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Place of Origin:	China (Mainland)
Brand Name:	jiuwang
Model Number:	JW04
Size:	G405/50/100
Materials:	steel
Certification:	ISO9001
product name:	steel stair treads grating
product:	welded
material:	Low carbon,middle carbon,stainless steel
material standard:	GB700-88,ASTM(A36),BS4360(43A),AS3679
bearing bar size:	203,205,253,255,323,325,353,355,
cross bar pitch:	24-200mm
surface treatment:	Hot dipped galvanized,painted,self-color,
grating standard:	YB/T4001.1-2007,ANSI/NAAMM(MBG531-88),
type of steel stair treads grating:	bolted welded
payment:	LC TT

1)There are four kinds of stair treads T1,T2,T3,T4.

T1 Welded fixing and Without nosing

T2 Bolted fixing and without nosing,easy to installation and teardown.

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

T4 Bolted fxing and with checkered plate nosing, easy be installation,

teardown and can be 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.steel stair treads specification

Pitch of Bearing bar	Cross-bar Pitch	Specification of bearing bar load(width×thickness)
Pitch of Bearing bar	Cross-bar Pitch	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
30	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
40	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