Hot DIP Galvanized Steel Stair Treads with Bearing Bar Specifications and BS4592-1987 Standard

Step plate The tread plate, also known as the stair tread plate, steel ladder plate or steel ladder, is a type of staircase with grating plates used on the platform. According to the installation method, there are generally two major types: welded fixation and bolted fixation. The type that is directly welded to the keel does not require the addition of side plates for the tread plate, which is relatively economical and durable but not easy to disassemble. The bolt-fixed tread plate requires thickened side plates on both sides, with holes drilled in the side plates, and is directly fixed by bolts during installation.

1) Bearing Bar (Load Bar) Specifications (mm):
The specification of plain type and serrated type bearing bar is 25 x 3 to 100 x 8; The specification of I-section type is 25 x 5 x 3, 32 x 5 x 3, 38 x 5 x 3, 40 x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4, 75 x 7 x 4, etc.

2) Bearing Bar Pitch (center to center):
12.5, 25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, 80, 100 mm etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is available <1'' x 3/16'', 1 1/4'' x 3/16'', 1-1/2'' x 3/16'', 1'' x 1/4'', 1-1/4'' x 1/4'', 1 1/2'' x 1/4''(19-w-4) and so on. >

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

4) Surface Treatment:
Untreated, Painting or Hot DIP Galvanizing

5) Steel grating standards:
A) China: YB/T4001-1998
B) USA: ANSI/NAAMM (MBG531-88)
C) UK: BS4592-1987
D) Australia: AS1657-1985
E) Japan: JJS

Bearing Bar Specifications Steel Stair Treads

BS4592-1987 Standard Steel Ladder Plate

AS1657-1985 Standard Steel Grating Treads

Hot DIP Galvanized Steel Stair Treads with Bearing Bar Specifications and BS4592-1987 Standard Images