2. Introduction
Before FRP came into existence, manhole covers
were traditionally manufactured from concrete,
steel fibre reinforced concrete, cast iron, ductile
iron or PVC materials, but these materials had
their own shortcomings like low load carrying
efficiency. FRP is considered to be the best
alternate material for manhole covers as it has
longer life span and has the capability to
withstand heavy loads. Increase in heavy traffic
and expensive metals completely replaced
traditional covers with FRP manhole covers.
Glass fiber reinforced
plastic covers is made of
unsaturated polyester
resin as matrix of fiber
reinforced thermosetting
composite material,by
molding pressure
technology, is a kind of
new environment-friendly
power cover.
3. Standard sizes available
Round: Rectangle:
Φ350mm Φ500mm 750*450 600*600
Φ600mm Φ650mm 300*500 400*600
Φ700mm Φ750mm 700*700 500*400
Φ800mm Etc.
FRP manhole cover usage:
Class label Test load Using
Light Duty
E 20
Using for footway and the area which
can only be used by pedestrians &
cyclists.
Middle Duty
F
100 Using for footways, pedestrian, car
parks or car parking decks, used by
road car, light vehicles and farming
tractor, etc.
Heavy Duty
G 240
Using for carriageways of roads
(including area of class A&B).used by
road car, camion,etc, not hard
vechicles.
Extra-Heavy Duty
H
360 Using for carriageway area, used by all
types of roads, all types of road
vehicles.
4. Characteristics of our manhole cover:
(A) High intensity:
The manhole cover is made by polymer
composite material with steel skeleton, and is
moulded under high temperature and pressure. It
can hold a ultimate 54 tons according to the test
result, which meets and even exceeds the latest
criterions in CJ/T211-2005,promulgated by the
Ministry of Construction of the People ’ s
Republic of China.
(B) Elegant appearance:
The patterns of the manhole cover are well
designed with various colors,which can beautify
the environment of the city.
(C) Lighter in weight:
It only weighs one third of the cast iron manhole
cover that it ’ s easier for transportation,
installation and emergency repair, Besides, It
also lightens labour intensity immensely.
(D) Good anti-theft:
It is made by polymer composite material with
no no recycling value that prevent being stolen.It
is set with lock structure which can secure the
belongings under it. Thus it keeps away these
accidents which were caused by the missing of
manhole cover.
(E) High durability:
It is made by polymer material which has a
larger molecular and better stability, and works
under the temperature between 50℃below zero
and 150 ℃ above zero with the Scientific
formulation advanced skills and Technical
equipment.
(G)Corrosion-resistance:
According to the test of the National
Research & Analysis the Center of
Chemical Building Materials, the
products is corrosion-resistant and has a
3 level capability of ageing resistance.
Thus it has a longer service.
5. Installation Procedure:
a) Prepare concrete bed considering height of frame.
b) Frame should be embedded in 300 x 200 mm of minimum M—20 grade concrete.
c) Make sure that top level of frame should match with the road.
Application：
(1) Municipal construction; communications; electric power supply; water supply;
drainage; plaza; school and the web establishment;
(2) Residence district; roadway; park; pedal cyclist; footway.
6. Hebei Shangrun Environmental Technology Co.,Ltd is professional in manufacturing
and exporting FRP machine and FRP products.
Our machine includes:
FRP pipe winding machine, FRP tank winding machine, FRP pultrusion machine,
FRP grating machine, FRP sheet machine, FRP rebar machine,and so on.
Our FRP products includes:
FRP pipe, FRP tank, FRP septic tank, FRP manhole cover, FRP membrane housing,
SMC water tank, FRP profile like FRP rod, FRP tube, FRP sheet, FRP rod, FRP channel,
beam, FRP grating, FRP purification tower, FRP cooling tower, FRP cable tray, and so
on.
Welcome to visit our factory and choose the products you need!!!
