Helpful tips

How wide are posi joists?

How wide are posi joists?

The typical chord width of a Posi-Joist is 72mm or 97mm wide making a Posi-Joist inherently stable. As a result a strongback brace is only required when the clear span of the Posi-Joist exceeds 4m.

What size are timber joists?

Spacing (distance apart) of joists – centres

Size of joist mm 400mm 450mm
38 x 235 4.43 4.18
47 x 97 1.92 1.82
47 x 122 2.55 2.45
47 x 147 3.06 2.95

Can posi joists be cut?

The depth, length and width can be adjusted to produce an enormous number of different specifications, each with clearly defined performance criteria. In addition, end details of the Posi-Joist can be altered to give a variety of support conditions. Posi- Joist Trimmable End provides field cutting flexibilty!

What size joists should I use?

In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet.

Are posi joists expensive?

Posi joists have an initially higher cost than I-joists because they are manufactured to order using specialist equipment to meet customers’ requirements. However, a metal web joist’s ability to span greater distances than I-joists, coupled with its open web provides many cost saving advantages.

Is an I joist stronger than timber?

Are I joists stronger than timber? They can span greater distances, and are considered to be 50% stiffer than dimensional timber under traditional frame spacing. Unlike timber, the strength of an I joist is not affected by cut holes that are used to run plumbing.

Are I joists stronger than timber?

Do posi joists need noggins?

When all the Posi-Joists have been positioned and fixed in place, the partition noggins, perimeter noggins, rim boards, when required can be installed, and in the case of masonry construction the steel lateral restraint straps should be fixed in place at no greater than 2m centres and should extend over 3 joists.

What are posi joists used for?

Posi-Joists are floor joists that are used when a lightweight but strong solution is required. They allow for a greater span distance than solid joists and allow for more design freedom. Not only can Posi-Joists be used in floors, but they are also suitable for flat, low and steep pitched roofs.

Where can I buy a Posi joist table?

Please Click Here With the largest network of licensed fabricators across the UK and Ireland, you are never too far from a Posi-Joist manufacturer. All manufacturers use the very latest BIM compliant MiTek 3D Design and Engineering software and are able to provide clear and detailed drawings.

How big should the floor joist be on a table?

Looking at this table you will see there is a choice in the size of floor joist (2 X 6, 2 X 8, 2 X 10 or 2 X 12) and there is a choice in the joist spacing (12″, 16″ or 14″). The floor joist spacing is the distance between the centers of any two installed joists. See the image below for an example of joists spaced 16″ on center (16″ o.c.).

What are the different types of floor joists?

The table below shows the maximum span for a floor joist with the following designations: 1 Douglas Fir-Larch (lumber species) 2 No. 1 and No. 2 (lumber grade) 3 All joists are bridged More

Where can I buy an I-joist joist?

Find I-joist joists at Lowe’s today. Shop joists and a variety of building supplies products online at