D-Blaze^® fire retardant treated wood is available for interior applications where fire retardant construction materials are specified by building codes. D-Blaze^® treated lumber and plywood is highly effective in controlling the spread of flame, smoke and devastation caused by fire.

D-Blaze^® treated products show no evidence of significant progressive combustion at 30 minutes exposure to flame. In most applications, D-Blaze^® treated products offer a lower in-place cost than noncombustible classified materials.

Product features

Fire retardant
Durable
Low-corrosive
Low-hygroscopicity
Non-blooming
No VOC’s or Formaldehyde
Paintable
Stainable
Easy to handle
Workable with common wood working tools

D-Blaze^® treated products are:

Approved by major building codes and insurance rating bureaus
Tested and certified by Underwriters Laboratories (UL)
Tested and certified by third party inspection agencies TP and SPIB
UL classified with an FRS rating for the species listed in Table 5 below, exhibiting a flame spread and smoke developed index of 25 or less under ASTM E-84 flame tunnel testing of a 30 minute duration.
Certified under ICC-ES ESR 2645 for the species listed in Table 6 with a flame spread index of 25 or less when subjected to ASTM E-84 flame tunnel testing of 30 minute duration without evidence of significant progressive combustion.
ASTM D-3201 tested for hygroscopicity, resulting in D-Blaze® classification as an interior Type A (HT) fire retardant defined in AWPA Standards U1, UCFA.

Common applications

Roof trusses
Floor trusses
Roof decks and sheathing
Subflooring
Beams and purlins
Blocking and furring
Interior non-load bearing partitions
Studs
Paneling
Joists
Architectural millwork and trim
Exterior load-bearing walls

Strength

D-Blaze^® FRT wood has been tested by independent laboratories following industry standards ASTM 5516 & ASTM 5564 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 Table 1 (D-Blaze^® Lumber Strength Design Factors) and Table 2, 3 and 4 (D-Blaze^® Plywood Span Rating Adjustments) for specific adjustment factors.

Approvals and Testing

D-Blaze^® FRT wood meets or exceeds the guidelines for testing construction materials as set forth and/or established by the:

ICC-ES ESR 2645
City of Los Angeles RR 24502
New York City Building Code (MEA Numbers 406-87 and 407-87)
ASTM D5516
ASTM D5564
ASTM E-84
ASTM D-3201
Insurance Rating Bureaus
National Fire Protection Association (255)
CAN/ULC S102
CAN/ULC S102.2
National Building Code of Canada

Table 1

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 ZONE^1,2
Property	SERVICE TEMPERATURE < 100 ºF (38 ºC)	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.

Table 2

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} PLYWOOD ROOF SHEATHING SPAN RATINGS USED AT TEMPERATURES > 100° F AND <170° F
	CLIMATE ZONE^6,7
	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	48
1 (1.000)	48	48	48
1 ¹/₈" (1.125)	48	48	48

Table 3

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} PLYWOOD ROOF SHEATHING SPAN RATINGS USED AT TEMPERATURES > 100° F AND <170° F
	CLIMATE ZONE^6,7
	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

¹All loads are based on two-span condition with panels 24 inches wide or wider, strength axis perpendicular to supports.
²Fastener size and spacing must be as required in the applicable building code for untreated plywood of the same thickness.
³Roof 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.
⁴For 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.
⁵For 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.
⁶Tabulated 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.
⁷Climate 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)
⁸Duration of load adjustments for snow loads, 7-day (construction) loads, and wind loads as given in the National Design Specifications for Wood Construction apply.
⁹D-Blaze treated plywood must not be used as roof sheathing if a radiant shield is used beneath the roof sheathing.
¹⁰The 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.
¹¹Deflection 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.
¹²Staples 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.

Table 4

PLYWOOD THICKNESS (INCHES)	Southern Pine	Douglas Fir
PLYWOOD THICKNESS (INCHES)	Allowable Span (Inches)^1,2	Allowable Span (Inches)^1,2
³/₈" (0.375)	12	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

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

²Fastener 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.

D-Blaze Lumber and Plywood Approved Species

Table 5

Species awarded Underwriters Laboratories Inc "FRS" classification when treated with D-Blaze^® fire retardant treatment chemicals:

Softwood Lumber
Jack Pine Lodgepole Pine Ponderosa Pine Southern 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	Basswood Red Oak

Table 6

ICC-ES ESR 2645 Approved Species

Softwood Lumber
Jack Pine Lodgepole Pine Ponderosa Pine Southern 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

*Southern Pine

*Red 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.

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 D5516 for plywood and ASTM D-5664 for lumber. Extended specifications can be found in "Sweet's Catalog," "Sweet's Directory," "Architects First Source," "Spec Data." "ARCAT," "ManuSpec®" and "The Blue Book."

All D-Blaze^® FRT lumber and plywood:

shall be pressure-treated with D-Blaze® fire retardant to meet Underwriters Laboratories FRS 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 FRS rating or flame spread and smoke index rating, or the ESR 2645 Building Code Approval, 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 or less.* The fire retardant chemicals used shall be halogen and sulfate free.
shall be kept dry at all times during transit, job site storage and erection. If material does become wet, it shall be replaced or permitted to dry (maximum 19% MC for lumber and 15% MC for plywood) prior to covering or enclosure by wallboard or other construction materials.

All structural design calculations shall be based on the D-Blaze^® Strength Design Factor Tables.

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

Fire Retardant Wood

D-Blaze® fire retardant treated wood is available for interior applications where fire retardant construction materials are specified.

D-Blaze® treated lumber and plywood is highly effective in controlling the spread of flame, smoke and devastation caused by fire. In most applications, D-Blaze® treated products offer a lower in-place cost than noncombustible classified building materials.

Safety & Handling

D-Blaze® pressure-treated products do not contain any EPA-listed hazardous chemicals and are easy to work with, requiring no special precautions other than routine wood working safety procedures. When working with or machining D-Blaze® pressure-treated wood, the following safety precautions should be followed:

Wear gloves to protect against splinters
Wear a dust mask when machining any wood to reduce the inhalation of wood dusts
Wear appropriate eye protection to reduce the potential for eye injury from wood particles and flying debris during machining
Wash thoroughly with mild soap and water after working with treated wood
Wood scraps can be disposed of by ordinary trash collection.
Do not burn

Softwood Lumber
Jack Pine Lodgepole Pine Ponderosa Pine Southern 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

Softwood Lumber
Jack Pine Lodgepole Pine Ponderosa Pine Southern 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

Products

Product Search

Browse by Type or Brand

D-Blaze^®

Product features

D-Blaze^® treated products are:

Common applications

Strength

Approvals and Testing

Table 1

Table 2

Table 3

Table 4

D-Blaze Lumber and Plywood Approved Species

Table 5

Table 6

How to specify D-Blaze^® FRT lumber and plywood

Fire Retardant Wood

Safety & Handling

Products

Product Search

Browse by Type or Brand

D-Blaze®

Product features

D-Blaze® treated products are:

Common applications

Strength

Approvals and Testing

Table 1

Table 2

Table 3

Table 4

D-Blaze Lumber and Plywood Approved Species

Table 5

Table 6

How to specify D-Blaze® FRT lumber and plywood

Fire Retardant Wood

Safety & Handling

D-Blaze^®

D-Blaze^® treated products are:

How to specify D-Blaze^® FRT lumber and plywood