What are open webbed steel joists used for?
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. beam and column.
What are the major series of open web steel joists?
Joist Girders, K-Series, LH-Series, and DLH-Series shall be open web, in-plane load-carrying steel members utilizing hot-rolled or cold-formed steel, including cold-formed steel whose yield strength has been attained by cold working.
How are open web steel joists made?
Today, open web steel joists are one of the most commonly used framing systems for floors and roofs in buildings. These joists were made by pressing the sheets into the form of channels and welding them back-to-back, giving the appearance of light I-shaped beams.
What is AK series joist?
K-Series joists are designed for use typically with lighter loads and are most common in roof design. K-Series Joists are used typically where shorter span conditions are required.
What is the difference between trusses and joists?
While much different in design and function, joists and trusses are often used together in construction projects. While joists support the weight of floors and ceilings, trusses have a wide variety of applications, including supporting roofs and in bridge design.
What are steel joists made of?
Steel joists (or open web steel joists in Canada) are typically made of hot-rolled or cold-formed steel with yield strength of 50 ksi and are typically designed and constructed in accordance with standards developed by the Steel Joist Institute.
What is an open web truss?
Open-Web Trusses. Since its introduction in 1960, the open-web truss has become one of the most widely used engineered wood building products in commercial construction. Open-web trusses are lightweight, easy to install, and have nailable chords for easy attachment of roof decking and ceiling materials.
What is a joist beam for an opening?
A joist is a horizontal structural member used in framing to span an open space, often between beams that subsequently transfer loads to vertical members. When incorporated into a floor framing system, joists serve to provide stiffness to the subfloor sheathing, allowing it to function as a horizontal diaphragm.
What is steel joist?
In structural engineering, the open web steel joist (OWSJ) is a lightweight steel truss consisting, in the standard form, of parallel chords and a triangulated web system, proportioned to span between bearing points.
What is a joist girder?
Joist Girders are open web steel trusses that serve as primary framing members. They are designed as simple spans to support concentrated loads for a floor or roof system. These concentrated loads are normally considered to act at the top chord panel points of the Joist Girders.