08750 Add 2.doc

Interior Renovations at U.S. Courthouse GSA Number GS‑03P‑98-CDC-0019

Pittsburgh, Pennsylvania

SECTION 08750

HARDWARE RESTORATION

PART 1 - GENERAL

1.1

RELATED DOCUMENTS

A. Work of this section shall comply with all Contract Documents, including the General and Supplementary Conditions and Division 1 - General Requirements, and the Drawings.

B. Related specification sections that should be reviewed include: 08710 Door Hardware, and 08715 Hardware Set Schedule.

1.2

DESCRIPTION

A.

The Contractor must provide all supervision, labor, materials, equipment and services to perform all operations required to complete the work of this Section in strict accordance with these Specifications and the requirements of all Documents, or as may be required by conditions and controlling authorities.

B.

Definitions:

1.

“Door Hardware” shall include existing to remain interior door hardware at the doors in the corridors and elevator lobbies, as indicated in Section 08000 Door Schedule. These include: closers, handles with plates, hinges, locks, mail slots among other items.

C.

Work Included: Without restricting the totality of the work, the restoration of the door hardware shall include the following:

1. Photo documentation of existing conditions.

2. Removal of the hardware from the doors prior to repainting. All hardware should be carefully labeled and stored in a safe location on-site for future reinstallation.

3. Cleaning of all hardware.

4. Oil or lubricate all hardware to ensure smooth operation.

5. Install new hardware per the drawings.

6. Reinstall original hardware per the drawings.

1.3

SUBMITTALS

A.

Literature: Submit three (3) copies of manufacturer’s standard printed literature for all materials specified herein.

Methods of Protection: Prior to beginning restoration, the Contractor shall submit to the Architect, for approval, a written description of the proposed materials and methods of protection for preventing damage to adjacent materials, and the building interior during the course of the work of this section.

Should the contractor wish to modify any cleaning method specified, he/she shall submit his/her proposal in writing for consideration and review. The Architect will have the right to ask for sample installations before final approval. Any such modifications or changes shall be at no additional cost to the Owner.

1.4

REGULATORY, SAFETY AND HEALTH REQUIREMENTS

Comply with all Municipal, State, and Federal Regulations governing all the materials and other work of this section.

Take all necessary precautions to protect all workers, building occupants and visitors, and the general public from all materials and operations of the work of this Section.

1.5

REFERENCE SAMPLES

Prior to beginning the work of this section, prepare the following cleaning samples for approval by the Architect. The work may not proceed until the Architect has given written approval of the samples. The samples shall be selected by the Architect, and shall form the minimum standard for cleaning work.

Sample Installations:

Remove all hardware from a representative door, the location of which will be chosen by the Architect. Clean all hardware, oil/lubricate and make necessary repairs as required per the drawings. Reinstall hardware after completion of the door repainting and install new hardware per the drawings. The approved cleaned section shall form a quality standard for all further cleaning work.

1.6

QUALITY ASSURANCE

Restoration Specialist: The Contractor or subcontractor who will perform the work specified in this section must, within the last five (5) consecutive years, have successfully completed in a timely fashion at least five (5) comparable projects. The contractor shall submit references for five (5) such projects.

Materials - Materials shall conform to the latest edition of reference specifications applicable and specified herein and to applicable codes and requirements of local authorities having jurisdiction.

Materials shall conform to governing regulations regarding the content of volatile organic compounds (VOC).

All bidding Contractors must visit the site beforehand and make themselves thoroughly familiar with specific conditions relating to this Section.

D.

In acceptance or rejection of this work, no account shall be taken for incompetence or lack of skill on the part of the workers.

E.

The Contractor shall maintain a steady work crew consisting of skilled craftsmen who are experienced with the materials and methods specified and familiar with the design requirements. The Contractor shall confirm that all workers under his/her direction fully understand the requirements of the job.

F.

The foreman shall be present on site daily during the hardware removal and re-installation process.

G.

The Contractor shall make provisions for safe access for the Architect to inspect, at close range, all metals indicated for cleaning. Inspections may occur at any time during and following cleaning operations.

1.7

DELIVERY, STORAGE AND HANDLING

Deliver materials to the site in the manufacturer’s original and unopened containers and packaging, bearing labels as to the type of material, brand name, and manufacturer’s name.

1.8

JOB CONDITIONS

A. Portions of the project area will remain open to the building occupants during the completion of the work. The Contractor must provide all necessary protection and precautions to ensure the safety, and comfort of the building occupants during the course of the work. The protection must include sound control methodologies and mechanisms as required to maintain a professional working environment for the building occupants. See Division 01.

B. Protect surrounding materials from the work of this section. Any damage to adjacent materials is unacceptable, and shall be repaired of if required replaced by the Contractor to the full satisfaction of the Architect and Owner at no additional cost to the Owner.

PART 2 - PRODUCTS

2.1

CLEANING MATERIALS FOR BRONZE HARDWARE

For General Cleaner: Triton XL, non-ionic surfactant, distributed by Conservator’s Emporium, 100 Standing Rock Circle, Reno, NV 89511, (775-852-0404).

Nylon pads: “Green” and “White” low abrasion pads, as manufactured by 3M Company, MN.

C. For removal of organic coatings and residue: Acetone.

D. Oxalic Acid: Manufactured by WEGO Chemical and Mineral Corporation, 17 Barstow Rd., Great Neck, NY 11021.

Protective coating: Clear non-yellowing acrylic lacquer coating, such as Syncrylac – Varnish Clear Y478 organic coating as manufactured by Seagrave Coatings Corp., Carlstadt, NJ 07072.

PART 3 - EXECUTION

3.1

INSPECTION

Prior to commencement of the work of this Section, carefully inspect the installed work of all other trades and verify that all such work is complete to the point where this component may properly commence.

B. Surfaces, which cannot be cleaned as specified, shall be immediately brought to the attention of the Architect and Owner in writing. Starting of such work without such notification will be considered acceptance by the Contractor of the surfaces involved. Contractor will be required to replace any unsatisfactory work caused by improper or defective surfaces, as directed by the Owner at no additional cost to the Owner.

3.2

PROTECTION

Protect work of other trades against damage, injury or soiling from materials, tools or utensils used.

3.3

CLEANING AND RESTORATION OF BRONZE DOOR HARDWARE

A. Execution:

Step #1

All hardware should be removed from the doors prior to cleaning.

Step #2

If necessary, and if a lacquer coating exists, the restoration should begin with the removal of any clear organic coatings and residue using Acetone applied with dampened towels and natural bristle brushes.

Step #3

Dirt, oxidation and mild corrosion should be removed using detergents and non-abrasive 3M pads, rubbing in the direction of the metal grain.

Step #3a (alternate)

If the detergent is not effective in removing all dirt and corrosion, the following steps should be taken:

· Dirt, oxidation and mild corrosion should be removed by scrubbing the bronze using non-abrasive 3M pads and horse hair brushes with a slurry of #1 pumice and a 5% solution of Oxalic Acid in water.

· The metal should then be rinsed with clean water to remove the cleaning residue.

· This process should be continued until all oxidation and corrosion is removed.

Step #4

All surfaces should be thoroughly rinsed upon completion with clean water to neutralize the acid.

Step #5

Solvent should be applied to the clean metal with soft cloths for the final cleaning and for preparation of the coating.

Step #6 Apply sprayed lacquer coating (at least two coats).

Step #7

Oil or lubricate hardware and make any necessary repairs to ensure smooth operation.

Installation

1. Reinstall restored hardware per the drawings.

2.

Install new hardware per the drawings and specifications.

3.7

PROTECTION AND CLEAN-UP

After each day's work, remove all rags, cans, rubbish, and discarded materials from the site.

Upon completion of the work, Contractor shall remove from the premises and dispose of all equipment, surplus material, empty containers and other debris resulting from his/her operations. The building and surrounding areas shall be left clean and neat in all respects.

C. The Contractor shall, upon completion, leave all doors and adjacent surfaces clean and free from any stain, splatterings, smears, spills or smudges which are the result of his/her operations.

D. Protection: Protect work of other trades against damage by finishing work. Correct any damage by cleaning, repairing or replacing, as acceptable to Owner.

After substantial completion, touch-up and restore all damaged or defaced surfaces.

END OF SECTION

October 26, 2010

Addendum 2 08750 - 1 Hardware Restoration