Specifications for ELPA RCAG Walkway and Handrails.pdf

FEDERAL AVIATION ADMINISTRATION DECEMBER 5, 2022

ELPA RCAG WALKWAY REPLACEMENT

00 01 10 – TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 10 00 SUMMARY OF WORK

01 31 00 S PROJECT MANAGEMENT AND COORDINATION

01 33 00 SUBMITTAL PROCEDURES

01 50 00 TEMPORARY FACILITIES AND CONTROLS

01 71 33.10 PROTECTION OF WORK AND PROPERTY

01 77 00 CLOSEOUT PROCEDURES

DIVISION 3 – CONCRETE

03 30 00 CAST-IN-PLACE CONCRETE (FOR HANDRAILS SUPPORT)

DIVISION 4 – MASONRY

04 01 40.61 STONE REPAIR

DIVISION 5 – METALS

05 52 13 TUBE RAILINGS

DIVISION 31 – EARTHWORK

31 20 00 SITE CLEARING AND EARTH MOVING

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 13 13 CONCRETE PAVING

APPENDIX 1 – ATTACHMENTS

ATTACHMENT 1 SITE PHOTOS

ATTACHMENT 2 EOSH Impacts CSA EOSH Checklist Form 3900-17 Form 3900-18 Form 3900-19

ATTACHMENT 3 DRAWINGS

END OF SECTION 00 01 10

DIVISION 01 – GENERAL REQUIREMENTS

SECTION 01 10 00 - SUMMARY

PART 1 - GENERAL

1.1 SUMMARY

A. This specification covers general requirements for the replacement of walkway and construction of handrail at the ELPA RCAG site at El Paso, TX on Mt. Franklin. In general, all parts of this Specifications covering construction require on project drawings and other Contract documents are applicable to this Contract.

B. The Contractor shall furnish all plant, labor, materials, equipment, energy, transportation, and other services necessary to construct all elements of the systems required in the Specifications, Drawings, and other Contract documents. Construction shall include all miscellaneous and incidental work necessary for a complete walkway, whether such work is specifically shown or specified.

1.2 WORK COVERED BY CONTRACT DOCUMENTS

A. Project Information

1. Site Identification: ELPA RCAG

2. Project Location: LAT 31°51'50.82"N, LON 106°29'28.64"W

3. Project Engineer: Sary Sancen, 817-253-0629

B. The Work consists of, but not limited to the following:

1. Coordinate with local FAA SSC personnel and commercial cable locators to locate and mark all underground utilities prior to excavating.

2. Remove existing sidewalk and reconstruct new concrete sidewalk.

3. Repair rockwall supporting short section of the walkway (about 8-10 ft). Remove old crumbling mortar and pull out misaligned rocks. Replace stones as necessary and match mortar color to existing. New rockwall shall have an aligned clean look.

Note: A specialized worker with experience in rockwall construction must complete this work.

4. Construct new aluminum handrails, per OSHA standards, on the west side of one section of the walkway, approximately 330ft.; and on both sides of the walkway for the second section of the walkway approximately 480 feet. Contractor to verify length.

a. Handrail posts shall be supported on small concrete piers.

5. Clean up side on daily basis. Dispose of debris at approved waste site. Restore all areas disturbed by construction activity or vehicles per specifications.

6. Participate in CAI and address punch list items if any.

C. All material and equipment shall be contractor furnished.

1.3 ADDITIONAL REQUIREMENTS

A. The existing walkway is the only means to which personnel can access the buildings. Personnel may be required to access the buildings during construction; therefore, the Contractor will be required to have temporary plates as necessary and as determined by local FAA.

1. Plates shall be wide enough to cover the width of the walkway.

2. Plates shall be slip resistant.

3. Contractor shall have a submittal for this material approved by FAA prior to purchase and use.

1.4 SITE VISIT

A. It is recommended that the Contractor perform a field inspection prior to bid submission in or-der to inform himself of the specific working conditions applicable at the site and to ascertain the correct types/amounts of work to be performed. If the bidder chooses not to visit the site, he will nevertheless be charged with knowledge of conditions that a reasonable inspection would have disclosed. A site visit date will be set up by the Contracting Officer and the Facility Manager. Prospective bidders shall contact the Contracting Officer (CO) for the date and time.

B. Site Limitations: Contractor shall be advised that the site is located on Mt. Franklin Peak where it is inaccessible via vehicles. Only a tram exists that allows no more than four persons to travel up the mountain. It is the Contractors responsibility to obtain means to transport equipment and material up to the site.

1.5 WORK RESTRICTIONS

A. On-Site Work Hours: Work shall be generally performed during normal business working hours between 7 a.m. to 5 p.m., Monday through Friday, except otherwise indicated at the preconstruction meeting.

1. No work will be performed on weekends and federal holidays.

2. Work shall be performed during a scheduled work week of 40 hours.

3. Any work outside of the shift will be considered overtime work. The Contractor would need to submit a formal request to the Contracting Officer or Contracting Officer Representative well in advance if meaning to work overtime.

4. The start and stop times shall typically be coordinated with the schedules of the FAA COR or facility personnel to minimize or prevent the need for overtime work by FAA personnel.

B. Expected job duration: Twenty (20) business days.

C. Nonsmoking Building: Smoking is not permitted within the building or within 25 feet of entrances, operable windows, or outdoor air intakes.

1.6 SANITARY FACILITIES

A. Restroom facilities are not available on site. Temporary facilities shall be provided by the Contractor as required to meet the needs of the tradespeople.

END OF SECTION 01 10 00

SECTION 01 31 00 - PROJECT MANAGEMENT AND COORDINATION

1.1 COORDINATION

A. All correspondence between the contractor and FAA must be through the FAA’s Contracting Officer (CO) or the Contracting Officer’s Representative (COR).

B. At no expense to the FAA, procure all construction and working permits required by local and state agencies.

C. Pre-Construction Conference: The contractor shall attend a pre-construction conference when required by the contracting officer. The contractor shall abide by all agreements reached at the conference regarding safety practices, access to site, and any other operational procedures.

D. Safety Meeting: Contractor shall hold a tailgate safety meeting prior to commencement of work each day, in the presence of the COR to discuss possible safety hazards and mitigation.

E. All work must be accomplished by experienced workers in accordance with the highest stand-ards of the various work trades involved. Workers must abide by safety requirements, set forth by OSHA, that correspond to the type of work being performed.

F. Contractor’s Warranty: The Contractor shall warrant all work performed to be in accordance with contract requirements and free from defective or inferior materials, equipment, and work-manship for one year from the date of final acceptance of the contract work by the Government.

1.2 HAZARDOUS MATERIAL AND SAFETY

A. The Contractor shall provide workers protection per OSHA 29 CFR 1926.62.

B. The Contractor shall be responsible for safety on the work site. It is the responsibility of the Contractor to eliminate hazards which may result in tripping, electrical shock, fire, falling ob-jects, environmental hazards, vehicular accidents, etc. The Contractor shall comply with all safety precautions required by OSHA. The Contractor shall have two l5 lb. Class B and C fire extinguishers at the work area through the progress of welding, metal cutting, or any other pro-cess involving a spark or fire hazard.

END OF SECTION 01 31 00

SECTION 01 33 00 – SUBMITTAL PROCEDURE

1.1 SUBMITTALS AND PROCEDURES

A. Contractor shall submit list of materials for FAA approval. No materials shall be installed without prior FAA approval.

B. As-Built Drawings: Contractor shall maintain a complete set of construction drawings at the site, and make daily annotations to document as-built conditions. At project completion, and prior to final payment, the contractor shall submit red-lined as-built drawings to COR.

C. Processing Time: Allow 15 days for submittal review. A resubmittal would require additional time. No extension of the Contract Time will be authorized because of failure to transmit submittals enough in advance of the Work to permit processing, including resubmittals.

D. Substitutions: Substitute products shall not be ordered or installed without written acceptance by FAA. In making a formal request for substitution, the Contractor represents that they have investigated the proposed product and have determined that it is equal to or superior in all respects to that specified.

E. Procurement Before Approval: The contractor is advised not to procure any item for which submittal approval is required but not yet granted. If approval is denied, the contractor will be prevented from installing the disapproved item(s). The contractor must transmit a new submittal package for the new items replacing the disapproved items, and must procure only approved items. The contractor shall take responsibility for the delivery and installation of any items installed before submittal approval is granted. The FAA reserves the right to discontinue field work on any item furnished without submittal approval. Procuring and/or installing material which is later disapproved could result in substantial losses of money and time for the contractor.

END OF SECTOIN 01 33 00

SECTION 01 50 00 - TEMPORARY FACILITIES AND CONTROLS

1.1 SECURITY AND PROTECTION FACILITIES INSTALLATION

A. Environmental Protection: Provide protection, operate temporary facilities, and conduct construction in ways and by methods that comply with environmental regulations and that minimize possible air, waterway, and subsoil contamination or pollution or other undesirable effects.

B. Temporary Erosion and Sedimentation Control: Provide measures to prevent soil erosion and discharge of soil-bearing water runoff and airborne dust to adjacent property and walkways, according to requirements of authorities having jurisdiction.

1. Inspect, repair, and maintain erosion- and sedimentation-control measures during construction, as necessary.

2. Remove erosion and sedimentation controls and restore and stabilize areas disturbed during removal.

END OF SECTION 01 50 00

SECTION 01 71 33.10 – PROTECTION OF WORK AND PROPERTY

1.1 PROTECTION AND RESTORATION OF PROPERTY AND LANDSCAPE: The contractor shall be responsible for the preservation of all public and private property. The Contractor shall be responsible for all damage or injury to property of any character, during the prosecution of the work, resulting from any act, omission, neglect, or misconduct in its manner or method of executing the work, or at any time due to defective work or materials, and said responsibility will not be released until the work is completed and accepted. It will be up to the Contractor to restore damage at its own expense and no additional cost to the Government.

END OF SECTION 01 71 33.10

SECTION 01 77 00 – CLOSEOUT PROCEDURES

1.1 GENERAL

A. Contractor shall participate in Contractor Acceptance Inspection (CAI) and shall address all punch list items generated by FAA.

B. Prepare and submit redline drawings.

C. Complete final cleaning requirements.

1.2 FINAL CLEANING

A. General: Provide final cleaning. Conduct cleaning and waste-removal operations to comply with local laws and ordinances and Federal and local environmental and antipollution regulations.

B. Clean project site in areas disturbed by construction activities, including landscape development areas, of rubbish, waste material, litter, and other foreign substances.

a. Sweep paved areas broom clean.

b. Remove tools, construction equipment, machinery, and surplus material from

Project site.

C. Comply with safety standards for cleaning. Do not burn waste materials. Do not bury debris or excess materials on FAA's property. Do not discharge volatile, harmful, or dangerous materials into drainage systems. Remove waste materials from Project site and dispose of lawfully.

END OF SECTION 01 77 00

DIVISION 3 – CONCRETE

SECTION 03 30 00 – CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Cast-in-place concrete, including concrete materials, mixture design, placement procedures, and finishes for the support of the handrails.

1.2 INFORMATIONAL SUBMITTALS

A. Design Mixtures: For each concrete mixture, include the following:

1. Mixture identification.

2. Minimum 28-day compressive strength.

3. Maximum w/cm.

4. Slump limit.

5. Air content.

6. Nominal maximum aggregate size.

7. Indicate amounts of mixing water to be withheld for later addition at Project site if permitted.

8. Include manufacturer's certification that permeability-reducing admixture is compatible with mix design.

9. Intended placement method.

B. Contractor shall submit Concrete Delivery Ticket to Contracting Officer Representative (COR) upon delivery.

1.3 QUALITY ASSURANCE

A. Ready-Mixed Concrete Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and that complies with ASTM C94/C94M requirements for production facilities and equipment.

1. Manufacturer certified in accordance with NRMCA's "Certification of Ready Mixed Concrete Production Facilities."

1.4 FIELD CONDITIONS

A. Cold-Weather Placement: Comply with ACI 301and ACI 306.1 and as follows.

1. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.

2. When average high and low temperature is expected to fall below 40 deg F for three successive days, maintain delivered concrete mixture temperature within the temperature range required by ACI 301.

3. Do not use frozen materials or materials containing ice or snow.

4. Do not place concrete in contact with surfaces less than 35 deg F, other than reinforcing steel.

5. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators unless otherwise specified and approved in mixture designs.

B. Hot-Weather Placement: Comply with ACI 301and ACI 305.1, and as follows:

1. Maintain concrete temperature at time of discharge to not exceed 95 deg F.

2. Fog-spray forms, and subgrade just before placing concrete. Keep subgrade uniformly moist without standing water, soft spots, or dry areas.

PART 2 - PRODUCTS

2.1 CONCRETE MATERIALS

A. Source Limitations:

1. Obtain all concrete mixtures from a single ready-mixed concrete manufacturer for entire Project.

2. Obtain each type or class of cementitious material of the same brand from the same manufacturer's plant.

3. Obtain aggregate from single source.

4. Obtain each type of admixture from single source from single manufacturer.

B. Cementitious Materials:

1. Portland Cement: ASTM C150/C150M, Type I

2. Fly Ash: ASTM C618, Class F.

3. Slag Cement: ASTM C989/C989M, Grade 100.

4. Silica Fume: ASTM C1240 amorphous silica.

C. Normal-Weight Aggregates: ASTM C33/C33M, Class 3S coarse aggregate or better, graded.

Provide aggregates from a single source.

1. Maximum Coarse-Aggregate Size: 1 inch nominal.

2. Fine Aggregate: Free of materials with deleterious reactivity to alkali in cement.

D. Air-Entraining Admixture: ASTM C260/C260M.

E. Chemical Admixtures: Certified by manufacturer to be compatible with other admixtures that do not contribute water-soluble chloride ions exceeding those permitted in hardened concrete.

1. Water-Reducing Admixture: ASTM C494/C494M, Type A.

2. Retarding Admixture: ASTM C494/C494M, Type B.

3. Water-Reducing and -Retarding Admixture: ASTM C494/C494M, Type D.

4. High-Range, Water-Reducing Admixture: ASTM C494/C494M, Type F.

5. High-Range, Water-Reducing and -Retarding Admixture: ASTM C494/C494M, Type G.

6. Plasticizing and Retarding Admixture: ASTM C1017/C1017M, Type II.

2.2 CURING MATERIALS

A. Evaporation Retarder: Waterborne, monomolecular film forming, manufactured for application to fresh concrete.

B. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd.when dry.

C. Moisture-Retaining Cover: ASTM C171, polyethylene film burlap-polyethylene sheet.

D. Water: Potable or complying with ASTM C1602/C1602M.

E. Clear, Waterborne, Membrane-Forming, Dissipating Curing Compound: ASTM C309, Type 1, Class B.

F. Clear, Solvent-Borne, Membrane-Forming, Curing and Sealing Compound: ASTM C1315, Type 1, Class A.

2.3 CONCRETE MIXTURES, GENERAL

A. Cementitious Materials: Limit percentage, by weight, of cementitious materials other than portland cement in concrete as follows:

1. Fly Ash or Other Pozzolans: 25 percent by mass.

2. Slag Cement: 50 percent by mass.

3. Silica Fume: 10 percent by mass.

4. Total of Fly Ash or Other Pozzolans and Silica Fume: 35 percent by mass with fly ash or pozzolans not exceeding 25 percent by mass and silica fume not exceeding 10 percent by mass.

B. Admixtures: Use admixtures in accordance with manufacturer's written instructions.

1. Use water-reducing or plasticizing admixture in concrete, as required, for placement and workability.

2. Use water-reducing and -retarding admixture when required by high temperatures, low humidity, or other adverse placement conditions.

3. Use water-reducing admixture in pumped concrete, concrete with a w/cm below 0.50.

2.4 CONCRETE MIXTURES

A. Class A: Normal-weight concrete used for small piers supporting handrails.

1. Exposure Class: ACI 318 F1.

2. Minimum Compressive Strength: 3000 psi at 28 days.

3. Maximum w/cm: 0.50.

4. Slump Limit: 4 inches, plus or minus 1 inch before adding high-range water-reducing admixture or plasticizing admixture at Project site.

5. Air Content:

a. Exposure Class F1: 4.5 percent, plus or minus 1.5 percent at point of delivery for concrete containing 1-inchnominal maximum aggregate size.

6. Limit water-soluble, chloride-ion content in hardened concrete to 0.15 percent by weight of cement.

2.5 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete in accordance with ASTM C94/C94M, and furnish batch ticket information.

B. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete in accordance with ASTM C94/C94M. Mix concrete materials in appropriate drum-type batch machine mixer.

1. For mixer capacity of 1 cu. yd. or smaller, continue mixing at least 1-1/2 minutes, but not more than five minutes after ingredients are in mixer, before any part of batch is released.

2. For mixer capacity larger than 1 cu. yd., increase mixing time by 15 seconds for each additional 1 cu. yd.

3. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mixture type, mixture time, quantity, and amount of water added. Record approximate location of final deposit in structure.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verification of Conditions:

1. Before placing concrete, verify that installation of concrete forms, accessories, and embedded items are complete and that required inspections have been performed.

2. Do not proceed until unsatisfactory conditions have been corrected.

3.2 INSTALLATION OF EMBEDDED ITEMS

A. Place and secure anchorage devices, i.e. pipe sleeves, required for adjoining Work that is attached to or supported by cast-in-place concrete.

B. Follow manufacturer recommended instructions for pipe sleeve installation in concrete.

3.3 CONCRETE PLACEMENT

A. Before placing concrete, verify that installation of formwork, reinforcement, and embedded items are complete and that required inspections are completed.

B. Notify Contracting Officer Representative (COR) 24 hours prior to commencement of concrete placement.

C. Do not add water to concrete during delivery, at Project site, or during placement unless approved by Project Engineer or COR in writing, but not to exceed the amount indicated on the concrete delivery ticket.

1. Do not add water to concrete after adding high-range water-reducing admixtures to mixture.

D. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete is placed on concrete that has hardened enough to cause seams or planes of weakness.

1. Deposit concrete to avoid segregation.

2. Consolidate placed concrete with mechanical vibrating equipment in accordance with

ACI 301.

a. Do not use vibrators to transport concrete inside forms.

b. Insert and withdraw vibrators vertically at uniformly spaced locations to rapidly penetrate placed layer and at least 6 inches into preceding layer.

c. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity.

d. At each insertion, limit duration of vibration to time necessary to consolidate concrete, and complete embedment of reinforcement and other embedded items without causing mixture constituents to segregate.

3.4 FINISHING FORMED SURFACES

A. As-Cast Surface Finishes:

1. ACI 301Surface Finish SF-1.0: As-cast concrete texture imparted by form-facing material.

a. Patch voids larger than 1-1/2 inches wide or 1/2 inch deep.

b. Remove projections larger than 1 inch.

3.5 CONCRETE CURING

A. Protect freshly placed concrete from premature drying and excessive cold or hot temperatures.

1. Comply with ACI 301 and ACI 306.1 for cold weather protection during curing.

2. Comply with ACI 301 and ACI 305.1 for hot-weather protection during curing.

3. Maintain moisture loss no more than 0.2 lb/sq. ft. x h before and during finishing operations.

B. Curing Formed Surfaces: Comply with ACI 308.1as follows:

1. If forms remain during curing period, moist cure after loosening forms.

2. If removing forms before end of curing period, continue curing for remainder of curing period, as follows:

a. Continuous Fogging: Maintain standing water on concrete surface until final setting of concrete.

b. Continuous Sprinkling: Maintain concrete surface continuously wet.

c. Absorptive Cover: Pre-dampen absorptive material before application; apply additional water to absorptive material to maintain concrete surface continuously wet.

d. Water-Retention Sheeting Materials: Cover exposed concrete surfaces with sheeting material, taping, or lapping seams.

e. Membrane-Forming Curing Compound: Apply uniformly in continuous operation by power spray or roller in accordance with manufacturer's written instructions.

1) Recoat areas subject to heavy rainfall within three hours after initial application.

2) Maintain continuity of coating and repair damage during curing period.

3.6 PROTECTION

A. Protect concrete surfaces as follows:

1. Prohibit placement of steel items on concrete surfaces.

2. Prohibit use of acids or acidic detergents over concrete surfaces.

END OF SECTION 033000

DIVISION 4 – MASONRY

SECTION 04 01 40.61 – STONE REPAIR

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Repairing stone masonry.

1.2 SEQUENCING AND SCHEDULING

A. Work Sequence: Perform stone repair work in the following sequence, which includes work specified in this and other Sections:

1. Remove plant growth near stone wall.

2. Inspect masonry for open mortar joints and temporarily point them before cleaning to prevent the intrusion of water and other cleaning materials into the wall.

3. Clean stone.

4. Rake out mortar from joints surrounding stone to be replaced and from joints adjacent to stone repairs along joints.

5. Repair stonework, including replacing existing stone with new stone.

6. Rake out mortar from joints to be repointed.

7. Point mortar and sealant joints.

8. After repairs and repointing have been completed and cured, perform a final cleaning to remove residues from this work.

B. Before performing any work, Contractor shall inspect and submit in writing a plan in which the Contractor intents to execute for the repairing of the wall. The Contractor’s planned process and procedure must be approved by the Engineer and/or Contracting Officer Representative prior to Submittals and execution of the work.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Include construction details and material descriptions.

2. Include recommendations for product application and use and/or manufacturers data sheet.

1.4 INFORMATIONAL SUBMITTALS

A. Qualification Data: For stone repair specialist.

1.5 QUALITY ASSURANCE

A. Stone Repair Specialist Qualifications: Engage an experienced stone repair firm to perform work of this Section. Firm shall have completed work similar in material, design, and extent to that indicated for this Project with a record of successful in-service performance.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver stone units to Project site strapped together in suitable packs or pallets or in heavy-duty crates and protected against impact and chipping.

B. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not use cementitious materials that have become damp.

C. Store hydrated lime in manufacturer's original and unopened containers. Discard lime if containers have been damaged or have been opened for more than two days.

D. Store sand where grading and other required characteristics can be maintained and contamination avoided.

E. Handle stone to prevent overstressing, chipping, defacement, and other damage.

1.7 FIELD CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit stone repair work to be performed according to product manufacturers' written instructions and specified requirements.

B. Temperature Limits, General: Repair stone units only when air temperature is between 40 and 90 deg Fand is predicted to remain so for at least seven days after completion of the Work.

C. For manufactured repair materials, perform work within the environmental limits set by each manufacturer.

PART 2 - PRODUCTS

2.1 STONE MATERIALS

A. Stone Matching Existing: Natural building stone of variety, color, texture, grain, veining, finish, size, and shape that match existing stone and with physical properties as listed below:

1. Limestone and/or Sandstone are the natural producing stones at El Paso, TX.

2. For existing stone that exhibits a range of colors, texture, grain, veining, finishes, sizes, or shapes, provide stone that proportionally matches that range rather than stone that matches an individual color, texture, grain, veining, finish, size, or shape within that range.

B. Cutting New Stone: Cut each new stone so that, when it is set in final position, the rift or natural bedding planes will match the rift orientation of existing stones.

2.2 MORTAR MATERIALS

A. Mortar Cement: ASTM C1329/C1329M. Type M.

2.3 ACCESSORY MATERIALS

A. Stone Repair Anchors and Pins: Mechanical fasteners and pins of Type 316 stainless steel;

designed for stone stabilization and pinning stone pieces.

B. Antirust Coating: Fast-curing, lead- and chromate-free, self-curing, universal modified-alkyd primer according to MPI #23 (surface-tolerant, anticorrosive metal primer) .

2.4 MORTAR MIXES

A. Measurement and Mixing: Measure cementitious materials and sand in a dry condition by volume or equivalent weight. Do not measure by shovel; use known measure. Mix materials in a clean, mechanical batch mixer.

B. Do not use admixtures in mortar unless specified in the manufacturer instructions.

PART 3 - EXECUTION

3.1 PROTECTION

A. Prevent mortar from staining face of surrounding stone and other surfaces.

1. Immediately remove mortar splatters in contact with exposed stone and other surfaces.

3.2 STONE REPAIR, GENERAL

A. Appearance Standard: Repaired surfaces are to have a uniform appearance as viewed from 15 feet away by Contracting Officer Representative (COR).

3.3 ABANDONED ANCHOR REMOVAL

A. Remove abandoned anchors, brackets, wood nailers, and other extraneous items no longer in use, if any.

1. Remove items carefully to avoid spalling or cracking stone.

2. Notify COR before proceeding if an item cannot be removed without damaging surrounding stone. Do the following where directed:

a. Cut or grind off item approximately 3/4 inch beneath surface and core drill a recess of same depth in surrounding stone as close around item as practical.

b. Immediately paint exposed end of item with two coats of antirust coating, following coating manufacturer's written instructions and without exceeding manufacturer's recommended dry film thickness per coat. Keep paint off sides of recess.

3. Plug hole where each item was removed unless directed to remove and replace stone unit.

3.4 STONE REMOVAL AND REPLACEMENT

A. Remove stone that has deteriorated or is damaged beyond repair. Carefully remove entire units from joint to joint, without damaging surrounding stone, in a manner that permits replacement with full-size units.

B. Support and protect remaining stonework that surrounds removal area as necessary

C. Notify COR of unforeseen detrimental conditions including voids, cracks, bulges, and loose units in existing stone.

D. Remove in an undamaged condition as many whole stone units as possible.

1. Remove mortar, loose particles, and soil from stone by cleaning with hand chisels, brushes, and water.

2. Remove sealants by cutting close to stone with utility knife and cleaning with solvents.

3. Store stone for reuse. Store off ground, on skids, and protected from weather.

E. Clean stone surrounding removal areas by removing mortar, dust, and loose particles in preparation for stone replacement.

F. Replace removed damaged stone with other removed stone in good condition, where possible, or with new stone matching existing stone, including direction of rift or natural bedding planes.

Do not use broken units unless they can be cut to usable size.

G. Install replacement stone into bonding and coursing pattern of existing stone. If cutting is required, use a motor-driven saw designed to cut stone with clean, sharp, unchipped edges.

Finish edges to blend with appearance of edges of existing stone.

1. Use setting buttons or shims to set stone accurately spaced with uniform joints.

H. Set replacement stone with rebuilding (setting) mortar and with completely filled bed, head, and collar joints. Butter vertical joints for full width before setting, and set units in full bed of mortar unless otherwise indicated. Add new anchors if necessary.

1. Tool exposed mortar joints in repaired areas to match joints of surrounding existing stonework.

2. When mortar is hard enough to support units, remove shims and other devices interfering with pointing of joints.

I. Curing: Cure mortar by maintaining in thoroughly damp condition for at least 72 consecutive hours, including weekends and holidays.

3.5 DURING THE WORK

A. Notify COR if steel is exposed during stone removal. Where COR determines that steel is structural, or for other reasons cannot be totally removed, prepare and paint it as follows:

1. Surface Preparation: Remove paint, rust, and other contaminants as applicable to comply with paint manufacturer's recommended preparation.

2. Antirust Coating: Immediately paint exposed steel with two coats of antirust coating, following coating manufacturer's written instructions and without exceeding manufacturer's recommended rate of application (dry film thickness per coat).

3.6 CRACK INJECTION

A. General: Comply with cementitious crack-filler manufacturer's written instructions.

B. Drill 1/4-inch diameter injection holes as follows:

1. Transverse Cracks Less Than 3/8 inch Wide: Drill holes through center of crack at 12 to

18 incheso.c.

2. Transverse Cracks More Than 3/8 inchWide: Drill holes through center of crack at 18 to

36 inches o.c.

3. Delaminations: Drill holes at approximately 18 inches o.c. both vertically and horizontally.

4. Drill holes 2 inches deep.

C. Clean out drill holes and cracks with compressed air and water. Remove dirt and organic matter, loose material, sealants, and failed crack repair materials.

D. Place plastic injection ports in drilled holes and seal face of cracks between injection ports with clay or other nonstaining, removable plugging material. Leave openings at upper ends of cracks for air release.

E. Inject cementitious crack filler through ports sequentially, beginning at one end of area and working to opposite end; where possible, begin at lower end of injection area and work upward.

Inject filler until it extrudes from adjacent ports. After port has been injected, plug with clay or other suitable material and begin injecting filler at adjacent port, repeating process until all ports have been injected.

F. Clean cementitious crack filler from face of stone before it sets by scrubbing with water.

G. After cementitious crack filler has set, remove injection ports, plugging material, and excess filler. Patch injection holes and surface of cracks as specified in "Stone Patching" Article.

3.7 STONE PATCHING

A. Patch the following stone units:

1. Units with holes.

2. Units with chipped edges or corners. Patch chipped edges or corners measuring more than 3/4 inch in least dimension.

3. Units with small areas of deep deterioration. Patch deep deteriorations measuring more than 3/4 inch in least dimension and more than 1/4 inch deep.

B. Remove deteriorated material and remove adjacent material that has begun to deteriorate.

Carefully remove additional material so patch does not have feathered edges and is at least 1/4 inch thick, but not less than recommended in writing by patching compound manufacturer.

C. Mask adjacent mortar joint or rake out for repointing if patch extends to edge of stone unit.

D. Brush-coat stone surfaces with slurry coat of patching compound according to manufacturer's written instructions.

E. Place patching compound in layers as recommended in writing by patching compound manufacturer, but not less than 1/4 inch or more than 2 inches thick. Roughen surface of each layer to provide a key for next layer.

F. Keep each layer damp for 72 hours or until patching compound has set.

G. Remove and replace patches with hairline cracks or that show separation from stone at edges, and those that do not match adjoining stone in color or texture.

3.8 FINAL CLEANING

A. After mortar has fully hardened, thoroughly clean exposed stone surfaces of excess mortar and foreign matter; use wood scrapers, stiff-nylon or -fiber brushes, and clean water, applied by low-pressure spray.

1. Do not use metal scrapers or brushes.

2. Do not use acidic or alkaline cleaners.

3.9 STONE WASTE DISPOSAL

A. Salvageable Materials: Unless otherwise indicated, excess stone materials are Contractor's property.

B. Stone Waste: Remove stone waste and legally dispose of off Owner's property.

END OF SECTION 04 01 40.61

DIVISION 5 – METALS

SECTION 05 52 13 – TUBE RAILINGS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Aluminum handrails.

1.2 STANDARDS

A. Handrail system must meet criteria provided in OSHA 29 CFR 1910.29 Fall Protection Systems and Falling Object Protection-Criteria and Practices and 29 CFR 1926.502, Fall Protection Systems Criteria and Practices.

1.3 ACTION SUBMITTALS

A. Shop Drawings: Include plans, elevations, sections, and details.

1.4 INFORMATIONAL SUBMITTALS

A. Product Test Reports: For tests on railings performed by a qualified testing agency, in accordance with ASTM E894 and ASTM E935.

1.5 QUALITY ASSURANCE

A. Welding Qualifications: Qualify procedures and personnel in accordance with the following:

1. AWS D1.2/D1.2M, "Structural Welding Code - Aluminum."

1.6 FIELD CONDITIONS

A. Field Measurements: Verify actual locations, length and slope of construction contiguous with railings by field measurements before fabrication.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Structural Performance: Railings shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

1. Top Rails:

a. Force 200 lb applied in a downward or outward direction.

b. When the 200 lb test load is applied in downward direction, the top rail of the guardrail system must not deflect to a height of less than 39 inches above the walking surface.

2. Midrails and Intermediate Vertical Members:

a. Force of at least 150 lb applied in a downward or outward direction at any point along the intermediate member.

2.2 METALS, GENERAL

A. Metal Surfaces, General: Provide materials with smooth surfaces, without seam marks, roller marks, rolled trade names, stains, discolorations, or blemishes.

B. Brackets, Flanges, and Anchors: Cast or formed metal of same type of material and finish as supported rails unless otherwise indicated.

2.3 ALUMINUM RAILINGS

A. Source Limitations: Obtain each type of railing from single source from single manufacturer.

B. Aluminum, General: Provide alloy and temper recommended by aluminum producer and finisher for type of use and finish indicated, and with not less than the strength and durability properties of alloy and temper designated below for each aluminum form required.

C. Extruded Structural Round Tubing: ASTM B429/B429M, Alloy 6063-T6.

1. Provide Standard Weight (Schedule 40) pipe.

2. Nominal Size: 2 in. O.D.

2.4 FASTENERS

A. Fastener Materials:

1. Aluminum Railing Components: Type 316 stainless steel fasteners.

2.5 MISCELLANEOUS MATERIALS

A. Welding Rods and Bare Electrodes: Select in accordance with AWS specifications for metal alloy welded.

1. For aluminum railings, provide type and alloy as recommended by producer of metal to be welded and as required for color match, strength, and compatibility in fabricated items.

2.6 FABRICATION

A. General: Fabricate railings to comply with requirements indicated for design, dimensions, member sizes and spacing, details, finish, and anchorage, but not less than that required to support structural loads.

B. Shop assemble railings to greatest extent possible to minimize field splicing and assembly.

Disassemble units only as necessary for shipping and handling limitations.

1. Clearly mark units for reassembly and coordinated installation.

2. Use connections that maintain structural value of joined pieces.

C. Cut, drill, and punch metals cleanly and accurately.

1. Remove burrs and ease edges to a radius of approximately 1/32 inch unless otherwise indicated.

2. Remove sharp or rough areas on exposed surfaces.

D. Form work true to line and level with accurate angles and surfaces.

E. Fabricate connections that are exposed to weather in a manner that excludes water.

1. Provide weep holes where water may accumulate.

2. Locate weep holes in inconspicuous locations.

F. Connections: Fabricate railings with welded connections.

G. Welded Connections: Cope components at connections to provide close fit, or use fittings designed for this purpose. Weld all around at connections, including at fittings.

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove flux immediately.

4. At exposed connections, finish exposed welds to comply with NOMMA's "Voluntary

Joint Finish Standards" for Finish #3 welds; utilitarian appearance not subject to view, partially dressed weld with spatter removed.

H. Form changes in direction as follows:

1. By bending or by inserting prefabricated elbow fittings.

I. Bend members in jigs to produce uniform curvature for each configuration required. Maintain cross section of member throughout entire bend without buckling, twisting, cracking, or otherwise deforming exposed surfaces of components.

J. Close exposed ends of hollow railing members with prefabricated cap and end fittings of same metal and finish as railings.

K. For railing posts set in concrete, provide stainless steel sleeves not less than 6 inches long with inside dimensions not less than 1/2 inch greater than outside dimensions of post, with metal plate forming bottom closure.

2.7 ALUMINUM FINISHES

A. Mill Finish: AA-M12, nonspecular as fabricated.

PART 3 - EXECUTION

3.1 CONCRETE PIERS

A. Concrete piers for handrail posts shall be 2 ft deep, 8in. in diameter. See Section 03 30 00, Cast- In-Place Concrete.

B. Piers and vertical posts shall be spaced no more than 8 ft O.C.

3.2 INSTALLATION, GENERAL

A. The System must include a top rail and mid-rail. The top rails shall be 42 inches above walking surface, and with a maximum opening of 19 inches between mid-rails associated with the railing system. See Figure below.

Figure 3.1.A - Handrail Requirements

B. Perform cutting, drilling, and fitting required for installing railings.

≤ 19”

≤ 19”

42”

1. Set posts plumb within a tolerance of 1/16 inch in 3 feet.

2. Align rails so variations from level for horizontal members and variations from parallel with rake of steps and ramps for sloping members do not exceed 1/4 inch in 12 feet.

C. Control of Corrosion: Prevent galvanic action and other forms of corrosion by insulating metals and other materials from direct contact with incompatible materials.

1. Coat concealed surfaces of aluminum that will be in contact with grout, concrete, or dissimilar metals, with a heavy coat of bituminous paint.

D. Adjust railings before anchoring to ensure matching alignment at abutting joints.

E. Fastening to In-Place Construction: Use anchorage devices and fasteners where necessary for securing railings and for properly transferring loads to in-place construction.

3.3 RAILING CONNECTIONS

A. Welded Connections: Use fully welded joints for permanently connecting railing components.

Comply with requirements for welded connections in "Fabrication" Article, whether welding is performed in the shop or in the field.

B. All construction shall be fabricated and assembled with smooth connections two minimize interference of hand injury when sliding along top rail surface.

C. Expansion Joints: Install expansion joints at locations indicated but not farther apart than required to accommodate thermal movement. Provide slip-joint internal sleeve, extending 2 inches beyond joint on either side; fasten internal sleeve securely to one side; and locate joint within 6 inches of post.

1. For continuous spans in excess of 30 ft, expansion joints must be provided.

3.4 ANCHORING POSTS

A. Use stainless steel pipe sleeves preset and anchored into concrete for installing posts. After posts are inserted into sleeves, fill annular space between post and sleeve with nonshrink, nonmetallic grout, mixed and placed to comply with anchoring material manufacturer's written instructions.

B. Cover anchorage joint with flange of same metal as post, welded to post after placing anchoring material.

C. Anchor posts to metal surfaces with flanges, angle type, or floor type, as required by conditions, connected to posts and to metal supporting members as follows:

1. For aluminum railings, attach posts as indicated, using fittings designed and engineered for this purpose.

3.5 CLEANING

A. Clean aluminum by washing thoroughly with clean water and soap and rinsing with clean water.

3.6 PROTECTION

A. Protect finishes of railings from damage during construction period with temporary protective coverings approved by railing manufacturer. Remove protective coverings at time of Substantial Completion.

B. Restore finishes damaged during installation and construction period, so no evidence remains of correction work. Return items that cannot be refinished in the field to the shop; make required alterations and refinish entire unit or provide new units.

END OF SECTION 055213

DIVISION 31 – EARTHWORK

SECTION 31 20 00 – SITE CLEARING AND EARTH MOVING

PART 1 – GENERAL

1.1 Section Includes:

1. Removal of existing sidewalk

2. Preparing subgrades for walks.

3. Subbase course for concrete walks

1.2 SUBMITTALS

A. Product Data: For each type of the following manufactured products required:

1. Geotextiles.

1.3 PROJECT CONDITIONS

A. Do not commence site clearing operations until temporary erosion- and sedimentation-control measures are in place.

1.4 MATERIAL

A. Cleared materials shall become Contractor's property and shall be removed from Project site.

1.5 SIDEWALK REMOVAL

A. This work shall consist of the complete removal of the existing sidewalk as shown on the plans.

B. Sidewalk removal shall include portland cement and stabilized subbase.

1.6 REMOVAL REQUIREMENTS

A. When portions of existing pavement are to remain in place, provisions shall be made for satis-factory transitions between replacements and the portions remaining in place.

B. A full depth, perpendicular, straight joint shall be sawn at the ends and all edges of portions to be removed. Any damage done to the existing sidewalk or appurtenance to remain in place shall be repaired or removed and replaced as directed by the Engineer.

PART 2 – PRODUCTS

2.1 SOIL MATERIALS

A. Subbase Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 90 percent passing a 1-1/2-inch sieve and not more than 12 percent passing a No. 200 sieve.

2.2 GEOTEXTILES

A. Separation Geotextile: Woven geotextile fabric, manufactured for separation applications, made from polyolefins or polyesters; with elongation less than 50 percent; complying with AASHTO M 288 and the following, measured per test methods referenced:

1. Survivability: Class 2; AASHTO M 288.

2. Grab Tensile Strength: 247 lbf; ASTM D 4632.

3. Sewn Seam Strength: 222 lbf; ASTM D 4632.

4. Tear Strength: 90 lbf; ASTM D 4533.

5. Puncture Strength: 90 lbf; ASTM D 4833.

6. Apparent Opening Size: No. 60 sieve, maximum; ASTM D 4751.

7. Permittivity: 0.02 per second, minimum; ASTM D 4491.

8. UV Stability: 50 percent after 500 hours' exposure; ASTM D 4355.

PART 3 - EXECUTION

3.1 TEMPORARY EROSION AND SEDIMENTATION CONTROL

A. Provide temporary erosion- and sedimentation-control measures to prevent soil erosion and discharge of soil-bearing water runoff or airborne dust to storm drain inlet.

B. Inspect, maintain, and repair erosion- and sedimentation-control measures during construction.

C. Remove erosion and sedimentation controls and restore and stabilize areas disturbed during construction.

3.2 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth moving operations.

B. Protect and maintain erosion and sedimentation controls during earth moving operations.

C. Protect subgrades and foundation soils from freezing temperatures and frost. Remove temporary protection before placing subsequent materials.

3.3 DEWATERING

A. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

B. Protect subgrades from softening, undermining, washout, and damage by rain or water accumulation.

1. Reroute surface water runoff away from excavated areas. Do not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches.

3.4 EXCAVATION, GENERAL

A. Unclassified Excavation: Excavate to subgrade elevations regardless of the character of surface and subsurface conditions encountered. Unclassified excavated materials may include rock, soil materials, and obstructions. No changes in the Contract Sum or the Contract Time will be authorized for rock excavation or removal of obstructions.

3.5 SUBGRADE INSPECTION

A. Notify COTR when excavations have reached required subgrade.

B. If COTR determines that unsatisfactory soil is present, continue excavation and replace with compacted backfill or fill material as directed.

C. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or construction activities, as directed by COTR, without additional compensation.

3.6 SOIL MOISTURE CONTROL

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill soil layer before compaction to within 2 percent of optimum moisture content.

1. Do not place backfill or fill soil material on surfaces that are muddy, frozen, or contain frost or ice.

2. Remove and replace, or scarify and air dry, otherwise satisfactory soil material that exceeds optimum moisture content by 2 percent and is too wet to compact to specified dry unit weight.

3.7 GRADING

A. General: Uniformly grade areas to a smooth surface, free of irregular surface changes. Comply with compaction requirements and grade to cross sections, lines, and elevations indicated.

1. Provide a smooth transition between adjacent existing grades and new grades.

2. Cut out soft spots, fill low spots, and trim high spots to comply with required surface tolerances.

B. Site Rough Grading: Slope grades to direct water away from buildings and to prevent ponding.

Finish subgrades to required elevations within the following tolerances:

3.8 GEOTEXTILE INSTALLATION

A. Place geotextile on compacted, smooth, and leveled subgrade. Fabric shall be cut to fit width of road. The fabric shall be rolled out directly upon the prepared surface and shall not be dragged over any surface. Fabric in place shall have a smooth surface and shall be free of folds, wrinkles, cuts, or other imperfections.

B. Individual panels of fabric shall be overlapped at least 12 inches, with the preceding layer overlapping the following layer in the direction that surfacing material will be spread.

3.9 SUBBASE UNDER WALKS

A. Place subbase course on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place subbase course under walks as follows:

1. Install separation geotextile on prepared subgrade according to manufacturer's written instructions, overlapping sides and ends.

2. Place subbase material over subgrade under concrete pavement.

3.10 PROTECTION

A. Protecting Graded Areas: Protect newly graded areas from traffic, freezing, and erosion. Keep free of trash and debris.

B. Repair and reestablish grades to specified tolerances where completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions.

1. Scarify or remove and replace soil material to depth as directed by COTR; reshape and recompact.

3.11 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Remove surplus soil material, unsuitable topsoil, obstructions, demolished materials, and waste materials including trash and debris, and legally dispose of them off FAA's property.

END OF SECTION 31 20 00

DIVISION 32 – EXTERIOR IMPROVEMENTS

SECTION 32 13 13 - CONCRETE PAVING

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes exterior concrete pavement for walkways.

1.2 SUBMITTALS

A. Product Data: For each type of manufactured…