Galvanized Stair Tread St1-St4

• Customization: Available
• After-sales Service: 2 Years
• Warranty: 2 Years
• Model NO.: ST1-ST4
• Structure: Beam
• Bench: Single Stair
• Type: Ordinary Stairs
• Material: Metal
• Usage: Outdoor
• Stair Type: Straight Stair
• Certificate: ISO 9001:2008
• Surface: Hot DIP Galvanized
• Price Term: EXW, Fob, CIF
• Size: as Customer Need
• Transport Package: Steel Belts
• Specification: 253/30/100
• Trademark: N/M
• Origin: China
• HS Code: 7308900000
• Production Capacity: 2500 Tons Per Month

Product Description

Our company produces steel ladders with guardrail, which are made of grating treads. 
When specifying the steel ladders, pls refer to the national standard construction drawing
87J432. According to whether the nosings are to be used and the methods of mounting 
to stringers, stair treads are classified into four types: T1, T2, T3, T4. We suggest that the 
dimensions are as follow:
 

Item	Recommended  maximum stair treads length (mm)
Bearing bar dimension mm	25*3	25*5	32*5
Bearing bar's pitch at 30 mm	550	900	1300
Bearing bar's pitch at 40 mm	450	750	1200

 

Item	Recommended stair treads width (mm)
T1/T2/T3/T4 Bearing bar pitch at 30mm	95	125	155	185	215	245	275
T1/T2 Bearing bar pitch at 40mm T3/T4		125	165		205	245	285
		115	155		195	235	275
Fixing hole center(mm)	45		75		100		150

 

1.Grating Types:	W--welded steel grating   L-- pressure-locked   C-- socket-welding
2.Bearing bar Pitches:	15-30, 40, 60, 80, 90 mm etc. with 30, 40 mm recommended.
3.Cross bar Pitches:	50, 100mm are recommended.
4.Surface treatment:	G - galvanized       P - painted       U - untreated
5.Grating standard:	China:   YB/T4001.1-2007(YB/T4001.1-1998)         Britain:   BS4592-1:1995         US:      ANSI/NAAMM(MBG531-93)         Australia:  AS1657-1992
6.Marks:	Example: G 325/30/100    G255/40/50