Low Draft/Minimum Taper
Standard Premium Hole Forms

  • 2° wall taper to accommodate the installation of flexible rubber manhole connector.
  • Smooth surface concrete resistant polyester white gel coat for easier extraction.
  • Diameter tolerances allow for use of either toggle or adjustable band type connectors.
  • Super durable 3/8” overall fiberglass laminate thickness.
  • Structural ribs in back cavity to reduce impact blowout of face on face diameters 20”and greater.

2° WALL TAPER TO ACCOMMODATE THE INSTALLATION OF FLEXIBLE RUBBER MANHOLE CONNECTORS*

Responsive Table
DIA. 6" 8" 48 x 5 48 x 8 60 x 6 72 x 7 84 x 8 84 x 8 3/4 96 x 9 96 x 9 3/4 120 x 11 120 x 11 3/4 144 x 13 144 x 13 3/4
7"7L67L87L4857L6067L727
8"8L68L88L4858L6068L7278L8488L8483/48L9698L9693/48L120118L120113/48L144138L144133/4
10"10L610L810L48510L606
10.5"10.5L610.5L810.5L48510.5L60610.5L727
11"11L611L811L48511L60611L727
12"12L612L812L48512L48812L60612L72712L84812L8483/412L96912L9693/412L1201112L120113/412L1441312L144133/4
13"13L48513L60613L727
14"14L485
16"16L616L816L48516L60616L727
18"18L618L818L48518L60618L727
20"20L620L820L48520L60620L727
22"22L622L822L48522L60622L727
24"24L624L824L48524L60624L727
26"26L626L826L48526L60626L727
28"28L628L828L48528L60628L727
30"30L630L830L48530L60630L727
32"32L632L832L48532L60632L727
34"34L634L834L48534L60634L727
36"36L636L8
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