12' - 6" x 9' - 0" x 9' - 0" 
Type A Manhole

 

Precast Concrete Manhole 12' - 6" X 9' - 0" X 9' - 0" Type A

Precast Concrete Manhole 12' - 6" X 9' - 0" X 9' - 0" Type A

Precast Concrete Manhole 12' - 6" X 9' - 0" X 9' - 0" Type A

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Typical Precast Concrete Manhole Installation

 

Precast Concrete Manhole 12' - 6" X 9' - 0" X 9' - 0" Type A
Concrete: 5,000 psi @ 28 days
                  5% - 8% entrained air
Rebar: ASTM A-615 grade 60
Available duct entrances: a) Standard KO window
                                              b) 5" Ø duct terminator sch 40
                                              c) 6" Ø duct terminator sch 40
                                              e) 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
                              c) Ground water at 3' - 0" below grade
                              d) Reinforcing cover per ACI 318
Weight:  Top section: 21,585#
               Base section: 19,700#
               Total manhole: 41,285#

Precast Concrete Manhole 12' - 6" X 9' - 0" X 9' - 0" Type A

Item Description Qty.
1 1/2" Ø galvanized steel cable rack inserts 32
2 Pulling irons: 1" Ø steel, hot dipped galvanized 2
3 4T lifting anchors 8
4 Sump depression w/ plastic lid 1
5 1" butyl rubber joint sealant 5 rolls
6 Rebar
7 1" Ø x 5-1/2" ground wire hole 1/2" KO 2
8 1" Ø x 5-1/2" ground rod hole 1/2" KO 2

Precast Concrete Manhole 12' - 6" X 9' - 0" X 9' - 0" Type A
30" Ø Standard Manhole Frame and Cover
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Hardware
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