NFPA 664-1998 Standard for the Prevention of Fires and Explosions in Wood Processing and Woodworking Facilities. Authority Having Jurisdiction.* The organization, office, or individual responsible for approving equipment, an installa- tion, or a procedure. Combustible Wood Dust.* Any finely divided solid material of 420 µ m (microns) or smaller in diameter (material passing a U.S. No. 40 Standard Sieve) that presents a fire or deflagra- tion hazard. Damage Limiting Construction.* A building construction method that incorporates exterior wall, or roof sections, or both, designed to relieve deflagration pressures without jeop- ardizing the structural integrity of the building and without allowing the deflagration to propagate into adjacent interior spaces. Deflagration. Propagation of a combustion zone at a veloc- ity that is less than the speed of sound in the unreacted medium. Explosion. The burning or rupture of an enclosure or a container due to the development of internal pressure from a deflagration. Hog (Wood Hog). Machine used to grind or reduce the size of wood, other feed stock, or scrap wood. Labeled. Equipment or materials to which has been attached a label, symbol, or other identifying mark of an orga- nization that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains peri- odic inspection of production of labeled equipment or mate- rials, and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner. Listed.* Equipment, materials, or services included in a list published by an organization that is acceptable to the author- ity having jurisdiction and concerned with evaluation of prod- ucts or services, that maintains periodic inspection of production of listed equipment or materials or periodic eval- uation of services, and whose listing states that either the equipment, material, or service meets identified standards or has been tested and found suitable for a specified purpose. Shall. Indicates a mandatory requirement. Should. Indicates a recommendation or that which is advised but not required. NFPA 664 pdf download.
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