Bar Joists

Steel joists handle loads and span conditions that a tradition wood system cannot typically handle. Therefore steel bar joists or also known as open web steel joists for framing floors and roofs offer many advantages when compared to a wood truss or steel beam system. Made of lightweight materials makes them a less costly alternative in building construction. With a diverse array of designations steel joists are able to span up to 144′ and range in depth from 8” to 120”.

Joist FAQs:

What is a bar joist — (OWSJ) Open Web Steel Joist – steel joist?

A joist is a structural steel component used to support floor or roof systems in commercial and industrial buildings. Joists span between structural supports like beam or girders to carry loads.

What is a steel girder? What’s the difference between girder and a bar joists ?

A steel girder is a large steel truss that supports joists or structural elements. Girders carry heavier loads and often support joists that are lighter and span shorter distances.

How do I read joist designations?

Joists are labeled like 24K6 or 36LH10: the first number = depth (inches), the letter = series, and the last number = strength. Always verify with structural drawings. Always confirm with your structural drawings.

How much does a joist cost? what is the cost per foot?

Cost varies by steel market, span, load, finish, and freight. Projects also factor in labor for fabrication, detailing and engineering time. As such, we are unable to bid projects on a $/ft basis. Contact your nearest branch for accurate pricing.

What finishes are offered for joists?

Typical finishes include shop primer, bare steel, or galvanized. Selection depends on exposure and Engineer of Record (EOR) requirements. In rare applications epoxy coatings are available.

What lead times should I expect for joists?

Joist lead time typically ranges from 8 to 14 weeks depending on project complexity and responsiveness. Joists are often purchased upfront to get in the production queue while approvals are underway. Delays in drawings, RFIs, or EOR feedback can extend the schedule. Here’s the general breakdown:

• • • 2–4 weeks: Detailing and preparation of joist submittals (shop drawings, calculations)
    • 2+ weeks: Engineer of Record (EOR) review and approval of shop drawings (often a contractual minimum)
    • 4–8 weeks: Joist design, fabrication, and shipping by the manufacturer

What information is needed to get a joist quote?

To quote joists, we need to review structural drawings to account for all present loading provided by the EOR.

Can joists be modified in the field?

No, Field modifications to joists are not allowed unless reviewed and approved by the Engineer of Record and the joist manufacturer. Cutting, welding, or altering joists on-site may void structural integrity and certification.

Since 1996 O’Donnell Metal Deck has been fueled by a high performing team you can count on. The order process is seamless from the time you request a metal deck quote, place an order and metal decking is delivered.

Our multiple stock & manufacturing locations combined with years of experience allow O’Donnell Metal Deck to service any job throughout the USA. Our process allows reduces the end-to-end logistic costs for delivering what you need when you need it. Contact your local branch to get started.

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