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Hot DIP Galvanized Steel Stair Treads with 25 x 3 to 100 x 8 Bearing Bar and ANSI/NAAMM Standard for Step Ladders

Brand Name:Gnee
Minimum Order Quantity:2PCS
Supply Ability:300000 Square Meter/Square Meters per Month
Product Details
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Hot DIP Galvanized Steel Stair Treads

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25 x 3 to 100 x 8 Bearing Bar Steel Stair Treads

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ANSI/NAAMM Standard Galvanized Steel Grating
Product Description
Hot DIP Galvanized Steel Stair Treads for Step Ladders
Bearing Bar Specifications
  • Plain & Serrated Type: 25 x 3 mm to 100 x 8 mm
  • I-Section Type: 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 mm
Bearing Bar Pitch (Center to Center)
  • Standard Pitches: 12.5, 25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, 80, 100 mm
  • Recommended: 30, 40, 60 mm
  • American Standards: 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)
  • Custom specifications available upon request
Material Options
  • Mild Steel (Low Carbon Steel)
  • Stainless Steel
Surface Treatment
  • Untreated
  • Painting
  • Hot DIP Galvanizing
International Standards Compliance
  • China: YB/T4001-1998
  • USA: ANSI/NAAMM (MBG531-88)
  • UK: BS4592-1987
  • Australia: AS1657-1985
  • Japan: JJS
Steel Stair Treads Technical Specifications
Standard Grating Specifications
Pitch of Bearing Bar Cross-bar Pitch 25×5 32×5 40×5 45×5 50×5 55×5 60×5
30 100 G255/30/100 G325/30/100 G405/30/100 G455/30/100 G505/30/100 G555/30/100 G605/30/100
50 G255/30/50 G325/30/50 G405/30/50 G455/30/50 G505/30/50 G555/30/50 G605/30/50
40 100 G255/40/100 G325/40/100 G405/40/100 G455/40/100 G505/40/100 G555/40/100 G605/40/100
50 G255/40/50 G325/40/50 G405/40/50 G455/40/50 G505/40/50 G555/40/50 G605/40/50
60 50 G255/60/50 G325/60/50 G405/60/50 G455/60/50 G505/60/50 G555/60/50 G605/60/50
Maximum Stair Tread Lengths
Steel Grating Specification 25×3 mm 25×5 mm 32×5 mm
Bearing Bar Pitch 30mm 550 mm 900 mm 1300 mm
Bearing Bar Pitch 40mm 450 mm 750 mm 1200 mm
Product Images
Hot DIP Galvanized Steel Stair Treads installation example showing industrial step ladder application Close-up view of Hot DIP Galvanized Steel Stair Treads surface texture and construction details
Product Summary

Hot DIP Galvanized Steel Stair Treads for Step Ladders Bearing Bar Specifications Plain & Serrated Type: 25 x 3 mm to 100 x 8 mm I-Section Type: 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 mm Bearing Bar Pitch ...

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