QDG Tower Leg Inspection SOW (9-9-25).pdf

STATEMENT OF WORK

Federal Aviation Administration (FAA) Douglaston Remote Communications Link (RCL)

Inspection and Structural Analysis of Buried Tower Legs Douglaston, NY

1.0 Background

The Federal Aviation Administration (FAA) Douglaston (QDG), NY is located at the corner of 63rd Avenue and 251st Street, Douglaston, Queens, NY. The facility site consists of five (5) self-supporting towers of various heights and ages that support communications antennas, an equipment building and underground/overhead radio frequency cables. The exact construction date of facility is unknown, however, earliest drawings for the site are dated 3/19/1951.

The two (2) 129’ towers (highlighted) are assumed to be supported by direct-buried structural steel legs (no concrete foundation). During a recent general inspection of the 129’ towers, the FAA inspection team dug out a portion of each buried steel tower leg and noted that the buried sections of the steel for each leg is showing signs of rust and material loss just below ground level. Initial testing indicated material loss up to 40%.

Due to the above findings, the two (2) towers have been marked as “Do Not Climb” by the FAA. All maintenance requiring climbing has been halted until comprehensive testing, inspection, and structural analysis is performed by a qualified engineering firm to determination if each tower and buried foundation is:

- structurally sound and is safe to remain in place, or

- structurally unsound and structural repair is needed to bring the tower(s) back to a condition that is safe, or

- structurally unsound, unrepairable and tower must be demolished as soon as possible.

2.0 Scope of Work

Provide all labor, tools, equipment, materials, rigging, and supervision required for the following:

1. Perform underground detection (i.e. ground penetration radar) to determine/confirm the underground foundation construction for each tower.

2. Hand-excavate around each tower leg (8 total) and buried tower steel sections to expose the required amount of steel to perform inspection and non-destructive testing. The excavation depth shall not impact the stability of the tower. Backfill and compact excavated areas after inspection and testing is complete.

3. Perform inspection, non-destructive testing, scanning and analysis of each tower and buried steel leg foundation.

4. Provide an inspection/structural condition report signed and sealed by a New York State licensed engineer for each tower. Each report shall consist of any field notes, photos, material loss findings/testing results, structural calculations, determination if each direct-buried steel foundation is capable of supporting the respective tower, tower condition, and structural repair recommendations.

3.0 Existing Site Conditions

Tower #2

Fabricator: Unknown

Age: 70+ years

Tower Type: FAA Form 7 Steel Self-Supporting Four-Sided Tower System

Tower Height: 129’ self-supporting four-sided steel tower with ladder, work platform, eight (8) fiberglass communication antenna, multiple runs of radio frequency (RF) cables and electrical conduit.

Tower Foundation: Direct earth buried steel legs (see 570-B and C-2065-1)

Tower Design Criteria/Loading: Unknown

Soil Bearing Capacity: Unknown

Tower #3

Fabricator: Unknown

Age: 70+ years

Tower Type: FAA Form 7 Steel Self-Supporting Four-Sided Tower System

Tower Height: 129’ self-supporting four-sided steel tower with ladder, work platform, nine (9) fiberglass communication antenna and multiple runs of radio frequency (RF) cables and electrical conduit.

Tower Design Criteria/Loading: Unknown

Tower Foundation: Direct earth buried steel legs (see 570-B and C-2065-1)

Soil Bearing Capacity: Unknown

4.0

Restrictions and Security Concerns:

The Contractor is advised that the towers are part of a secured facility and all personnel, possessions, equipment, materials, vehicles, etc. are subject to inspection while on the premises. All Contractor personnel shall maintain on their person, at all times while on the grounds, current photo identification.

The Contractor shall provide the FAA Site Representative with a list of the personnel requiring access to the site. This list shall include the employee's full name and the date of birth. It will be necessary to coordinate all activities with the FAA Site Representative to minimize interference with site operations.

The Contractor shall be escorted into and out of the site each day. Contractor is not permitted to work on-site without FAA escort.

Special Contractor Requirements:

The following is a list of special requirements the Contractor will need to be aware of:

Pre-Construction Meeting - The Contracting Officer (CO) shall arrange a conference at a mutually agreeable time and date after the contract has been awarded. It will be mandatory that key Contractor personnel and their representatives attend.

Work Schedule - Normal work hours shall be from 7 am to 2:30 pm, Monday through Friday. All work outside of the normal time frame will be coordinated with the Contracting Officer Representative (COR). The contractor shall give a minimum of 48-hour notice prior to commencing with work outside of normal work hours.

Applicable Regulations:

All work shall be performed in accordance with Federal, state, and local regulatory requirements. In cases where regulations and/or contract documents are conflicting or discrepancies occur, the more stringent requirement shall be followed and enforced. Applicable regulations include, but are not limited to:

Occupational Safety and Health Administration (OSHA)

American Institute Steel Construction (AISC)

American National Standards Institute (ANSI)

• TIA-222-H or later Structural Standard for Antenna Supporting

Structures and Antennas.

REFENCE DRAWINGS

570-B, dated 05/01/1931 – Extension for 51’ Airways Tower 2065-1, dated 04/26/1940 – Foundation Detail for 51’ and Higher Towers 1-E-3460, dated 03/19/1951 – Douglaston Radio Link (Vicinity Sketch/Plot Plan)

FAA TOWER INSPECTION REPORTS

Douglaston Tower #2 Inspection Report Dated 07/27/2023 Douglaston Tower #3 Inspection Report Dated 07/27/2023

SITE LOCATION MAP

Joseph Henn Callout

DOUGLASTON RCL LOCATION

DRAWING 570-B

DRAWING 2065-1

SITE PHOTOS