The Schier Great Basin series interceptors
are all available with traffic rated manhole covers.
They are standard on both the GB-75 and the GB-250 (the most popular
Traffic Rated cover and frame passes
AASHTO #M306 for H-20/HS-20 loading
(40,000 pound load)
HERE to see a brief
In this clip, traffic loading is simulated by
using a hydraullic press and applying 60,000
pounds of force to a Great Basin Traffic Rated lid.