Steel Grating/ manhole cover and frame series
Material: Low carbon steel, stainless steel
Surface treatment: Hot dipped galvanized, painting,black
(1) Structure: Welding with flat steel and cross/round bars with certain distances.
(2) Features: High strength, light structure, high bearing.
(3) Surface: The hot dipped zinc coating gives the product excellent anti-corrosion
|bearing bar size
||25/3mm , 25mm/4mm , 25mm/5mm , 30/3mm , 30/5mm,32/3mm,32/5mm ,40/3mm............ 75/5mm,100/10mm
||30mm x 32mm , 30mm x 60mm, 30mm x 100mm , 38mm x 100mm , 40mm x 100mm , 50mm x 50mm ,50mm x 100mm etc
||black , hot dip galvanized
||plain bar, serrated bar , I shape bar
Hot dip galvanized steel grating tolerance
The allowed deviation of length is +0/-5mm, while the allowed deviation of width is +/-5 mm. The non-perpendicularity of bearing bar is allowed no more than 10% of width of bearing bar.
Cross bar surface should not surpass bearing bar surface 1mm, beginning & end of cross bar should not surpass the end surfaces of two sides of grating 2mm.
Steel grating is widely used for work platforms. Catwalks, transportation
servicing areas and vehicle steps.
The application scope of the platform steel grating is extremely wide. They can be used for various types of platforms for general factories, workshops, mining, ports, power plants, power stations, etc.
Stair treads are also called platform stair steel gratings, which can be installed by two methods: welded and bolted.
Serrated steel grating
Serrated steel grating is made up of flat bearing bars with one side serrated. It has all the charactericers of common steel grating, mostly it has strong anti-slip ability, especially used for humid and slippery environment, and the platfor for offshore production.
Special shaped gratings are the stell grating with various irregularly shaped steel gratings, such as round, trapezoidal, semi-circular, fan-shaped.