Depending on various design factors and which TJI joist is used, the span can vary from 13’-7” for a TJI110 at 24” centers to 36’-1” for a TJI560 at 12” centers. When determining span, refer to the manufacturer’s specifications, the local building code, or the calculations of a Structural Engineer. TJI vs I-Joist
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How deep can you cut into a TJI joist?
This guide features TJi®joists in the following sizes: Flange Widths: 1¾", 21⁄16", 25⁄16", and 3½" depths: 9½", 117⁄8", 14", and 16" For deeper depth TJi® joists, see the Weyerhaeuser deep epth TJi®Joist guide, #TJ-4005, or contact your Weyerhaeuser representative.
How far can you span a 2x6 floor joist?
The maximum span for a No. 1 quality 2×6 floor joist made from southern pine with a maximum load of 40 psf at standard 16-inch spacing is 10 feet 9 inches, according to the International Residential Code. When we break this down, the variables determining floor joist span are joist spacing, load, wood species, and lumber quality.
What is the maximum span for a 2x10 floor joist?
With 16” spacing, a floor joist can span up to 14’ as long as it is not cantilevered and terminates with support on either end. If the joists are 24” apart, then one 2×10 joist can span up to 11’ 5”. These lengths are for SYP lumber. If you have Spruce-pine-fir lumber, then your span changes to 13’ 7” for 16” joist spacing.
How to strengthen joists?
- Step one: To sister joists, first you select a sistering material of the same measurements as your previous joists which will be strengthened. ...
- Step two: Wear your protective kits. ...
- Step six: Further ensure the joining of the new floor joists to old floor joists by nailing through them. ...
How far can TJI joist span?
[7] Maximum on-center spacing for bracing of TJI® 110 is 32″ o.c.; for bracing of all other TJI® joists use 36″ o.c. [8] Maximum clear span limited by scope of 2018 IRC Table 802.5.
How far can 11 7 8 I-joist span?
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.
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.
HOW FAR CAN 9.5 TJI span?
TJI–TRUSS JOIST P/STJICHORD DEPTH16" O.C. MAX SPANTJI-2109-1/2"15' 9"TJI-2309-1/2"16' 2"TJI-11011-7/817' 10"TJI-21011-7/8"18' 8"6 more rows
How far can I-joist span without support?
Span is determined by species, grade, dimensions, spacing, use, and load. A rule of thumb is 1.5 times a joist's depth but in feet when spaced at 16” centers. In general, a 2×8 will span 1.5 x 8, so 12-feet. Based on all factors though, a 2×8 joist span is 7'-1” to 16'-6”, and a rafter 6'-7” and 23'-9”.
What size beam do I need to span 24 feet?
What size beam to span 24 ft:- as per general thumb rule and guidelines, a 4 nailed 2×18 or 4-2×18 or 8×18 size of wood beam can allow to span 24 feet. Thus, for a 24 foot span, you will need atleast 4-2×18 or 8×18 size of wood beam.
Can a 2x12 span 16 feet?
A 2×12 (2-by-12) floor joists can span up to 23 feet 3 inches, 2×10 (2-by-10) up to 19 feet 1 inches, 2×8 (2-by-8) up to 15 feet & 2×6 (2-by-6) up to 11 feet 4 inches at 16″ spaced by using southern yellow pine graded as #1 when live load of 30 lbs/ft^2 & dead load of 10 lbs/ ft^2.
Can a 2x12 span 20 feet?
In general terms, joist or beam which spaced 16 inches apart on Centre can span 1.5 times in feet their depth in inches. A 2×14 can span upto 20 feet. What size beam to span 20 ft:- as per general thumb rule and guidelines, a 4 nailed 2×16 or 4-2×16 or 8×16 size of wood beam can allow to span 20 ft.
How big of a beam do I need to span 16 feet?
For a 16 foot span, you will need atleast 3-2×14 or 6×14 size of wood beam. Thus, a 3 nailed 2×14 or 3-2×14 or 6×14 wood beam can allow to span 16 feet. For a 16-foot spans, the wood beam has to be at least 14 inches in depth and 6″ in width (3-2×14) used for residential building, wood frame structure or projects.
Can floor joists span 24 feet?
What size floor joist to span 24 feet:- as per general rules and guideline, a 2×12 (2-by-12) size of floor joists made of southern yellow pine, graded as #1 can allows joist spans up to 24 feet for a live load of 30 pounds per square foot and dead load of 10 pounds per square foot when spaced 16 inches apart.
What does TJI stand for?
TJIAcronymDefinitionTJITransitional Justice Institute (University of Ulster; Ireland)TJIThe Journey Inside (Intel education software)TJITribal Judicial Institute (University of North Dakota; Grand Forks, ND)TJITrus Joist I-Joist (engineered floor and roof joist; trademark of Trus Joist, a Weyerhaeuser Business)3 more rows
How far can a 2x10 span without support?
How Far Can a 2×10 Beam or Header Span? A 2×10 beam – made up of two 2x10s nailed together – can span up to 11' without support beneath a deck that is 4' wide. For a more normal-sized deck, the same beam can span 8', supporting a deck that is 8' wide. You can also triple a 2×10 beam.
Can floor joists span 30 feet?
Joists are available in several depths and lengths and superior strength allows them to span up to 30 feet (TRIFORCE span tables).
Can a floor truss span 30 feet?
A floor truss can be designed to span 30 or more feet with ease. The truss manufacturer can build them so strong that there's no bounce to the floor at all. This comes in handy if you desire a tile floor. Tile and grout can crack if installed over wood floors that are springy and bouncy.
What is a continuous span joists?
A multiple, or continuous, span condition is defined as a TJI® joist having two or more spans along its length. Using TJI® joists in continuity has several advantages over simple span applications. Using joists continuously over several supports generally enhances floor performance by reducing deflection.
What is a continuous span?
A span which is formed of a series of consecutive spans (over three or more supports) that are continuously or rigidly connected so that bending moment may be transmitted from one span to the adjacent ones.
What is a TJI span table?
Span tables in the specifiers guide TJ- 4000 are restricted to the worst case of simple or continuous spans. A multiple, or continuous, span condition is defined as a TJI® joist having two or more spans along its length. Using TJI® joists in continuity has several advantages over simple span applications. Using joists continuously over several supports generally enhances floor performance by reducing deflection. Continuous framing will also reduce the number of pieces and speed up installation. Because of the reduced deflection, the joists can span farther in some cases. Forte software can be used to check conditions that are not covered in the span tables.
Why use joists continuously?
Using joists continuously over several supports generally enhances floor performance by reducing deflection. Continuous framing will also reduce the number of pieces and speed up installation. Because of the reduced deflection, the joists can span farther in some cases.
What is a TJI joist?
Engineered to provide strength and consistency, TJI® joists are a key part of our Silent Floor® System. Silent Floor® joists continue to set the standard for residential floor and roof joists. Their strength and long lengths give you the freedom to design the open, spacious floor plans that your customers want. Engineered for dimensional stability and predictable performance, Silent Floor® joists resist warping, twisting, and shrinking.
What joists are available for TJI 110?
For TJI®110, 210, 230, and 360 Joists
How many nails do I need for TJI 110?
Safety bracing (1x4 minimum) placed at 8' on-centre (6' on-centre for TJI®110 joists) and extended to a braced end wall. Fasten at each joist with two 8d (0.113" x 2½") nails minimum.
How many rows of fasteners are allowed on a diaphragm?
360 and 5603" 4"(2)6" (1) One row of fasteners permitted (two at abutting panel edges) for diaphragms. Stagger nails when using 4" on-centre spacing and maintain 3⁄8" joist and panel edge distance. For other applications, multiple rows of fasteners are permitted if the rows are offset at least ½" and staggered. (2) Can be reduced to 3" on-centre for light gauge steel straps with 10d (0.148" x 1½") nails.
What is a TJ Pro rating?
iLevel® Trus Joist® TJ-Pro™ Ratings are generated by a sophisticated computer model designed to predict floor performance and evaluate the relationship between the cost and the “feel” of any given floor system. The methodology is based on extensive laboratory research, more than one million installations, and the combined expertise of some of the best engineers in the field. TJ-Pro™ Ratings go beyond deflection criteria to consider job-specific needs and expectations. In many cases, using TJ-Pro™ Ratings will offer a system that improves performance while actually reducing costs!
How many screws are needed for 2x strapping?
1⁄16" Two 2½" screws for 2x_ strapping connections Two 8d (0.113" x 2½") nails or 2½" screws, typical
How much weight can you use for a backer block?
With top mount hangers, backer block required only for downward loads exceeding 395 lbs or for uplift conditions Use 2x4 minimum squash blocks to transfer load around TJI®joist
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.