Section 09 64 66 Wood Athletic Flooring.pdf

CONVERT B32, BAYS F-G FOR FITNESS CENTER W91236-19-R-0023

DEFENSE SUPPLY CENTER RICHMOND (DSCR)

SECTION 09 64 66

WOOD ATHLETIC FLOORING

08/16

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN WOOD PROTECTION ASSOCIATION (AWPA)

AWPA C1 (2003) All Timber Products - Preservative Treatment by Pressure Processes

AWPA C2 (2003) Lumber, Timber, Bridge Ties and Mine Ties - Preservative Treatment by Pressure Processes

AWPA M4 (2015) Standard for the Care of Preservative-Treated Wood Products

ASTM INTERNATIONAL (ASTM)

ASTM D2103 (2015) Standard Specification for Polyethylene Film and Sheeting

ASTM D2240 (2015; E 2017) Standard Test Method for Rubber Property - Durometer Hardness

ASTM D395 (2016; E 2017) Standard Test Methods for Rubber Property - Compression Set

ASTM D412 (2016) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension

ASTM E96/E96M (2016) Standard Test Methods for Water Vapor Transmission of Materials

ASTM F2170 (2019) Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes

CALIFORNIA DEPARTMENT OF PUBLIC HEALTH (CDPH)

CDPH Standard Method v1.1 (2010; Version 1.1) Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources using Environmental Chambers

CARPET AND RUG INSTITUTE (CRI)

CRI GL CUSHION Green Label Cushion Program

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AMENDMENT 001

MAPLE FLOORING MANUFACTURERS ASSOCIATION (MFMA)

MFMA AFSFSCL (2016) Athletic Floor Sealer and Finish Specifications and Conformance List #35

MFMA GRHM (2000) Grading Rules for MFMA Northern Hardwood Maple

MFMA SSCLFMGF (2016) Sanding, Sealing, Court Lining, Finishing and Resurfacing of Maple Gym Floors

RESILIENT FLOOR COVERING INSTITUTE (RFCI)

FLOORSCORE FLOORSCORE IAQ Certification

SCIENTIFIC CERTIFICATION SYSTEMS (SCS)

SCS SCS Global Services (SCS) Indoor Advantage

SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT (SCAQMD)

SCAQMD Rule 1113 (2016) Architectural Coatings

SCAQMD Rule 1168 (2017) Adhesive and Sealant Applications

UNDERWRITERS LABORATORIES (UL)

UL 2818 (2013) GREENGUARD Certification Program For Chemical Emissions For Building Materials, Finishes And Furnishings

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance with Section 01 33 29 SUSTAINABILITY REPORTING.

Submit the following in accordance with Section 01 33 00.00 50 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Hardwood Strip Flooring System

Clearly delineate components of the system. Show location of anchor plate assemblies, floor outlets, and underfloor conduit or raceway location; flooring system details; and flooring abutting other construction. Accessories shall be approved by the flooring manufacturer.

SD-03 Product Data

Hardwood Strip Flooring Components

Indoor Air Quality for Seal Coat and Finish Coat Materials ; S

Indoor Air Quality for Game Line Marking Materials ; S

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Indoor Air Quality for Adhesives ; S

SD-04 Samples

Strip Flooring ; G

Molded-Rubber Base ; G

Cushions and Pads

Sleepers and Nailers

SD-06 Test Reports

Preservative Treatment

SD-08 Manufacturer's Instructions

Flooring System

Adhesive for Membrane Installation

Submit flooring system manufacturer's installation instructions. Submit vaporproofing manufacturer's written recommendations for adhesives to be used in membrane installation.

SD-10 Operation and Maintenance Data

Hardwood Strip Flooring , Data Package 1;

1.3 CERTIFICATION

1.3.1 Indoor Air Quality Certification

Submit required indoor air quality certifications in one submittal package.

1.3.1.1 Floor Covering Materials

Provide wood strip flooring and molded rubber base products certified to meet indoor air quality requirements by FLOORSCORE, UL 2818 (Greenguard) Gold, SCS Global Services Indoor Advantage Gold or provide certification or validation by other third-party program that products meet the requirements of this Section. Provide rubber cushions and pads products certified to meet indoor air quality requirements by FLOORSCORE, UL 2818 (GreenGuard) Gold, SCS Global Services Indoor Advantage Gold, CRI GL CUSHION or provide certification or validation by other third-party program that products meet the requirements of this Section. Provide current product certification documentation from certification body. When product does not have certification, provide validation that product meets the indoor air quality product requirements cited herein.

1.4 DELIVERY, STORAGE, AND HANDLING

Deliver materials to the building site in original unopened packages, bundles, or containers. Protect materials against dampness during shipment and after delivery. Store material under cover in a well-ventilated building. Prevent exposure to extreme changes of

SECTION 09 64 66 Page 3 temperature and humidity. Do not store materials in building under construction until wet-applied building materials are dry. Store flooring in accordance with MFMA GRHM, under adequate and controlled ventilation and under approved temperature and humidity conditions at the location where it is to be laid for at least seven days before installation.

Handle and store preservative-treated materials in accordance with AWPA M4.

1.5 ENVIRONMENTAL CONDITIONS

For at least one week prior to and during installation, in the location to receive finish flooring and the location where flooring will be stored, maintain a temperature of between 55 and 80 degrees F , and a relative humidity of between 35 and 50 percent. When the interior relative humidity exceeds 50 percent during or after installation of flooring, sanding and finishing of flooring shall be delayed for two to three weeks after completion of laying, unless directed otherwise. Provide adequate ventilation during the entire sealing and finishing process to ensure that no unhealthy or hazardous accumulation of vapors occurs. Ensure that environmental conditions are met.

PART 2 PRODUCTS

2.1 HARDWOOD STRIP FLOORING SYSTEMS ON CONCRETE SLAB

2.1.1 Wood Sleepers with Rubber Cushions- WDF-2 (Raquetball Court)

Provide flooring system consisting of hardwood strip flooring nailed to one layer of plywood subflooring seated on wood sleepers that are attached to rubber cushions and anchored to the concrete slab using 2 1/4" spike anchors and plastic anti-squeak sleeves.

2.1.2 Plywood Subflooring with Rubber Pads-WDF-1 (Gym)

Provide flooring system consisting of hardwood strip flooring nailed to two-layer plywood subflooring that is seated on cushioned pads resting on the concrete floor slab.Rubber cushions and pads to have a durometer hardness of 60.

2.1.3 Plywood Subflooring with Rubber Pads-WDF-3 (Aerobics)

Provide flooring system consisting of hardwood strip flooring nailed to two-layer plywood subflooring that is seated on cushioned pads resting on the concrete floor slab. Rubber cushions and pads to have a durometer hardness of 50.

2.2 MATERIALS

2.2.1 Strip Flooring

WDF-1 Gym: Second and better grade hard maple graded in accordance with current MFMA GRHM. Flooring must be 25/32 inch thick by 2 1/4 inches , unfinished kiln dried, continuous tongue-and-groove, end-matched and continuous strip XL plus.

WDF-2 Raquetball: Second and better hard maple graded in accordance with current MFMA GRHM. Flooring must be 25/32 inch thick by 2-1/4 inches, presanded, kiln dried, tongue and groove on side-match and end-match and continuous strip XL.

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WDF-3 Aerobics: Second and better hard maple graded in accordance with current MFMA GRHM. Flooring must be 25/32 inch thick by 2-1/4 inches, factory finished, kiln dried, tongue and groove, end-match and continuous strip XL.

Provide wood products with no added urea-formaldehyde resins. Each bundle of flooring must be clearly grade stamped. Moisture content of strip flooring must not exceed 8 percent at time of arrival on job site and must be allowed to acclimate in accordance with paragraph DELIVERY, STORAGE, AND HANDLING.

Products must meet emissions requirements of CDPH Standard Method v1.1 .

2.2.2 Molded-Rubber Base -RB-3

4 inch vertical leg by 3 inch , designed to allow ventilation under floor with premolded outside corners and mitered inside corners, and as recommended by flooring manufacturer. Products must meet emissions requirements of CDPH Standard Method v1.1 .

2.2.3 Rubber Cushions and Pads

Rubber cushions and pads must have a durometer hardness of 60 for WDF-1 and 50 for WDF-3, plus or minus 5, when tested in accordance with ASTM D2240 and must have a minimum tensile strength of 1500 psi , when tested in accordance with ASTM D412. For WDF-2, 7/16" pads with a durometer hardness of 60 that have been factory drilled and assembled to sleeper. When subjected to an aging period of 70 hours and exposed to a temperature of 158 degrees F , allowed to cool to room temperature over a period of 4 hours and retested, tested specimen must have a change in hardness of 10 points maximum, a change in tensile strength of minus 25 percent maximum and a change in ultimate elongation of minus 25 percent maximum in accordance with the applicable test methods referenced above.

Test rubber cushions, under a load of 40 psi , in accordance with ASTM D395, Method A. Size of tested specimen must be 2 1/4 by 3 by 3/8 inch . Length of testing time must be 22 hours; temperature of test must be 158 degrees F .

Test specimen must recover, without set or displacement. Products must meet emissions requirements of CDPH Standard Method v1.1 .

2.2.4 Polyethylene Vaporproofing Membrane (for WDF-2, Raquetball)

ASTM D2103 Type 21110. Minimum thickness shall be 6 mils . Perm rating must not exceed 0.02 when tested in accordance with ASTM E96/E96M.

2.2.5 Moisture Barrier for WDF-1, Gym & WDF-3, Aerobics

Rolled cementitious moisture barrier. Provides protection for 100% RH, against pH 12, resistant to mold & fungus.

a. Roll Size: 5’ x 144’ (720 sq. G.)

b. Minimum Basic Weight: 12.5 lbs. per 100 sq. G. ASTM D2646

c. Minimum Thickness: 28.0 mils ASTM D5729

d. Permeance: 0.044 (grain h¯¹ G¯² in Hg¯ ¹) ASTM E96

e. Maximum PH Allowed: 12

f. Fungi and Mold Resistance: Does not sustain mold growth ASTM G21-15

g. VOC: Zero VOC product ASTM D5197

h. Formaldehyde: Passes ASTM D5197

i. Flammability: Passes ASTM D2859-96

j. Dimensional Stability; Passes ASTM D7570

k. Radiant Panel: Passes ASTM E648-10

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l. Smoke Density: Passes NFPA 258

m. Residual Indentation: Passes ASTM F970

2.2.6 Sleepers and Nailers

7/8" thick plywood sleeper, Spruce, Pine or Fir or per manufacturer's recommendations . Moisture content must not exceed 15 percent. Provide preservative treatment in accordance with AWPA C1 AWPA C2. Identify treatment on each piece of material by the quality mark of an agency accredited by the Board of Review of the American Lumber Standard Committee. Brush coat exposed areas that are cut or drilled after treatment with the same preservative in accordance with AWPA M4.

2.2.7 Plywood Subflooring 15/32 inch thick, 4 feet by 8 feet , CDX, Exposure 1, APA Rated Sheathing. Spruce, Pine or Fir or per manufacturer's recommendations.

2.2.8 Sealing and Finishing for Hardwood Strip Flooring

Provide oil-modified or water-based sealer and finish as recommended by wood flooring manufacturer and approved by MFMA.

Conform to MFMA AFSFSCL, Group III finish for WDF-1 and WDF-2. Seal coat and finish coat materials must be compatible with each other. Provide seal coat and finish coat products meeting either emissions requirements of CDPH Standard Method v1.1 (limit requirements for either office or classroom spaces regardless of space type) or VOC content requirements of SCAQMD Rule 1113 . Provide validation of indoor air quality for seal coat and finish coat materials .

2.2.9 Game Line Marking Materials

As recommended by wood flooring finish manufacturer and compatible with the finish. Provide game line marking products meeting either emissions requirements of CDPH Standard Method v1.1 (limit requirements for either office or classroom spaces regardless of space type) or VOC content requirements of SCAQMD Rule 1113 . Provide validation of indoor air quality for game line marking materials .

2.2.10 Nails

Shape and size as recommended by flooring manufacturer.

2.2.11 Adhesives

Waterproof, suitable for use with molded rubber base, recommended by rubber base manufacturer. Provide adhesive products meeting either emissions requirements of CDPH Standard Method v1.1 (limit requirements for either office or classroom spaces regardless of space type) or VOC content requirements of SCAQMD Rule 1168 . Provide validation of indoor air quality for adhesives .

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Condition of Subfloors

Do not install flooring on surfaces that are not suitable for proper

SECTION 09 64 66 Page 6 installation. Before beginning work under this section, correct defects such as rough or scaling concrete, low spots, high spots, uneven surfaces, and repair damaged portions of concrete slabs. Concrete slabs must be given a leveling course of latex fill and the surface shall not vary more than 1/8 inch when measured with a 10 foot straightedge placed in any direction.

3.1.2 Preparation of Concrete Slab

Sweep concrete floor. Ensure that slab is dry and clean. Remove paint spots, plaster, masonry droppings, grease, dirt, and other foreign matter including chemical curing agents which may affect the bond of adhesive-applied wood flooring systems. Concrete must be fully cured and dry.

3.1.3 Work of Other Trades

Do not start work specified under this section until work of trades which could create moisture, has been completed.

Amendment 001**************************************************************

3.1.4 Moisture Content

Check flooring, subflooring, sleepers and nailers with an approved meter verifying conformance with the requirements specified hereinbefore.

Moisture content of the concrete slab shall not exceed 85 percent using ASTM F2170 In-Slab Relative Humidity test.

Conduct two relative humidity tests at each location in each bay designated to receive flooring in accordance with ASTM F2170. Conduct the first ASTM F2170 relative humidity test at the beginning of work in a bay and before the HVAC is turned off. Conduct a second ASTM F2170 relative humidity test just prior to floor finish installation and after the HVAC is turned back on and the bay is dehumidified to determine any changes in the relative humidity of the slab since the first test.

****************************************************************Amendment 001

3.2 INSTALLATION

Do not install building construction materials that show visual evidence of biological growth.

3.2.1 Vaporproofing For Slabs on Grade

Cover slab with the polyethylene membrane or moisture barrier. Lap joints at least 6 inches and turn up walls 4 inch . Seal joints with a full coverage of the adhesive recommended by the membrane manufacturer.

3.2.2 Flooring on Wood Sleepers with Rubber Cushions (WDF-2)

3.2.2.1 Installation of Wood Sleepers With Rubber Cushions

Install per flooring manufacturer's recommendations.

1. Install sleepers end to end at right angles to finished flooring.

SECTION 09 64 66 Page 7

Sleepers shall be staggered with rows spaced 16 1/16 inch on center or sleeper/ subfloor system. Allow for a 1/4 inch gap between sleepers.

Provide 1 1/2 inch to 2 inch expansion void at the perimeter and all vertical obstructions.

2. Properly anchor sleepers using Posi-Anchors 3 per sleeper.

Maintain a 2 inch minimum expansion void at all walls and other permanent vertical obstructions.

3. Install solid blocking at doorways, under bleachers in the stacked position, and below portable goals.

4. Install Bleacher Blocking per manufacturer’s recommendations.

5. Install 15/32 inch sub-flooring with the 8ft dimension parallel to the sleepers staggering panels in adjacent rows. Fasten plywood subfloor to sleepers using 1 1/4 inch staples placed 6 inch on center along each sleeper. Allow for a 1/4 inch gap between sheets.

3.2.2.2 Laying of Finished Flooring

Install per flooring manufacturer's recommendations.

1. Machine nail maple finish flooring 10 inch to 12 inch O.C. with end joints properly driven up and proper spacing provided for humidity conditions in specific regions. Consult flooring manufacturer's rep.

Provide 2 inch expansion voids at the perimeter and at all vertical obstructions.

3.2.3 Flooring on Plywood Subflooring With Rubber Pads(WDF-1 & WDF-3)

3.2.3.1 Installation of Plywood Subflooring With Rubber Pads

Install per flooring manufacturer's recommendations.

1. Install pads per manufacturer’s recommendations.

2. Install the lower subfloor perpendicular to the intended finish flooring direction. All joints shall be staggered 4 feet and spaced 1/4 inch apart.

3. Install solid blocking at doorways, under bleachers in the stacked position, and below portable goals.

4. Install Bleacher Blocking per manufacturer’s recommendations.

5. Install the upper subfloor diagonal to the lower subfloor panels staggering joints 4 feet and spacing 1/4 inch apart. Secure these panels using adhesive (Box X pattern) and 1 inch staples placed 6 inch O.C. at panel perimeter and 12 inch O.C. throughout interior.

3.2.3.2 Laying of Finished Flooring

Install per flooring manufacturer's recommendations.

1. Machine nail maple finish flooring 10 inch to 12 inch O.C. with end joints properly driven up and proper spacing provided for humidity conditions in specific regions. Consult flooring manufacturer's rep.

Provide 2 inch expansion voids at the perimeter and at all vertical

SECTION 09 64 66 Page 8 obstructions.

3.2.4 Molded-Rubber Base Installation

Install molded-rubber base firmly on perimeter walls in continuous adhesive as recommended by the base manufacturer. Provide vertical, circular or semicircular vent holes in base spaced 5 inches on center in a straight row. Do not fasten base to flooring.

3.3 SANDING, FINISHING, AND MARKING

3.3.1 Sanding

Sand per manufacturer’s recommendations. After sanding, buff entire floor using 100 grit screen or equal grit sandpaper, with a heavy-duty buffing machine. Inspect entire area of floor to insure the floor presents a smooth surface without drum stop marks, gouges, streaks or shiners.

Vacuum and/or tack floor before first coat of seal. Floor should be clean and completely free of dirt and sanding dust. Do not walk on floors thereafter until finish has been applied and is dry.

3.3.2 Finishing

Finish per manufacturer's recommendations. Finish floors in accordance with MFMA SSCLFMGF. Four Coat Specification: Group II finish must consist of one sealer coat and three finish coats. Group III finish must consist of two sealer coats and two finish coats. Allow 5 days for proper curing.

3.3.3 Marking

Apply game lines accurately after the buffing and vacuuming the coated surfaces. Layout in accordance with drawings, masking edges to provide sharp, clean edges. Edge must be straight and width shall be uniform.

Apply marking of colors indicated, providing a minimum dry film thickness of one mil. For game lines, use current rules of association having jurisdiction. Lines shall be straight with sharp edges in colors selected by architect.

3.4 PROTECTION

After completion of laying, finishing, and marking of the flooring, do not use the floor for at least 72 hours. Avoid heavy traffic on the floor for at least one week. Upon floor drying, use nonstaining, porous building paper of the type and grade recommended by manufacturer, taped along edges. Remove kraft paper covering after work in this area is completed.

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SECTION 09 64 66 Page 10

3.2.4 Molded-Rubber Base Installation

3.4 PROTECTION