1.1 This practice covers the sizes and quality of rock to fill gabions and mattresses. The term mattress as used in this standard shall include the terminology of gabion mattresses and revet mattresses used in Specifications A 974 and A 975. 1.2 This practice does not cover the sizes and quality of rock for other erosion control uses such as riprap or drainfall. 1.3 This practice does not cover the m