According to the rule of thumb, the mass of an equipment foundation should be how many times the weight of the machinery it supports?

The recommended rule of thumb for designing an equipment foundation states that the mass of the foundation should typically be between three to five times the weight of the machinery it supports. This guideline is crucial for ensuring stability and vibration control, as a heavier foundation can absorb and dampen the dynamic forces generated by machinery during operations.

The reason for this specific range lies in the need for the foundation to effectively counteract not only the static weight of the equipment but also the additional dynamic forces that can occur during operation, such as vibrations and shocks. Insufficient mass might lead to resonant frequencies that could compromise the structural integrity of both the machinery and the foundation itself. Thus, the three to five times ratio is regarded as a safe and effective practice in machine design to optimize performance and safety.