1.ISO9001:2008 quality systems
2.4 running lines.
Wanjie stair tread can be made by steel gratings of any specialization and the sizes are customized.In terms of the style and way of installation , our "Wanjie" stair tread can be divided into four kinds:
WT1: welding fixing stair tread without front plate nosing.
WT2: bolt fastening stair tread without front plate nosing(adopting 65*5mm plate as end bar).
WT3: welding fixing stair tread with front chequered plate nosing.
WT4: bolt fastening stair tread with front chequered plate nosing(adopting 65*5mm plate as end bar).
Maximum length of stair treads:
Bearing bar pitch at 30mm
Bearing bar pitch at 40mm
Recommended width of stair treads:
Bearing bar centers
Width of stair treads(mm)
T1 T2 T3 T4
Spiral hole pitch(mm)
Remarks: bearing bar width is 5mm. As to 3mm in width, all the values in the form should subtract 2mm.
W--welded steel grating L-- pressure-locked C-- socket-welding
Bearing bar centers:
15-30, 40, 60, 80, 90 mm etc. with 30, 40 mm recommended.
Cross bar centers:
any greater than 30mm is ok. with 50, 100mm recommended.
G - galvanized
P - painted
U - untreated
Example: G 325/30/100 WFG
Bearing bar centers at 20mm:
This kind of fine mesh steel gratings have strong load ability and also can prevent the access of sundries of 18mm in diameter. This kind of gratings fit for pedestrian deck, walkway and ditch covers which require high security.
single-side full welding every 6 bearing bars.
Bearing bar centers at 30mm:
This kind of steel grating is the most commonly used in projects with American, Australian, Japan standards are available. This kind of gratings are featured well by heavy-duty, well resistance of strong impact on surface. Gratings with cross bar centers at 50mm can bear lateral impact well. This kind of steel grating fit for all kind of industrial platforms.
single-side full welding every 5 bearing bars.
Bearing bar centers at 40mm:
light grating and very economical. This kind of gratings fit for fixed platforms, walkway, and stair treads and British, German,French and Japanese standards are available. The products most commonly used for Belt corridor, storage shelf,Attic panel, trestle, guardrail, sunshade gate, etc.
single-side full welding every 4 bearing bars.
Bearing bar centers at 60mm:
This kind of steel gratings are especially used for mining industries. It can solve the problem that mineral splashing down and stacks on the walkway. This product usually used for mineral miningand processing and it is the best choice for workshop, meeting room and suspended ceiling of stadium in terms of it's light weight.
single-side full welding every 3 bearing bars.