Structural Joist
| Width (in): 2-1/2" | Choose an option 2-1/2" 3-5/8" 4" 5-1/2" ... |
| Mils: 33 Mils | Choose an option 33 Mils 43 Mils 54 Mils ... |
| Coating: G60 | Choose an option G60 G90 G60 G90 |
| Leg Height (in): 2" | Choose an option 2" 2-1/2" 2" 2-1/2" Cle ... |
Full Answer
How to size ceiling joists per the IRC?
- a. The uplift connection forces are based on a maximum 33-foot mean roof height and Wind Exposure Category B or C. ...
- b. The uplift connection forces include an allowance for roof and ceiling assembly dead load of 15 psf.
- c. The tabulated uplift connection forces are limited to a maximum roof overhang of 24 inches.
- d. ...
- e. ...
- f. ...
- g. ...
- h. ...
How to select TJI floor joist sizes?
Other engineered wood products we currently offer include:
- Roof Trusses
- Floor Trusses
- Engineered Wood Parallam Beams
How to calculate floor joist?
Joist Span Calculator
- Select a load. There are six choices. The lowest is a plain ceiling joist with no storage (10 pounds per square foot). ...
- Select the on center spacing for the joists. This is how far apart they will be. ...
- Enter a span for the joist. This will be slightly less than the length of the board. ...
- Finally, select a type of lumber. No. ...
How many floor joists calculator?
Joist Span Calculator. Select a load. There are six choices. The lowest is a plain ceiling joist with no storage (10 pounds per square foot). The highest is a fully loaded floor (70 pounds per square foot). Select the on center spacing for the joists. This is how far apart they will be. Most lay outs are on 16″ so the field is pre-selected.
Are Floor Joists Hangers Necessary?
Floor joists need to be securely fastened to the wood beams in order to prevent them from swaying or twisting. Whether or not joist hangers are nec...
How to Replace a Rotted Floor Joist in a Crawl Space?
If you have a rotted floor joist in your crawl space, it's important to replace it as soon as possible. If damage to the floor joist is limited, in...
How to Sister a Floor Joist?
A sister joist is used to repair a bad floor joist. However, it can also bridge the span distance between two beams. When repairing a bad floor joi...
Do You Need a Permit to Sister Floor Joists?
In most cases, you don't need a permit to sister floor joists. However, it's always best to check with your local building department to be sure. T...
Which Way do Floor Joists Run?
Floor joists usually run perpendicularly between two load-bearing beams. In some cases, it may be necessary or desirable to run the joists at an an...
How Much Weight Can Floor Joists Support?
As discussed earlier in this post, a floor joist can generally hold between 30 and 40 pounds per square foot (PSF). Floor joists are designed to su...
Can You Notch a Floor Joist?
Floor joists can be notched to fit around obstructions, such as plumbing pipes or ductwork. However, there are IRC guidelines directing how where a...
Are Floor Joists Treated?
In most cases, floor joists are made from untreated lumber. However, there are a few exceptions. If your home is in a moist or humid environment, y...
Addition With 12 Ft. Floors and 16 in. On-Center (OC) Joists
Scenario:You are building an addition. One of the rooms is 12 feet. You need to span a distance of 11.5 feet for a live load.Purchase This: 1. Dime...
Addition With 12 Ft. Floors and Joists That Are Spaced Wider
Scenario:You need to span a distance of the same distance, 11.5 feet, for a live load, but circumstances dictate that you can only space the joists...
Addition With 16 Ft. Floors
Scenario:You are building a one-room addition to your house which is 16 feet long. This means that you need to span a distance a distance of 15.5 f...
Short Workshop Floor, 8 Ft. Long
Scenario:You are building a workshop. Your floor joists need to span a distance a distance of 8 feet for a live load.Purchase This: 1. Dimension (I...
What is steel joist?
Steel joists and joist girders are key components of today’s roofing and flooring systems. Whether you are designing a single or multistory structure, steel joists and joist girders are an efficient, cost-effective solution that can add a great deal of value to your structure.
What is composite joist?
The Composite Joist, or CJ-Series, system is an open web system where the concrete slab acts as the composite top chord of the underlying steel joists. Shear transfer from the concrete slab to the underlying steel joists is accomplished by welding steel shear studs through the steel deck to the steel joist top chord. Each joist is designed with a sufficient number of steel shear studs to develop the yield strength of the bottom chord. The CJ-Series exhibits a stiffer response to applied loads as compared to conventional steel joist systems.
What is Vulcraft joist?
In accordance with the standards set by the Steel Joist Institute (SJI), Vulcraft manufactures a full range of joists, including standard joists, jo ist girders, and composite joists, designed to work compositely with the concrete slab that is placed on top of the steel deck, creating a very efficient floor system.
What is a joist girder?
Joist girders are primary framing members. The design is simple span, supporting equally spaced concentrated loads from open web steel joists. Joist girders are designed to allow for the efficient use of steel in longer spans for primary framing members.
What is LH series joist?
LH-Series Joists are for longer span conditions and are capable of supporting larger loads. These joists allow for special profiles to accommodate a variety of conditions. Some of the typical special profiles include gable joists and arched joists.
What is the minimum floor joist size?
This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on-center (o.c.) for 2-grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load, which is typical of normal residential construction:
What is joist span table?
Joist Span Tables. Joist span refers to the measurement covered by the joist between supporting structures, such as beams or foundation walls. Builders generally use pre-calculated tables to tell them appropriate joist spans for each lumber species, size, and spacing.
How much more can a 2x12 span than a 2x6?
For example, a joist made from doubled 2 x 6s can span a distance about 25 percent more than a single 2 x 6, but a 2 x 12 can span about 80 percent more than a 2 x 6, even though it has the same amount of wood as a doubled 2 x 6.
What grade of lumber is best for framing?
Higher grades of lumber (clear, select, or 1) have fewer flaws, and will, therefore, be stronger. A common choice for construction framing is 2-grade lumber.
Can you choose a larger joist for a longer span?
For example, where head-room is an issue, they can choose smaller joists and space them closer together with a shorter span. Or, where a long span is needed, such as when framing a ceiling above an open-concept room, larger joists made with a stronger lumber species can be chosen.
How deep is a steel joist?
single-piece up to 15 feet deep and up to 125 feet long, depending on location and shipping restrictions. All are produced in accordance with the specifications of the Steel Joist Institute.
What is tension controlled steel joist?
tension controlled steel joist design results in a joist that characteristically displays both higher strength levels and large inelastic deformations prior to collapse. The result is a roof or floor framing system with improved strength, an improved reliability index, and improved sensory alert to overload prior to collapse. Flex-Joist
What is NMBS joist?
NMBS joist products are fabricated to meet the erection requirements of the Occupational Safety and Health Administration (OSHA). Field compliance with OSHA is necessary. This section summarizes the OSHA Safety Standards for Steel Erection, 29 CFR, Open Web Steel Joists 1926.757 requirements governing joist fabrication. Refer to pages 239 through 248 of this publication for the complete OSHA regulation for erecting steel joists.
Why are joists bolted at columns?
Joists at columns that are not framed in at least two directions with structural steel, are required to be bolted at the column to provide lateral stability to the column during erection. Joist bottom chords are to be extended at columns onto vertical stabilizer plates to prevent overturning during erection. Hoisting cables are to remain until both ends of joists are field-bolted and bottom chords are restrained by column stabilizer plates.
Is New Millennium Building Systems accurate?
Although the data shown is believed to be accurate, New Millennium Building Systems does not assume any liability or obligation of any kind or nature arising from or related to the data provided herein and/or its use. Applicability of the products and the accuracy of the data should be assessed by a licensed professional engineer or architect to determine the suitability for the intended application.
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.