Open Web Bar Joist Roof

All vulcraft joists and joist girders are designed and manufactured in accordance to the exacting specifications of the steel joist institute.

Open web bar joist roof.

K joists are used typically where shorter span conditions are required. The steel joist institute discusses the key points of technical digest no. The main function of an owsj is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to the structural frame i e. Steel joists handle loads and span conditions that a tradition wood system cannot typically handle.

Typically used in non residential construction steel joists and joist girders provide an economical system for supporting floors and roofs. 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. 6 design of steel joist roofs to resist uplift loads. Made of lightweight materials makes them a less costly alternative in building construction.

Open web steel joists are relatively light in weight fabricated in a shop setting and have a trussed web. Dead load deflection is limited to l 360 and total load deflection is limited to l 240. Open web steel joists are an engineered truss like construction component used to support loads over short and long spans alike. Common bearing length for a k series joist on masonry is 4 6 and 2 1 2 on steel.

These joist must have stamped plans. And making erection easier and faster. The k series joist web is a single bent bar running zig zag between top and bottom chords. The open web design of steel joists and joist girders introduce a range of cost and performance advantages.

Lh and dlh joists have heavier chords and web members for heavier loads and longer spans. Open web steel joists or bar joists or short span joists or long span joists k series kcs series lh series dlh series slh series joists girders and bridging are available in prime painted gray finish uncoated or galvanized. Of bearings and is based on uniformly loaded joists. These concentrated loads often include standard steel joists that are in turn supporting steel roof or floor deck.

The maximum span is measured o c. K series bar joists are designed for use typically with lighter loads and are most common in roof design. In order to accurately design an owsj engineers consider the joist span between bearing points joist spacing slope. In structural engineering the 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 spans are based on simple span joists. Topics include the design requirements of the asce sei 7 10 wind provisions for open web steel joists and joist girders and the end anchorage and bridging considerations for uplift loads on steel joists.