30' - 0" x 11' - 0" x 9' - 0"
"Straight" Type Manhole

Precast Concrete Electrical Transmission Manhole

Precast Concrete Electrical Transmission Manhole

Precast Concrete Electrical Transmission Manhole

Screen Friendly PDF

Printer Friendly PDF

Precast Concrete Electrical Transmission Manhole

Concrete: 6,000 psi @ 28 days
                  5% - 8% entrained air
Rebar: ASTM A-615 grade 60 epoxy coated
Available duct entrances: Single duct terminators to accept 6" Ø Sch 40 PVC
                                             Conduit or Custom Configurations And/Or Locations
Design criteria: a) ASTM C858
                            b) Loading per ASTM C857, including: 
                           -Earth cover: Min 1' - 0" Max 9' - 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 
                           c) Structural design performed using AASHTO strength design
                           d) Reinforcing cover per ACI 318
Weight:  a) Top section: 58,915#
               b) Base section: 63,400#
               c) 4' - 0" riser: 7,466# Each
               d) Riser lid: 1,598# Each
               e) Total manhole: 158,571#

Precast Concrete Electrical Transmission Manhole

Item Description Qty.
1 Cable rack inserts: 1/2" Ø 304 stainless steel threaded inserts each with 1/2" Ø x 2" 304 S hex head bolt, 1/2" SS washer and 1/2" PVC washer 56
2 SS pulling irons 4
3 10T lifting anchors 8
4 20" Ø sump opening 2
5 1" butyl rubber joint sealant 16 rolls
6 Rebar, epoxy coated
7 6" Ø duct terminator 48
8 2" ID PVC ground rod hole 4
9 1/4" Ø plastic threaded insert
1/4" x 1" hex head SS bolt
1/4" x 14" nylon strap
38
10 3/8" Ø galvanized steel threaded inserts 20
11 3/4" Ø galvanized steel threaded inserts 3

Precast Concrete Electrical Transmission Manhole