Tips and Tricks

What is a DLH joist?

What is a DLH joist?

As with LH-Series joists, DLH-Series (Deep Longspan) joists are for longer span conditions and support larger loads. With standardized depths from 52” through 120” and spans up through 240 feet, DLH joists also allow for special profiles to accommodate a variety of conditions.

What is KSP joist?

K Series bar joists are designed for use typically with lighter loads and are most common in roof design. K Joists are used typically where shorter span conditions are required.

What is joist shoe depth?

Joist Seats for Nominally Flat Roofs: For a nominally flat roof (roof with a pitch less than or equal to ¼” per foot), the minimum seat depth required by the Steel Joist Institute (SJI), is 2 ½” for K-series joists and 5” for LH-series joists.

Is girder a joist?

A joist and a girder are both types of beams. A girder is the main load-bearing beam in a structure and is supported by posts. Joist is a structural member supported by beams. Therefore, the main beam in your house isn’t just a “main beam” – it’s a girder beam.

What is an SP joist?

The allowable loads for steel joist are based on the standard load and span tables for K, LH, DHL, and SLH Steel Joists. However, if a concentrated point load (even one with a small magnitude) is detected on a standard joist, the joist will be flagged as a Special (SP) Joist.

How heavy is a steel joist?

Entering the weight tables for a Joist Girder span of 50 feet, a number of joist spaces equal to 8, a Joist Girder depth of 40 inch, and a panel point loading of 12 kips (ASD), the approximate self-weight of the Joist Girder is 59 pounds per linear foot.

What is the difference between a joist and a truss?

The joist supports the load which the floor is built to bear. A truss is used to support the roof.

What is a joist vs beam?

Joists are typically smaller beams that run across an open space, typically arranged in parallel series to support a floor or a ceiling. While both terms are often used interchangeably, beams are the main load-bearing structural element of a roof and joists usually span between two beams.

What is the standard joist pitch for roof joists?

The joist designation is determined by its nominal depth at the center of the span and by the chord size designation. To meet the demand for pitched top chord members (when necessary for roof drainage) a standard pitch of 1⁄8Ó per foot (1:96) has been established.

How deep are double pitched joists in a gym?

In an architectural slam dunk, 185-foot-long, 12-foot-deep double-pitched joists create an arena-like feel in Rogers High School gymnasium. Get in-depth information about steel joists and joist girders, including load zone joist design and BIM design.

What is a square end Longspan joist?

Longspan and Deep Longspan Steel Joists can be fur- nished with either underslung or square ends, with par- allel chords or with single or double pitched top chords to provide sufficient slope for roof drainage. Square end joists are primarily intended for bottom chord bearing.

What is the difference between out of the box joists?

Analytical line/joist origin located at base of seats for easy insertion of joists at correct elevation One family replaces multiple out of the box families – e.g. for double pitch you only need one of our joists whereas the out of the box joists require different families for different numbers of internal panels.