1. spiral staircase  common introduction

  1)Size: tread length by width, the length direction of tread refers to the width direction of ladder

2)Material: Q235 in line with GB/T700 steel, steel or stainless steel
3)Surface treatment: Hot-dip galvanizing, paint or other anti-corrosive coatings are available, of which hot-dip galvanizing is generally recommended
4)Bearing bar pitches can be 12.5, 15, 20, 30, 30.16, 32.5, 34.3, 40, 60mm, of which 30mm & 40mmare recommended
5)Cross bar pitches can be 38, 50, 60,100mm, of which 50mm & 100mm are recommended

Max. Stair treads lengths

 Recommend stair tread widths

Note:bearing bar thickness 5mm

2. spiral staircase   Types: 

1)There are six 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.

    T5        welded strip nosing

     T6      Bolted strip nosing

2) Material: Mild Steel (Low Carbon Steel) or Stainless Steel

3) 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.whole product line -   spiral staircase

pany review

Hebei Jiuwang Metal Wire Mesh Co.,Ltd.(original Anping County Jintai Metal Mesh Co.,Ltd.).Established in 1992,our company is a manufacturer of large steel structure and steel gratings,integrating development,production and distribution.The company register capital is 10,080,000 Yuan,and take an area of 34,680 square meters.In 2003,we have got the ISO9001:2000 certification by BQR. 

6.our company activity( ( new year open in snow, attend economic meeting,dinning with customer,group trour,canton fair show)

7.steel stair treads usage

ntact information