15' - 0" x 12' - 0" x 9' - 0" Airport "T" Manhole

Concrete:
  • 5,000 psi @ 28 days
  • 5% - 8% entrained air
Rebar:
ASTM A-615 grade 60 epoxy coated
Available duct entrances:
  • a) Standard KO window
  • b) 5" Ø duct terminator
  • c) Custom configurations and/or locations
Design criteria:
  • a) ASTM C585
  • b) Loading per ASTM C857, including:
  • -Earth cover: Min 1' - 0" Max 5' - 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:
  • a) Top section: 65,385#
  • b) Base section: 55,425#
  • c) Total manhole: 120,810#
Item Description Qty
1 Cable rack inserts: 1/2" Ø galvanized steel threaded inserts each with 1/2" Ø x 2-1/4" bolt 32
2 Pulling irons: 1-1/4" Ø steel, hot dipped galvanized 3
3 10T lifting anchors 8
4 20" Ø sump opening 1
5 1" butyl rubber joint sealant 8 rolls
6 Rebar
7 1" x 11-1/2" ground wire hole 1/2" KO 4
8 Ladder insert 3/8" Ø threaded carbon steel 4
9 1/4" Ø plastic threaded inserts
1/4" hex head SS bolt
1/4" x 1/4" nylon strap		 18
10 Galvanized step 2
11 5" Ø duct terminator 54
3x6x6 Manhole - Typical Install PDF
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3x6x6 Manhole