Specification of Steel Grating

Specification of Steel GratingSpecification of Steel Grating

  1. The shape of bearing bar: Plain type (may be omitted in the symbol of steel grating), Serrated type and I-Shape type

  2. Bearing bar pitches can be 12.5, 15, 20, 30, 30.16, 32.5, 34.3, 40, 60mm, of which 30mm & 40mmare recommended.

  3. Cross bar pitches can be 38, 50, 60,100mm, of which 50mm & 100mm are recommended.

  4. Surface treatment: Hot-dip galvanizing, paint or other anti-corrosive coatings are available, of which hot-dip galvanizing is generally recommended.

  5. Material: Q235 in line with GB/T700 steel

  6. Tolerance

  The allowed deviation of length is +0/-5mm, while the allowed deviation of width is +/-5 mm.

  The non-perpendicularity of bearing bar is allowed no more than 10% of width of bearing bar.

  Cross bar surface should not surpass bearing bar surface 1mm, beginning & end of cross bar should not surpass the end surfaces of two sides of grating 2mm.

  7. Standard:

Specification of Steel Grating
  Instruction of Selecting Steel Grating:

  1) Light & medium duty Maximum recommended spans

Light & medium

  2) Heavy duty Maximum recommended spans

Heavy duty


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