Lyftkapacitet

Lyftkapacitet refers to the maximum weight that a lifting device or system can safely lift under specified conditions. It is typically expressed as Safe Working Load (SWL) or Working Load Limit (WLL) and stated in units such as kilograms or tonnes. The term is used for equipment ranging from cranes, hoists, and forklifts to other lifting gear and fixed lifting installations.

Determination and influencing factors: Capacity is determined by the design, materials, and testing of the equipment. It is not a single fixed value; it depends on configuration and use. Factors include reach or radius, lifting height, angle of the hoist line, pulley arrangements, and the condition of rigging, hooks, and supports. For forklifts, the capacity is specified at a standard load center (the distance from the fork to the load’s center of gravity); for cranes, capacity is described in terms of load moment at specific radii. De-rating may occur due to wind, uneven ground, slope, or dynamic loads during movement.

How capacity is used in practice: Operators consult load charts to determine permissible loads for different positions and configurations. The actual load must not exceed the stated WLL for the given setup, and considerations such as rigging, load balance, and potential dynamic effects should be accounted for. Many systems include overload protection, indicators, or interlocks to help prevent exceeding capacity.

Safety and standards: Lifting equipment is subject to safety regulations, inspections, and certifications according to national or international standards. Regular maintenance, personnel training, and written operating procedures are essential. Load testing and proper marking of capacity are common requirements to ensure ongoing safe operation.

Applications and scope: The concept is central in construction, manufacturing, logistics, and material handling, where reliable lifting capacity is essential for safety and efficiency.