Hot DIP Galvanized Outdoor Stair Treads and Steel Ladder Grating

• After-sales Service: Any Time
• Warranty: Any Time
• Place of Origin: Hebei Anping
• Type: T,T2,T3,T4 Bolted&Welded
• Application: Outdoor
• Surface Treatment: Untreated,Mill Finish,Hot DIP Galvanized
• Model NO.: T1, T2, T3, T4
• Brand Name: Jiuwang
• Quality: ISO9001
• Transport Package: Steel Belt
• Specification: ISO9001 SGS
• Trademark: Jiuwang
• Origin: Hebei Anping
• HS Code: 730890
• Production Capacity: 10000sqm

Product Description

 1.  external steel stairs- metal stair treads

We manufacture different styles of stair ladders that used in family,industry and construction. 

Material: mill steel black and hot dip Galvanizing / and stainless grating

Usage: ladder, flooring walkway, platform ,steel structures, stair tread, well cover, trench cover, sump cover,compound gratings, storage shelves,fences and handrail so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on.

2 metal stair treads  type.

1)There are six kinds of steel grating stair  T1,T2,T3,T4.T5,T6

    T1         Welded fixing and Without nosing

    T2         Bolted fixing and without nosing,easy to installation and dismantle

    T3         Welded fixing and with checkered plate nosing, can be anti-skid.

    T4         Bolted fxing and with checkered plate nosing,  can be anti-skid ,easy be installation,

    T5        Welded fixing and with striped plate nosing, can be anti-skid.

    T6         Bolted fixing and with striped plate nosing, can be anti-skid.

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

 

3. metal stair treads  specification

Pitch of Bearing bar	Cross-bar Pitch	Specification of bearing bar load(width×thickness)
		32×5	40×5	45×5	50×5	55×5	60×5
30	100	G325/30/100	G405/30/100	G455/30/100	G505/30/100	G555/30/100	G605/30/100
	50	G325/30/50	G405/30/50	G455/30/50	G505/30/50	G555/30/50	G605/30/50
40	100	G325/40/100	G405/40/100	G455/40/100	G505/40/100	G555/40/100	G605/40/100
	50	G325/40/50	G405/40/50	G455/40/50	G505/40/50	G555/40/50	G605/40/50
60	50	G325/60/50	G405/60/50	G455/60/50	G505/60/50	G555/60/50	G605/60/50

 

Max. Stair treads lengths

 

Steel grating specification Bearing bar size	25*3	25*5	32*5
Bearing bar pitch30mm	550	900	1300
Bearing bar pitch 40mm	450	750	1200

 

Recommend stair tread widths

 

T1,T2,T3,T4 Bearing bar pitch 30mm	95	125	155	185	215	245	275
T1,T2,T3,T4 Bearing bar pitch 40mm		125	165		205	245	285
		115	155		195	235	275
Fixing hole centers	45		75		100		150

 

Note:bearing bar thickness 5mm