Cast iron manhole cover specifications: heavy-duty 400KN, general type 250KN, light-type 125KN, square type manhole covers have 500*500 B125 500*500 B125 600*600 B125 C250 700*700 B125 450*750 B125 C250 700*800 B125 and other different user needs Different manhole cover ears have different product specifications and can be customized according to customer needs.
cast iron cover size selection
1. For the sidewalks, roadways, steel gratings of parking lots, cast iron covers on the ground of docks or buildings used on traffic roads, the design and selection should be based on actual conditions due to different loads and vehicle directions. consider.
2. Used for gutters and cross-section ditch covers on roads, not only wheel pressure and impact must be considered, but also the risk of bounce and displacement of cast iron cover must be prevented. Cast iron cover must be fixed with angle steel and support beam.
cast iron cover, with a variety of models to choose from to suit different span loads and requirements.
3. The cast iron cover is often crushed and the road surface is also damaged.
4. It adopts hinge connection or hook connection, which is easy to open and has anti-theft function.
5. Widely used in factories and some high-end communities.
6. It is more widely used in various places such as municipal roads, garden facilities, residential areas, schools, stadiums, and factory construction.
7. Cast iron cover is simple in construction, anti-theft manhole cover is light in weight, good load-bearing, impact resistance, should not be bent, large displacement, beautiful and durable after hot-dip galvanizing, anti-corrosion, and has the incomparable advantages of cast iron cover.
8. The anchor piece of the support frame must be firmly embedded in the cement layer;
9. The supporting surfaces on both sides of the ditch must be flat and firm;
Cast iron manhole cover installation:
1. Before installation, the foundation of the manhole cover should be neat and firm, and the inner diameter, length and width should be determined according to the size of the manhole cover.
2. When installing composite manhole covers on cement roads, pay attention to the wellhead masonry to be poured with concrete, and to build a concrete protection ring on the periphery for maintenance for about 10 days.
3. When installing composite manhole covers on asphalt pavement, attention should be paid to avoiding the direct rolling of the manhole cover and well seat by the construction machinery to avoid damage.
4. In order to maintain the beauty of the manhole cover and the clarity of the writing and pattern, be careful not to stain the manhole cover by pouring asphalt and cement on the road surface.
5. Wellhead, reinforced well circle and well frame must be consistent.
6. Before installing the manhole cover, carefully check whether the type, size and structure of the manhole cover meet the design standards, and check for damage, cracks, etc.
7. The well frame, manhole cover and accessories must be installed firmly, the cast iron manhole cover has a stable process color and the correct position. It should be intact and undamaged.
8. Commercial concrete must be used for pouring; when the concrete curing time is insufficient, early-strength, quick-setting concrete should be used; the concrete must be vibrated and compacted and closely integrated with the road structure.
9. Do not disturb the surrounding pavement structure during excavation and removal of the surface layer and base material at the wellhead.
10. Before pouring the well circle, the well frame should be cushioned according to the measured elevation; the wellhead internal mold must use a shaped template
