Equipment installed at grade level must be supported on what type of material?

Equipment installed at grade level must be supported on a level concrete slab or an approved material because this ensures stability and safety for the equipment. A level concrete slab provides a solid and uniform foundation that can effectively support the weight and operational demands of mechanical equipment. This is particularly important for systems like HVAC units, where improper support could lead to functional issues or safety hazards.

Using approved materials for support can also encompass other robust materials designed to provide a stable base, which may be specified in local codes or manufacturer recommendations. This approach helps prevent displacement, settling, or shifting of the equipment over time, thus maintaining operational efficiency.

On the other hand, options like wood, metal, or a gravel base may not meet the required criteria for effective long-term support. Wood may deteriorate or warp over time, while a gravel base, despite offering some drainage, might not provide the level and solid support necessary for mechanical systems.