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We are one of the biggest and professionalmanufacturerof high quality steel grating in China .We are located in Ningboand near to Shanghai . Ningbo Lihong Steel Grating Co.,Ltd has approved ISO9001-2000 Quality Management System and we workISO9001-2008that is the newest editionnow.There are manyregular grating customers in USA ,AUS,Kuwait, UAE, Malaysia, ,Philippine,Singapore,UK,New zealand,Tunisia ,South Africa and so on. More than 60% of products is exported to the worldwide. Ourcompany is specialized in manufacturing and exports all kinds of steel gratings with the best quality and competitive price and faster delivery time such as steel / mill black and hot dip Galvanizing / and stainless grating flooring walkway, platform ,steel structures, stair tread, well cover, trench cover, sump cover,compound gratings, storage shelves, ladder, fences and handrail so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on. We produce three kinds of steel gratings, they are Plain Style Steel Grating, Serrated Style Steel Grating and I Bar Type Steel Grating. They are widely used in steel structure platforms, stair treads, sidewalks, drainages and well covers etc. We can design and manufacture standard steel grating and in customized shapes per client's requirements. 1)There are fourkinds of stair treads T1,T2,T3,T4. T1 Welded fixingandWithout nosing T2 Bolted fixing and without nosing,easy to installation and teardown. T3Welded fixing and with checkered plate nosing, can be skid. T4 Bolted fxing and with checkered plate nosing, easy be installation, teardown and can be skid. Notes: Stair tread may be of any types of grating,the size may be up to no standard specification We recommended : Bearing bar pitch is 30,40,60mm. Cross bar pitch is 40,50,60,100mm Width :125,155,185,215,245,275,305mm 2) Material: Mild Steel (Low Carbon Steel) or Stainless Steel 3) Surface Treatment: Untreated, Painting ,Powder coated or Hot dip Galvanizing 4) Steel grating standards: A) China: YB/T4001-1998 B) USA: ANSI/NAAMM (MBG531-88) C) UK: BS4592-1987 D) Australia: AS1657-1988 E) Japan: JJS. Contact: Miss Suri Yu, Tell:0086-574-88073970 Mobile: 008613429291785,Fax:0086-574-88073962