metal floor joists

Attaching Unistrut to Bar Joist with Joist Wrap Method

Joist Wrap is the third and final method we will go over in our series on how to attach Unistrut channel to bar joist. In situations where the bottom chord cannot be attached to, or where the engineer has specified the top chord as the load bearing chord, the joist wrap method is the preferred way to safely and effectively transfer the load that would normally be born by the bottom chord to the top chord.

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UNISTRUT-JOIST-WRAP: How to Attach Unistrut to Bar Joist Using Joist Wrap Method

Which Hardware and Fittings Should I Use?

There are many factors that go into determining the proper channel, fittings and hardware combination to use in your joist wrap. Some of these factors include what has already been specified

How to Attach Unistrut to Bar Joist with Threaded Rod

Unistrut channel is attached to the bottom chord of the bar joist - either above or below the chord. The channel and channel nut rest on one side of the chord, while on the other are the flat plate fitting and mounting hardware. The chord is sandwiched between the assembly components and a length of threaded rod runs through everything.

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UNISTRUT-JOIST-ROD: How to Attach Unistrut to Bar Joist Using Threaded Rod

Which Hardware and Fittings Should I Use?

The size of the threaded rod will determine what size hardware you will need. The

What are Bar Joists?

Let's start at the beginning with what a bar joist is and what it's used for. Steel joist is a structural framing component used in floors and roofs to provide added support and even weight distribution.

Bar joists provide light weight strength that is able to span long distances, between girders, typically running in the same direction as a beam, or even acting as a replacement for beams. A metal joist consists of two parallel chords which are joined to each other via a triangular framework of intersecting supports known as webbing.

How to Attach Unistrut to Bar Joist with Beam Clamps

Now that we know what bar joists