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How to install the ductile iron manhole

To ensure proper use of ductile iron manhole. Pay attention to the quality of the installation. Do accurate size. Install sturdy. Easy to open. Look clean and beautiful. According to the technical standard inspection cast iron covers. Formulated the following installation conditions:

Ductile iron manhole brickwork masonry. Should determine its inner diameter or length * width according to the size of manhole covers Design Institute. Radius (such as by solid construction, then the best kind). It may also be the corresponding reference standards. When the puzzle wells must pay attention to the inner diameter of the wellhead should be consistent with the inner diameter of the grate covers well. Covers should be installed flush with the road surface. Concrete or asphalt base will be well cast after laying. Open the lid should be promptly cleaned. Avoid pouring mortar or asphalt will manhole cover with integrated seat. So as not to affect the future open.

Well cement pavement seat installation. On the wellhead brickwork cast 20CM thick smooth ring beam with C25 concrete. Be sure to keep the seat of the Quartet really well. Overall smooth. Shall not be loosened. And covers the casting width of 40CM concrete protection ring (if the cement pavement can also be cast wide 20CM concrete protection circle. And strengthened with steel) to the maintenance of more than 10 days.

To maintain the aesthetic appearance of the cover. Clear surface pattern and handwriting. When asphalt pavement construction applications covering the thin metal covers or cover up waste oil and other brush. Prevent oil sprayed on the asphalt covers; cement in road construction. Application of plastic film covers will cover. In order to prevent contamination covers the surface of cement mortar. Damage the surface pattern, handwriting. You can also finish the construction of water covers the surface clean today.

On the asphalt installation of ductile iron manhole. Must be taken to avoid direct construction machinery rolling well base. When the road the whole cast. Should be set aside on the road is slightly larger than the base of the well bore. After the asphalt Puwan placement. (After all-concrete pavement should be solid in the second Puwan grind stone installation) to ensure the quality of the covers arranged to extend service life.

Please use the above all, pay attention to the construction unit. It covers due to improper installation or damage caused by overloaded vehicles. It does not belong to the factory warranty. Not jointly and severally liable.


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