6' - 0" X 6' - 0" Airport
Manhole

Precast Concrete Manhole for Airport

Precast Concrete Manhole for Airport

Precast Concrete Manhole for Airport

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Precast Concrete Manhole for Airport

Concrete: 5,000 psi @ 28 days
                  5% - 8% entrained air
Available duct entrances: a) Standard KO window
                                              b) 4" Ø duct terminator specify tele duct or sch 40
                                              c) Custom configurations and/or locations
Design criteria: a) ASTM C585
                            b) Loading per ASTM C857, including:
                              -Earth cover: Min 1' - 0" Max 10' - 0"
                              -AASHTO aircraft wheel load & applicable impact
                              -Vertical & lateral soil pressures determined using 120 PCF 
                              soil density
                             -Ground water at 3' - 0" below grade
                           c) Structural design performed using AASHTO strength design
                           d) Reinforcing cover per ACI 318 and ACI 350/01
Weight:  3' - 0" minimum headroom
               a) Roof slab: 12,790#
               b) Base section: 25,590#
               c) Total manhole: 38,380#
               d) Min 1' - 0" riser: 3,165#

               7' - 0" maximum headroom
               a) Roof slab: 12,790#
               b) Base section: 40,370#
               c) Total manhole: 53,160#
               d) Max 10' - 0" riser: 22,065#

Precast Concrete Manhole for Airport

Item Description Qty.
1 4T lifting anchors 8
2 Pulling irons: 1-1/4" Ø steel, hot dipped galvanized 4
3 5" Ø Clear opening for sump 1
4 1" Ø ground rod hole 1
5 Cast-in Neenah R-3498-P2S 1
6 Rebar
7 1" butyl rubber joint sealant 3 rolls

Precast Concrete Manhole for Airport