The tipping load is the maximum load that a crane or excavator can handle before the machine loses stability and begins to tip. It depends on the outreach (distance of the load from the pivot point), the counterweight, and the support base. The tipping load is NOT the permissible working load — the working load is always calculated with safety factors (typically 25–33 % reduction).
For mobile cranes, the tipping load is specified in load charts (capacity tables) for each boom length and position — as net working load after deduction of safety factors. Electronic load moment limiting (LML) continuously monitors outreach and load, stopping crane operation before the permissible load is exceeded.
For hydraulic excavators, the tipping load is less critical than for cranes, since excavators rarely operate at the tipping limit. Nevertheless, ISO 10567 values apply: the maximum lift capacity at the front must not exceed 75 % of the tipping load or 87 % of the hydraulic lifting force — whichever is smaller.