What are chocks, blocks, jacks, and chains classified as in weight calculations?

Chocks, blocks, jacks, and chains are classified as tare weight items in weight calculations. Tare weight refers to the weight of packaging or equipment that is not part of the net weight of the cargo or contents being measured. In aviation, accurate weight calculations are critical for safe takeoff, flight, and landing operations, and it is essential to account for all items that are part of the weight of the aircraft but do not contribute to its operational payload.

Chocks and blocks are used to prevent the aircraft from moving when parked, jacks are utilized for lifting the aircraft for maintenance, and chains can secure the aircraft. Each of these items has a weight that needs to be considered separately from the actual load being carried by the aircraft, hence their classification as tare weight items. This ensures that the weight calculations reflect the actual load that the aircraft will be carrying, which is essential for flight safety and regulatory compliance.