Concrete: 5,000 psi @ 28 days
                  5% - 8% entrained air
Rebar: ASTM A-615 grade 60 Black Bar
Available duct entrances: a) Standard KO window
                                              b) Custom configurations and/or locations
Design criteria:    a) ASTM C858
                               b) Loading per ASTM C857,

                              Including:
                              -Earth cover: Min 1' - 0" Max 5' - 0"
                              -AASHTO HS-20 wheel load & applicable impact
                              -Vertical & lateral soil pressures determined using 120 PCF 
                              soil density
                              -Ground water at 3' - 0" below grade
                              -Reinforcing cover per ACI 318
Weight:  Top section: 1,960#
               Base section: 2,160#
               Total manhole: 4,120#