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Dibond® Deflection Data

Deflections of Dibond® material under load are demonstrated by the amount of spacing between supports across the short dimension of the panel in comparison to the panel deflection.

Deflections of Dibond® material under load are demonstrated by the following charts. The charts were developed to demonstrate the amount of spacing between supports across the short dimension of the panel in comparison to the panel deflection.

Deflections in excess of 2” should not be allowed in any case as this may result in permanent deformation of the aluminum skins.

To determine support spacing, choose the chart for the appropriate Dibond® thickness. Locate the wind load curve (provided in psf) at the top of the chart (this data is normally available from local building code officials). Follow the curved line for the chosen wind load until it is below the bold “Maximum Allowable Deflection” line on the chart. Once it is below this line, follow the point on the graph straight down to determine the minimum support spacing.

For example:

What is the minimum support spacing needed for 3mm Dibond® with a designated wind load of 20 psf?

Locate the 20 psf wind load curve on the 3mm Dibond® chart. Follow the curve until it is below the bold Maximum Allowable Deflection line on the chart. Once this point is located, follow a line going straight down. The maximum spacing is approximately 2.1 feet with a corresponding deflection of slightly over 1”.

Dibond® Deflection Data
Dibond® Deflection Data
Dibond® Deflection Data