Various combinations are possible according to the on-site situation! Height adjustment can be easily done by stacking.
The "OK-style lightweight square manhole" is manufactured with a blend of PVA (vinylon fiber), making it a thin and lightweight product. Height adjustment is easy by stacking the main body and the riser. In addition to concrete lids, we offer various types including cast iron lids, cast iron grates, and grating lids. 【Features】 ■ The concrete lid does not have holes for handles, preventing unpleasant odors. ■ It is 3 to 5 centimeters thinner than standard manholes. ■ It weighs about half of a standard manhole. *For more details, please refer to the PDF document or feel free to contact us.
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Oike's concrete products contribute to environmental conservation and disaster prevention! Since our founding in 1970, we have consistently challenged ourselves to create products with originality that cannot be found in other companies. We are always dedicated to manufacturing, focusing on product development and research that align with the demands of the times and the perspectives of our customers. Oike's concrete products, based on creativity and development capabilities that are not afraid of failure, are recognized both in Japan and overseas for realizing a safe and comfortable life while conserving the environment, and are utilized in various locations.