GRD VOR Scope of Work 06-24-2021.pdf

SCOPE OF WORK

GRD VOR, ROOF REPLACEMENT

Greenwood, South Carolina 06/24/2021

1.0 BACKGROUND

The Greenwood VOR Facility is contained in a 36’x36’x12’high equipment building. It has a flat round roof 52’ in diameter. There is a 16’ tall, cone shaped antenna cover “teepee” that typically sits on the roof. There are 16, 4’ tall, detector antennas with “mailbox” sized covers arranged around perimeter of roof. It has an equipment room, storage room, EG room, and a lavatory.

The FAA wants to replace the building roof and improve the grounding system. Contractor shall provide FAA with a price proposal for all work described below.

1.1 SCOPE OF WORK

The Contractor shall perform the following instructions:

1. Provide asbestos testing services. Cut a 6”x6” sample through all layers of the roof down to the wood deck. Use tin snips to cut through the sheet metal layer. Patch resulting hole in roof with ½ gallon roof repair mastic. Submit samples to an asbestos/environmental testing laboratory licensed in the State of South Carolina. Provide test results to the FAA two weeks before demolition work begins.

2. Furnish and install a new PVC roof membrane on GRD VOR equipment building. Remove and discard old roof. Clean and prepare surfaces for new roof. All work to be done in accordance with the attached drawings & specifications.

a) This work requires an extended shutdown of VOR service. Provide one month advance notice to FAA. Verify NOTAM’s have been made. Obtain written permission from FAA to begin work.

b) Make arrangements with an FAA Technician to take the VOR out of service & de-energize antenna power. Un-fasten antenna cable located within teepee and remove electrical wiring harness from antenna motor. Wrap connectors in plastic bags w/electrical tape to prevent damage during construction.

c) Provide crane services to remove fiberglass antenna cover. Cover is cone shaped 16’ high with 10’ diameter base. Cover weighs approximately 500lbs. Remove TACAN antenna motor. Unbolt top cover & ring and remove from main teepee. Unfasten & pry off main teepee and remove from roof deck. Contractor to provide bolt on adapter between teepee and crane.

d) Unbolt and remove 16 mailbox antennas, brackets and, posts. Carefully collect all nuts, bolts, washers & plates and, store for re-use. Arrange with FAA Technician to disconnect coaxial cable from each antenna. Protect coax connectors with plastic bags and electrical tape. Tie wrap antenna cables out of the way.

e) Completely tear off all old roofing, metal terne plate, and vapor barrier in order to fully expose wood roof decking. Disconnect grounding down leads. Broom clean all debris from deck.

f) Tear off all old roofing from underneath teepee. De-solder terne plate from steel antenna pedestal mounting ring.

g) Repair and replace any damaged wood decking with new 2”x6”, type 2, pressure treated lumber.

Contractor will include 500 square feet of wood deck replacement in his base bid. Any damaged wood that exceeds 500 square feet shall be replaced by contract modification.

h) Repair and replace any damaged mailbox antenna support brackets. Replace any bad fasteners with new stainless steel nuts & bolts.

i) Provide a new stainless steel flattened expanded metal mesh and PVC membrane Roof System in accordance with drawing series GRD-1505934.

j) Install ¾” plywood, vapor barrier, and Stainless steel flattened expanded mesh in accordance with specifications.

k) Weld steel mesh to Stainless steel grounding segments and securely fasten to the antenna pedestal and, (4) 4” x 12” bent stainless steel plates on edge of roof and connect new 2/0 awg grounding down conductors.

l) Install a fully adhered, single ply, PVC roofing membrane in accordance with the contract specifications.

m) Provide new 3” wide, 24 gauge, folded, Sarnaclad metal edge trim around entire 164’ perimeter of roof.

n) Provide the services of a licensed surveyor. Set a transit on center of antenna platform. Follow instructions given in specifications to mark new locations for mailbox monitor antennas. Fabricate new brackets in accordance with drawings. Re-attach mailbox antenna brackets.

o) Pressure wash and paint mailbox covers. Paint mailbox covers with two part thermosetting epoxy paint color white.

p) Provide crane services. Install new GFM fiberglass teepee on top of roof. Position neoprene gasket under teepee. Place teepee on roof and bolt into final position. Completely seal off the construction joint at base of teepee with 3M 5200 caulking.

q) Re-attach the antenna motor, top cover & ring. Re-connect all antenna cables & power wiring harness.

r) Make arrangements with the FAA to re-energize VOR and place it back into service.

3. Contractor must take all steps necessary to protect FAA property and equipment from moisture damage during construction. Provide a waterproof tarpaulin capable of covering entire 40’x40’ roof per contract specifications Section 10B.

4. Provide the FAA with a 10 year warranty on Roof Manufacturer’s materials and, a one year warranty on Contractor’s labor. Contractor will repair any leaks or defects in roof at no cost to the FAA for a period of one year.

5. Furnish and install (4) new #2AWG THWN grounding downleads. Remove and discard the existing #2AWG downleads located at each corner of building. Provide new stainless steel grounding plates per contract drawings. Provide new compression fittings lugs for bolt connections to ground plates. Connect new #2AWG downleads to ground counterpoise. Provide exothermic welded connections to earth ground equal to CadWeld. Provide new PVC conduit & galvanized clamps on all (4) sides of building to protect downleads.

6. Restore/replace metal soffit as needed. Contractor to provide quote to include 164 LF of soffit.

7. Clean up site. Remove all construction materials. Broom clean building interior & roof top.

1.2 DRAWINGS

GRD-1505934-G001

GRD-1505934-G002

GRD-1505934-G003

GRD-1505934-D001

GRD-1505934-A001

GRD-1505934-A002

GRD-1505934-A003

GRD-1505934-A004

GRD-1505934-S001

GRD-1505934-S002

GRD-1505934-E001

1.3 SPECIFICATIONS

a) FAA-GRD-1505934 04/28/2020

b) FAA-STD-019E

c) FAA-C-1217F

d) FAA-C-1391C

e) NFPA 70

1.4 SUBMITTALS

All products & materials used shall meet FAA approval before work begins. Submittals will include the following:

a) Work Schedule

b) Safety and Accident Prevention Plan

c) Bonding and Insurance

d) Equipment, cranes, man lift, boom lift, or aerial work platform

e) Certification of Skills & Qualifications. Electrician’s License

Materials, Tools & Equipment contained in 1.1, 1 through 10 above

f) Roof vapor barrier, 3/4” plywood, & fasteners

g) PVC membrane roof system

h) ¾” Diamond x 9 GA Stainless Steel Expanded Metal Mesh

i) Metal drip edge, fascia trim &, fasteners.

j) Roof system warranty.

k) Electrical fittings, wire, conduit & exothermic welding materials

2.0 GENERAL REQUIREMENTS

a.) Contractor will give FAA twenty one day advance notice before construction begins.

b.) All work shall be coordinated, scheduled, & approved by FAA Air Traffic Management and Airway Facilty Management. NAS critical systems shall not be shut down and cut over until strategic shutdown committee approval is received.

c) Contractor will stage work in a manner that minimizes GRD VOR outage time.

d) Protection of work. Contractor shall not leave roof open to elements and will have enough tarp on hand to prevent water from entering building. Building roof will remain covered at all times.

e) All Electrical work shall be performed by a Licensed Electrician. FAA will accept license from States outside South Carolina.

f) Contractor shall repair any damage done by him to any entity, at his cost. Contractor shall be covered by minimum locally required liability.

g) Contractor must provide FAA with a safety and security plan before any work begins. Plan will include procedures for accident prevention, emergency procedures, phone number & map to nearest emergency medical facility.

h) Contractor's Superintendent shall be present at the work site during all times work is performed. Superintendent shall carry a cell phone and, be prepared to make and receive calls to & from the FAA at all times while on work site.

2.1 WORK HOURS AND CONDITIONS

a) VOR roof work must start and finish within 45 calendar days.

b) Contractor will obtain authorization to work from the FAA and be subject to continuous FAA escort.

c) Contractor will report & coordinate each days work in advance with an FAA technician that is trained to operate and repair VOR equipment.

d) Work will be done during daylight hours between 7:00AM to 4:00PM. Mon thru Fri.

e) Saturday & Sunday work will only be allowed to expedite roof repair in case of rainy weather.

3.0 PRE – BID SITE VISIT

The Contractor is expected to carefully examine the areas of the proposed work, to see first hand the extent of work involved. The submission of a proposal will be considered evidence that the bidder has made such examination and is satisfied as to the conditions to be encountered in performing the work.

The FAA Contracting Officer will provide a date for one official site visit with the Engineer. If any other visits are needed, Contractor must give FAA at least five days advance notice before appearing on site. All visitors must be escorted by an FAA employee, or other authorized personnel.

4.0 LOCATION

FAA GRD VOR

Greenwood County Airport Greenwood, SC N34° 15’ 05.638” W85° 09’ 14.936” Elev. 630.0 MSL

5.0 CONTACTS

Marty Duvall, SSC Mgr. WEV44-GSP Shane C. Harvey, FAA Engineering FAA Greer SSC 1701 Columbia Ave 200 GSP Drive, Suite 5 College Park, GA 30337 Greenville-Spartanburg Int’l Airport w:404.305.7447 c:404.632.9774 Greer, SC 29651-9202 w:864.877.7477 c:864.607.8949 email: shane.c.harvey@faa.gov email: marty.duvall@faa.gov

Robert Sowers, SSC Coordinator WEV44-GSP FAA Greer SSC 200 GSP Drive, Suite 5 Greenville-Spartanburg Int’l Airport Greer, SC 29651-9202 w:864.877.7477 c:704.297.5138 email: Robert.sowers@faa.gov

6.0 FAA USE ONLY

JCN: 1505934

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mailto:shane.c.harvey@faa.gov mailto:marty.duvall@faa.gov mailto:Robert.sowers@faa.gov