Pressure Locked Grating
Pressure locked grating is pressed the cross bar(steel bar flat) into the bearing bar or grooved bearing bar by pressure machine. This series of gratings with beautiful surface and light duty advantage. They are widely applied to underground, urban construction, port, theatre and other place that needs large loading--bearing capacity.
Pressure Locked grating is manufactured using hydraulic pressure to lock notched bars together. It provides excellent lateral support and has a clean, smooth look. It is not able to support the weight of rolling loads.
Application of steel grating
The superiority,application field and practical application of steel grating
Comparison with checkered plate,steel gratings has the following advantages: light weight,high strength,great load-bearing capacity, being economical of materials ,ventilation and light admission,modern fashion and non-slip and and safe, easy cleaning and installation, being sturdy and durable,etc.
Steel grating are widely used in:electric power,chemical plants,oil refinery,iron and steel works,paper mil,machine building factories,cement mils,municipal engineering,sewage treatment,medicine plants and foodstuff factories.
steel grating standards
Hot Dip Galvanizing Standard
British BS 729
USA ASTM A123/A123M-97a
Hot-dip galvanizing is a form of galvanization.It is the process of coating steel grating with a thin zinc layer,by passing the metal through a molten bath of zinc Mean coating thickness is 70μm when steel bars range from 3mm to 5mm in thickness.
Packing of steel grating
Panels are bundle in a way most appropriate for handle by means of fork-lift or crane rope:two square lumbers are placed on the top and bottom of the bundle respectively. Six or four long bolts of M8 or M10 penetrate through the openings of the gratings and fasten the panels up.For the steel gratings of 3mm thick bearing bars,four pieces of angle steel are added between the bottom square lumber and the panel,to prevent from deformation when hoisting.Besides,special packaging standard as customer’s requirement are also available.
Installation of steel grating
For installation, two fastening methods can be used welding or using saddle clips, For permanent and non-removed installations, the steel gratings are tack-welded to supporting steel. As for the location for welding please see the scheme below, At the four corners of panel, the first bearing bar is tack-welded to the support member with 3mm min filet weld x20r min long. Saddle clips, which have such advantages as not destroying zinc coal and easy removing, are available. Each panel shall use at least four saddle clips For the larger panels preferably a few more clips are used to fix to the available support members. When selecting saddle clips, please refer to the following table.