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Specifications of steel gratings

No

Item

Description

1

Bearing bar

20x5, 25x3, 25x4, 25x5, 30x3, 30x4, 30x5, 32x3, 32x5, 40x5, 50^75x8mm, etc.

2

Bearing bar pitch

25, 30, 30.16, 32.5, 34.3, 40, 50, 60, 62, 65mm, etc.

3

Cross bar

5x5, 6x6, 8x8mm (twisted bar or round bar)

4

Cross bar pitch

40, 50, 60, 65, 76, 100, 101.6, 120, 130mm or as customers' requirement.

5

Surface treatment

Black, Hot dip galvanized, Cold dip galvanized, Painted, Powder coated, or as customers' requirement.

6

Flat bar type

Plain, Serrated (tooth-like), I bar (I section)

7

Material standard

Low carbon steel (ASTM A36, A1011, A569, S275JR, SS304, SS400,UK: 43A)

8

Galvanizing standard

CN: GB/T13912, US: ASTM (A123), UK: BS729

9

Steel grating standards

A. China: YB/T4001-1998

B. USA: ANSI/NAAMM (MBG 531-88)

C. UK: BS4592-1987

D. Australia: AS1657-1988

E: Japan: JJS