Open Web Bar Joist Roof

Common bearing length for a k series joist on masonry is 4 6 and 2 1 2 on steel.

Open web bar joist roof.

Typically used in non residential construction steel joists and joist girders provide an economical system for supporting floors and roofs. These joist must have stamped plans. K joists are used typically where shorter span conditions are required. Bar joist our open web steel joist series are designed to meet the specifications of k kcs lh series joist we also manufacture specialty joist per requirement.

K series bar joists are designed for use typically with lighter loads and are most common in roof design. Steel joists handle loads and span conditions that a tradition wood system cannot typically handle. All vulcraft joists and joist girders are designed and manufactured in accordance to the exacting specifications of the steel joist institute. Made of lightweight materials makes them a less costly alternative in building construction.

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. Of bearings and is based on uniformly loaded joists. Open web steel joists are an engineered truss like construction component used to support loads over short and long spans alike.

And making erection easier and faster. 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 k series joist web is a single bent bar running zig zag between top and bottom chords. In order to accurately design an owsj engineers consider the joist span between bearing points joist spacing slope.

Dead load deflection is limited to l 360 and total load deflection is limited to l 240. 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. The open web design of steel joists and joist girders introduce a range of cost and performance advantages. The maximum span is measured o c.

Allowing for seamless integration of mechanical electrical and plumbing mep systems. The steel joist institute discusses the key points of technical digest no. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. Open web steel joists are relatively light in weight fabricated in a shop setting and have a trussed web.

6 design of steel joist roofs to resist uplift loads. Lh and dlh joists have heavier chords and web members for heavier loads and longer spans.