12' - 6" x 10' - 9" x 9' - 0" "T" Type Electrical Distribution Manhole
Typical Precast Concrete Manhole Installation
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Concrete: 5,000 psi @ 28 days
5% - 8% entrained air
Rebar: ASTM A-615 grade 60 epoxy coated
Available duct entrances: Single duct terminators to accept5" Ø Sch 40 PVC
conduit
Design criteria: a) Meets ComEd* spec #C4381.B dated 5-1-95 and EM-14927
dated 9-1-92
b) ASTM C858
c) 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
c) Structural design performed using AASHTO strength design
d) Reinforcing cover per ACI 318
Weight: a) Top section: 20,980#
b) Base section: 20,340#
c) Total manhole: 42,320#
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| Item |
Description |
Qty. |
| 1 |
Cable rack inserts: 1/2" Ø 304 stainless threaded inserts each with 1/2" Ø x 2" 304 S hex head bolt, 1/2" SS washer and 1/2" PVC washer |
32 |
| 2 |
SS pulling irons |
3 |
| 3 |
4T lifting anchors |
8 |
| 4 |
20" Ø sump opening |
1 |
| 5 |
1" butyl rubber joint sealant |
5 rolls |
| 6 |
Rebar, epoxy coated |
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| 7 |
5" Ø duct terminator |
54 |
| 8 |
1" Ø x 5-1/2" ground wire hole 1/2" KO |
2 |
| 9 |
1/4" Ø plastic threaded inserts
1/4" x 1" hex head SS bolt
1/4" x 1/4" Nylon Strap |
22 |
| 10 |
Ladder insert 3/8" Ø threaded carbon steel |
4 | |
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Cast Iron Frame and Vented Cover
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Electrical Distribution Hardware Chart
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