Steel Roof Joist Chord Reinforcement

The first web member on either end of a joist or joist girder which begins at the top chord at the seat and ends at the first bottom chord panel.

Steel roof joist chord reinforcement.

To prevent sag in 2x6 s and strengthen at same time you could secure lengths of stainless steel or galvanized cable attach at each end of individual ceiling joists have cable go over a one or two spreaders or strut projecting down from the underside of the ceiling joist maybe 12 14 or so as not to lose too much headroom these could. Steel joist institute publication technical digest no. Although standard k series including kcs series and standard lh series joists are designed specifically to support uniformly distributed loads applied to the top chord research conducted by the steel joist. A floor or roof covering made out of gage metal attached by welding or mechanical means to joists.

2 are several details that have been used to reinforce the top or bottom chords of joists. Sji members offer guidance about how and when to specify loads. A new rule from the steel joist institute clarifies when local reinforcement of joists is required for chord loads away from panel points. Provide a lightweight low cost rigid floor assembly c joist components provide an economical lightweight alternative to open web trusses bar joists engineered lumber cast in place or hollow core floor assemblies.

From the bottom chord towards the end of the joist. Structural track usually in the same gauge as the. Open web steel joists are an engineered truss like construction component used to support loads over short and long spans alike. New sji rule on steel joists steel joist do s and don ts recognize how and when to specify total uniform load or.

Depending on loads and spans c joists are typically spaced at 12 16 19 2 or 24 on center spacing. Chord reinforcement typical reinforcement details top chord more difficult to reinforce since the floor or roof. Steel joist institute states. Steel joists and girders steel deck the hambro composite floor system econox prefabricated buildings and murox insulated wall panels.

Top chord reinforcement usually presents a bigger problem than the bottom chord because roof or floor deck is usually in place and interferes with the placement of reinforcement and welding. Typically used in non residential construction steel joists and joist girders provide an economical system for supporting floors and roofs. Both open web steel joists and joist girders will be referred to as joists in this digest. Steel joists joist girders.

Panel points have a negligible effect on the overall performance of the joist.