There are 5 important steps to ensuring safety is a main concern. The first step is completing a Walk-Around Inspection in order to assure that the model is visually safe. Then assess if the work location is safe to use with a Worksite Assessment. The Function Test is the third step so as to determine whether or not the unit is working in a safe manner. The 4th thing to consider is Proper Operation, so as to determine whether or not the unit is operating safely. Last of all, Proper Shutdown must be checked in order to make sure the model is in a safe place and is capable of shutting down correctly.
At the center of the 5 steps and this regulation, there is a machinery which stands on a triangular footprint and lifts heavy weights to impressive heights. The main objective is to maintain the telehandler upright, but surely there are risks.
The two front wheels, and the rear-axle pivot point make up the triangular base of the telehandler. Typically the rear axle oscillates and hence, the back wheels are not a part of the base. The telehandler remains upright so long as the machine's center of gravity, that is defined as the point in 3 dimensions around which the weight of the equipment is balanced, stays oriented inside the stability triangle.
When a load is positioned on the forks while the boom is down, the center of gravity down and forward. The load if lifted will move the center of gravity upwards to the rear. At the same time, when this happens, the stability triangle shrinks. Therefore, the higher you lift a load, the less of a margin for error you have as the stability triangle lessens.
When the stability triangle is small, it leaves less room for the center of gravity to move left or right. It is this wandering action that can change the stability triangle and leave less room for the frame to remain balanced if it is not perfectly level. Like for example, imagine the center of gravity resembling a plumb bob hanging from the boom. You can always find the center of gravity somewhere on a totally vertical line between the center of the ground and a point on the boom. If the frame is not level, the center of gravity would not be oriented over the centerline of the machinery. The stability triangle is continuously aligned with the telehandler's centerline.