HDPE Manhole Adjustment Rings

The Original HDPE Manhole
Adjusting Rings

Innovation that deliver results faster, for much less.

BABA

Build America,
Buy America

ladtech_american_flag_BABA

LADTECH, Inc. fully meets the EPA’s “Build America, Buy America” provisions as stipulated by Public Law 117-58 §§ 70911. Our HDPE manhole and storm drain riser rings are American manufactured in Sparta, Wisconsin, utilizing 100% recycled plastic products fully acquired in the USA. This ensures that our products adhere to the “Build America, Buy America” standards, supporting the domestic economy and promoting sustainable practices.

All our products carry a 30-year warranty, meet ASTM – 4976 standards and AASHTO HS-25 highway loading.

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Manhole Adjustment Rings size

LADTECH® Polyethylene Manhole Adjustment Rings

  • Adjusting Ring Flat Design
    • Plastic injection molded Adjusting Ring
    • Molded from high density polyethylene as defined in ASTM specification D-4976
    • Actual resin properties will vary allowing for the utilization of 100% regrind material
    • Dimensions shown are normal – actual size will vary within allowable tolerance and required fit
  • Dimension Schedule
    Cone Size Dim A Dim B Dim C Dim D Dim H
    24″ 33.50″ 23.75″ 5.00″ 23.25″ .25, 1.25, 1.50, 2.00, 4.00″
    27″ 36.50″ 26.75″ 5.00″ 26.25″ .25, 1.25, 1.50, 2.00, 4.00″
    30″ 39.50″ 29.75″ 5.00″ 29.25″ 25, 1.50, 2.25, 4.00″
    32″ 41.50″ 31.75″ 5.00″ 31.25″ .25, 2.00, 3.00″
    34″ 41.50″ 33.75″ 4.00″ 33.25″ .25, 2.00, 3.00″
    36″ 47.50″ 35.75″ 5.50″ 36.25″ .25, 1.50, 2.50″
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Manhole Adjustment Rings size

LADTECH® Polyethylene Manhole

  • Adjusting Ring Slope Design
    • Plastic injection molded Adjusting Ring
    • Molded from high density polyethylene as defined in ASTM specification D-4976
    • Actual resin properties will vary allowing for the utilization of 100% regrind material
    • The percent of post consumer waste to industrial waste will vary with availability and property retention needs
    • Color, shade, and uniformity will vary with the mix of the post consumer and industrial waste materials
    • Dimensions shown are normal – actual size will vary within allowable tolerance and required fit
  • Dimension Schedule

    (Dimension E = inside hole center to center)

    Cone Size Dim A Dim B Dim C Dim D Dim H1 Dim H2
    24″ 33.50″ 23.75″ 5.00″ 23.25″ .75″ 1.50″
    27″ 36.50″ 26.75″ 5.00″ 26.25″ .75″ 1.50″
    30″ 39.50″ 29.75″ 5.00″ 29.25″ 1.50″ 2.25″
    32″ 41.50″ 31.75″ 5.00″ 31.25″ 1.25″ 2.25″
    34″ 41.50″ 33.75″ 4.00″ 33.25″ 1.25″ 2.25″
    36″ 47.50″ 35.75″ 5.50″ 36.25″ 1.50″ 2.50″
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Manhole Adjustment Rings size

LADTECH® Polyethylene Manhole Adjustment Rings

  • Adjusting Ring Wedge / Slope Grade Graph

    GRAPH INDICATES VARIOUS GRADES YOU CAN ACHIEVE FROM THE WEDGE/SLOPE ADJUSTING RING:

    Desired Grade Ring Position
    4.100% =0+0
    3.075% =0+45
    2.050% =0+90
    1.025% =0+135
    0.000% =0+180