4' - 0" X 4' - 0" X 6' - 0" Precast Concrete Manhole

Precast Concrete Manhole 4' - 0" X 4' - 0" X 6' - 0"


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Typical Precast Concrete Manhole Installation

Precast Concrete Manhole 4' - 0" X 4' - 0" X 6' - 0"
Concrete: 5,000 psi @ 28 days
                  5% - 8% entrained air
Rebar: ASTM A-706 grade 60
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 C858
                              b) Loading per ASTM C857,
                              Including:
                              -Earth cover: Min 0' - 6" Max 5' - 0"
                              -AASHTO HS-20 wheel load & applicable impact
                              -Vertical & lateral soil pressures determined using 120 PCF 
                              soil density
                              c) Ground water at 3' - 0" below grade
                              d) Reinforcing cover per ACI 318
Weight:  Top section: 3,545#
               Base section: 4,015#
               Total manhole: 7,560#

Precast Concrete Manhole 4' - 0" X 4' - 0" X 6' - 0"

Item Description Qty.
1 1/2" Ø plastic cable rack inserts & 1/2" x 2-1/4" hex head bolts 16
4 bonding ribbon assy's including:
2 1/4" Ø x 1" inserts & hex bolts 4

1/16" x 3/8" soft tinned copper bonding ribbon 6'

5/8" cable clamps 4
3 Pulling irons: 1" Ø steel, hot dipped galvanized (provisions for two additional pulling irons) 2
4 4T lifting anchors 8
5 Sump depression w/ plastic lid 1
6 1" butyl rubber joint sealant 2
rolls
7 Rebar

Precast Concrete Manhole 4' - 0" X 4' - 0" X 6' - 0"
30" Ø Standard Manhole Frame and Cover
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Hardware
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