How far can you span with 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.
What wood do you use for joists?
Wood Species The common types of wood used to make floor joists are redwood, hemlock, Douglas fir, and southern yellow pine.10-Aug-2021
Can you build your own I-joist?
1:224:40What is an I-Joist and How are They Made - Did You Know? - YouTubeYouTubeStart of suggested clipEnd of suggested clipThat's cut into panel 65 feet in length the panels. Are then cut into sections 2 inches wide and 65.MoreThat's cut into panel 65 feet in length the panels. Are then cut into sections 2 inches wide and 65.
What is the composition of a wood I-joist?
I-Joist Basics I-joists are comprised of top and bottom flanges, which resist bending, united with webs, which provide outstanding shear resistance. The flange material is typically laminated veneer lumber (LVL) or solid sawn lumber, and the web is made with plywood or OSB.
Are 2x6 OK for floor joists?
Yes, 2 X 6 lumber can be used for floor joists, but the allowable clear span is only about 4 or 5 feet. Such a small span is seldom useful.
How many joists is 12 feet?
A 12-foot long deck with joists 16 inches on center will require 10 joists.
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.
Are floor trusses stronger than joists?
Span longer distances than traditional joists, removing the need for walls in some areas. Lighter weight. Stronger than traditional joists. Wider nailing surface (making the building process easier)19-Jun-2015
Can you make your own wood I-Beam?
With quality lumber and hard work, you can create a long-lasting I-beam. An I-beam is called such because of the shape of its cross section. You can easily build an I-beam by using timber. I-beams are not only more cost effective than normal beams, but they are also strong enough to serve the same purpose.
Can you drill through I-joist?
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).
What is the bottom of an I-joist called?
An I-joist has two main parts, the web and flange. The web is sandwiched between a top and bottom flange, creating the “I” shape. The flange can be made from laminated veneer lumber or solid wood finger-jointed together for ultimate strength. It is grooved on one side to receive the web.
What are two advantages of a wood I-joist over a solid lumber like 2x12?
And similar to the floor truss, I-joists can span greater distances than 2×12's. Most I-joists also come with knockouts to run plumbing and wires through to save time on drilling. The prices are also more stable than dimensional lumber.
What size are I-joists?
I beam floor joists feature a top and bottom “flange”, which is either a 2×3, 2×4, or an LVL. Between the flanges is engineered wood – typically OSB (orientated strand board) – called a “web”. I-beams are often wider than standard framing lumber and can span longer distances.
How far can you span a 12 inch I-joist?
You can go up to 17 feet, 9 inches if you use 9-12 inch-deep joists that are 12 inches on-center.
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). Just stay 6 in.30-Jun-2017
How far can an I-joist span without support?
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.
Can you make your own I-joist?
1:224:40What is an I-Joist and How are They Made - Did You Know? - YouTubeYouTubeStart of suggested clipEnd of suggested clipThat's cut into panel 65 feet in length the panels. Are then cut into sections 2 inches wide and 65.MoreThat's cut into panel 65 feet in length the panels. Are then cut into sections 2 inches wide and 65.
How far can you span a 2x6 without support?
2-grade 2×6 joists can span up to 10 feet 9 inches from beam to beam when spaced the standard 16 inches apart with a maximum live load of 30 inches per square foot.
What size beam do I need to span 18 feet?
Wood beam size for a 18 foot span:– as per general thumb rule, for a 18 foot span, size of wood beam or lumber joist should be 2×12 which placed at 16″ apart from centre used for residential building or projects or construction in which depth of section of beam is 300mm (12″) and width of beam is 50 mm or 2″.
Can I use 2x8 for floor joists?
The span for a 2×8 floor joist can range from 7' 1” to 16' 6”. In addition, floor and deck joists have to support a fairly high live load because they provide support underneath living areas. You may find that a 2×8 does not offer the necessary support on its own.
How big of a hole can I put in I-joist?
Holes not exceeding 1/3 of the depth of the web in any dimension are acceptable in most I-joists, and they may be round, square, or rectangular. Holes must be placed in the center third of the vertical depth of the web.14-Dec-2009
Can I run a waste pipe through joists?
Can a waste pipe go through a joist? Running waste pipes through joists should be avoided where possible, as any drilling of joists (also known as notching joists) may weaken them and compromise the structural integrity.05-Jul-2021
Can you cut holes in I beams?
NEVER drill a hole within 1' of the end of any beam or a floor joist. You should also avoid drilling within 1' of where a beam sits on top of a support column or post.
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.
Can Engineered Lumber be used in concrete?
Engineered lumber must not be installed in direct contact with concrete or masonry construction per code and shall be used in covered, dry-use conditions only (moisture content less than 16%).
Do all I beam joists have OSB?
All Wood I Beam joists have an enhanced OSB web. Referenced dimensions are nominal and used for design purposes. Not all products are available at all distribution centers; contact Georgia-Pacific for product availability.
US East
To download our VERSA-LAM ® span and size chart PDFs, click on the links below.
US West
To download our VERSA-LAM ® span and size chart PDFs, click on the links below.
BC Calc
BC Calc ® performs engineering analysis to help our customers size beams, joists, columns, studs and tall walls for their building projects. It is simple to use, yet flexible enough to analyze a variety of common applications. The user enters the member geometry, adds loads, holes and other relevant data and then selects a product for analysis.