D-Blaze

D-Blaze® Fire Retardant Treated Wood

D-Blaze® fire-retardant treated wood (FRTW) is highly effective at controlling the spread of flame and smoke, increasing evacuation time and potentially reducing damages and repair costs caused by fire. D-Blaze FRTW slows the combustion cycle of fire by forming a protective layer of char, hindering flame spread and smoke formation.

Tested and listed by Underwriters Laboratories® (UL® and ULC®), D-Blaze FRTW meets the requirements of construction materials as set forth in all North American building codes. During the code required 30-minute flame and smoke test; UL 723 (ASTM E84), D-Blaze FRTW shows no evidence of significant progressive combustion.

D-Blaze is recognized as a code compliant pressure-impregnated fire-retardant treatment under the International Building Code® (IBC®), International Residential Code® (IRC®) and the National Building Code of Canada® (NBC®) for lumber and plywood products used in fire rated assemblies and interior applications where fire retardant construction materials are permitted and specified by the building codes.

Acceptable for use in sensitive environments such as schools, healthcare facilities, hotels and multi-family construction projects, D-Blaze received GREENGUARD® Gold certification for meeting some of the world’s most comprehensive standards for low emissions of volatile organic compounds (VOCs) into indoor air.

Backed by a 50-Year Limited Warranty, D-Blaze FRTW is protected against structural failure due to strength loss caused by high temperature and high humidity conditions. (See Warranty for details.)

D-Blaze FRTW products are fire resistant, durable, non-hygroscopic, non-blooming, easy to handle, workable with common wood working tools, and offers a lower in-place cost than materials classified as non-combustible. D-Blaze FRTW has been used in projects across North America, including the One World Trade Center in New York City and Navy Pier in Chicago.

dblaze

D-Blaze® Fire Retardant Treated Wood

D-Blaze® fire-retardant treated wood (FRTW) is highly effective at controlling the spread of flame and smoke, increasing evacuation time and potentially reducing damages and repair costs caused by fire. D-Blaze FRTW slows the combustion cycle of fire by forming a protective layer of char, hindering flame spread and smoke formation.

Tested and listed by Underwriters Laboratories® (UL® and ULC®), D-Blaze FRTW meets the requirements of construction materials as set forth in all North American building codes. During the code required 30-minute flame and smoke test; UL 723 (ASTM E84), D-Blaze FRTW shows no evidence of significant progressive combustion.

D-Blaze is recognized as a code compliant pressure-impregnated fire-retardant treatment under the International Building Code® (IBC®), International Residential Code® (IRC®) and the National Building Code of Canada® (NBC®) for lumber and plywood products used in fire rated assemblies and interior applications where fire retardant construction materials are permitted and specified by the building codes.

Acceptable for use in sensitive environments such as schools, healthcare facilities, hotels and multi-family construction projects, D-Blaze received GREENGUARD® Gold certification for meeting some of the world’s most comprehensive standards for low emissions of volatile organic compounds (VOCs) into indoor air.

Backed by a 50-Year Limited Warranty, D-Blaze FRTW is protected against structural failure due to strength loss caused by high temperature and high humidity conditions. (See Warranty for details.)

D-Blaze FRTW products are fire resistant, durable, non-hygroscopic, non-blooming, easy to handle, workable with common wood working tools, and offers a lower in-place cost than materials classified as non-combustible. D-Blaze FRTW has been used in projects across North America, including the One World Trade Center in New York City and Navy Pier in Chicago.

dblaze

D-Blaze® is recognized as a code compliant pressure-impregnated fire-retardant treatment under the International Building Code® (IBC®), International Residential Code® (IRC®) and the National Building Code of Canada® (NBC®) for lumber and plywood products used in fire rated assemblies and interior applications where fire retardant construction materials are permitted and specified by the building codes.

APPLICATIONS

D-Blaze® treated lumber can be used in these applications:

  • Walls and Wall Assemblies: load-bearing & partition, plywood sheathing and studs
  • Roofs and Attics: trusses, plywood sheathing, decks and rafters
  • Flooring: subfloors, joists, plywood sheathing, studs and trusses
  • Other structural uses: stairways, steps, beams, blocking, and paneling

Approvals and Listings

D-Blaze® FRTW meets or exceeds the guidelines for testing construction materials as set forth and/or established by the following authorities and specifications:

  • Underwriters Laboratories® United States (UL®):
    • Listed and Classified: FRT Lumber, FRT Plywood and FRTW as a component of assemblies
    • FR-S Rating for low smoke and flame development indexes of less than 25.
  • Underwriters Laboratories® of Canada (ULC®)
    • CAN/ULC-S102: Surface Burning Characteristics of Building Materials and Assemblies
    • CAN/ULC-S102.2: Surface Burning Characteristics of Flooring, Floor Covering and Miscellaneous Materials and Assemblies
  • US Building Code Compliant Pressure-Impregnated FRTW 
    • 2015, 2012, 2009 & 2006 International Building Code (IBC)
    • 2015, 2012, 2009 & 2006 International Residential Code (IRC)
  • Canadian Building Code Compliant Pressure-Impregnated FRTW 
    • 2015 National Building Code of Canada (NBC)
  • National Fire Protection Association (NFPA 255)
  • City of Los Angeles: LA RR 24502
    • ICC-ESR 2645 (Retained for the City of Los Angeles)
  • California State Fire Marshal Building Materials Listings (CSFM BML)
    • Listings for D-Blaze Plywood and Lumber
  • New York City Building Code (MEA Numbers 406-87 and 407-87)
  • American Wood Protection Association (AWPA)
    • P50, U1, UCFA for interior Type A High Temperature (HT)
  • GREENGUARD Gold Certified
    • No VOC’s and No Formaldehyde

This product has been approved by the California State Fire Marshal (CSFM) pursuant to Section 13144.1 of the California Health and Safety Code. See CSFM Building Material Listing (BML) Numbers: Plywood: 2580-2080-0100 & Treated Lumber: 2580-2080-0101 for allowable values and/or conditions for use concerning material presented in this document. (CSFM BML is subject to re-examination, revision and possible cancellation.) 

Structural Properties

Structural Properties

D-Blaze FRTW has been tested by independent laboratories following industry standards ASTM D 5516 & ASTM D 5664 to develop strength reduction factors for various use conditions, including roof temperatures of up to 150° F for lumber and 170° F for plywood. Consult the Data Tables in the D-Blaze Technical Specifications Brochure for more information. Table 1 (D-Blaze Lumber Strength Design Adjustment Factors) and Table 2, 3 and 4 (D-Blaze Plywood Span Rating Adjustments) for specific adjustment factors.

How to Specify D-Blaze® FRT Lumber and Plywood

To assure structural integrity in roof areas of high temperature and humidity, D-Blaze span and strength design adjustment factors have been determined by independent third parties in accordance with ASTM D 5516 for plywood and ASTM D 5664 for lumber. Extended specifications can be found at www.ARCAT.com.

All D-Blaze FRT lumber and plywood:

  • shall be pressure-treated with D-Blaze® fire retardant to meet Underwriters Laboratories FR-S rating or a flame spread and smoke index rating denoting a surface-burning characteristic rating of 25 or less for flame spread and smoke developed.
  • shall bear the Underwriters Laboratories label or stamp attesting to the FR-S rating or flame spread and smoke index rating, and to the fact that it also meets the American Wood Protection Association (AWPA) P50, U1, UCFA for interior Type A (HT) use.
  • shall be kiln-dried to a maximum moisture content of 19% for lumber and 15% for plywood.
  • shall be kept dry at all times during transit, job site storage and construction.

*Note: Designer may wish to specify lower moisture content for cabinet and millwork.

All structural design calculations shall be based on the Strength Design Factor Tables as published in D-Blaze Technical Specifications brochure.

Standardized 3-part specifications 

D-Blaze FRTW CSI 3-part and Canadian CSC architectural specs are available at www.ARCAT.com

Continuing Education Units (CEU)

Architects, specifiers, and designers can learn more by taking a Continuing Education course on FRTW sponsored by Viance and provided by Ron Blank Associates.

Testing

  • ASTM E 84: Standard Test Method for Surface Burning Characteristics of Building Materials extended for an additional 20 minutes. (30-minute test duration)
  • ASTM D 3201: Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Based Products
  • ASTM D 5516: Standard Test Method for Evaluating the Flexural Properties of Fire-Retardant Treated Softwood Plywood Exposed to Elevated Temperatures
  • ASTM D 5664: Standard Test Method for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures on Strength Properties of Fire-Retardant Treated Lumber

DATA TABLES

Strength design adjustment factors for D-Blaze® fire retardant lumber compared to untreated lumber

PROPERTY

SERVICE TEMPERATURE

< 100 ºF (38 ºC)

D-BLAZE® LUMBER ROOF FRAMING,CLIMATE ZONE1,2

1A 1B 2
Compression Parallel, Fc 0.935 0.935 0.935 0.935
Horizontal Shear 0.985 0.838 0.894 0.964
Tension Parallel 0.874 0.625 0.775 0.905
Bending: Modulus of Elasticity, E 1.000 0.977 0.986 0.997
Bending: Extreme Fiber Stress, Fb 0.972 0.740 0.828 0.939
Fasteners/Connectors 0.900 0.900 0.900 0.900

 1Climate Zone definition:

Zone 1 – Minimum design roof live load or maximum ground snow load ≤ 20 psf (960 Pa)

Zone 1A – SouthWest Arizona, South East Nevada (area bounded by Las Vegas- Yuma- Phoenix- Tucson)

Zone 1B – All other qualifying areas of the United States Zone 2 – Maximum ground snow load ≥ 20 psf (960 Pa) 2Duration of load adjustments for snow loads, 7-day (construction) loads, and wind loads as given in the National Design Specifications for Wood Construction apply.

Span ratings for D-Blaze® fire retardant southern pine plywood for roof sheathing applicable at a temperature up to 170º F (77ºC)/ based on uniform loading, two span construction and L/180 deflection limit

PLYWOOD THICKNESS (INCHES)

D-BLAZE® 1,2,3,4,5,8,9,10,11,12,13 PLYWOOD ROOF SHEATHING SPAN RATINGS USED AT TEMPERATURES > 100° F AND <170° F

CLIMATE ZONE6,7
1A 1B 2
3/8 (0.375) 20 20 20
15/32 (0.469) 24 24 24
1/2 (0.500) 24 24 24
19/32 (0.594) 32 32 32
5/8 (0.625) 32 32 32
23/32 (0.719) 40 32 40
3/4 (0.750) 40 32 40
7/8 (0.875) 40 40 40
1 (1.000) 48 48 48
1 1/8 (1.125) 48 48 48

Span ratings for D-Blaze® fire retardant douglas fir and other species plywood for roof sheathing applicable at a temperature up to 170º F (77ºC)/ based on uniform loading, two span construction and L/180 deflection limit

PLYWOOD THICKNESS (INCHES)

D-BLAZE® 1,2,3,4,5,8,9,10,11,12,13 PLYWOOD ROOF SHEATHING SPAN RATINGS USED AT TEMPERATURES > 100° F AND <170° F

CLIMATE ZONE6,7
1A 1B 2
3/8 (0.375) 16 16 20
15/32 (0.469) 20 20 24
1/2 (0.500) 20 20 24
19/32 (0.594) 24 24 32
5/8 (0.625) 24 24 32
23/32 (0.719) 32 32 32
3/4 (0.750) 32 32 32
7/8 (0.875) 40 32 40
1 (1.000) 40 40 48
1 1/8 (1.125) 48 40 48

Notes for Tables 2 and 3:

SI Units Conversion: 1 inch = 25.4 mm, 1 psf = 48 N/m2

1 All loads are based on two-span condition with panels 24 inches wide or wider, strength axis perpendicular to supports.

2 Fastener size and spacing must be as required in the applicable building code for untreated plywood of the same thickness.

3 Roof spans and loads apply to roof systems having the minimum ventilation areas required by the applicable building code. Fifty percent of required vent area must be located on upper portion of sloped roofs to provide natural air flow.

4 For low-sloped or flat roofs with membrane or built-up roofing having a perm rating less than 0.2, use rigid insulation having a minimum R value of 4.0 between sheathing and roofing, or use next thicker panel than tabulated for the span and load (e.g., 19/32 for 24 inches, 23/32 for 32 inches); and use a continuous ceiling air barrier and vapor retarder with a perm rating less than 0.2 on the bottom of the roof framing above the ceiling finish.

5 For unblocked roof diaphragms panel edge clips are required for roof sheathing: one midway between supports for 24-inch and 32-inch spans, two at 1/3 points between supports for 48-inch span. Clips must be specifically manufactured for the plywood thickness used.

6 Tabulated loads for Zone 1A are based on a duration of load adjustment for 7-day (construction) loads of 1.25. Tabulated loads for Zone 1B and Zone 2 are based on a duration of load adjustment for snow of 1.15. All values within the table are based on a dead load (DL) of 8 psf. If the DL is less than or greater than 8 psf, the tabulated live load may be increased or decreased by the difference. Applicable material weights, psf: asphalt shingles – 2.0, 1/2-inch plywood – 1.5, 5/8-inch plywood – 1.8, 3/4-inch plywood – 2.2.

7 Climate Zone definition:

ZONE 1 – Minimum design roof live load or maximum ground snow load ≤ 20 psf (960 Pa)

ZONE 1A – SouthWest Arizona, South East Nevada (area Bounded by Las Vegas- Yuma- Phoenix- Tucson)

ZONE 1B – All other qualifying areas of the United States

ZONE 2 – Maximum ground snow load ≥ 20 psf (960 Pa)

8 D-Blaze treated plywood must not be used as roof sheathing if a radiant shield is used beneath the roof sheathing.

9 The 19/32-inch and 5/8-inch thickness are limited to performance rated 4-ply or 5-ply. 23/32- and 3/4-inch thicknesses are limited to performance rated 5-ply or 7-ply.

10 Deflection of roof sheathing at tabulated maximum live load is less than 1/240 of the span, and under maximum live load plus dead load is less than 1/180 of the span.

11 Staples used to attach asphalt shingles must be minimum 15/16-inch crown and minimum 1-inch leg, or otherwise comply with the applicable code, with the quantity of fasteners adjusted in accordance with Table 1 of this report.

D-Blaze® Treated Plywood Sub-floor Allowable Spans (Inches) used at Temperatures < 100º F (38º C)

PLYWOOD THICKNESS (INCHES)

SOUTHERN PINE

DOUGLAS FIR

Allowable Span (Inches)1,2 Allowable Span (Inches)1,2
3/8 (0.375) 16 12
15/32 (0.469) 16 16
1/2 (0.500) 16 16
19/32 (0.594) 19.2 19.2
5/8 (0.625) 19.2 19.2
23/32 (0.719) 24 24
3/4 (0.750) 24 24
7/8 (0.875) 24 24
1 (1.000) 32 32
1 1/8 (1.125) 32 32

SI Units Conversion: 1 inch = 25.4 mm, 1 psf = 48 N/m2

1 Uniform live load = 100 psf and Dead load = 10 psf, LL deflection ≤ L/360, LL+ DL deflection ≤L/240

2 Fastener size and spacing must be as required in the applicable building code for untreated plywood of the same thickness.

Proper roof system ventilation shall be used to provide a uniform flow of air over all interior surfaces of the plywood to prevent heat build-up and sufficient to effectively remove moisture where the roof is warmed by solar radiation.

The following species are building code compliant and listed by UL with an FR-S rating when treated with D-Blaze

D-BLAZE LUMBER AND PLYWOOD APPROVED SPECIES

Softwood Lumber

  • Jack Pine
  • Lodgepole Pine
  • Ponderosa Pine
  • Southern Yellow Pine
  • Red Pine
  • Alpine Fir
  • Balsam Fir
  • Douglas Fir
  • Hem-Fir
  • Spruce-Pine-Fir (SPF)
  • White Fir
  • Western Hemlock
  • Black Spruce
  • Englemann Spruce
  • Red Spruce
  • White Spruce

Plywood

Hardwood Lumber

  • Douglas Fir
  • Lauan
  • Red Pine
  • Southern Yellow Pine
  • Basswood
  • Red Oak

NOTE: From time to time, additional species will be tested. Check with your supplier if the species desired are not shown.

NOTABLE PROJECTS

D-Blaze® FRTW has been installed in many notable projects including the new One World Trade Center in NYC, the Sears Tower and Navy Pier in Chicago.

  • Backed by a 50-Year Limited Warranty, D-Blaze® FRTW is protected against structural failure due to strength loss caused by high temperature and high humidity conditions.
  • Acceptable for use in sensitive environments such as schools, healthcare facilities, hotels and multi-family construction projects, D-Blaze® received GREENGUARD® Gold certification for meeting some of the world’s most comprehensive standards for low emissions of volatile organic compounds (VOCs) into indoor air.
  • GREENGUARD Gold Certification Information
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