Some Reasons to use Web Joist Trusses

Web Joist’s open-web trusses feature exclusive patented improvements

Web Joist manufactures an improved open web joist using knurled pins and heel bearing connection (U.S. patent No. SIB3570204). They feature a simple economical bearing connection designed specifically to handle an eccentric load and eliminate the need of increased building height or notched plate. The bearing offers a tolerance in building wall variation; simply nail in place through the pre-drilled holes.

Webs and chords are connected with a special Web-Loc™ pin which locks the connection, assuring a no movement fit which is effective at eliminating clicks and squeaks in floor systems.


Web Joist can be used successfully in many projects because it is a very economical floor and roof system when compared to other construction materials—especially when ceiling, decking, floor fill materials and labor costs are considered. Utilizing these lighter weight systems will generally result in reduced size of bearing walls, foundations and footings.


Longer spanability, with open webs for ductwork, and top or bottom chord bearing capability. Web Joist trusses may be supported on frame, steel, masonry, or concrete construction, Web Joist trusses weigh less than most other structural members—approximately 4 plf for Version 1 and 7 plf for Version 2. This feature facilitates quick and easy installation without the need for expensive mechanical equipment in most projects.

Mechanical access

The space between webs facilitates installation of ductwork, wiring, and plumbing to significantly reduce the system depth and cost.

Fire sprinklers

Web Joist trusses are unobstructed construction as defined by tine 1999 edition of NFPA 13 for Fire Sprinkled Construction which eliminates sprinkling in each truss space.

One hour fire rating

For one hour, fire resistive assemblies, see ICBO or L.A. City Report.

Nailable chords

The wood chords are 3 1/2″ wide. The decking or ceiling can be directly attached to the chords to minimize construction time and labor.

Engineered designs

Each Web Joist truss is custom designed by our engineering department using custom written software to verify the design meets all specified loading requirements. The Web Joist engineering department will provide designs for all trusses on a project.

Code acceptance

Web Joist trusses have been accepted by most building codes including, ICC-ES Evaluation Report ESR-2504 and L.A. City RR 25825.