Wood gym floor spec.docx

SECTION 09 64 66

WOOD ATHLETIC FLOORING

SECTION 09 64 66

WOOD ATHLETIC FLOORING

PART 1 GENERAL 1.01 SECTION INCLUDES

A. Wood athletic floor assembly WAF-1.

1. Work of the Section includes all tools and services to install a complete wood floor system from the concrete surface upward through the sanding and finishing, game lines, and installation of perimeter moldings and thresholds.

1.02 RELATED REQUIREMENTS

A. Section 11 66 23 - Gymnasium Equipment: Athletic equipment installed through flooring assembly. Coordinate with Owner for volleyball sleeves to be cored into floor. Provide covers for standards.

1.03 REFERENCE STANDARDS

A. ASTM D4397 - Standard Specification for Polyethylene Sheeting for Construction, Industrial, and Agricultural Applications.

B. ASTM F1869 - Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride.

C. ASTM F2170 - Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes.

D. MFMA (SPEC) - Guide Specifications for Maple Flooring Systems.

E. SCAQMD 1168 - South Coast Air Quality Management District Rule No.1168.

1.04 SUBMITTALS

A. Product Data: Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for wood athletic floor assemblies.

1. For field-applied finishes and game-line and marker paints, including printed statement of VOC content.

2. Submit MFMA Recommendations for correct preparation, finishing and testing of concrete subfloor surfaces to receive wood flooring.

3. Submit manufacturer's recommendations and requirements for flooring preparation, testing and slab conditions to meet warranty requirements.

B. Shop Drawings: Show installation details including location and layout of each type of floor assembly and accessory. Include the following:

1. Expansion provisions and trim details.

2. Layout, colors, widths, and dimensions of game lines and markers.

3. Locations of floor inserts for athletic equipment installed through flooring assembly.

C. Selection Samples: Manufacturer's color charts showing colors and glosses available for the following:

1. Floor finish.

2. Game-line and marker paint.

3. Vented grilles.

D. Samples for Verification: For each type of athletic floor assembly and accessory required; approximately 12 inches and of same thickness and material indicated for the Work.

1. Include sample sets showing the full range of normal color and texture variations expected in wood flooring.

2. Include sample sets showing finishes and game-line paint and marker paint colors applied to wood flooring.

E. Qualification Data: For Installer.

F. Maintenance Data: For wood athletic floor assemblies and finish systems to include in maintenance manuals.

1. Include recommendations for types of tape that can be used by Owner for temporary line marking without damaging floor finish.

1.05 QUALITY ASSURANCE

A. Installer Qualifications: An experienced installer who has completed wood athletic floor assembly installations similar in material, design, and extent to that indicated for this Project, whose work has resulted in installations with a record of successful in-service performance and who is approved by the wood flooring manufacturer.

1. Installers shall be MFMA Mill Accredited Installation Company with MFMA Accredited Installers on-site for the duration of the wood floor installation.

2. Installer responsibilities include installation and field finishing of athletic floor assembly components and accessories, and application of game lines and markers.

B. Maple Flooring: Comply with MFMA (SPEC) grading rules for species, grade, and cut.

1. Provide flooring that carries MFMA mark on each bundle or piece.

1.06 DELIVERY, STORAGE, AND HANDLING

A. Deliver assembly materials in unopened cartons or bundles.

B. Protect wood from exposure to moisture. Do not deliver wood components until after concrete, masonry and similar wet work is complete and dry.

C. Store wood components in a dry, warm, well-ventilated, weathertight location and in a horizontal position.

1.07 PROJECT CONDITIONS

A. Conditioning period begins not less than seven days before athletic floor assembly installation, is continuous through installation, and continues not less than seven days after athletic floor installation.

1. Environmental Conditioning: Maintain an ambient temperature between 65 and 75 deg F and relative humidity planned for building occupants, but not less than 35 percent or more than 50 percent, in spaces to receive athletic floor assemblies during the conditioning period.

2. Wood Conditioning: Move wood components into spaces where they will be installed, no later than beginning of the conditioning period.

a. Do not install athletic floor assemblies until wood components adjust to relative humidity of, and are at same temperature as, spaces where they are to be installed.

b. Open sealed packages to allow wood components to acclimatize immediately on moving wood components into spaces in which they will be installed.

B. After conditioning period, maintain relative humidity and ambient temperature planned for building occupants.

C. Install athletic floor assemblies after other finishing operations, including painting, and all overhead work such as mechanical have been completed.

1.08 WARRANTY

PART 2 PRODUCTS 2.01 MANUFACTURERS

A. Products WAF-1:

1. Action Floor Systems LLC; Action Thrust I: www.actionfloors.com.

2. Connor Sports Flooring, Inc.; Product Neoshok: www.connorfloor.com.

3. Robbins, Inc.; Product Bio-Cushion Classic: www.robbinsfloor.com.

4. Substitutions: See Section 01 60 00 - Product Requirements.

2.02 MATERIALS, GENERAL

A. Sealants and Primers - General: Provide only products having lower volatile organic compound (VOC) content than required by SCAQMD 1168.

1. Architectural Sealants: 250 g/L.

2. Sealant Primers for Nonporous Substrates: 250 g/L.

3. Sealant Primers for Porous Substrates: 775 g/L.

B. Paints and Coatings: Provide wood finishes, coatings primers and sealers having lower volatile organic compound (VOC) content than required by SCAQMD 1113.

1. Floor Sealers and Finish Coats: VOC content of not more than 275 g/L.

2. Game-Line and Marker Paint: VOC content of not more than 500 g/L.

2.03 WOOD FLOORING

A. Strip Flooring: Northern hard maple (Acer saccharum), kiln dried, random length, tongue and groove, and end matched.

1. Grade: MFMA-RL Second and Better.

2. Thickness: 25/32 inch.

3. Face Width: 2-1/4 inches.

4. Provide continuous incremental expansion - factory milled.

5. Preservative Treatment: Clear, penetrating, water-repellent wood preservative that protects against mold, mildew, staining, and decay fungi; complying with MFMA's written recommendations and applied by immersion.

2.04 SUBFLOOR SYSTEM

A. Subfloor: Minimum 15/32-inch thick, CD face, Exposure I, APA rated plywood sheathing or as recommended by flooring manufacturer.

B. Resilient Pads: Manufacturer's recommended rubber, EPDM or polyurethane pads installed at manufacturer's standard spacing for product designation indicated above. PVC pads are not acceptable.

1. Material: Manufacturer's standard.

2. Thickness: As recommended by manufacturer.

2.05 ACCESSORIES

A. Vapor Retarder: ASTM D4397, polyethylene sheet not less than 6 mils thick.

B. Thresholds: As applicable for conditions.

C. Fasteners: Type and size recommended by manufacturer, but not less than those recommended by MFMA for application indicated.

D. Trowelable Leveling and Patching Compound: Portland-cement-based formulation approved by athletic floor manufacturer.

E. Floor-Finish System: System of compatible components recommended in writing by flooring manufacturer and MFMA approved.

1. Type: MFMA Group 5, Water Based Finishes; polyurethane, unless otherwise recommended by flooring manufacturer.

2. Game-Line and Marker Paint: Industrial enamel compatible with finish coats and recommended in writing by manufacturers of finish coats and paint for this use.

3. Available Floor Finish Products:

a. BonaSport Super Sport HD manufactured by Bona: www.bona.com.

b. 1907 Gym Finish over Basecoat II manufactured by Hillyard, Inc: www.hillyard.com.

c. SikaFloor WP-36 Waterbased Acrylic Modified Aliphatic Urethane manufactured by Sika Corporation: www.sikafloorusa.com.

d. Substitutions: Section 01 60 00 - Product Requirements.

PART 3 EXECUTION 3.01 EXAMINATION

A. Examine substrates, areas and conditions, with Installer present, for compliance with requirements for maximum moisture content, installation tolerances, and other conditions affecting performance of athletic floor assemblies.

1. Proceed with installation only after unsatisfactory conditions have been corrected.

B. Concrete Slabs: Verify that concrete slabs comply with requirements specified in Section 03 30 00 - Cast-in-Place Concrete.

1. Moisture Testing: Perform tests in accordance with ASTM F1869, unless otherwise recommended by manufacturer. Proceed with installation only after substrates pass testing.

2. Relative Humidity Testing (In-Situ Probe Test): Perform tests in accordance with ASTM F2170. Use a prepackaged relative humidity testing kit and follow the manufacturer's instructions.

a. Relative humidity level shall be 80 percent or lower before installation, unless manufacturer has more stringent requirements.

3.02 PREPARATION

A. Grind high spots and fill low spots on concrete substrates to produce a maximum 1/8-inch deviation in any direction when checked with a 10-foot straight edge.

1. Use trowelable leveling and patching compounds, according to manufacturer's written instructions, to fill cracks, holes, and depressions in substrates.

B. Broom and vacuum clean substrates to be covered immediately before product installation. After cleaning, examine substrates for moisture, alkaline salts, carbonation, or dust. Proceed with installation only after unsatisfactory conditions have been corrected.

3.03 INSTALLATION

A. General: Comply with athletic floor assembly manufacturer's written instructions, but not less than written recommendations of MFMA applicable to flooring type indicated.

B. Pattern: Lay flooring parallel with long dimension of space to be floored, unless otherwise indicated.

C. Expansion Spaces: Provide 1-1/2- to 2-inch expansion void as required by manufacturer's written instructions and MFMA's written recommendations at walls and other obstructions, and at interruptions and terminations of flooring.

1. Cover expansion spaces with vented grilles.

D. Vapor Retarder: Install vapor retarder over entire area to be covered by wood athletic flooring, with joints lapped a minimum of 6 inches and sealed. E. Assembly:

1. Attach resilient pads to underside of the first layer of plywood and 12 inches on center, unless otherwise recommended by flooring manufacturer.

2. Place the first layer of plywood diagonal or perpendicular to the intended direction of the finish flooring, allowing 1/4 inch spacing at all edges.

3. Lay the second layer of plywood without pads at the opposite 45 degree angle or at right angles to the first layer. Do not allow joints in the second layer to coincide with a joint in the first layer. Fasten layers together using manufacturer's recommended fasteners and spacing. Allow 1/4 inch between panel edges.

4. Provide 1-1/2 to 2 inch expansion space, as required by manufacturer's written instructions and MFMA's written recommendations at walls and other obstructions, and at interruptions and terminations of flooring.

5. Install strip flooring onto second layer of plywood parallel to the long dimension of the room. Provide adequate expansion at regular intervals across the floor during installation as dictated by the average humidity condition of the area according to the recommendations of the flooring manufacturer and installer.

F. Installation Tolerances: 1/8 inch in 10 feet of variance from level.

G. Vented Grilles: Install manufacturer's recommended vented grilles, using pre-fabricated mitered corners. Grilles to be Price Heavy Duty Mandrel Linear Bar Grille with removable 15A core for cleaning, 1/8” bars with ¼” 0-degree blade spacing. Flanged frame style sized appropriately to accommodate floor movement. Attach to adjacent floor surfaces to allow for movement of wood flooring system. Do not attach to wood athletic flooring. Grilles to be Owner provided and Owner installed.

H. Thresholds: Install thresholds at all transitions of wood athletic flooring to other flooring to span expansion voids and to provide an even, accessible transition.

1. Attach thresholds to adjacent floor surfaces to allow for movement of wood flooring system. Do not attach to wood athletic flooring.

3.04 SANDING AND FINISHING

A. Follow applicable recommendations in MFMA (SPEC).

B. Allow installed flooring to acclimate to ambient conditions for at least 10 days before sanding.

C. Machine sand with coarse, medium, and fine grades of sandpaper to achieve a level, smooth, uniform surface without drum stop marks, ridges, cups, gouges, streaks or shines. Remove sanding dust by tack or vacuum.

D. Finish: Apply seal and finish coats of finish system according to finish manufacturer's written instructions. Provide not less than four coats total and not less than two finish coats. Buff and vacuum or tack between each coat after it dries.

1. Water-Based Finishes: Use finishing methods recommended by finish manufacturer to reduce grain raise and sidebonding effect.

2. Game Lines and Markers: Apply game-line and marker paint between final seal coat and first finish coat according to paint manufacturer's written instructions.

a. Mask flooring at game lines and markers, and apply paint to produce lines and markers with sharp edges.

b. Where game lines cross, break minor game line at intersection; do not overlap lines.

c. Apply game lines and markers in widths and colors according to requirements of Oregon School Activities Association (OSAA) and National Federation of State High School Association.

d. Apply finish coats after game-line and marker paint is fully cured.

E. School Mascot, Initials or Logo: Provide layout of graphics and painting the center court circle. Allow for maximum of 6 colors and shades of paint. Line work and graphics to replicate school mascot in detail, scaled to fit inside the circle.

1. Graphics will be provided in digital format by Owner.

3.05 PROTECTION

A. Protect athletic floors during remainder of construction period to allow finish to cure and to ensure that flooring and finish are without damage or deterioration at time of Substantial Completion.

1. Do not cover athletic floors after finishing until finish reaches full cure, and not before seven days after applying last finish coat.

2. Do not move heavy and sharp objects directly over athletic floors. Protect fully cured floor finishes and surfaces with plywood or hardboard panels to prevent damage from storing or moving objects over athletic floors.

END OF SECTION

Printed 2/6/2019

Printed 2/6/2019 Falls City School District May 2022 Falls City Elementary School Gymnasium