New design new style  hot dip galvanized outdoor steel grating stair treads

 Our company has more than ten years experience in manufacturing and exporting steel grating stair treads with high quality and competitive price and faster delivery time. 

1>Material :Q235 steel bar and round steel bar.Stainless steel.

2>Surface process: hot-dipped galvanized ,PVC coating,black paintting.

Plain type of steel grating stair treads

Serrated steel grating stair treads

2.Specification of galvanized steel grating stair treads

1>Shape of bearing bar: plain or serrated  type.

2>Bearing Bar Pitch (center to center):according to client's requirement and 30, 40, 60mm are recommended.
3>Bearing Bar (Load Bar)  thickness and depth(mm): 20 x 3 to 100 x 10 etc; 

4>Cross bar pitch(center to center) :38.1, 40, 50, 60, 76, 80, 100, 101.6, 120mm, 2' ' & 4' ' etc

3.The manufacturing process of galvanized steel grating stair treads

The factory of our company has strong ability in manufacturing production by large quantity. We can assure you about the quality with competitive price,and we can  manufacturer all kinds of galvanized steel grating stair treads.

  Welded process

Galvanized process

Customers' visiting 

4.The application of  galvanized steel grating stair treads

5.The installation of galvanized steel grating stair treads

Steel grating stair treads made by our company are easy to install,there are two ways to install it.Weld it directly for permanent using or  use blots to fix it for re-movement,it's very easy to install it with our special design.

6.Galvanized steel grating features

(1)Attractive appearance: Simple outline.silver colour,and modern.

(2)Optimum water draining: Water leakage area is 83%,which is two times larger  than that of cast iron.

(3)Hot dip galvanizing: Good anti rust performance,maintenance free and replacement free.

(4)Design of preventing theft: The cover is connected with the frame by gemel,which ensures protection against theft,safety,and convenient opening.

(5)Saving investment: With large span,the cost is lower than that of cast iron when under heavy load.And the replacement expenses in case of theft and crushing will be saved.

(6)High strength:With strength: With strength and toughness far higher than those of cast iron,it can be used in the environment with large span  and heavy load,such as the wharf and the airport.

(7)Many specifications available: The requirement of different environments,loads, spans,sizes and shapes can be satisfied.

7.Standards of galvanized steel grating stair treads.

8.Tolerance of galvanized steel grating stair treads

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. 

 Payment: 30% by T/T in advance, the balance by T/T against the fax copy of B/L.

 Why choose Haiao ?

1)We have a standard manufacturing line and a complete quality ensuring system for high quality galvanized steel grating reaching your  requirements.

2)We own most advanced production equipments.The CNC press-welding meshine is controled by computers.

3)We have more than ten years experiences about manufacturing and exporting.

4)We own more than ten senior engineers,they can promise our product technology in the industry in a leading level.

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