"HS-20 loading" means the force imposed by a pair of 16,000 pound concentrated loads, one located over the point in question and the other located 72 inches distant, so as to simulate the tire loads of a truck.
N.H. Admin. Code § Env-Wq 702.10
(See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06