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steel ladder,standard grating,steel stair tread,grating floor
steel ladder,standard grating,steel stair tread,grating floor

Minimum Order: 0
Quality/Safety Certification: 0.00


1.Full range of steel gratings.
2.4 running lines with more than 20,000 tons per year.
3.ISO9001:2008 quality system

 "Wanjie" brand steel ladders(inclined ladders,vertical ladders&revolving ladders) are manufactured as per construction steel ladder atlas 02J401, which are made up of stair treads and protective baluster. Customized type is also available. The galvanized surface treatment makes the appearance attractive and it is easy to installation and maintenance. Wanjie steel ladders are one-time completion inside the factory and you can also choose local connections with our standard handrails

 

.

Type

W-- welded steel grating   L-- pressure-locked   C-- socket-welding

Bearing bar centers

15-30, 40, 60, 80, 90 mm etc. with 30, 40 mm recommended.

Cross bar centers

any greater than 30mm is ok. with 50, 100mm recommended. 

Surface treatment

G-hot-dip galvanization(G is usually omitted)

P-painting

U- untreated

Bearing bar shape

F- plain surface (F is usually can be omitted)

S-serrated surface

I-the section is of ‘I’ type

 

WT1:  welding fixing stair tread without front plate nosing.

WT2:  bolt fastening stair tread without front plate nosing(adopting 65*5mm plate as end bar).

WT3:  welding fixing stair tread with front chequered plate nosing.

WT4:  bolt fastening stair tread with front chequered plate nosing(adopting 65*5mm plate as end bar).


Recommended width of stair treads:

Bearing bar centers

type

Width of stair treads(mm)

 30mm

T1 T2 T3 T4

95

125

155

185

215

245

275

 40mm

T1  T2

 


125

165

 


205

245

285

 40mm

T3  T4

 


115

155

 


195

235

275

Spiral hole pitch(mm)

45

75

100

150

Remarks: bearing bar width is 5mm. As to 3mm in width, all the values in the form should subtract 2mm.


Maximum length of stair treads:

Specialization /size

25×3

25×5

32×5

Bearing bar pitch at 30mm

550

900

1300

Bearing bar pitch at 40mm

450

750

1200

 

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