fiberglass manhole cover well pit covers bmc/smc manhole cover

Cement manhole cover

Cast iron manhole cover 

Magnesium the manhole cover 

Playmer manhole cover 

Weight

110kg 

130kg

80kg

50kg

30kg

Resistance to diamantle 

15Mpa

21Mpa above 

21Mpa

21Mpa

25.8 Mpa

Appearance 

cement color 

black ,rust

colorful light-colored 

colorful unfast 

colorful level off , smooth

life 

10years 

20years

10years

10years

50years

Internal streng then marterial

half-round bars

No

Bamboo 

reinforced 

rebar

usage 

Easy happening drop hom cracked breakag gephenomenon

The high cost and the rust easy to steal

Reverse bittern bibulous easy weathering 

Encounter heat too fragile encounter heat difficult open and aging 

Security environmental protection becutify the environment the cost is low