Statement of Work BAK12 Anchor Replacement.pdf

STATEMENT OF WORK

REPAIR OF BAK-12 AIRCRAFT ARRESTING SYSTEM

BOTTOM SLAB AND ANCHOR BOLT REPLACEMENT

at Fresno ANGS

August 14, 2026

144TH FIGHTER WING

CALIFORNIA AIR NATIONAL GUARD

FRESNO AIR NATIONAL GUARD STATION

STATEMENT OF WORK (SOW)

1.0 GENERAL PROJECT DESCRIPTION

This Statement of Work (SOW) defines the requirements for the contractor to repair the concrete foundation slab of the BAK-12 Aircraft Arresting System (AAS) and replaces all eight (8) of its critical foundation anchor bolts.

All work under this contract shall be performed at the following location:

Location: Fresno Air National Guard Station, 5323 E. McKinley Ave., Fresno, CA

93727.

Specific Site: Runway Arresting System (BAK-12) pits/slabs, as coordinated and designated by the Base Civil Engineer (BCE) and Airfield Management.

All work must be executed in accordance with Air National Guard Engineering Technical Services (ANGETS), Air National Guard Engineering Technical Letters (ANGETL), Air Force Manual (AFMAN) 32-1040, and the Department of Defense Unified Facilities Criteria (UFC).

2.0 APPLICABLE GOVERNING STANDARDS

The Contractor shall perform all work in strict compliance with the latest editions of the following military and federal specifications:

Military & Federal Standards

FC 3-260-18F: Air Force Aircraft Arresting Systems (AAS) Installation, Operation, and Maintenance FC 3-260-18F.

AFMAN 32-1040: Civil Engineering Airfield Infrastructure AFMAN 32-1040.

UFC 3-260-01: Airfield and Heliport Planning and Design.

TO 35E8-2-5-1: Operation and Maintenance Instructions – Aircraft Arresting System

Model BAK-12.

USAF Standard Drawing Set 67F2013A: BAK-12 Installation Drawings and Concrete

Foundations.

USACE EM 385-1-1: Safety and Health Requirements Manual (U.S. Army Corps of

Engineers).

Industry Standards

ACI 318 / ACI 301: American Concrete Institute Standards for Structural Concrete.

ASTM A615/A615M: Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement.

ASTM F1554: Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield

Strength.

ASTM C881/C881M: Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete.

ASTM C309: Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete.

3.0 SCOPE AND ORDER OF WORK

The Contractor shall furnish all labor, materials, equipment, and engineering services required to complete the concrete slab repair and anchor bolt replacement in the following sequential order:

Step 1: Saw Cutting the Bottom Slab

1. Marking and Layout: The Contractor shall precisely locate the existing eight (8) anchor bolts on the BAK-12 bottom slab.

2. Perimeter Saw Cutting: The Contractor shall perform full-depth perimeter saw cuts forming an 8-foot by 4-foot (8'x4') rectangular boundary centered directly over the existing anchor bolt configuration to completely envelop all eight existing anchor bolts.

3. Execution Requirements: Saw cuts must be perfectly straight and vertical. Overcutting at corners shall be minimized by auguring a four (4”) inch minimum diameter cylinder the full depth of the existing concrete to prevent propagation cracks in the remaining airfield pavement, complying with ACI standards for pavement repair. Water runoff from the wet-sawing operation must be vacuumed immediately to prevent contamination of the surrounding airfield joint seals, or active pavement.

Step 2: Excavation and Base Removal

1. Demolition: The Contractor shall break and remove the existing concrete within the 8'x4' saw-cut perimeter using lightweight handheld jackhammers (not exceeding 40 lbs unless approved by the Base Civil Engineer) to prevent damage to the surrounding structural slab.

2. Excavation Depth: The Contractor shall excavate and remove all concrete debris, underlying aggregate base, and subgrade material to a minimum depth of 2.0 feet (24 inches) below the existing bottom slab's base elevation.

3. Subgrade Preparation: The excavated bottom must be leveled, hand-tamped, and verified for stability. Any soft spots or unsuitable soil must be excavated and replaced with approved compacted crushed aggregate base (CAB) meeting UFC 3-260-01 requirements.

Step 3: Drilling and Installing Anchor Dowels

1. Hole Alignment and Layout: The Contractor shall drill dowel holes horizontally into the vertical faces of the remaining existing concrete base. The drilling pattern must be designed to align precisely with the spacing of the existing structural rebar cage.

2. Drilling Specifications: Holes shall be drilled using rotary hammer drills. The depth and diameter of the holes must conform to the epoxy manufacturer's requirements for structural load transfer (typically a minimum embedment depth of 10xd, where d is the dowel diameter).

3. Adhesive Doweling: Clean the drilled holes thoroughly using wire brushes and compressed air to remove all dust, laitance, and standing water. Install steel dowels using an approved, high-strength structural epoxy adhesive conforming to ASTM C881 (Type IV, Grade 3, Class B/C).

Step 4: Rebar Cage Fabrication

1. Material Standards: Rebar must be deformed steel bars conforming to ASTM A615, Grade 60.

2. Cage Fabrication: The Contractor shall construct a new steel reinforcing cage utilizing #5 rebar. The reinforcement design, spacing, and grid pattern must match the existing structural reinforcing pattern as detailed in USAF Standard Drawing 67F2013A.

3. Installation and Clearances: The cage must be securely tied with 16-gauge tie wire and placed on approved concrete support chairs to ensure a minimum concrete cover of 3 inches from the bottom of the excavation and 2 inches from the saw-cut side walls. Tie the new cage securely to the structural dowels installed in Step 3.

Step 5: Setting Eight (8) New BAK-12 Anchor Bolts

1. Anchor Bolt Specifications: The Contractor shall supply eight (8) new high-strength steel anchor bolts conforming to TO 35E8-2-5-1 specifications and standard drawing 67F2013A (ASTM F1554, Grade 55 or Grade 105, or as specified by the system manufacturer).

2. Alignment Template: The Contractor shall fabricate and utilize a rigid steel or plywood template matching the exact dimensions of the BAK-12 energy absorber baseplate to hold the eight (8) anchor bolts in perfect alignment, vertical plumb, and spatial coordinates during the concrete pour.

3. Tolerance Requirements: The tolerances for bolt placement must be absolute. The centerline of the bolt group must not deviate by more than $\pm 1/16$ inch, and the projected height must be verified against original drawings to ensure proper thread engagement when the BAK-12 is mounted.

Step 6: Concrete Placement and Finishing

1. Base Layer Preparation: Prior to pouring concrete, the Contractor shall place and compact a 0.5-foot (6-inch) thick layer of high-density crushed aggregate subbase at the bottom of the excavation, ensuring the remaining vertical space for concrete is exactly

1.5 feet (18 inches).

2. Concrete Mix Design: The concrete must be an airfield-strength Portland Cement Concrete (PCC) mix design. The minimum compressive strength must be 5,000 PSI at 28 days (or a rapid-set concrete repair mix reaching equivalent strength as approved by the Base Civil Engineer and major command/ANG airfield requirements). Contractor must prepare a minimum of four test cylinders per 8 yards of concrete for compressive testing.

3. Placement: Deposit the concrete into the repair area, utilizing mechanical immersion vibrators to consolidate the mixture around the dense #5 rebar cage and anchor bolts, ensuring zero honeycombing or air pockets.

4. Finishing and Leveling: Screed and finish the concrete surface to be perfectly flush with the adjacent existing slab base elevation. Apply a non-slip, light broom finish.

5. Curing: Apply a curing compound meeting ASTM C309 or initiate a continuous moist cure for a minimum of 7 days (or until compressive tests indicate the patch has reached at least 3,500 PSI or 70% of design strength) before applying any deadload.

Step 7: BAK-12 System Re-installation

1. Preparation: Once curing is complete and compressive strength verified, remove the alignment template and clean the anchor bolt threads.

2. Standard Installation Procedures: The Contractor shall reinstall the BAK-12 energy absorber units onto the new anchor bolts, following the certified step-by-step procedures outlined in TO 35E8-2-5-1.

3. Tensioning and Alignment: Torque all anchor nuts to the manufacturer's specified values. Re-align the tape exit paths, reeve the purchase tapes, and connect the standard runway pendant cable.

4. Certification and Testing: Coordinate with base personnel to undergo standard system certification testing prior to restoring the runway to active flight status.

4.0 Airfield Safety & Environmental Requirements

Foreign Object Debris (FOD) Control: The Contractor is working directly in an airfield environment. The Contractor shall maintain extreme cleanliness. At the end of every shift, the site must be thoroughly swept, and all tools, concrete debris, and dust must be accounted for and removed.

Haul Routes and Escorts: All personnel must be escorted or cleared for airfield access.

Vehicles must operate strictly within approved haul routes.

Airfield Markings & Safety Zones: Keep all equipment out of active Runway Safety Areas (RSA) unless coordinated with Airfield Management.

5.0 SAFETY, HEALTH, AND ENVIRONMENTAL REQUIREMENTS

5.1 Safety and Health Requirements (USACE EM 385-1-1)

Accident Prevention Plan (APP): The contractor shall submit a site-specific APP in compliance with USACE EM 385-1-1 requirements for BCE approval before any on-site work begins.

Activity Hazard Analysis (AHA): The APP must include a detailed AHA for each phase of work (demolition, drilling, concrete pouring, and heavy lifting) to identify potential safety hazards and implement mitigation strategies.

Personal Protective Equipment (PPE): All contractor personnel must wear appropriate PPE, including high-visibility vests, steel-toed boots, safety glasses, hearing protection, and hard hats, in accordance with base safety policies.

5.2 Environmental Compliance

Stormwater and Runoff Control: The contractor shall implement Best Management

Practices (BMPs) to prevent concrete slurry, dust, or wet-saw water from entering storm drains or joint seals.

Waste Management Plan: The contractor shall submit a Waste Management Plan detailing how demolition debris, concrete washout, and packaging materials will be collected, transported, and disposed of at an approved off-base municipal site.

6.0 PROJECT DELIVERABLES & SUBMITTALS

The Contractor must submit the following documents to the Base Civil Engineer (BCE) for formal review and approval. No on-site work shall begin until all pre-construction submittals have been approved in writing.

Submittal ID Description Stage Standards Referenced

SUB-01 Accident Prevention Plan

(APP) & AHA

Pre- Construction USACE EM 385-1-

Rev1 Contractor Quality Control Plan (QCP)

Pre- Construction FAR 52.246-12

SUB-03 Detailed Project Schedule (Gantt Chart)

Pre- Construction FAR Part 11

SUB-04 Waste Management Plan Pre-Construction ACI / Local Regs SUB-05 Concrete Mix Design

Certification (5,000 PSI) Pre-Construction ACI 318 / ACI 301

SUB-06 Product Data Sheets (#5 rebar, ASTM F1554 anchor bolts, ASTM C881 structural epoxy, ASTM C309 curing compound)

Pre-Construction ASTM Standards

SUB-07 Personnel Qualifications (e.g., ACI certified concrete finishers)

Pre-Construction ACI Standard

SUB-08 Daily Construction Reports Construction (Daily) FAR Clause SUB-09 Post-Construction Core Test /

Cylinder Break Reports Post-Construction ACI 318 / SOW

Sec 5

7.0 SOURCES & REFERENCES

FC 3-260-18F: Air Force Aircraft Arresting Systems (AAS) Installation, Operation, and Maintenance

AFMAN 32-1040: Civil Engineering Airfield Infrastructure Unified Facilities Criteria (UFC): Whole Building Design Guide (WBDG) repository for DoD Unified Facilities Criteria.

8.0 PERIOD OF PERFORMANCE

Total Performance Period: All work, including submittal approval, site preparation, demolition, concrete placement, curing, BAK-12 re-installation, and cleanup, shall be completed within sixty (60) calendar days from the issuance of the formal Notice to Proceed (NTP).

On-Site Operational Window: Due to active runway operations, the contractor's actual on-site construction window shall be highly coordinated with Airfield Management to minimize runway downtime. The contractor shall establish a precise work schedule detailing daily shifts, which must be approved by the BCE prior to beginning on-site work.