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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.
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"7L68L87L4857L7278L8488L8483/48L9698L9693/4
10"10L610L4858L120118L120113/48L144138L144133/4
10.5"10.5L610.5L48510.5L727
11"11L611L48511L606
12"12L612L48512L60612L84812L8483/412L96912L9693/412L1201112L120113/412L1441312L144133/4
13"13L613L48513L606
14"14L614L48514L606
16"16L616L48516L606
18"18L618L48518L606
20"20L620L48520L606
22"22L622L48522L606
24"24L624L48524L606
26"26L626L48526L606
28"28L628L48528L606
30"30L630L48530L606
32"32L632L48532L606
34"34L634L48534L606
36"36L636L485

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

Responsive Table
DIA. MANHOLE SPACING PART NO.
7"48 x 518"7L485P
7"60 x 620"7L606P
7"72 x 726.25"7L727P
8"48 x 518"8L485P
8"60 x 620"8L606P
8"72 x 726.25"8L727P
8"84 x 826.25"8L848P
8"84 x 8 3/426.25"8L848 3/4P
8"96 x 926.25"8L969P
8"96 x 9 3/426.25"8L969 3/4P
8"120 x 1126.25"8L12011P
8"120 x 11 3/426.25"8L12011 3/4P
8"144 x 1326.25"8L14413P
8"144 x 13 3/426.25"8L14413 3/4P
12"60 x 626.25"12L606P
12"72 x 726.25"12L727P
12"84 x 826.25"12L848P
12"84 x 8 3/426.25"12L848 3/4P
12"96 x 926.25"12L969P
12"96 x 9 3/426.25"12L969 3/4P
12"120 x 1026.25"12L12010P
12"120 x 11 3/426.25"12L12011 3/4P
12"144 x 1326.25"12L14413P
12"144 x 13 3/426.25"12L14413 3/4P
16"72 x 726.25"16L727P
16"84 x 826.25"16L848P
16"96 x 926.25"16L969P

*These are for parallel holes as shown in the image above.

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Download the second table as a PDF

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