The open web design of steel joists and joist girders introduce a range of cost and performance advantages.
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.
Steel joists handle loads and span conditions that a tradition wood system cannot typically handle.
The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel.
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.
Allowing for seamless integration of mechanical electrical and plumbing mep systems.
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.
The k series joist web is a single bent bar running zig zag between top and bottom chords.
K series bar joists are designed for use typically with lighter loads and are most common in roof design.
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.
Open web steel joists are an engineered truss like construction component used to support loads over short and long spans alike.
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.
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.
In order to accurately design an owsj engineers consider the joist span between bearing points joist spacing slope.
Common bearing length for a k series joist on masonry is 4 6 and 2 1 2 on steel.
And making erection easier and faster.
Made of lightweight materials makes them a less costly alternative in building construction.
Dead load deflection is limited to l 360 and total load deflection is limited to l 240.
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.
K joists are used typically where shorter span conditions are required.
Open web steel joists are relatively light in weight fabricated in a shop setting and have a trussed web.
The steel joist institute discusses the key points of technical digest no.
6 design of steel joist roofs to resist uplift loads.
The spans are based on simple span joists.
Lh and dlh joists have heavier chords and web members for heavier loads and longer spans.
These joist must have stamped plans.
