Backing plates add substantial strength and prevent damage and safety hazards in situations where there is an absence of a solid mounting surface. Backing plates distribute a load from a single point of pressure to a wide area. Backing plates increase holding strength and rigidity substantially by using the strength of all fasteners against a single point of pressure.
Backing plates should be used in the following situations:
- If the depth of the mounting surface is less than the length of the recommended fastener, a backing plate should be used and the fasteners should be switched to machine screws with proper washers and nuts.
- If it is known that substantial force will be exerted on a component it is best to mount using a backing plate.
- If there is regulation, specification or previous use showing use of a backing plate replacement should be done using a backing plate.