I-joists are strong, lightweight, "I" shaped engineered wood structural members that meet demanding performance standards. I-joists are comprised of top and bottom flanges, which resist bending, united with webs, which provide outstanding shear resistance.
Full Answer
What is an I joist used for?
step 2 How Far They Can Span
- Joist engineering: Each manufacturer has engineering for each of their joist products. ...
- The depth of the joist:
- The length of the joist span: The joist span is the distance between the two supports.
- Joist spacing: This is just a fancy way to say how close the joists are installed to each other. ...
Can I use joist from a computer?
Now any time you want to collect a payment using Joist Payments, just make sure the option to Accept Credit Cards and PayPal is enabled on the estimate or invoice you'll be sending to your client. Then just send the estimate or invoice to your client. Whether they open it on their mobile device or computer, they will have the option to pay you ...
How to build wood I joist?
Things You Will Need
- Measuring tape
- 2-by-6 or 2-by-8 lumber
- Urethane-based construction adhesive
- Caulk gun
- 4-inch plastic putty knife
- An assistant
- 16d common nails
- Hammer
- Power saw
What is an I joist floor system?
- Reduces floor “bounce”
- Easy to install
- A cheap solution for solving floor movement
How strong is an I-joist?
Are I joists stronger than timber? I joists are specifically designed to offer strength in areas that dimensional lumber is incapable of. They can span greater distances, and are considered to be 50% stiffer than dimensional timber under traditional frame spacing.
How far can you span an I-joist?
Span refers to the length of the I-joist. The L/480 table with a 40 per square foot live load and a 20 per square foot dead load with a depth of 11 7/8 inches will give you spans according to joint weight. With these factors, the lightest joist will have a maximum span of 17 feet, 8 inches.
Are I-joists cheaper?
I-beams are increasingly taking over in new residential construction. In new construction, it is cheaper to use engineered joists in some cases. For instance, it is possible to use half the number of I-beams compared to 2x10s since I-beams can span further with center support.
What are I-joists used for?
I-joists are used extensively in residential floor and roof framing. They are ideal for long spans, including continuous spans over intermediate supports. Because I-joists are straight and true, it's easier for builders to avoid crowning and maintain a level framing surface.
How much weight can an I joist hold?
That means the joists can support a minimum of 40 pounds per square foot live load. Though, by consulting the 50 pounds per square foot live load/10 pounds per square foot dead load table, you can see the joists' span would need to be reduced to 11 feet 11 inches to support heavier weight safely.
How much does a 40 foot I-beam cost?
Installing steel I-beams costs $100 to $400 per square foot for labor and materials. Materials alone will be less expensive, so if you have the time and skills for a major DIY project, that can help to cut costs. A 10-foot steel I-beam alone will cost $60 to $180, while a 40-foot beam will cost $240 to $720.
What can I use instead of an I-joist?
Options for Floor Framing. You can go the traditional floor framing method with dimensional lumber, otherwise known as 2×10's or 2×12's. Or, you can use a manufactured floor truss, which is typically made up of 2×3 or 2×4 members and are designed and built by your local truss plant.
What are the strongest floor joists?
Since knots and other defects weaken wood, higher grades of lumber (designated as clear, select, or #1) are considered stronger than lower grades. Higher grades of lumber, however, are also much more expensive. Lumber graded as #2 is the most common choice for floor joists and other framing lumber.
What is better I-joist or floor truss?
Floor trusses can span farther between bearing points than I-joists, allowing for larger open rooms. This also reduces the need and cost for extra bearing posts, beams, and footings. Floor trusses have built-in openings, which can be used to install HVAC ductwork, plumbing lines, and electrical wiring.
Are I-joists better than lumber?
Aside from providing longer spans, I-joist and TRIFORCE® floor systems are superior in strength and precision to solid sawn lumber. They are stiffer, lighter and more easily maneuverable. They also provide a bigger nailing surface to attach the floor membrane than the commonly used 2 x 10.
Can you drill holes in I-joists?
You can drill the holes anywhere along the length of the joist (first photo). If you have manufactured I-joists, you can drill holes up to 1-1/2 in. diameter almost anywhere in the web area (the area between the flanges).
Can I use I-joist for roof?
Some builders use manufactured I-joists not only to support floors, ceilings, and flat roofs, but also in place of either sawn-lumber rafters or wood trusses to support pitched roofs.
Common I-Joist Applications
I-joists are used extensively in residential floor and roof framing. They are ideal for long spans, including continuous spans over intermediate su...
Fire Protective Assemblies For Wood I-Joist Floors
Learn about several options that enhance the fire performance of I-joist floor systems and comply with the 2012 and 2015 International Residential...
White Paper: Basis of IRC Membrane Protection Provisions
APA, AWC, and WIJMA jointly developed this paper that describes the history, background, and intent of the IRC provisions for fire protection of fl...
White Paper: Code Requirements For Prefabricated Wood I-Joists
APA, AWC, and WIJMA jointly developed this paper that describes the basic code recognition for prefabricated wood I-joists and the need for product...
White Paper: Fire Protection of I-Joist Floors With Factory-Applied Solutions
APA developed this paper that describes the basic fire protection requirements for prefabricated wood I-joists with factory-applied fire protection...
Product Specifications
Learn why LP SolidStart I-Joists are the right choice for your upcoming job.
How It's Made
Gorilla Glue Technology® helps build one of the strongest, stiffest sub-floors in the industry.
When should I-joists be opened?
I-joists bundles should be opened when they are ready to be installed. I-Joists are not stable or capable of withstanding loading until they have been properly installed and fully braced. I-joists should be braced and nailed as they are being installed.
How big of a hole can I cut in a joist?
Some holes as large as 1 ½” in diameter can be cut in the I-joist web without consulting. However, I-Joist manufacturers should provide distances required between holes, between flanges, between final hole and bearing point, and between any other significant portions of the joist.
Can I-joists be cut?
Openings can be strategically cut in the I-Joist web to allow for wiring, ductwork, and plumbing. One I-joist can do the work of two or more solid joists. Between 15% and 20% of I-joists are now being built with solid-lumber flanges. Slightly reduce the space between joists, making the subfloor a bit stiffer.
What is TJI joist?
All TJI Joists are designed using patented software that designs a floor taylor-made for every home. This software creates a layout and specifies where every single framing member goes. When the material arrives on the jobsite, there is minimal cutting, and carpenters know exactly where every joist goes.
Can TJI joists be cut?
Large holes can be cut in the webbing of TJI Joists, allowing for mechanicals to be easily run and installed. Joists can also be spaced wider than traditional solid sawn joists which allows for quicker and easier installation