and connections used for the ground system must be in accordance with Motorola R56.

o To allow for the use of non-taper adjustable side mounts, the tower shall be designed with its vertical leg members parallel to each other from the 140’ level to the top of the tower (180’).

Loading – The tower shall be designed for the following antennas and tower mounted equipment:

Ant

Antenna Type (model)

Level base

Level center line

Level tip

Associated Cable

Mount Type

Installation

Exposed dipole vertical, VHF

(DB224-C)

155’ 166’ 177’ 7/8” Heliax side-mount (tip & base) part of this project

2 Yagi, 7-elements, UHF (430-

70*1) n/a 177’ n/a 7/8” Heliax clamp set (directly to tower’s vertical leg) future

3 Exposed dipole vertical, VHF (DB224 type)

140’ 151’ 162’ 7/8” Heliax side-mount (tip & base) future

4 Exposed dipole vertical, VHF (DB224 type)

140’ 151’ 162’ 7/8” Heliax side-mount (tip & base) future

5 Fiberglass collinear, VHF

(ANT150F2)

134’ 137’ 140’ 7/8” Heliax side-mount with taper adjustment (base only) future

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6 4’ dia. High Performance Dish (Radio Waves

HP4-4.7)

n/a 120’ n/a LMR-600 jumper dish mount with taper adjustment future

7 Tower Mounted Microwave Radio n/a 115’ n/a (2) runs of outdoor rated

CAT6

n/a future

8 4’ dia. High Performance Dish (Radio Waves

HP4-4.7)

n/a 110’ n/a LMR-600 jumper dish mount with taper adjustment future

9 Tower Mounted Microwave Radio n/a 105’ n/a (2) runs of outdoor rated

CAT6

n/a future

Lighting – The Contractor shall investigate and determine if the tower requires lighting in accordance with the Federal Aviation Authority (FAA) and/or local aviation authority requirements. If it is determined the tower requires lighting, the Contractor shall furnish and install the required type of lighting on the tower. The Contractor shall submit a written document to the customer stating the FAA’s lightning determination.

Air Terminal – The tower shall be equipped with a top mounted lightning protection air terminal.

o The tower top mounted air terminal shall be kept to a length so not to make the tower’s overall height greater than 200’.

Site Layout Drawing – The Contractor shall create and submit a drawing(s) showing the proposed site layout to the customer for their review and approval.

o No work shall occur at the site prior to receiving the customer’s approval of the proposed layout.

o The drawing shall show the proposed placement of the new site components (tower and waveguide bridge) in relation to each other and the new maintenance building.

o The drawing shall show distance measurements and the proposed paths of any interconnecting electrical utilities. This is to include both overhead and buried interconnections.

Site Grounding The entire communications site and all the assets (exterior and interior) installed within the site compound perimeter shall be grounded using materials and methods in

- 7 -accordance with Motorola R56, Standards and Guidelines for Communication Sites, 2017.

Waveguide Bridge The Contractor shall furnish and install the necessary number of waveguide bridge kits required to support and protect the transmission lines routed from the tower’s vertical waveguide ladder to the cable entrance panel located on the side of the new maintenance building.

Type - The self-supporting safety grated waveguide bridge kit shall be 12” wide, with two direct burial posts and three triple tee trapezes (CommScope model WB- K110-B or approved equal).

o Hot-dipped galvanized steel o Trapeze shall accept ¾” stainless steel snap-in coax hangers o Trapeze shall support a minimum of 12 cable runs o Caps for the posts

Installation – o The Contractor shall install each waveguide bridge support post in a concrete caisson. The minimum diameter of the concrete caisson shall equal the pipe diameter plus 6”.

o The waveguide bridge shall be completely self-supporting and not mechanically fastened to the tower or building.

o There shall be a separation of 6” between the tower and bridge and 6” between bridge and building.

o If multiple bridge kits are required to provide the necessary length to support the cable runs from the tower to the building, the bridge kits shall be installed end-to-end and fastened together using splice plates (CommScope model WS-K400 or approved equal).

o The waveguide bridge kit(s) shall be bonded to the site grounding electrode system in accordance with Motorola R56.

Radio Infrastructure Equipment Installation Contractor shall install the infrastructure equipment and materials per the following requirements:

Note: The Contractor shall furnish all materials that are not specifically designated as government furnish.

Antenna Installation – The Contractor shall install one new government furnished antenna on the new tower.

- 8 -o The antenna type and associated mounting levels are listed in the table under the “Loading” sub-section of the “Tower, Self-Supporting” project details section (see above). In the table, antenna #1 shall be installed as part of this project.

o For antenna #1 (CommScope DB224-C, VHF exposed dipole vertical), the Contractor shall install this new antenna using the government furnished side-mount hardware kit (CommScope DB5001). All components of the kit shall be installed so the antenna is supported at the base and tip. The elements of the antenna shall be positioned for an omni pattern.

Transmission Line Installation – The Contractor shall furnish and install one (1) run of new 7/8” Heliax type coax cable (CommScope AVA5-50 / AVA5-50FX or approved equal) from the antenna, down the tower, and into the building.

o The cable shall be fastened to the tower’s vertical waveguide ladder and waveguide bridge using Contractor furnished new stainless steel snap-in hangers. The Contractor shall furnish and install the appropriate new coax connector (CommScope A5NF-S / A5NM-S or approved equal) on the antenna end of the cable run. The Contractor shall furnish and install a new 6-port aluminum cable entry panel with 4” diameter ports (SitePro1 part # E1449 or approved equal) in the exterior wall of the new maintenance building per Motorola R56. The cable shall be routed into the building via the cable entrance panel. The panel shall be equipped with an appropriate sized boot/cushion assembly kit for the cable and all unused ports protected with blank (no hole) boot assembly kits. Install one cable per entry panel port. The cable run shall be terminated inside the building with a Contractor furnished and installed N/Male connector (CommScope A5NM-S or approved equal).

o If the placement of the antenna’s connector does not allow for a direct connection to the 7/8” cable, the Contractor shall furnish and install an appropriate length jumper constructed of ½” Superflex Heliax type coax cable (CommScope FSJ4-50B or approved equal) and matching new connectors.

o All exterior transmission line connectors shall be weatherproofed with wrap/tape.

o A minimum of three grounding kits shall be Contractor furnished and installed on the coax run. One near the base of the antenna, one at the vertical to horizontal transition, and one near the exterior side of the building’s entrance panel per Motorola R56.

o The Contractor shall furnish and install two wall-mount type ground bars (2” x 10” x 1/4”, Tessco sku # 442460 or approved equal) per Motorola R56. Both bars shall be mounted on the wall below the cable entrance panel. One shall be mounted on the exterior side of the wall and the other on the interior side of the wall. The two ground bars shall be connected together using a method in accordance with Motorola R56.

o All Contractor furnished hardware used to fasten ground conductor lugs to ground bars shall be made of stainless steel.

- 9 -o A bulkhead type coaxial protector (PolyPhaser model IS-B50LN-C2 or approved equal) shall be Contractor furnished and installed inline on the coax run near the interior side of the building’s entrance panel. The coaxial protector shall be properly connected to the interior ground bar per Motorola R56.

Radio Equipment Installation – The Contractor shall use qualified personnel to install the government furnished radio (repeater) in the new maintenance building.

o The government furnished Motorola GTR8000 radio will be pre-programmed and configured by the USFWS Radio Office prior to delivery.

o The GTR8000 will operate as a repeater in the VHF band (136 to174 MHz range).

o The new government furnished VHF duplexer (Telewave TPCD-1556) will be pre-tuned to the desired operating frequencies prior to its delivery.

o The new shop building shall be equipped with one (1) 19” open equipment rack (minimum 41 unit capacity). The Contractor shall furnish and install a new rack to fulfill the requirement. The one rack shall house the GTR8000 repeater and VHF duplexer.

o Using Contractor furnished mounting hardware that is compatible with the open rack’s pre-threaded mounting holes; install the VHF duplexer near the top of the rack. The VHF GTR8000 repeater shall be mounted in the rack below the duplexer. No equipment shall be installed within 16” of the floor.

o For the VHF repeater, the Contractor shall furnish and install the appropriate length jumper constructed of ½” Superflex Heliax type coax cable (CommScope FSJ4-50B or approved equal) and matching new connectors for the duplexer-to-coaxial protector interconnection.

o For the VHF duplexer, the Contractor shall furnish and install the appropriate length jumpers constructed of 1/4” Superflex Heliax type coax cable (CommScope FSJ1-50A or approved equal) and matching new connectors for the duplexer-to-repeater TX/RX interconnections.

o The Contractor shall furnish and install the appropriate ground conductors and grounding hardware to ground the equipment rack and radio to the building’s interior ground bar in accordance with Motorola R56.

o The Contactor shall furnish and install a rack-mountable Type 3 SPD with a minimum of 8 outlets for the equipment rack in accordance with Motorola R56.

Performance Testing - The Contractor shall possess the necessary RF test equipment to verify the proper operation of the radio system and provide a written document with the findings, measurements, and observations:

o Measured forward and reflected power of the radio into the antenna system.

o Measured transmit frequency error.

o [Pass/Fail] Verify good receiver sensitivity (VHF: better than -119 dBm).

- 10 -o [Pass/Fail] Verify there is no excessive insertion loss (greater than 2 dB) associated with the duplexer.

o [Pass/Fail] Verify there is no repeater receiver desense.

o [Pass/Fail] Verify that subscriber radios (programmed with frequencies for this site) are able to communicate with each other through the repeater.