06500 Add 2.doc

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

Pittsburgh, Pennsylvania

SECTION 06500

WOOD REPAIR AND REFINISHING

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.

1.2

DESCRIPTION OF WORK

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.

Work included (but not limited to): Repair and refinishing of damaged areas of woodwork as shown in the Drawings.

C.

Extent of historic wood work requiring repair and refinishing is limited to the existing historic courtroom as indicated on the documents.

D.

Scope of woodwork restoration includes the following:

1. Repair of all damaged areas of woodwork which primarily consists of minor holes, gouges and surface scratches.

2. Strip and refinish built-in and removable furniture, including Judge’s Bench, Reporter’s Bench, Jury Box, Witness Box, Spectator’s Benches and Rail.

3. Cleaning and select refinishing of wall paneling.

1.3

QUALITY ASSURANCE

A.

Woodwork Restoration Specialist: The Contractor or subcontractor who will perform the work specified in this section must, within the last five (5) to 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. This person shall be completely familiar with the specified requirements, materials, methods and referenced standards required to complete this work. This person shall be completely familiar with the relationship of the work specified in this section, including the timely completion of such work as it relates to work noted in other sections of the specifications. This person shall remain accessible to the Architect, Conservator, or owner at all times during the execution of the work of this section.

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.

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

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.

1.4

REFERENCES AND STANDARDS

AWI Quality Standard: Comply with requirements of “Architectural Woodwork Quality Standards” latest edition published by the AWI for premium grade materials and workmanship, unless more stringent requirements are shown on the Drawings or specified herein.

1.5

REGULATORY, SAFETY AND HEALTH REQUIREMENTS

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

B. The Contractor shall take every precaution against fire. All refinishing materials at the job shall be stored in closed containers, in a well-ventilated, locked area. Rags, waste and other hazardous materials shall be kept in closed containers and oily debris shall be kept tightly covered in a properly labeled container for daily removal. If tarpaulins are used, they shall be flame-proofed. The storage area shall be kept neat and no smoking shall be permitted within the space.

The Contractor shall provide and shall maintain proper hand-held fire extinguishers in the immediate area and all personnel shall be instructed in their use and informed of their location.

C. The Contractor shall also take every precaution against the hazards of fume inhalation. All areas shall be kept well ventilated at all times. Where natural ventilation is insufficient to provide suitable conditions, special fans shall be provided. If necessary, provide suitable respirators or masks for workers.

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.

1.6

PRODUCT DELIVERY, STORAGE AND HANDLING

Store all material in a dry location and in waterproof containers. Keep containers tightly closed and away from open flames. Protect liquid components from freezing. Comply with manufacturer’s recommendations for minimum and maximum temperature requirements for storage.

1.7

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

B. Conditioning: Woodworker shall advise Contractor of temperature and humidity requirements for woodwork refinishing areas. Refinishing shall not proceed until required temperature and relative humidity have been stabilized and will be maintained.

Maintain temperature and humidity in areas where refinishing will occur as required to maintain moisture content within 1% tolerance of optimum moisture content from the date of refinishing through the remainder of the construction period through project closeout. The woodworker shall determine optimum moisture content and required temperature and humidity conditions. Once determined, the woodworker must document the required humidity and temperature, and the methodology for maintaining the humidity and temperature, and submit to the Architect/Owner for review and approval.

Examine the work of other trades prior to beginning refinishing. Do not begin work unless preparatory work by other trades has been completed to the woodworker’s satisfaction.

1.8

SUBMITTALS

A.

Quality Certification: Submit Fabricator’s certification, stating that the fabricated work complies with quality grades and other requirements indicated.

B.

Work Description: Prior to commencing operations, the Contractor shall submit a written description of the entire methods and procedures proposed for repairing, cleaning, and refinishing the woodwork.

Sample Installations

1.

Prior to beginning the work of this section, sample installations must be prepared for approval by the Contracting Officer. The work may not proceed until the Contracting Officer has given written approval of the sample installations. These approved sample installations shall be retained through the restoration process and shall be the standard by which all restoration and refinishing work will be evaluated. Properly finished and maintained sample installations may be incorporated into work.

2.

Prepare a 200mm square repair sample installation as directed byContracting Officer.

3.

Prepare a 1200mm square cleaning sample installation as directed by Contracting Officer.

4.

Prepare a 1200mm square refinishing sample installation as directed by Contracting Officer, for each type of refinishing work.

5.

Warranty: Submit signed warranty that all refinished woodwork shall be guaranteed against defects in materials and workmanship for the life of the sample installation. The guarantee shall also include refinishing and it shall specify conditions or items which might void guarantee.

PART 2 - PRODUCTS

2.1

BASIC MATERIALS

General Cleaning Solution: Mineral Spirit/Water Emulsion consisting of 50% mineral spirits and 40% distilled water and 10% Triton XL detergent for general cleaning.

Mineral Spirits: Shall conform to ASTM D236-61 or as recommended by the manufacturer of the product being use.

Triton XL as manufactured by Union Carbide Corporation and distributed by Conservator’s Emporium, 100 Standing Rock Circle, Reno, NV 89511 (775-852-0404) or equal.

Wood Grain Filler: As specified in Section 09900, Painting and Finishing.

C. Stripper: As recommended by Woodwork Restoration Specialist for removal of each type of existing finish coating, without disturbance to existing stain.

D. Finish Materials: As specified in Section 09900, Painting and Finishing.

PART 3 - EXECUTION

3.1

PREPARATION

Inspection: Prior to work of this Section, carefully inspect the installed work of all other trades and certify that all such work is complete to the point where the refinishing may properly commence.

Review with the Contracting Officer the scope of work to be repaired and refinished in order that all existing woodwork shall receive adequate and sufficient treatment.

Protect surrounding walls, floor, ceiling and light fixtures and all other adjacent fixtures and finishes.

3. 2

REPAIR

Minor Holes/Cracks/Gouges

Any holes, cracks or gouges less than 5mm can be filled with a color matched hand wax.

Repair of Deep Scratches in Woodwork

Remove deep scratches by hand sanding along scratch an area 15mm to 30mm wider than scratch on both sides. Sand to smooth uniform surface, taking care to sand no deeper than necessary in order to maintain integrity of wood. Wipe away all sawdust and touch up with new matching penetrating oil stain only if required to match surrounding area. Note: Testing of sample areas of stain colors in concealed locations on the actual wood is critical where matching an existing stain to remain. Do not rely on manufacturer's color chips since the stain darkens different wood species to different degrees.

3.3

CLEANING

A.

Cleaning of Wooden Surfaces

1. All wood surfaces should be cleaned using an emulsion consisting of 50% mineral spirits and 40% distilled water and 10% Triton XL surfactant which should be applied with paper towels and soft brushes. At no time should this emulsion stay on the surface for more than 45 seconds to avoid swelling of the wood. The surface should then be cleaned with mineral spirits to remove any surfactant and buffed dry with soft cloths or paper towels.

2.

3.4

REFINISHING

Removal of Existing Coatings

Remove existing finish coating using methods recommended by Woodwork Restoration Specialist, taking care not to remove existing stain.

2.

The surface should then be lightly polished with 1,200-grit paper to remove dust and particles. All sanding dust should be completely removed prior to the application of coatings.

3.

Apply wood grain filler to all wood which has open grain or other damage such that sanding will not produce sufficiently smooth surface for finishing. Apply filler which is colored with stain and thinned with mineral spirits to a creamy consistency. Brush filler liberally along the direction of the grain and brush off lightly with the grain. After most thinner has evaporated (approximately 5 to 10 minutes), after filler has lost its gloss and become mealy but before it has set and hardened, wipe across grain with burlap or other coarse cloth to rub filler into pores and remove excess. Filler is ready for wiping when finger no longer slips when rubbed across surface and when filler forms a ball under pressure of rubbing. Final rub with clean cloths is along grain. Allow 24 hours drying time before applying finish coats.

B. Refinishing

Finish woodwork in accordance with Section 09900, Painting and Finishing.

2.

Where select areas of finishing are required at existing wood paneling, match existing adjacent finish to remain. Feather new finish as required to blend new and existing finishes.

3.4

CLEAN-UP

A. After each days work, remove all rags, cans, rubbish, discarded paint materials from the site.

B. Upon completion of the work, Contractor shall remove from the premises and dispose of all scaffolding and 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 glass areas, floors and walks, hardware, and all other adjacent surfaces clean and free from any stain, splatterings, smears, spills or smudges which are the result of his/her operations. Contractor shall replace any glass damaged in anyway by his/her operations.

Provide "Wet Paint" signs as required to protect newly-varnished and cleaned finishes. Remove temporary protective wrappings provided by others for protection of their work, after completion of refinishing operations.

E. At the completion of work of other trades, touch-up and restore all damaged or defaced surfaces.

END OF SECTION

October 26, 2010

Addendum 2 06500 - 1 Wood Repair and Refinishing