How to Support Copper Tubing Against Wood Joists


When running hot and cold copper water pipe tubing from the water supply source across the bottom faces of wood joists in a basement, the pipes must be pinned tight against the joists--floor beams. A number of different clamp and hanging devices have been designed and manufactured over the years. Any of them works well. It's just a matter of personal preference which one you'll select for your installation.

Things You'll Need

  • Tube clamps
  • One-hole clamps
  • Self-nailing pipe hook
  • U-hook
  • Perforated hanging strap
  • Electric drill with screw head bit
  • Screws
  • Nails
  • Hammer
  • Tin snips
  • Press a tube clamp against the face of the copper tubing where it's running parallel to the joists. The tube clamp matches the curve of the copper tube and has a bent tab on either side of the curved convex shape with a hole punched into each tab. A screw is inserted into each hole, and each tab is screwed to the facing edge of the floor joist. The one-hole tube clamp is identical to the tube clamp, except it only has one tab and one hole for securing the clamp to the floor joist.

  • Pound a self-nailing pipe hook into a floor joist when the copper tubing is running parallel to the floor joist, by first pushing it up so the tubing lies inside the V of the hook. The self-nailing pipe hook must be located so its two prongs are pressed against one side of the joist. Push it all the way up until the top of the copper tubing is against the bottom edge of the joist before hammering the two right angle points of the hook into the side of the joist. The U-hook works the same way and is positioned against the joist like the self-nailing hook, except nails or screws are used to secure each of the two loops at the top of the U-hook to the joist.

  • Cut a length of perforated hanging strapping. This is malleable metal strapping with holes punched in it at regular intervals. Press the copper tubing against the joist, and form the strip of perforated hanging strap around the bottom curved face of the copper tubing. Press each end of the strap up and against each side of the joist and either pound a nail through a hole into the joist on each side or put a screw through each hole.

Tips & Warnings

  • When working overhead pounding in nails or inserting screws in joist be sure to were safety glasses to protect your eyes.

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