2005 Washington Revised Code RCW 46.04.530: Semitrailer.

"Semitrailer" includes every vehicle without motive power designed to be drawn by a vehicle, motor vehicle, or truck tractor and so constructed that an appreciable part of its weight and that of its load rests upon and is carried by such other vehicle, motor vehicle, or truck tractor.

[1979 ex.s. c 149 § 1; 1961 c 12 § 46.04.530. Prior: 1959 c 49 § 57; prior: (i) 1943 c 153 § 1, part; 1937 c 188 § 1, part; Rem. Supp. 1943 § 6312-1, part. (ii) 1937 c 189 § 1, part; RRS § 6360-1, part; 1929 c 180 § 1, part; 1927 c 309 § 2, part; RRS § 6362-2, part.]