What Is A Bar Joists in Construction ?
What Is A Bar Joists in Construction ?
A bar joist is a type of structural component used in framing floors or roofs, made up of parallel chords connected by intersecting supports known as “webs.” They have a similar design to trusses, but are generally smaller and lighter.
They are designed to distribute the weight of a floor or roof to the walls or foundations at either end. They can be made of wood, steel, or composite materials, and must be carefully selected based on the loads they will support, such as the weight of building materials, people and furnishings.
They are often identified by an alpha-numeric code such as 12K8, which represents the depth and design of the joist and the type of chords used. This can be used by manufacturers, installers, and industry personnel.
A structural engineer or architect can help select the appropriate joist based on required span, building design, and local building code requirements.
A bar joist is an engineered steel member used in the construction of buildings. Bar joists provide increased strength and are able to span greater distances than typical wood beams.
They also have excellent sound resistance, fire resistance, and seismic performance as well as superior dimensional stability and uniform loading capabilities. Additionally, they can be produced in various depths, thicknesses and web profiles to accommodate unique architectural projects.
Different Types Of Bar Joists
Bar joists are an important component used in constructing steel frames for buildings. They come in different shapes, sizes and materials to accommodate the needs of any building’s frame construction. Bar joists, also known as steel bar joists, are available in different sizes and are suitable for various construction projects, from small to large.
K bar joists are ideal for projects with lighter loads and can be used for roofs.
KCS bar joists are suitable for projects with extra loads that require posts that can withstand constant shear and movement.
LH bar joists are designed for long-span requirements and heavy loads in unique or complex conditions. DLH bar joists are similar to LH bar joists but can be customized to your needs. It is important to note that the type of bar joist needed will depend on the weight and size of the roof and structure, and that bar joists and trusses serve different purposes in the overall design of a structure.
Benefits Of Using Bar Joists
Bar joists have several benefits over traditional beam or girder construction methods. They are pre-manufactured in factories and ready for installation upon arriving at job sites, which speeds up the building process and lowers labor costs.
Additionally, pre-manufactured bar joists are more precise and result in a more stable and durable structure, while also reducing overall waste. However, the cost of bar joists is higher than stick framing, which may offset labor and disposal savings.
Additionally, designing and engineering may take more time due to the need for pre-manufactured joists to meet specific criteria.
Bar Joists Cost
The cost of bar joists can vary depending on the size and scope of your project. They are typically made of steel and can range from $300 to $500 per square foot. However, for smaller projects like sheds, the cost may be lower at around $100 per square foot.
Additionally, shipping fees and customization charges should be taken into consideration, which can add $20 or more per square foot. Keep in mind that the weight of the materials can also affect pricing, especially for larger projects, and it’s best to research manufacturers to find the best pricing options for your needs.
Installation Requirements For Bar Joists
In order for a bar joist to be properly installed, there are certain requirements that need to be met. The bar joist must be properly designed and supported in accordance with local building codes, and it needs to be securely connected to supporting components like trusses, beams or columns.
In addition, the joints between the bars should be welded together with appropriate brackets and tested for strength.
Finally, diagonal bracing should also be included to provide additional support against lateral loads on the structure. With proper installation of bar joists, structures can last for many years.