Product Details

1. serrated treads grating

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 serrated treads grating 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. serrated treads grating 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

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
T1,T2,T3,T4 Bearing bar pitch 40mm		115	155		195	235	275
Fixing hole centers	45		75		100		150