Metal Trusses to Increase Your Barn's
Headroom, Strength,
& Aesthetics

Bar Joist Trusses to Increase Your Barn's
Headroom Strength,
& Aesthetics

Storage Space

Structural Integrity


Bar Joist Trusses for Sale

Wooden trusses are often the go-to product for ag buildings, but they have a few problems: they reduce usable headroom, take longer to install, and do not have the enduring quality of steel.

At Buffalo River Truss, we offer a better solution for your new structure: bar joist trusses!

Headroom & Storage

Structural design combined with fewer trusses allow for more overhead storage space when working with larger items.

Install Times

Pole barn truss systems typically install faster than wooden trusses- reducing building installation time!


Enjoy an open and airy interior due to the strength of steel, truss design, and

Structural Integration

Besides being steel, our trusses mount on the top and side of the posts and integrate the post into the roof structure.

Why Work With Buffalo River Truss?

We know how important it is to find reliable suppliers for your construction projects. That’s why we focus on the following:

  • Keep standard truss sizes in stock for shorter lead times
  • Engineer approved drawings on all standard trusses
  • Keep our set of engineer drawings updated and to code
  • Offer trusses up to 100’ in width on a variety of roof pitches
  • Customer satisfaction through rapid problem resolution
  • High-capacity production and raw materials kept in stock

“Top notch service and super quick turnarounds. I dropped in today and picked up a set of 30 foot trusses. Thanks guys, you saved the day!”

We Make Getting Bar Joist Trusses Simple

  • 1

    Contact Us

    Our team will help determine the trusses you need based on your building’s blueprint or drawings.

  • 2

    Scheduling & Engineering

    We keep you updated on lead times and any additional required engineering.

  • 3


    Receive your new trusses and enjoy the faster installation & increased storage space!

Bar Joist Roof Truss FAQ's

A bar joist is what we use to eliminate posts to create wider openings to enter the buildings. Let's say you want to install a 16" door on the side of your building but your posts are on 10 ft centers. You will need a bar joist to span between the posts that create the 16' opening. This bar joist will have attachments to bolt the truss to at the regular 10' sequence.

A bar joist is used for flat non pitched applications. They are usually built heavier for larger load-bearing capacity. The typical use for a bar joist is carrying the end of trusses for larger openings in the buildings, bridges to span small creeks, and joists for mezzanines porches or decks.

Like many other structural components, bar joists can span as far as they are designed to. We have built them as long as 50 ft. The question is really about whether it is cost-effective for the application.

A bar joist is built to the engineer's specs for the load required for the application. We can build a bar joist to hold the end of any truss we manufacture.

A bar joist carries a flat load. It supports the end of a truss or is used for joists or small bridges.

Typically people view a bar joist for flat applications. This bar joist configuration has been redesigned for pitched roof trusses. Bar joists also span between supports for a roof structure as a purlin in some cases.

The design process is looking at a customer's needs, length, load it is holding, etc., and turning these specs into engineering. Engineering then designs the configurations and material sizing needed to carry the loading requirements per IBC or local building codes.

Our standard lead time for orders is two weeks. Actual production time depends on the size of the bar joist.

Transform Your Next Riding Arena, Pole Barn, or Ag Structure with Bar Joist Trusses!

If you are building a new ag structure but have some concerns or frustrations about traditional wooden roof trusses, then take a look at bar joist trusses.

Bar joist roofs not only increase your building's headroom and interior aesthetics but are also faster to install and will increase your barn's structural integrity.

Call us today to see how we can take your structure to the next level!

Bar joist trusses allow for a more efficient structural shape than just regular wood trusses. A bar joist ​​is a standard truss made with angles for the top and bottom chords, joined by welding to a web made of a continuous bent rod. It is used almost exclusively to support roofs and can span up to 150 feet (45 meters). 

A bar joist, also called an open web steel joist, is a lightweight steel truss consisting, in the standard form, of parallel chords and a triangulated web system, proportioned to span between bearing points.

The main function of a bar joist truss is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to the structural frame, such as a beam and column.

According to Wikipedia,

In order to accurately design a bar joist truss, engineers consider the joist span between bearing points, joist spacing, slope, live loads, dead loads, collateral loads, seismic loads, wind uplift, deflection criteria and maximum joist depth allowed. Many steel joist manufacturers supply economical load tables in order to allow designers to select the most efficient joist sizes for their projects.

While bar joists can be adapted to suit a wide variety of architectural applications, most engineers suggest that it would be best if the economy utilized standard details, although that may vary from one joist manufacturer to another. Some other shapes, in addition to the parallel top and bottom chord, are single slope, double slope, arch, gable, and scissor configurations. Not all joist manufacturers supply these shapes, and if they do the cost would reflect the level of complexity involved with designing and creating them.

The Building Design Construction Network has recommended a few things to do and not to do when working with steel joists such as bar joist trusses.

First, recognize how and when to specify total uniform load or factored load and/or net uplift load, and when loads need to be broken out by load category and combinations.

Second, know the limits of a concentrated load applied between panel points before an additional web is needed on the joist. The Steel Joist Institute’s new “100-pound rule” clarifies these limits.

Third, install bridging early and follow the proper procedures to avoid safety problems, such as a partial building collapse.

Fourth, designate a field representative to inspect the joists during construction and ensure that components are being installed correctly. Ideally, a representative of the team should walk the job site before completion and look for situations where loads aren’t handled correctly.

At Buffalo River Truss, it is our goal to make building large structures as simple and safe as possible. Our bar joist trusses stem from that commitment. 

Contact us today to see how we can set you up with bar joist trusses of your own!