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Static Load and Deflection Table
Series 1: 30 mm Bearing Bar Spacing
1) U = Safe uniform load in kilopascals (KPa)
2) C = Safe concentrated load in kilonewtons per meter of grating width (KN/M)
3) D = Deflection in millimeters (mm)
4) Bearing bars are assumed to be simply supported and non-serrated.
5) Weight of the grating is with mill finish panel only.
6) Spans and loads to the right of the heavy line exceed a deflection of 5 mm for uniform loads of 4 KPa. This is the loading required for safe pedestrian comfort and may be exceeded at the discretion of the engineer for other types of loading.
7) Calculations are bassed on allowable bending stress of 171.6 MPa (0.66 Fy).
Panel Width (mm)
These widths are for panels with 5 mm bearing bars. For 3 mm, subtract 2 mm. Panel widths in table do not include cross rod extensions which can add 6mm (3mm each side) to panel width.
Serrated Conversion Factors
Apply these conversion factors to the allowable loads (U and C) and to the deflection values when serrated bearing bars are specified. The serrations reduce the load carrying capacity of the bearing bars.

Series 2:40 mm Bearing Bar Spacing
1) U = Safe uniform load in kilopascals (KPa)
2) C = Safe concentrated load in kilonewtons per meter of grating width (KN/M)
3) D = Deflection in millimeters (mm)
4) Bearing bars are assumed to be simply supported and non-serrated.
5) Weight of the grating is with mill finish panel only.
6) Spans and loads to the right of the heavy line exceed a deflection of 5 mm for uniform loads of 4 KPa. This is the loading required for safe pedestrian comfort and may be exceeded at the discretion of the engineer for other types of loading.
7) Calculations are bassed on allowable bending stress of 171.6 MPa (0.66 Fy).
Panel Width (mm)
These widths are for panels with 5 mm bearing bars. For 3 mm, subtract 2 mm. Panel widths in table do not include cross rod extensions which can add 6mm (3mm each side) to panel width.
Serrated Conversion Factors
Apply these conversion factors to the allowable loads (U and C) and to the deflection values when serrated bearing bars are specified. The serrations reduce the load carrying capacity of the bearing bars.

Series 3:60 mm Bearing Bar Spacing
1) U = Safe uniform load in kilopascals (KPa)
2) C = Safe concentrated load in kilonewtons per meter of grating width (KN/M)
3) D = Deflection in millimeters (mm)
4) Bearing bars are assumed to be simply supported and non-serrated.
5) Weight of the grating is with mill finish panel only.
6) Spans and loads to the right of the heavy line exceed a deflection of 5 mm for uniform loads of 4 KPa. This is the loading required for safe pedestrian comfort and may be exceeded at the discretion of the engineer for other types of loading.
7) Calculations are bassed on allowable bending stress of 171.6 MPa (0.66 Fy).
Panel Width (mm)
These widths are for panels with 5 mm bearing bars. For 3 mm, subtract 2 mm. Panel widths in table do not include cross rod extensions which can add 6mm (3mm each side) to panel width.
Serrated Conversion Factors
Apply these conversion factors to the allowable loads (U and C) and to the deflection values when serrated bearing bars are specified. The serrations reduce the load carrying capacity of the bearing bars.

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