B08_Attachment_2_Piedras_Blancas_LH_Painting_Specifications_20240613.pdf

U.S. BUREAU OF LAND MANAGEMENT

PIEDRAS BLANCAS LIGHT STATION

California Coastal National Monument San Simeon, California

Final Construction Documents Project Specifications

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

JUNE 2024

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HISTORIC TREATMENT PROCEDURES 013591 - 1

SECTION 013591 - HISTORIC TREATMENT PROCEDURES

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes general protection and treatment procedures for designated historic spaces, areas, rooms, and surfaces in Project.

1.2 DEFINITIONS

A. Consolidate: To strengthen loose or deteriorated materials in place.

B. Design Reference Sample: A sample that represents Government's prebid selection of work to be matched; it may be existing work or work specially produced for Project.

C. Dismantle: To disassemble or detach a historic item from a surface, or a nonhistoric item from a historic surface, using gentle methods and equipment to prevent damage to historic items and surfaces; disposing of items unless indicated to be salvaged or reinstalled.

D. Historic: Spaces, areas, rooms, surfaces, materials, finishes, and overall appearance that are important to the successful rehabilitation as determined by Government.

Designated historic surfaces are indicated on Drawings.

E. Match: To blend with adjacent construction and manifest no apparent difference in material type, species, cut, form, detail, color, grain, texture, or finish; as approved by Government.

F. Refinish: To remove existing finishes to base material and apply new finish to match original, or as otherwise indicated.

G. Reinstall: To protect removed or dismantled item, repair and clean it as indicated for reuse, and reinstall it in original position, or where indicated.

H. Remove: To take down or detach a nonhistoric item located within a historic space, area, or room, using methods and equipment to prevent damage to historic items and surfaces; disposing of items unless indicated to be salvaged or reinstalled.

I. Repair: To correct damage and defects, retaining existing materials, features, and finishes while employing as little new material as possible. This includes patching, piecing-in, splicing, consolidating, or otherwise reinforcing or upgrading materials.

J. Replace: To remove, duplicate, and reinstall entire item with new material. The original item is the pattern for creating duplicates unless otherwise indicated.

K. Replicate: To reproduce in exact detail, materials, and finish unless otherwise indicated.

HISTORIC TREATMENT PROCEDURES 013591 - 2

L. Reproduce: To fabricate a new item, accurate in detail to the original, and from either the same or a similar material as the original, unless otherwise indicated.

M. Restore: To consolidate, replicate, reproduce, repair, and refinish as required to achieve the indicated results.

N. Retain: To keep an element or detail secure and intact.

O. Reversible: New construction work, treatments, or processes that can be removed or undone in the future without damaging historic materials unless otherwise indicated.

P. Salvage: To protect removed or dismantled items and deliver them to Government.

Q. Stabilize: To provide structural reinforcement of unsafe or deteriorated items while maintaining the essential form as it exists at present; also, to reestablish a weather-resistant enclosure.

R. Strip: To remove existing finish down to base material unless otherwise indicated.

1.3 PROJECT MEETINGS FOR HISTORIC TREATMENT

A. Preliminary Historic Treatment Conference: Before starting historic treatment work, conduct conference at Project site.

1. Attendees: In addition to representatives of the Government and Contractor, installers whose work interfaces with or affects historic treatment shall be represented at the meeting.

2. Agenda: Discuss items of significance that could affect progress of historic treatment work, including review of the following:

a. Fire-prevention plan.

b. Governing regulations.

c. Areas where existing construction is to remain and the required protection.

d. Hauling routes.

e. Sequence of historic treatment work operations.

f. Storage, protection, and accounting for salvaged and specially fabricated items.

g. Existing conditions, staging, and structural loading limitations of areas where materials are stored.

3. Reporting: Record conference results and distribute copies to everyone in attendance and to others affected by decisions or actions resulting from conference.

B. Coordination Meetings: Conduct specifically for historic treatment work at intervals appropriate to the construction schedule as agreed upon with the Government.

Coordination meetings are in addition to specific meetings held for other purposes, such as progress meetings and preinstallation conferences.

HISTORIC TREATMENT PROCEDURES 013591 - 3

1. Agenda: Review and correct or approve minutes of previous coordination meeting. Review other items of significance that could affect progress of historic treatment work. Include topics for discussion as appropriate to status of Project.

2. Reporting: Record meeting results and distribute copies to everyone in attendance and to others affected by decisions or actions resulting from each meeting.

1.4 MATERIALS OWNERSHIP

A. Historic items, relics, and similar objects including, but not limited to, cornerstones and their contents, commemorative plaques and tablets, antiques, and other items of interest or value to Government that may be encountered or uncovered during the Work, regardless of whether they were previously documented, remain Government property.

1.5 INFORMATIONAL SUBMITTALS

A. Historic Treatment Program: Submit 30 days before work begins.

B. Fire-Prevention Plan: Submit 30 days before work begins.

1.6 QUALITY ASSURANCE

A. Historic Treatment Specialist Qualifications: An experienced firm regularly engaged in historic treatments similar in nature, materials, design, and extent to the work as specified in each Section and that has completed a minimum of five recent projects with a record of successful in-service performance that demonstrates the firm's qualifications to perform this work.

1. Field Supervisor Qualifications: Full-time supervisors experienced in historic treatment work similar in nature, material, design, and extent to that indicated for this Project. Supervisors shall be on site when historic treatment work begins and during its progress. Supervisors shall not be changed during Project except for causes beyond control of the specialist firm.

B. Title X Requirement: Each firm conducting activities that disturb painted surfaces shall be a "Lead-Safe Certified Firm" according to 40 CFR 745, Subpart E, and use only workers that are trained in lead-safe work practices.

C. Historic Treatment Program: Prepare a written plan for historic treatment for whole Project, including each phase or process and protection of surrounding materials during operations. Describe in detail the materials, methods, and equipment to be used for each phase of work. Show compliance with indicated methods and procedures specified in this and other Sections. Coordinate this whole-Project historic treatment program with specific requirements of programs required in other historic treatment Sections.

HISTORIC TREATMENT PROCEDURES 013591 - 4

1. Dust and Noise Control: Include locations of proposed temporary dust- and noise-control partitions and means of egress from occupied areas coordinated with continuing on-site operations and other known work in progress.

2. Debris Hauling: Include plans clearly marked to show debris hauling routes, turning radii, and locations and details of temporary protective barriers.

D. Safety and Health Standard: ANSI/ASSP A10.6.

1.7 STORAGE AND HANDLING OF HISTORIC MATERIALS

A. Historic Materials for Reinstallation:

1. Repair and clean historic items for reuse as indicated.

2. Pack or crate items after cleaning and repairing; cushion against damage during handling. Label contents of containers.

3. Protect items from damage during transport and storage.

4. Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment unless otherwise indicated. Provide connections, supports, and miscellaneous materials to make items functional for use indicated.

B. Existing Historic Materials to Remain: Protect construction indicated to remain against damage and soiling from construction work. Where permitted by Government, items may be dismantled and taken to a suitable, protected storage location during construction work and reinstalled in their original locations after historic treatment and construction work in the vicinity is complete.

C. Storage: Store historic items within a weathertight enclosure where they are protected from moisture, weather, condensation, and freezing temperatures.

1. Secure stored materials to protect from theft.

2. Control humidity so that it does not exceed 85 percent. Maintain temperatures 5 deg F or more above the dew point.

PART 2 - PRODUCTS - (Not Used)

PART 3 - EXECUTION

3.1 PROTECTION

A. Protect persons, motor vehicles, surrounding surfaces of building, building site, plants, and surrounding buildings from harm resulting from historic treatment procedures.

1. Use only proven protection methods, appropriate to each area and surface being protected.

2. Provide temporary barricades, barriers, and directional signage to exclude the public from areas where historic treatment work is being performed.

3. Erect temporary barriers to form and maintain fire-egress routes.

HISTORIC TREATMENT PROCEDURES 013591 - 5

4. Erect temporary protective covers over walkways and at points of pedestrian and vehicular entrance and exit that must remain in service during historic treatment work.

5. Contain dust and debris generated by historic treatment work, and prevent it from reaching the public or adjacent surfaces.

6. Provide shoring, bracing, and supports as necessary. Do not overload structural elements.

7. Protect floors and other surfaces along hauling routes from damage, wear, and staining.

B. Temporary Protection of Historic Materials:

1. Protect existing historic materials with temporary protections and construction.

Do not remove existing materials unless otherwise indicated.

2. Do not attach temporary protection to historic surfaces except as indicated as part of the historic treatment program and approved by Government.

C. Comply with each product manufacturer's written instructions for protections and precautions. Protect against adverse effects of products and procedures on people and adjacent materials, components, and vegetation.

3.2 PROTECTION DURING APPLICATION OF CHEMICALS

A. Protect surrounding surfaces of building being restored, building site, plants, and surrounding buildings from harm or spillage resulting from applications of chemicals and adhesives.

B. Cover adjacent surfaces with protective materials that are proven to resist chemicals selected for Project unless chemicals being used will not damage adjacent surfaces as indicated in historic treatment program. Use covering materials and masking agents that are waterproof and UV resistant and that will not stain or leave residue on surfaces to which they are applied. Apply protective materials according to manufacturer's written instructions. Do not apply liquid masking agents or adhesives to painted or porous surfaces. When no longer needed, promptly remove protective materials.

C. Do not apply chemicals during winds of sufficient force to spread them to unprotected surfaces.

D. Neutralize alkaline and acid wastes and legally dispose of off Government property.

E. Collect and dispose of runoff from chemical operations by legal means and in a manner that prevents soil contamination, soil erosion, undermining of paving and foundations, damage to landscaping, or water penetration into building interior.

3.3 GENERAL HISTORIC TREATMENT

A. Have historic treatment work performed only by qualified historic treatment specialists.

HISTORIC TREATMENT PROCEDURES 013591 - 6

B. Ensure that supervisory personnel are present when historic treatment work begins and during its progress.

C. Record existing work before each procedure (preconstruction), and record progress during the work. Use digital preconstruction documentation photographs or video recordings. Comply with requirements in Section 013233 "Photographic Documentation."

D. Perform regular inspections of Project site as the Work progresses to detect hazards resulting from historic treatment procedures.

E. Follow the procedures in subparagraphs below and procedures approved in historic treatment program unless otherwise indicated:

1. Retain as much existing material as possible; repair and consolidate rather than replace.

2. Use additional material or structure to reinforce, strengthen, prop, tie, and support existing material or structure.

3. Use reversible processes wherever possible.

4. Use historically accurate repair and replacement materials and techniques unless otherwise indicated.

5. Record existing work before each procedure (preconstruction) and progress during the work with digital preconstruction documentation photographs or video recordings. Comply with requirements in Section 013233 "Photographic Documentation."

F. Notify Government of visible changes in the integrity of material or components whether from environmental causes including biological attack, UV degradation, freezing, or thawing or from structural defects including cracks, movement, or distortion.

1. Do not proceed with the work in question until directed by Government.

G. Where missing features are indicated to be repaired or replaced, provide work with appearance based on accurate duplications rather than on conjecture, subject to approval of Government.

H. Where work requires existing features to be removed or dismantled and reinstalled, perform these operations without damage to the material itself, to adjacent materials, or to the substrate.

I. Identify new and replacement materials and features with permanent marks hidden in the completed Work to distinguish them from original materials. Record a legend of identification marks and the locations of the items on record Drawings.

END OF SECTION 013591

HISTORIC REMOVAL AND DISMANTLING 024296 - 1

SECTION 024296 - HISTORIC REMOVAL AND DISMANTLING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Historic treatment procedures for removal and dismantling work for designated historic spaces, areas, rooms, and surfaces and the following specific work:

a. Removal and dismantling of indicated portions of building or structure and debris hauling.

b. Removal and dismantling of indicated site elements and debris hauling.

c. Salvage of existing items to be reused or recycled.

B. Related Requirements:

1. Section 013591 "Historic Treatment Procedures" for general historic treatment requirements.

2. Section 050371 “Historic Decorative Metal Cleaning” for general cleaning requirements.

3. Section 050383 “Historic Cast Iron Repair” for general repair requirements.

1.2 DEFINITIONS

A. Dismantle: To disassemble or detach a historic item from a surface, or a nonhistoric item from a historic surface, using gentle methods and equipment to prevent damage to historic items and surfaces; disposing of items unless indicated to be salvaged or reinstalled.

B. Existing to Remain: Existing items that are not to be removed or dismantled, except to the degree indicated for performing required Work.

C. Remove: To take down or detach a nonhistoric item located within a historic space, area, or room, using methods and equipment to prevent damage to historic items and surfaces; disposing of items unless indicated to be salvaged or reinstalled.

D. Retain: To keep an element or detail secure and intact.

E. Salvage: To protect removed or dismantled items and deliver them to Government.

1.3 PRECONSTRUCTION MEETINGS

A. Preconstruction Conference(s): Conduct conference(s) at Project site.

HISTORIC REMOVAL AND DISMANTLING 024296 - 2

1. Review minutes of Preliminary Historic Treatment Conference that pertain to removal and dismantling procedures and protection of historic areas and surfaces.

2. Review list of items indicated to be salvaged.

3. Review methods and procedures related to removal and dismantling work.

1.4 INFORMATIONAL SUBMITTALS

A. Qualification Statements: For historic removal and dismantling specialist.

B. Preconstruction Documentation: Show preexisting conditions of adjoining construction and site improvements, including finish surfaces, that might be misconstrued as damage caused by Contractor's removal and dismantling operations.

C. Removal and Dismantling Historic Treatment Program: Submit 30 days before work begins.

D. List of Items Indicated To Be Salvaged: Prepare a list of items indicated on Drawings to be salvaged for Government use or for reinstallation. Submit 15 days before preconstruction conference.

E. Inventory of Salvaged Items: After removal or dismantling Work is complete, submit a list of items that have been salvaged.

1.5 QUALITY ASSURANCE

A. Historic Removal and Dismantling Specialist Qualifications: A qualified historic treatment specialist. General selective demolition experience is insufficient experience for historic removal and dismantling work.

B. Removal and Dismantling Historic Treatment Program: Prepare a written, detailed description of materials, methods, equipment, and sequence of operations to be used for each phase of removal and dismantling work, including protection of surrounding and substrate materials and Project site.

C. Regulatory Requirements: Comply with notification regulations of authorities having jurisdiction before beginning removal and dismantling work. Comply with hauling and disposal regulations of authorities having jurisdiction.

1.6 FIELD CONDITIONS

A. Notify Government of discrepancies between existing conditions and Drawings before proceeding with removal and dismantling work.

B. Hazardous Materials:

1. Hazardous materials are present in construction affected by removal and dismantling work. A report on the presence of hazardous materials is on file for

HISTORIC REMOVAL AND DISMANTLING 024296 - 3

review and use. Examine report to become aware of locations where hazardous materials are present.

a. Hazardous material remediation is specified in Section 028333 “Lead Paint Removal and Disposal.”

b. Do not disturb hazardous materials or items suspected of containing hazardous materials, except under procedures specified in Section 028333 “Lead Paint Removal and Disposal.”

c. If unanticipated asbestos is suspected, stop work in the area of potential hazard, shut off fans and other air handlers ventilating the area, and rope off area until the questionable material is identified. Resume work in the area of concern after safe working conditions are verified.

C. Storage or sale of removed or dismantled items on-site is not permitted unless otherwise indicated.

PART 2 - PRODUCTS - (Not Used)

PART 3 - EXECUTION

3.1 EXAMINATION

A. Preparation for Removal and Dismantling: Examine construction to be removed or dismantled to determine best methods to safely and effectively perform removal and dismantling work.

1. Inventory and record the condition of items to be removed and dismantled for reinstallation or salvage. Enter this information on the inventory of salvaged items.

2. Engineering Survey: Engage a professional engineer to survey condition of building to determine whether removing any element might result in structural deficiency or unplanned collapse of any portion of structure or adjacent structures as a result of removal and dismantling Work.

B. Survey of Existing Conditions: Record existing conditions by use of preconstruction photographs and preconstruction video recordings.

1. Comply with requirements specified in Section 013233 "Photographic Documentation."

C. Perform surveys as the Work progresses to detect hazards resulting from historic removal and dismantling procedures.

3.2 HISTORIC REMOVAL AND DISMANTLING

A. General: Have removal and dismantling work performed by a qualified historic removal and dismantling specialist.

HISTORIC REMOVAL AND DISMANTLING 024296 - 4

B. Comply with requirements in Section 013591 "Historic Treatment Procedures" for identifying and storing historic items.

C. Perform work according to the historic treatment program.

D. Water-Mist Sprinkling: Use water-mist sprinkling and other wet methods to control dust only with adequate, approved procedures and equipment according to the historic treatment program to ensure that such water does not create a hazard or adversely affect other building areas or materials.

E. Anchorages:

1. Remove anchorages associated with removed items.

2. Dismantle anchorages associated with dismantled items.

3. In historic surfaces, patch or repair holes created by anchorage removal or dismantling according to Section that is specific to the historic surface being patched.

END OF SECTION 024296

HISTORIC DECORATIVE METAL CLEANING 050371 - 1

SECTION 050371 - HISTORIC DECORATIVE METAL CLEANING

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes historic treatment of decorative metal in the form of cleaning as follows:

1. Cleaning metal.

2. Removing paint.

3. Removing corrosion.

4. Priming for repainting.

B. Related Requirements:

1. Section 013591 "Historic Treatment Procedures" for general historic treatment requirements.

2. Section 024296 “Historic Removal and Dismantling” for general handling requirements of historic cast iron components

3. Section 050383 “Historic Cast Iron Repair” for general repair requirements.

1.2 DEFINITIONS

A. Low-Pressure Spray:

1. Pressure: 100 to 400 psi.

2. Flow Rate: 4 to 6 gpm.

B. Medium-Pressure Spray:

1. Pressure: 400 to 800 psi.

2. Flow Rate: 4 to 6 gpm.

1.3 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Review minutes of Preliminary Historic Treatment Conference that pertain to historic treatment of decorative metal.

2. Review methods and procedures related to historic treatment of decorative metal.

HISTORIC DECORATIVE METAL CLEANING 050371 - 2

1.4 ACTION SUBMITTALS

A. Product Data: For each type of product.

1.5 QUALITY ASSURANCE

A. Historic Treatment Specialist Qualifications: A qualified historic decorative metal cleaning specialist. Cleaning specialist shall be experienced in using mechanical and chemical methods on the types of metal surfaces indicated.

B. Mockups: Prepare mockups of historic treatment cleaning processes on existing surfaces to demonstrate aesthetic effects and to set quality standards for materials and execution. Prepare mockups so they are inconspicuous.

1. Cleaning: Prepare an area approximately 2 sq. ft. for each process on each type of metal indicated for treatment.

PART 2 - PRODUCTS

2.1 CLEANING MATERIALS

A. Water: Potable.

B. Hot Water: Water heated to a temperature of 140 to 160 deg F.

C. Detergent Solution, Job Mixed: Solution prepared by mixing 2 cups of tetrasodium pyrophosphate (TSPP), 1/2 cup of laundry detergent, and 20 quarts of hot water for every 5 gal. of solution required.

D. Nonacidic Liquid Chemical Cleaner: Manufacturer's standard mildly alkaline liquid cleaner, formulated for removing organic soiling from ordinary building materials including polished stone, brick, copper, brass, bronze, aluminum, stainless steel, plastics, wood, and glass.

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following or approved equal:

a. American Building Restoration Products, Inc.

b. Cathedral Stone Products, Inc.

c. Dumond Chemicals, Inc.

d. PROSOCO, Inc.

E. Abrasive Materials:

1. Abrasives for Ferrous Metal Cleaning: Aluminum oxide paper, emery paper, fine steel wool, steel scrapers, and steel-wire brushes of various sizes.

F. Rust Remover: Manufacturer's standard phosphoric acid-based gel formulation, also called "naval jelly," for removing corrosion from iron and steel.

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HISTORIC DECORATIVE METAL CLEANING 050371 - 3

2.2 PAINT REMOVERS

A. Alkaline Paste Paint Remover: Manufacturer's standard alkaline paste or gel formulation for removing paint from metals and containing no methylene chloride.

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following or approved equal:

a. American Building Restoration Products, Inc.

b. Diedrich Technologies, Inc.; a Hohmann & Barnard company.

c. EaCo Chem, Inc.

2.3 FERROUS METAL PRIMERS

A. Finish Primer: Primer complying with applicable requirements in Section 099600 "High- Performance Coatings " for finish painting of primed historic metal.

PART 3 - EXECUTION

3.1 HISTORIC DECORATIVE METAL CLEANING, GENERAL

A. Have historic decorative metal cleaning performed by a historic treatment specialist.

B. Execution of the Work: In cleaning historic items, disturb them as minimally as possible and as follows:

1. Remove deteriorated coatings and corrosion.

2. Sequence work to minimize time before protective coatings are reapplied.

3. Clean items in place unless otherwise indicated.

C. Mechanical Coating Removal: Use most gentle mechanical methods, such as scraping and wire brushing, that will not abrade metal substrate. Do not use abrasive methods such as sanding or power tools except as indicated as part of the historic treatment program and approved by Government.

D. Repaint: Where indicated, prepare painted decorative metal by cleaning surface, removing existing paint and priming for painting as specified.

3.2 CLEANING

A. Use only those methods indicated for each type of decorative metal and its location.

1. Brushes: If using wire brushes, use brushes of same base metal composition as metal being treated. Use brushes that are resistant to chemicals being used.

2. Spray Equipment: Use spray equipment that provides controlled application at volume and pressure indicated, measured at nozzle. Adjust pressure and volume to ensure that spray methods do not damage surfaces.

a. Equip units with pressure gages.

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HISTORIC DECORATIVE METAL CLEANING 050371 - 4

b. For chemical-cleaner spray application, use low-pressure tank or chemical pump suitable for chemical cleaner indicated, equipped with nozzle having a cone-shaped spray.

c. For water-spray application, use fan-shaped spray that disperses water at an angle of 25 to 50 degrees.

d. For heated water-spray application, use equipment capable of maintaining temperature between 140 and 160 deg F at flow rates indicated.

3. Uniformity: Perform each cleaning method in a manner that results in uniform coverage of all surfaces, including corners, contours, and interstices, and that produces an even effect without streaks or damaging surfaces.

B. Water Cleaning: Clean with hot water applied by medium-pressure spray. Supplement with natural-fiber or plastic bristle brush. Use small brushes to remove soil from joints and crevices.

C. Detergent Cleaning:

1. Wet surface with hot water applied by low-pressure spray.

2. Scrub surface with detergent solution and natural-fiber or plastic bristle brush until soil is thoroughly dislodged and can be removed by rinsing. Use small brushes to remove soil from joints and crevices. Dip brush in solution often to ensure that adequate fresh detergent is used and that surface remains wet.

3. Ferrous Metals: Do not rinse ferrous metals with water; neutralize cleaner on ferrous metals as recommended in writing by manufacturer. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

D. Nonacidic Liquid Chemical Cleaning: Apply chemical cleaner to surfaces according to chemical-cleaner manufacturer's written instructions.

1. Wet surface with hot water applied by low-pressure spray.

2. Apply cleaner to surface in two applications by brush or low-pressure spray.

3. Let cleaner remain on surface for period recommended in writing by chemical-cleaner manufacturer.

4. Ferrous Metals: Do not rinse ferrous metals with water; neutralize chemical cleaner on ferrous metals as recommended in writing by manufacturer. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

E. Cleaning with Abrasive Pads: Clean surfaces to remove dirt by light rubbing with abrasive pads and water. Do not rinse ferrous metals with water; wipe with damp cloths to remove residue.

F. Chemical Rust Removal:

1. Remove loose rust scale with approved abrasives for ferrous metal cleaning.

2. Apply rust remover with brushes or as recommended in writing by manufacturer.

3. Allow rust remover to remain on surface for period recommended in writing by manufacturer or as determined by testing. Do not allow extended dwell time.

4. Wipe off residue with mineral spirits and either steel wool or soft rags, or clean with method recommended in writing by manufacturer to remove residue.

5. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

HISTORIC DECORATIVE METAL CLEANING 050371 - 5

6. Prime immediately to prevent rust. Do not touch cleaned metal surface until

G. Mechanical Rust Removal:

1. Remove rust with approved abrasives for ferrous metal cleaning.

2. Wipe off residue with mineral spirits and either steel wool or soft rags.

3. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

4. Prime immediately to prevent rust. Do not touch cleaned metal surface until primed.

3.3 PAINT REMOVAL

A. Use only those paint-removal methods indicated for each type of decorative metal.

1. Application: Apply paint removers according to paint-remover manufacturer's written instructions. Do not allow paint removers to remain on surface for periods longer than those indicated or recommended in writing by manufacturer.

2. Brushes: If using wire brushes, use brushes of same base metal composition as metal being treated. Use brushes that are resistant to chemicals being used.

3. Spray Equipment: Use spray equipment that provides controlled application at volume and pressure indicated, measured at nozzle. Adjust pressure and volume to ensure that spray methods do not damage surfaces.

a. Equip units with pressure gages.

b. Unless otherwise indicated, hold spray nozzle at least 6 inches from surface and apply material in horizontal, back-and-forth sweeping motion, overlapping previous strokes to produce uniform coverage.

c. For chemical spray application, use low-pressure tank or chemical pump suitable for chemical indicated, equipped with cone-shaped spray.

d. For water-spray application, use fan-shaped spray that disperses water at an angle of 25 to 50 degrees.

e. For heated water-spray application, use equipment capable of maintaining temperature between 140 and 160 deg F at flow rates indicated.

B. Paint Removal with Alkaline Paste Paint Remover:

1. Remove loose and peeling paint using water, scrapers, stiff brushes, or a combination of these. Let surface dry thoroughly.

2. Apply paint remover to dry, painted metal with brushes.

3. Allow paint remover to remain on surface for period recommended in writing by manufacturer or as determined by testing.

4. Use mechanical methods recommended in writing by manufacturer to remove chemicals and paint residue.

5. Repeat process, if necessary, to remove all paint.

3.4 PRIMING

A. Repair Primer: Apply immediately after completing a repair.

HISTORIC DECORATIVE METAL CLEANING 050371 - 6

B. Finish Primer: Apply as soon after cleaning as possible.

3.5 HISTORIC DECORATIVE METAL CLEANING SCHEDULE

A. Treatment of Decorative Cast-Iron:

1. Perform work as indicated on drawings.

2. Cleaning: Water cleaning, Detergent cleaning, or Chemical cleaning.

3. Paint Removal: Alkaline paste paint remover.

4. Rust Removal: Chemical or Mechanical.

5. Repair: As specified in Section 050383 "Historic Cast Iron Repair."

6. Finish Treatment: As specified in Section 099600 "High-Performance Coatings."

END OF SECTION 050371

HISTORIC CAST IRON REPAIR 050383 - 1

SECTION 050383 - HISTORIC CAST IRON REPAIR

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes historic treatment of cast iron in the form of repair as follows:

1. Repairing cast iron and replacing damaged and missing components in place.

2. Removing and dismantling cast iron for shop repair and replacement of components; reinstalling repaired cast iron.

3. Re-anchoring cast iron to building structure.

B. Related Requirements:

1. Section 013591 "Historic Treatment Procedures" for general historic treatment requirements

2. Section 024296 "Historic Removal and Dismantling" for general handling requirements of cast iron components.

3. Section 050374 "Historic Decorative Metal Replication” for replication of historic metal components that are part of repair work.

4. Section 099600 "High-Performance Coatings” for finishing cast iron.

1.2 DEFINITIONS

A. Low-Pressure Spray: 100 to 400 psi; 4 to 6 gpm.

B. Medium-Pressure Spray: 400 to 800 psi; 4 to 6 gpm.

1.3 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Review methods and procedures related to historic cast-iron repair.

1.4 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Shop Drawings:

1. Include plans, elevations, and sections showing locations and extent of repair and replacement work, with enlarged details of replacement parts indicating materials, profiles, methods of attachment, accessory items, and finishes.

HISTORIC CAST IRON REPAIR 050383 - 2

C. Samples: For each exposed product and for each color and texture specified.

D. Delegated-Design Submittal: For structural performance of repaired railings and anchors, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation, licensed in the State of California.

1.5 INFORMATIONAL SUBMITTALS

A. Evaluation Reports: For post-installed structural anchors, from ICC-ES.

1.6 QUALITY ASSURANCE

A. Historic Treatment Specialist Qualifications: A qualified historic cast-iron repair specialist. Experience in repairing, brazing, and welding wrought iron, steel, or cuprous metals and installing and finishing new cast-iron work is insufficient experience for historic cast-iron repair work.

1. Historic Brazing-and-Welding Specialist: A qualified brazing-and-welding-repair specialist experienced with these repairs on historic cast iron. Have the brazing-and-welding specialist work under direction of the historic treatment specialist.

B. Mockups: Prepare mockups of historic treatment repair processes to demonstrate aesthetic effects and to set quality standards for materials and execution and for fabrication and installation. Prepare mockups so they are inconspicuous.

1. Cast-Metal Components: Submit patterns, models, or plaster castings made from existing cast-iron item for each replacement casting required.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Delegated Design: Engage a qualified professional engineer, as defined in Section 014000 "Quality Requirements," to design railings and anchors according to structural performance requirements.

B. Structural Performance: Railings, including attachment to building construction, shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

1. Uniform load of 50 lbf/ft. applied in any direction.

2. Concentrated load of 200 lbf applied in any direction.

3. Uniform and concentrated loads need not be assumed to act concurrently.

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2.2 METAL MATERIALS

A. Provide metal materials made of the alloys, forms, and types that match existing metals and that have the ability to receive finishes matching existing finishes unless otherwise indicated.

2.3 PREPARATORY CLEANING MATERIALS

A. Water: Potable.

B. Hot Water: Water heated to a temperature of 140 to 160 deg F.

C. Detergent Solution, Job Mixed: Solution prepared by mixing 2 cups of tetrasodium pyrophosphate (TSPP), 1/2 cup of laundry detergent, and 20 quarts of hot water for every 5 gal. of solution required.

D. Abrasive Materials:

1. Abrasive Pads: Non-scratch, of the following type(s):

a. Abrasive Pad with Sponge: Combination plastic abrasive pad, consisting of a sponge enclosed with a woven urethane, polypropylene, or other plastic mesh or fabric, without other abrasive components that can scratch metal.

b. Abrasive Pad of Plant Fibers: Agave, loofa, or another tough plant fiber, without other abrasive components that can scratch metal.

2. Medium Abrasives for Ferrous Metals: Aluminum-oxide paper, emery paper, fine steel wool, steel scrapers, and steel-wire brushes of various sizes.

3. Medium Abrasives for Copper-Alloys: Extra-fine bronze wool or plastic abrasive pads.

E. Wash Cloths: Lint-free, absorbent, durable cloth without abrasives that can scratch metal.

F. Rust Remover: Manufacturer's standard phosphoric acid-based gel formulation, also called "naval jelly," for removing corrosion from iron and steel.

2.4 FASTENERS

A. Fasteners: Fasteners of the same basic metal as fastened metal unless otherwise indicated. Use metals that are noncorrosive and compatible with each metal joined.

1. Match existing fasteners in material and in type of fastener unless otherwise indicated.

2. Use concealed fasteners for interconnecting cast-iron components and for attaching them to other work unless exposed fasteners are unavoidable or the existing fastening method.

3. For exposed fasteners, use bolts of square-head profile unless otherwise indicated or another head is required to match the existing fastening method as

HISTORIC CAST IRON REPAIR 050383 - 4

determined by Government. Any use of hex-head bolts is not original to the period and are to be replaced with square-head bolts.

4. Finish heads of exposed fasteners to match finish of metal fastened unless otherwise indicated.

B. Post-Installed Structural Anchors: Fastener systems with bolts of same basic metal as fastened metal, if visible, unless otherwise indicated; with working capacity greater than or equal to the design load, according to an evaluation report acceptable to authorities having jurisdiction, based on ICC-ES AC193 or ICC-ES AC308 as appropriate for the substrate.

1. Uses: Securing railings and oil tanks to structure.

2. Type: Torque-controlled, expansion anchor or adhesive anchor.

3. Material for Interior Locations: Carbon-steel components zinc-plated to comply with ASTM B633 or ASTM F1941, Class Fe/Zn 5, unless otherwise indicated.

4. Material for Exterior or Interior Locations and Where Stainless Steel Is Indicated:

Alloy Group 2 stainless-steel bolts, ASTM F593, and nuts, ASTM F594.

2.5 ACCESSORIES

A. Metal-Patching Compound: Two-part, epoxy- or polyester-resin, metal-patching compound; knife-grade formulation as recommended in writing by manufacturer for type of metal repair indicated, tooling time required for the detail of work, and site conditions. Compound shall be produced for filling cast iron that has deteriorated because of corrosion or deformation. Filler shall be capable of filling deep holes and spreading to feather edge.

B. Brazing Rods for Cast Iron: Type and alloy as recommended in writing by brazing-rod manufacturer and as required for strength and compatibility with cast-iron items.

C. Welding Electrodes and Filler Metal: Select according to AWS specifications for welding cast-iron; use compatible metal type and alloy as required for strength, and compatibility with cast-iron items.

2.6 CAST-METAL FABRICATION

A. Custom fabricate repairs of cast-iron items and components in sizes and profiles to match existing cast iron unless otherwise indicated, with accurate curves, lines, and angles. Mill joints to a tight, hairline fit. Form assemblies and joints exposed to weather to resist water penetration and retention.

B. Provide rebates, lugs, and brackets necessary to assemble components and to attach to existing work. Drill and tap for fasteners. Use concealed fasteners where possible;

use exposed fasteners to match existing work.

C. Comply with AWS for recommended practices in welding and brazing. Clean exposed welded and brazed joints of flux, and dress exposed and contact surfaces.

HISTORIC CAST IRON REPAIR 050383 - 5

D. Castings: Fabricate castings free of warp, cracks, blowholes, or other defects that impair strength or appearance. Grind, wire brush, sandblast, and buff castings to remove seams, gate marks, casting flash, and other casting marks.

1. Finish castings to match existing cast-iron work.

2.7 FERROUS METAL FINISHES

A. Finish Primer: Primer complying with applicable requirements in Section 099600 "High- Performance Coating" for finish painting of primed metal.

PART 3 - EXECUTION

3.1 HISTORIC CAST-IRON REPAIR, GENERAL

A. Execution of the Work: In repairing historic items, disturb remaining existing work as minimally as possible and as follows:

1. Stabilize cast iron to reestablish structural integrity and weather resistance while maintaining the existing form of each item.

2. Remove deteriorated coatings and corrosion.

3. Sequence work to minimize time before protective coatings are reapplied.

4. Repair items where stabilization is insufficient to stop progress of deterioration.

5. Repair items in place unless otherwise indicated and retain as much original material as possible.

6. Replace or reproduce historic items where indicated or scheduled.

7. Make historic treatment of materials reversible whenever possible.

8. Install temporary protective measures to stabilize cast iron that is indicated to be repaired later.

B. Mechanical Coating Removal: Use gentlest mechanical methods, such as scraping and wire brushing, that do not abrade metal substrate. Do not use abrasive methods, such as sanding, or power tools except as approved by Government.

C. Repairing Cast-Iron Items: Match existing features, retaining as much original material as possible to complete the repair.

D. Replacing Cast-Iron Components: Where indicated, duplicate and replace items with new material matching existing.

1. Replace heavily deteriorated or missing parts or features of cast iron with compatible materials, using surviving prototypes to create patterns or molds for duplicate replacements.

3.2 PREPARATORY CLEANING

A. Perform preparatory cleaning before performing repair work.

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1. Brushes: If using wire brushes, use steel or stainless-steel brushes that are resistant to chemicals being used.

2. Spray Equipment: Use spray equipment that provides controlled application at volume and pressure indicated, measured at nozzle. Adjust pressure and volume to ensure that spray methods do not damage surfaces.

a. Equip units with pressure gages.

b. For water-spray application, use fan-shaped spray that disperses water at an angle of 25 to 50 degrees.

c. For heated water-spray application, use equipment capable of maintaining temperature between 140 and 160 deg F at flow rates indicated.

3. Uniformity: Perform each cleaning method in a manner that results in uniform coverage of all surfaces, including corners, contours, and interstices, and that produces an even effect without streaks or damaging surfaces.

B. Water Cleaning: Clean with hot water applied with medium-pressure spray.

Supplement with natural-fiber or plastic bristle brush and abrasive pads. Use small brushes to remove soil and loose paint from joints and crevices.

C. Detergent Cleaning:

1. Wet surface with hot water applied with low-pressure spray.

2. Scrub surface with detergent solution and natural-fiber or plastic bristle brush and abrasive pads until soil is thoroughly dislodged and can be removed by rinsing.

Use small brushes to remove soil from joints and crevices. Dip brush in solution often to ensure that adequate fresh detergent is used and that surface remains wet.

3. Ferrous Metals: Do not rinse ferrous metals with water; neutralize cleaner on ferrous metals as recommended in writing by manufacturer. Dry immediately with clean soft cloths. Follow direction of grain in metal.

D. Chemical Rust Removal:

1. Remove loose rust scale with approved, medium abrasives for ferrous metals.

2. Apply rust remover with brushes or as recommended in writing by manufacturer.

3. Allow rust remover to remain on surface for period recommended in writing by manufacturer or as determined by testing. Do not allow extended dwell time.

4. Wipe off residue with mineral spirits and either steel wool or soft rags, or clean with method recommended in writing by manufacturer to remove residue.

5. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

6. Prime immediately to prevent rust. Do not touch cleaned metal surface until primed.

E. Mechanical Rust Removal:

1. Remove rust with approved, medium abrasives for ferrous metals.

2. Wipe off residue with mineral spirits and either steel wool or soft rags.

3. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

4. Prime immediately to prevent rust. Do not touch cleaned metal surface until primed.

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3.3 DISMANTLING, REPAIR, AND INSTALLATION

A. Repair cast iron in place insofar as practicable unless otherwise indicated. Where necessary, dismantle components from their substrate and repair and reinstall them.

B. Perform dismantling work as required in Section 024296 "Historic Removal and Dismantling."

C. Installation:

1. Locate and place cast-iron items level and plumb and in alignment with adjacent construction.

a. Do not cut or abrade finishes that cannot be completely restored in the field. Return items with such finishes to the shop for required alterations, followed by complete refinishing, or provide new units as required.

2. Use concealed anchorages where possible unless otherwise indicated.

3. Form tight joints with exposed connections accurately fitted together.

4. Install concealed joint fillers, sealants, and flashings, as the Work progresses, to make exterior items weatherproof.

5. Corrosion Protection: Apply bituminous paint or other permanent separation materials on concealed surfaces where metals would otherwise be in direct contact with substrate materials that are incompatible or could result in corrosion or deterioration of either material or finish.

6. Touch Up: At completion of installation, touch up and restore damaged or defaced finish surfaces and fastener heads.

3.4 FILLING DEFECTS IN PAINTED SURFACES

A. Repair non-load-bearing defects in existing metal surfaces, including dents and gouges more than 1/16 inch deep or 1/2 inch across and all holes and tears by filling with metal-patching compound. Remove burrs. Prime iron and steel surfaces immediately after repair to prevent flash rusting.

B. Grind off repair materials that project above surface of cast iron without damaging cast-iron surface.

3.5 PRIMING

A. Finish Primer: Apply as soon after cleaning as possible.

3.6 HISTORIC CAST-IRON REPAIR SCHEDULE

A. Treatment of Cast-Iron Railing: Cast-iron railings.

1. Perform work in the shop, as indicated on drawings.

2. Paint Removal: As specified in Section 050371 "Historic Decorative Metal

Cleaning."

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3. Repairs: Replace complete railing system with custom, cast-iron as specified in Section 050374 "Historic Decorative Metal Replication.

4. Painted Finish: As specified in Section 099600 "High-Performance Coatings."

B. Light House Wrought-Iron Ladder and Cast-Iron Column: Replace/reproduce deteriorated ladder and column as indicated on drawings.

1. Perform work in the shop or in the field.

2. Relace: Replace wrought-iron and cast-iron components with new materials and fasteners.

a. Replace lighthouse ladder and column with galvanized steel as specified in Section 055010 “Metal Fabrications.”

b. Provide square-head bolts to match original means of construction. Hex-head bolts are not original to the period and should not be used whenever possible.

C. Treatment of Lantern Room Cast-Iron Surfaces: Repair all damaged surfaces and replace missing components.

1. Perform work as indicated on drawings.

2. Cleaning: As specified in Section 050371 "Historic Decorative Metal Cleaning."

3. Paint Removal: As specified in Section 050371 "Historic Decorative Metal

Cleaning."

4. Rust Removal: Chemical or Mechanical.

5. Repair: Patch by filling or replacing cast-iron material with new materials. Splice new material into deteriorated sections; reinforce, refasten, realign as needed to restore surfaces and provide seamless transitions wherever possible.

a. When replacement is required refer to specification Section 050374 "Historic Decorative Metal Replication."

6. Finish Treatment:

a. Painted Finish: As specified in Section 099600 “High-Performance Coatings.”

END OF SECTION 050383

HIGH-PERFORMANCE COATINGS 099600 - 1

SECTION 099600 - HIGH-PERFORMANCE COATINGS

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes surface preparation and the application of high-performance coating systems on the following substrates:

1. Exterior Substrates:

a. Concrete and Masonry, vertical and horizontal surfaces.

b. Steel.

c. Cast Iron

d. Wrought Iron

e. Galvanized metal.

2. Interior Substrates:

a. Concrete and Masonry, vertical and horizontal surfaces.

b. Steel.

c. Cast Iron

d. Wrought Iron

e. Wood.

B. Related Requirements:

1. Section 013591 "Historic Treatment Procedures" for general historic treatment requirements.

2. Section 024296 “Historic Removal and Dismantling” for general handling requirements.

3. Section 050371 “Historic Decorative Metal Cleaning” for the cleaning and preparation of historic metals.

4. Section 050383 “Historic Cast Iron Repair” for general…