Design + Engineering



DragonBoard is a U.S. patented, UL approved fire resistant, water resistant, high-impact interior and exterior construction panel. Load capacities handle both residential and commercial structures. With its mold resistant, fire resistant and high-impact properties,
DragonBoard should be used whenever there is a high value placed on a building’s contents and equipment or when health and safety concerns exist. Applications include singlefamily homes, apartment complexes, commercial high-rise buildings, theaters, museums,
schools, hospitals, retail, hotels, restaurants, nightclubs, airports, subway stations, tunnels, fire separations, etc.


DragonBoard is manufactured from a combination of magnesium oxide and magnesium chloride and includes fibrous reinforcement.
Standard production material is very smooth on one side and sand textured on the other. Square or shiplap joints are available.
DragonBoard may be cut, trimmed or shaped using ordinary power or hand tools. Every DragonBoard product is clearly labeled with the red dragon logo and pertinent UL design numbers to eliminate confusion in the field.


Color: Cream/white
1800 x 1200 x 20mm
Suitable for 600mm & 450mm joist spacings
2000x 1200 x 20mm
Suitable for 400mm joist spacings


  • DragonBoard can be used with wood or light-gauge steel framing
  • DragonBoard’s diaphragm stiffness allows distributed loads of over 240 psf (1172 kg/m2) for L/360 when supported on 16″ (406 mm) centers and 360 psf (1758 kg/m2) for L/240. Flexural strength is equivalent to concrete at approximately 3000 psi (20,670 kPa) in compression
  • DragonBoard can be used in heavy commercial construction with the assembly consisting of I-beam construction and Type B corrugated decking in spans up to 5′ (1.5 m), thus eliminating costly and time-consuming concrete pours
  • DragonBoard significantly reduces installation costs, offering savings of 20 – 85% over competing products, depending on the
  • DragonBoard is a non-nutrient to mold or fungus per ASTM G21 and does not support insect life. It provides superior moisture resistance in high-humidity areas and combats the growth of mold and mildew
  • DragonBoard is completely waterproof. It will not disintegrate when immersed in water or exposed to freeze/thaw cycles for prolonged periods of time


  • Where exposed to high-moisture conditions or water, panels must be sealed or painted to preclude water absorption or staining
  • Align control joints with building structure control joints



• ASTM C684 Standard Test Method for Making, Accelerated Curing, and Testing Concrete Compression Test Specimens
• ASTM D5628 Standard Test Method for Impact Resistance of Flat, Rigid Plastic Specimens by Means of a Falling Dart (Tup or Falling Mass)
• ASTM D6109 Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastic Lumber and Related Products
• ASTM E84 Standard Test Method for Surface Burning Characteristics of Building Materials

• ASTM E119 Standard Test Methods for Fire Tests of Building Construction and Materials
• ASTM E662 Standard Test Method for Specific Optical Density of Smoke Generated by Solid Materials
• ASTM G21 Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi


DragonBoard’s New York City MEA number is 359-02-M. ICC approval is pending.


Refer to tables below.
Note – Test reports and system design recommendations are available from the manufacturer upon request.


The DragonBoard floor assembly (assembly number UL U055) is available as a UL tested 2-hour fire resistant system. Surface Burning Characteristics (ASTM E84)
• Flamespread – 0
• Smoke developed – 0


Test reports are available upon request.


DragonBoard is manufactured from mineral components and water and does not contain any organic solvents, asbestos, oils or toxic components, or any heavy metal salts. No energy is consumed in the manufacturing
process since the entire process is conducted at room temperature. Any scrap or drop-off may be reground and reused in production of DragonBoard. Dust or sawdust may be safely buried in landfills, if required. DragonBoard is free of material that would cause contamination or environmental damage to the surrounding area or nearby streams or bodies of water.



Flexural modulus 7.51 X 106KPa ASTM D6109
Flexural strength 7.205 X 103KPa ASTM D6109
Compressive strength 2.07 X104KPa ASTM C684
Shear strength 2.7 X 103KPa ASTM D6109
Flamespread 0 ASTM E84
Smoke developed 0 ASTM E84
Smoke density None ASTM E662 not req.
Moisture content 8% GB/T 160-1997 (China)
Impact resistance 2.237Nm GB/T 7019-1997 (China)
Thermal insulation R-value – 1.2/inch GB/T 7019-1997 (China)
Fungus/mold Non-nutrient ASTM G21
Smoke Nontoxic ASTM E662


Panel 12” (305mm) oc 16” (406mm) oc 24” (610mm) oc
7/16” (11.1 mm) 65.404KPa 35.958KPa 16.088KPa
9/16″ (14.3 mm) 124.920KPa 70.384KPa 31.314KPa

Above recommendations based on a maximum allowable flexural stress of 1000 psi.


Drop height Unclamped edges Clamped edges
12” (305 mm) Hairline cracking Hairline cracking
6” (152 mm) Superficial cracking Superficial cracking


  Joist Spacing
Deflection 305mm 406mm 488mm 2610mm
L/240 44.24KPa 18.817KPa 10.773KPa 5.267KPa
L/360 29.159KPa 12.305KPa 7.134KPa 3.878KPa
L/480 22.121KPa 9.241KPa 5.363KPa 2.969KPa


7/16” (11.1 mm) panel 461/foot
9/16” (14.3 mm) panel 646/foot
3/4” (19.1 mm) panel 1200/foot

Above recommendations based on a safety factor of 4. The use of a T-shaped spline 1/2” (12.7 mm) high with 1” (25.4 mm) wings on both sides is recommended for panels 9/16” (14.3 mm) thick, or heavier, used for subflooring. Contact DragonBoard  for suggested materials.