How to Make Notches in Wood to Fit Hanger Straps

Hanger straps are a common component in the installation of air conditioning ductwork. These thin metal ribbons attach to the mounting surface and wrap around the duct, forming a strong point of contact that keeps the duct in place. At times, proper installation of your hanger strap requires you to pass the strap through a wooden crossbeam or support stud. The safest and most effective way to perform this operation is by sawing out a small notch in the wood.

Tape measure
Pencil
Hack saw
Rubber mallet

Instructions

- 1
  Measure the width of your hanger strap, using a tape measure.
- 2
  Determine the best notch placement for your project. The exact placement will vary depending on the size and length of the duct, as well as the shape of the wood. Mark the location with a pencil.
- 3
  Mark both sides of the wood with a pencil, to a depth that corresponds to the width of the hanger strap. Draw a perpendicular line at the end of each mark, to create an easily visible stop-point for the notch.
- 4
  Orient a hacksaw across the top of the wood, so that the blade aligns with the marks on each side.
- 5
  Saw through the wood with the hacksaw, until the saw reaches your pre-marked stop-points.
- 6
  Press the hanger strap into the notch. If the notch is tight, tap the strap in lightly with a rubber mallet.

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