It is important to ensure that the car will hold what percentage of capacity at the lowest landing before loading it at an upper floor?

In elevator maintenance and operation, ensuring safety during the loading of the elevator car is crucial. The correct answer is that the car must hold at least 125% of its rated load capacity at the lowest landing before loading it at an upper floor.

The reason for this percentage is to provide a safety margin that accounts for various factors that can affect the performance and stability of the elevator system. When the elevator is at the lowest landing, the weight distribution and mechanical factors can be more favorable. However, as the elevator ascends and is loaded at the upper landing, there are additional stresses and forces at play, including the dynamics of the load and potential variations in the loading conditions.

By ensuring that the car can support 125% of its rated capacity, it protects against the risk of overloading or mechanical failure when the elevator is in operation at an upper floor. This safety measure helps prevent accidents and ensures the longevity of the elevator system.

Factors that could influence why lower percentages (like 100% or 75%) would be inadequate include the elevator's braking capacity, cable strength, and other mechanical variables that must be accounted for to maintain safe operations. Higher percentages like 150% may present unnecessary constraints and are typically not required for standard operational