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FIG 318L, 418L, 418LC

Encapsulated Lightweight Manhole

Our lightweight manholes are encapsulated in a new high performance material. The Morrison engineered laminate has been encapsulated with long life, tougher than a bedliner, polyurea elastomer, built for moisture protection and chemical resistance.

Product Features

Standard Features

High strength elastic protective coating…3X stronger than standard truck bed liner!

Meets H-20 load rating

Exceptional barrier against moisture and chemicals

Strong surface adhesion characteristics—won’t peel or separate

Slip-resistant surface

Extended service life


Construction Details

  • Handle/lift-lug combination: Stainless steel
  • Pry plate: Stainless steel
  • Ring set: 3/16” steel angle iron
  • Skirt: 12-gauge steel
  • Cam assemblies: Nylon and stainless steel
  • Gasket: Polyisoprene rubber

Product Ordering Instructions

Fig Suffix Size Description Gasket Weight
318L 3800 AMC 38” x 10” Lightweight Manhole w/ lay-in cover, encapsulated Yes 125
318L 3900 AMC 38” x 18” Lightweight Manhole w/ lay-in cover, encapsulated Yes 157
318L 4400 AMC 44” x 10” Lightweight Manhole w/ lay-in cover, encapsulated Yes 172
318L 4500 AMC 44” x 18” Lightweight Manhole w/ lay-in cover, encapsulated Yes 188
418L 3800 AMC 38” x 10” Lightweight Manhole, bolt down cover, encapsulated Yes 126
418L 4400 AMC 44” x 10” Lightweight Manhole, bolt down cover, encapsulated Yes 168
418L 4500 AMC 44” x 18” Lightweight Manhole, bolt down cover, encapsulated Yes 188
418LC 3800 AMC 38” x 10” Lightweight Manhole, cam style cover, encapsulated Yes 126
418LC 3900 AMC 38” x 18” Lightweight Manhole, cam style cover, encapsulated Yes 158
418LC 4400 AMC 44” x 10” Lightweight Manhole, cam style cover, encapsulated Yes 168
418LC 4500 AMC 44” x 18” Lightweight Manhole, cam style cover, encapsulated Yes 188