In the construction equipment context, tonnage refers to the weight class of a machine, measured by operating weight in metric tonnes. Tonnage is the most important classification feature and determines performance capability, transport requirements, costs, and application scope. Typical classes: mini excavators (< 6 t), midi (6–10 t), medium (10–30 t), heavy (30–50 t), mining (> 50 t).
Tonnage correlates directly with digging force, reach, and lifting capacity. Rule of thumb: a 20-tonne excavator has roughly twice the digging force of a 10-tonne excavator. However, transport costs and space requirements increase disproportionately — a 50-tonne excavator requires heavy-haul transport with escort vehicles, while a 20-tonner can be transported on a standard lowboy trailer.
Selecting the correct tonnage is one of the most important decisions in equipment procurement: too small = too slow, too large = unnecessary costs and restricted accessibility. Experienced contractors calculate optimal tonnage based on excavation volume per hour, digging depth, reach, and transport logistics specific to the project.