Specs.pdf

Precast and Install Concrete Foundations for the RW 1C Precision Approach Path

Indicator (PAPI) system at Dulles International Airport

Remove existing steel foundations that are heaving out of the ground at the OSZ PAPIs at IAD and install precast concrete foundations.

DULLES INTERNATIONAL AIRPORT JANUARY 2015

RUNWAY 1C PAPI FOUNDATIONS

GENERAL REQUIREMENTS 01 11 00-1

SECTION 01 11 00 - GENERAL REQUIREMENTS

PART 1-GENERAL

1.1 SUMMARY

A. Project Location:

Dulles International Airport Chantilly, VA

B. Scope of Work: These specifications, together with the referenced specifications, standards, and drawings specified in the Contract Documents, cover the requirements of the Federal Aviation Administration (FAA) for all work associated with:

C. Fabricate and install 4 pre-cast concrete foundations for the Runway 1C Precision Approach Path

Indicator (PAPI) light system as follows.

1. Fabricate 4 PAPI LHA foundations per attached Drawing TSC-15-120-003

2. Deliver foundations to Airport to site designated by the FAA

3. Remove and dispose of existing concrete pad at each one of 4 PAPI LHA units

4. Remove and dispose of existing steel “Safe Foundations” at each LHA

5. Excavate for installation of precast foundations per drawing TSC-15-120-003

6. Set foundations in locations shown on Drawing TSC-15-120-004

7. Reinstall PAPI LHAs on new foundations using new stainless steel hardware.

D. Contract Documents: Drawings, included as attachments:

DWG#TSC-15-120-001 LOCATION AND SITE PLAN

DWG#TSC-15-120-002 DEMOLITION PLAN

DWG#TSC-15-120-003 FABRICATION INSTALATION

DWG#TSC-15-120-004 SITE PLAN

1.2 CONSTRUCTION LIMITS AND ACCESS

A. The work involves excavation and installation with the use of a crane in close proximity of Runway 1 Center. The project location is also adjacent to other FAA operated navigational aids.

Close coordination with the local FAA representatives and the Metropolitan Washington Airports Authority (MWAA) will be required at all times.

B. The installation contractor will be required to hold a valid Virginia contractor’s license to work on the airport

1.3 FACILITY PROTECTION/PRECAUTIONS

GENERAL REQUIREMENTS 01 11 00-2

A. Care shall be taken to do no damage to existing buildings roads or other FAA equipment near the work area. Damage to government property caused by the contractor shall be repaired or replaced at the sole cost of the contractor.

1.4 USE OF FACILITIES

A. Electrical power is not available at the site for use by the contractor. There is no water or rest room facility at the site. Providing rest room facilities will be the responsibility of the contractor.

The location of the rest room facility will be approved by the FAA.

B. The project work area, laydown area and other adjacent surfaces used by the contractor shall be kept in clean, neat manner. Daily cleaning (or more if necessary) shall take place to prevent the accumulation of waste materials, rubbish, wind-blown debris, dust and odors resulting from construction operations. Contractor shall conduct cleaning and disposal operations to comply with local, state and federal codes, ordinances, regulations and anti-pollution laws. The contractor shall provide on-site containers for the collection of waste materials, debris and rubbish. The site shall be thoroughly cleaned of all debris at the end of each work day. FAA dumpsters/trash bins/trash cans shall not be used by the contractor.

1.5 TEMPORARY FACILITIES

A. The contractor will be responsible for providing temporary bathroom facilities for employees.

B. A laydown area for the storage of the precast foundations will coordinated through the FAA,

1.6 PROJECT COORDINATION

A. It shall be the duty of the Contractor to prepare a detailed schedule of work and work layout to resolve conflicts and to assure coordination of the work by different trades.

1.7 WORKING HOURS

A. The work area is within the runway safety area. Work will be done during periods of time directed by MWAA when the runway can be shut down. Runway shutdowns less than 1-1/2 hours in duration may be tolerated during normal working hours at off peak hours. Longer runway closures will need to be done after normal working hours. These shutdown periods will normally be in the evening between 10:00 PM and 5:00 AM. No excavations will be allowed to be open overnight. One LHA foundation will be worked on at a time. The foundation will be removed, new excavation dug and new foundation set during a single runway shut down.

1.8 PROJECT DURATION

A. Work shall be completed within 45 days from the notice to proceed.

END OF SECTION 01 11 00

PLANT PRECAST STRUCTURAL CONCRETE 03 40 00-1

SECTION 03 40 00 - PLANT-PRECAST STRUCTURAL CONCRETE

PART 1 – GENERAL

1.1 SUMMARY

A. This Section includes the following precast concrete units:

1. Foundations for PAPI LHAs

1.2 PERFORMANCE REQUIREMENTS

A. Structural Performance: Provide precast structural concrete units and connections per the attached specifications and drawings.

B. Concrete Strength:

Provide Precast Concrete units with 28 day compressive strength of 3,000 PSI.

C. Air Content: The air content of concrete that will be exposed to freezing conditions shall be within the limits given below.

AIR CONTENT PERCENT

NOMINAL MAXIMUM AGGREGATE SIZE SEVERE EXP MODERATE EXP

3/8 inch 6.0 to 9.0 4.5 to 7.5 1/2 inch 5.5 to 8.5 4.0 to 7.0 3/4 inch 4.5 to 7.5 3.5 to 6.5

1.0 inch 4.5 to 7.5 3.0 to 6.0

1.5 inch 4.5 to 7.0 3.0 to 6.0

1.3 SUBMITTALS

A. Product Data: For each product indicated.

B. Design Mixes: For each concrete mix.

C. Shop Drawings: Detail fabrication and installation of precast structural concrete units.

Indicate member locations, plans, elevations, dimensions, shapes, cross sections, openings, and types of reinforcement, including special reinforcement.

1.4 QUALITY ASSURANCE

PLANT PRECAST STRUCTURAL CONCRETE 03 40 00-2

A. Fabricator Qualifications: A qualified fabricator firm that assumes responsibility for engineering precast structural concrete units to comply with performance requirements.

B. Design Standards: Comply with ACI 318 and the design recommendations in PCI MNL 120, "PCI Design Handbook--Precast and Prestressed Concrete."

C. Quality-Control Standard: Comply with PCI MNL 116, "Manual for Quality Control for Plants and Production of Precast and Prestressed Concrete Products."

D. Welding: Qualify procedures and personnel according to AWS D1.1, "Structural Welding Code--Steel"; and AWS D1.4, "Structural Welding Code--Reinforcing Steel."

1.5 DELIVERY, STORAGE, AND HANDLING

A. Store units at Project site to prevent cracking, distorting, warping, staining, or other physical damage, and so markings are visible. A laydown area will be designated by the FAA COTR.

B. Lift and support units only at designated lifting and supporting points shown on Shop Drawings.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Steel Reinforcement:

1. Reinforcing Bars: Epoxy Coated Reinforcement ASTM A775.

2. Wires and Fabric: ASTM 884/

3. Insert and embedded metals: All lifting lugs installed in foundations to facilitate rigging and placing in excavations shall be installed on the side of foundations.

B. Concrete:

1. Portland Cement: ASTM C 150, Type I or Type III, of same type, brand, and source.

2. Normal-Weight Aggregates: .

3. Air-Entraining Admixture: ASTM C 260.

4. Fly Ash Admixture: ASTM C 618, Class C or F.

5. Metakaolin Admixture: ASTM C 618, Class N.

6. Silica Fume Admixture: ASTM C 1240.

C. Steel Connections:

1. Carbon-Steel Shapes and Plates: ASTM A 36/A 36M.

2. Carbon-Steel Headed Studs: ASTM A 108, AISI 1018 through AISI 1020, cold finished; AWS D1.1, Type A or B, with arc shields.

3. Carbon-Steel Bolts and Studs: ASTM A 307, Grade A carbon-steel, hex-head bolts and studs; carbon-steel nuts; and flat, unhardened steel washers.

4. Finish: Epoxy coated

2.2 CONCRETE MIXES

PLANT PRECAST STRUCTURAL CONCRETE 03 40 00-3

A. Prepare design mixes for each type of concrete required.

B. Normal-Weight Concrete: Proportion mixes by either laboratory trial batch or field test data methods according to ACI 211.1, with materials to be used on Project, to provide normal-weight concrete with the following properties:

1. Compressive Strength (28 Days): 3000PSI

2. Maximum Water-Cementitious Materials Ratio: 0.40.

3. Air Content: 6 percent with a tolerance of plus or minus 1-1/2 percent 4.5 to 7.5 percent.

2.3 FABRICATION

A. Built-in Anchorages: Accurately position built-in anchorage devices and secure to formwork. Locate anchorages where they do not affect position of main reinforcement or concrete placement. Do not relocate bearing plates in units unless approved by Architect.

B. Reinforcement: Comply with recommendations in CRSI's "Manual of Standard Practice" for fabricating, placing, and supporting reinforcement.

C. Mix concrete according to PCI MNL 116 and requirements in this Section. After concrete batching, no additional water may be added.

D. Place concrete in a continuous operation to prevent seams or planes of weakness from forming in precast concrete units. Comply with requirements in PCI MNL 116 for measuring, mixing, transporting, and placing concrete.

E. Identify pickup points of precast concrete units and orientation in structure with permanent markings, complying with markings indicated on Shop Drawings. Imprint casting date on each precast concrete unit on a surface that will not show in finished structure.

F. Cure concrete, according to requirements in PCI MNL 116, by moisture retention without heat or by accelerated heat curing using low-pressure live steam or radiant heat and moisture.

G. Product Tolerances: Fabricate precast structural concrete units straight and true to size and shape with exposed edges and corners precise and true so each finished unit complies with PCI MNL 116 product tolerances.

H. Finish formed surfaces of precast structural concrete as indicated for each type of unit, and as follows:

1. Standard Finish: Normal plant-run finish produced in forms that impart a smooth finish to concrete. Small surface holes caused by air bubbles, normal color variations, form joint marks, and minor chips and spalls will be tolerated. Major or unsightly imperfections, honeycombs, or structural defects are not permitted.

PLANT PRECAST STRUCTURAL CONCRETE 03 40 00-4

I. Screed finish unformed surfaces. Strike off and consolidate concrete with vibrating screeds to a uniform finish. Hand screed at projections.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install precast structural concrete. Shore and brace precast concrete units to maintain location, stability, and alignment until permanent connections are installed.

B. Erection Tolerances: Install precast concrete units level, plumb, square, and true, without exceeding the recommended erection tolerances in PCI MNL 127, "Recommended Practice for Erection of Precast Concrete."

C. Clean exposed surfaces of precast concrete units after erection to remove weld marks, other markings, dirt, and stains.

END OF SECTION 03410