Webforge Aluminium Grating Deflection Data
Utilise the following table to select the appropriate grating profile for your application and project specifications.
![CORRECT SPAN CORRECT SPAN](https://az276020.vo.msecnd.net/valmontproduction/webforge-css/span-1.jpg?sfvrsn=fe27e693_0&Width=200&Height=200&ScaleUp=false&Quality=High&Method=CropCropArguments&Signature=887BA41F1529399B08DF5CBE679FA960)
CORRECT
![INCORRECT SPAN INCORRECT SPAN](https://az276020.vo.msecnd.net/valmontproduction/webforge-css/span-3.jpg?sfvrsn=cf27e693_0&MaxWidth=200&MaxHeight=200&ScaleUp=false&Quality=High&Method=ResizeFitToAreaArguments&Signature=83593BC054EF565E0BF47B7B5BEA8B6D)
INCORRECT
Spans in the darker shading (to the left of the heavy line) have a deflection of less than 5mm for a 4kPa uniformly distributed load.
Mass shown are untreated and unbanded.
Load deflection tables are arranged in rising strength order. See the 4kPa, 5mm deflection column.
U = Superimposed uniformly distributed load in kPa (100kg/m2 = 0.98kPa)
D = deflection in mm for the load U
Assumptions for load capacity is on single spans
Based on allowable stress of 115 mPa for aluminium.
Recommended minimum landing = grating depth greater than or equal to 25mm.