Steel cord conveyor belt specifications are written in three different languages, which is where most mis-specified orders begin: belt width and cord pitch come from the manufacturer, ST rating from the tension calculation, and cover thickness from the material being carried. This guide ties the three together. It explains what each figure in a designation controls, how the ST class is chosen from calculated tension with a safety factor rather than habit, why cord pitch and diameter change splice length and pulley diameter limits, and how cover grade matches blasted rock, screened ore or hot clinker. Carry capacity is then worked through as a chain rather than a single number: troughing angle, belt speed, load cross-section, and the idler spacing that keeps sag inside limits. Tables give ST classes against breaking strength, cover grade against application, and the pulley and take-up figures that must be confirmed before an order is released.