1. Pultruded grating introduction
Pultruded composite grating use pultrusion “I“, “ T” type profiles as article bearing, solid tube or bars as connection rod, then they are produced into sheet profiles through assembly process. It has no fixed panel design as the thorns distribution will be according to customer’s request.
Pultruded composite grating has the most parts characteristics of molded composite grating, but the key difference is the brilliant fiber glass content (75%-78%), which will reduce the support strength and project charges under when being used under large span compared with molded composite grating,
2.Combination and the connection method of pultruded grating
3.Typical Characteristics of pultruded grating
|Bending strength along fiber direction||GB/T 1449-2005||Mpa||280|
|Bending elastic modulus along fiber direction||GB/T 1449-2005||Mpa||≥2×104|
|Compression strength along fiber direction||GB/T 1448-2005||Mpa||≥80|
|Bending strength retention rate under 45℃，8h water resistance test||GB/T 2575-1989||＞80%|
|Impact strength||GB/T 1451-2005||KJ/m²||200|
|Thermal deformation temperature||GB/T 1634.2-2004||℃||≥200|
|Flame Class||GB/T 8624-2006||A2|
|Water absorption||GB/T 1462-2005||%||＜6|
|Service life||GB/T 2574-2005||年||≥30|
4.Advantages of pultruded grating：
【1】Corrosion resistance: composite pultruded grating has excellent corrosion resistance performance, can resistant different extent of acid, alkali, organic solvents and salt, ect many of gas, liquid medium corrosion, the corrosion resistance is lower than molded grating because of the rich resin on the surface. We can choose the resin economically such as orthophthalic unsaturated polyesters, isophthalic unsaturated polyester resin, vinyl resin as the base material according to application.
【2】Light weight and high strength: composite pultruded grating is pultruded by fiberglass, continuous felt, surfacing mat, ect reinforcing material impregnated and heated by resin. The high fiber content (70% above) make the single direction of strength and rigidity quite outstanding.
【3】Flammability: The oxygen index of composite pultruded grating is above 33 usually, the rate of flame propagation(In accordance with ASTM E-84) <25, the first class of flammability, and obtained approval from ABS; the oxygen index(GB8924) of the phenolic pultruded grating reach to 100, the rate of flame propagation is 5, smoke density is 10.
【4】Impact resistance and fatigue resistance: the composite pultruded grating has high impact strength same as molded grating, allow repeat bending but no permanent deformation; It has moderate elastic, make the person who works on it comfortably long time.
【5】Skid-resistance: there is linear anti-skid slot on surface of composite pultruded grating, the skid-resistance effect also can improve by adhesion agent sanding.
【6】Anti-aging: composite pultruded grating produced by choosing high quality resin, fiberglass system, guarantee the service life 20 years above. After atmospheric exposure, although the appearance has some changes, but the strength will be kept 85% above after 20 years.
【7】Beautiful and easy to maintenance: composite pultruded grating is produced to use color paste blend to resin, bright in color, not easy to blade, no need to paint and has self-cleaning function.
【8】Safety: Composite pultruded grating and molded grating have good electric insulation performance, no electric magnetic and electric spark, used in working area with conductive harm, sensitive to magnetic equipment and flammable and explosive place. It has good economic benefit. The composite pultruded grating adopt automation control production, the quality of product is stable; there is no waste during production almost, high effective utilization rate of raw materials; high effective production, low cost of labor; the length of product can be cutted as customer’s request, diversified dimensions, less waste of cutting.
5.he dimension choose of pultruded grating
6.The installing method and accessory of pultruded grating
7.The detailed parameters of pultruded grating
Except the above mentioned dimension, we also can produce as customer’s request, such as different section shape, outline dimension, different load request, and different color, ect. We will meet customer’s request at the greatest extent, and will reduce the waste to be minimum when cutting, and can supply quite good product and service.
8、The surface treatment of pultruded grating.
Pattern skid resistance plate
Sanded skid resistance surface
Anti-skid slot surface