Conduit Hangers

For EMT, RMC, and IMC, hangers are typically spaced no more than 10 feet apart, with additional support required within 3 feet of terminations such as junction boxes or fittings. PVC conduit, being more flexible, requires closer spacing, generally no more than 3 feet apart, to prevent sagging. Flexible metal conduit (FMC) requires support at intervals no greater than 4.5 feet, with hangers placed within 12 inches of terminations. These spacing guidelines are based on the National Electrical Code (NEC) and may be further refined by local codes, ensuring proper conduit alignment and compliance with safety standards.

Most hangers are labeled with the conduit types and sizes they support, ensuring proper fit and secure installation. Hangers for EMT are often lighter-duty compared to those designed for IMC or rigid conduit, which require more robust materials and construction to handle the heavier weight. Many hangers are multi-purpose and accommodate a range of conduit types, but verifying the manufacturer’s specifications is essential to ensure compliance with project requirements and code standards.

Steel and stainless steel hangers typically offer higher load capacities compared to aluminum or plastic options, with ratings commonly provided by the manufacturer. For example, standard steel hangers may support loads ranging from 25 to 200 pounds or more, depending on the conduit size and mounting configuration. Load capacities should also account for the combined weight of the conduit, wiring, and environmental factors like vibration. Manufacturers provide detailed specifications for their products, including maximum load ratings, to ensure safe and compliant installation. Always refer to these ratings and local code requirements when selecting conduit hangers for specific applications.

Heavy-duty hangers made from robust materials like stainless steel or reinforced galvanized steel are often suitable, and models with locking mechanisms or rubber insulation can provide additional stability and vibration dampening. Adjustable or pivoting hangers may also be used to accommodate movement while maintaining support. When selecting hangers for high-vibration environments, it is essential to verify that they meet relevant industry standards, such as those for seismic or dynamic applications, and follow manufacturer guidelines to ensure reliability and compliance.