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The GREENFIELD 308-3 is a galvanized steel riser clamp designed to support vertical piping by transferring pipe loads to structural building members. Rated for 500 pounds load capacity, it clamps securely around 3-inch pipe to distribute weight evenly and reduce stress on the pipe and adjacent connections. The galvanized finish provides corrosion resistance for long service life in demanding environments. Licensed plumbers and pipefitters install this clamp in commercial and industrial piping systems where vertical pipe runs require positive load support at each floor or structural penetration.
The 308-3 is suited for use in commercial and industrial mechanical rooms, multi-story building riser systems, and process piping installations. It is typically installed where vertical pipe must be anchored to a structural member such as a floor deck or beam to prevent pipe movement and carry the weight of the piping above. The Series FIG 308 designation identifies this clamp configuration for specification and procurement purposes. Plumbers and mechanical contractors working on new construction or retrofit projects use this clamp in both wet and dry piping applications.
Designed as an OEM-style riser clamp for 3-inch vertical pipe installations in commercial and industrial piping systems.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable mechanical codes such as the International Plumbing Code (IPC) and local jurisdictional requirements. Shut off the piping system and depressurize the line before installing or repositioning any pipe clamps or supports. Ensure the structural member receiving the clamp load is rated to handle the transferred pipe weight. Do not exceed the rated 500-pound load capacity of the clamp.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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