H-122-OS strut channels are manufactured by a series of forming dies, or rolls, which progressively cold work the strip steel into the desired channel configuration. This method produces a cross-section of uniform dimensions within a tolerance of ±0.015" on outside dimensions. It is a heavy-duty channel capable of carrying heavy loads. This product is commonly used for heavy applications and supporting over long spans. It is available "slotted" or with several other pre-punched hole and weld configurations.