What is the coefficient of friction rating (slip resistance) requirement for the walking surface of a deck board?
DA rating of 0.50 is generally recognized as denoting a slip resistant walking surface. Though it is unclear when or who first determined that this should be the acceptable threshold value, this is generally accepted as the “minimum” rating for a slip resistant material Most organizations and standards are not willing to declare that 0.50 is the required threshold. ANSI/ASSE A 1264.2-2006 and AAMA 2200 are about the only published specifications that state a required coefficient of friction (COF). Section 6.6, Slip Resistance, of AAMA 2200 states that the static COF shall be greater than or equal to 0.5 when tested wet and dry and when tested in accordance with ASTM F 1679. Some additional information: • Model building codes talk about slip resistance but do not specify a minimum rating (threshold) • Neither ICC-ES™ AC174 nor ICC-ES™ AC109 requires slip resistance testing • Both ASTM D 7031 and D 7032 mention that ASTM F 1679 is preferable to other methods of determining slip resistanc
