GRP Molded Gratings

Molded gratings are manufactured  in  an  open,  heated  mold  that  resembles  a  large  waffle  iron Continuous

  reinforcements are placed in the mold in alternating layers and thoroughly wetted out with resin.

This continuous process produces an integral,  one-piece construction,  which offers

excellent corrosion resistance as well as bi-directional strength. When the weaving process is completed,

the mold is heated to cure the panel. If the grating is to haven embedded grit, the mold will receive the grit at this time before the part is cured.

After curing, the part is extracted from the mold. The standard part would have a meniscus (concave)

top surface for slip resistance. Should a standard grit surface be specified, the grit would be bonded

to the top of the completed grating panel as a secondary operation.

Molded Gratings

Liquid resin and continuous fiberglass roving are systematically laid in the mold, layer after layer

manually, to produce the desired thickness and panel dimensions.  The finished molds are set aside for

a predetermined time to allow the panel to cure. The panel is then ejected from the mold. The molds are

cleaned and prepared for the process to begin again.

The one-piece interwoven square mesh construction of molded grating produces two primary

benefits: maximum corrosion resistance and high strength. Because the grating is  “cast”  in one piece,  there is no

mechanical joint between bearing bars.   The high percentage of resin in molded grating offers superior

corrosion resistance.  The molded grating with a  square mesh pattern offers increased load capacity and panel

utilization due to this bi-directional trait.

Cutting access holes in the molded grating does not weaken the panel and does not require additional or costly supports.

APPLICATIONS OF MOLDED GRATINGS

Applications

•     Flooring

•     Platform

•     Walkways

•     Assembly Lines

•     Trench Covers

•     Stairs

•     Greenhouse Shelving

•     Catwalks

•     Ramps

 •    Pool Drainage

•    Portable Building

•    Floors

Markets

•     Electronics

•     Marine (including

       military vessels)

•     Oil & Gas

•     Petroleum Processing

•     Plating

•     Pulp and Paper

•     Chemical

DESIGN

The design procedures associated with   Composite   Grating are entirely different from those

associated with other materials.  The prime consideration in designing with this reinforcement is

allowable  ‘deflection’  as opposed to ultimate  ‘loading’  used with steel and aluminum.  The reason

for this is the inherent elasticity of reinforced plastic,  permitting far greater deflection than steel,

without the danger of structural failure. Load and deflection tables are available on request

Composite Grating’s integral grit top surface provides outstanding anti-slip protection for personnel

in wet and oily environments. The grit is embedded in the top surface of each panel before curing.

This  combination  of  integral  construction,  plus the depth  of  the  embedded  grit,  creates  a  long-lasting

the maximum anti-slip top surface.

CORROSION RESISTANCE

Over a wide PH range (both acidic and caustic) is achieved by the use of a premium-grade resin system.

FRP  grating will outperform metallic grating when exposed to continuous submersion,  splashing,

spills, fumes, or gases. Corrosion is a significant problem for metal grating, stair treads, and other products

in many different industries such as chemical plants,  food and beverage factories,  water and

wastewater facilities, power facilities. Molded grating is particularly designed to provide safe, long-lasting and economical, and worry-free solutions environments where chemicals and other corrosive

materials attack and destroy metal.

FIRE RESISTANCE

Composite Grating is available in various resin systems, two of which meet the Class 1 flame spread

rating of 25 or less, in accordance with the ASTM E-84 Tunnel Test Method. If a flame spread of 10 or

less is required, it will be available at request.

NON-MAGNETIC

The non-magnetic properties allow the Composite grating to be used in sensitive installations where

the inherent magnetic properties of metallic grating would prove unsuitable.

IMPACT RESISTANCE

The impact resistance of   Composite   Grating allows repeated deflection without permanent

deformation.  A  certain amount of deflection can occur with loading.  However,  once the load is

removed,  the grating will return to its original shape,  unlike metallic grating,  which will remain

deformed and require costly repairs or replacement.

Panel size

Our products are :

with 25 mm thickness, panel size is 3660*1220 mm  with mesh size  38*38 mm

with 30 mm thickness, panel size is 3660*1220 mm  with mesh size  38*38 mm

with 38 mm thickness, panel size is 3660*1220 mm  with mesh size  38*38 mm