What should be avoided to prevent maximum stress on an aerial device?

To prevent maximum stress on an aerial device, avoiding long extensions at low angles is crucial. When an aerial device, such as a ladder or platform, is extended to a significant length while positioned at a low angle, it places an excessive load on the device. The geometry of the aerial device is designed for optimal performance and safety when used within specific extension and angle parameters. Low-angle extensions create a larger leverage effect, increasing the forces exerted on the rigging and structure of the aerial device, which can lead to structural failure or decreased operating efficiency.

Crucially, maintaining correct angles and extension length helps ensure that the weight is distributed properly throughout the aerial device, enhancing stability and safety during operation. Proper training and adherence to manufacturer guidelines are essential for fire crews when operating aerial devices to reduce the risks associated with improper angles and excessive extension.