No. You only need a bearing of 1-1/2" in all normal loading situations; therefore, trusses can be butted together over a 2x4 intermediate bearing wall.

The assembly process for OPEN JOIST floor trusses results in some unavoidable glue runs and spills. The glue can be scraped from OPEN JOIST trusses or painted over if the trusses are to be left exposed.

open-web floor truss assembled through a unique process of finger joinery and waterproof structural adhesive instead of metal plates.

In most cases involving approved construction methods of today, extra floor support is not needed, but it is always advisable to check with your contractor.

OPEN JOIST is an engineered floor truss that takes advantage of the structural power of the triangle and the forces of compression and tension working together to create superior strength.

OPEN JOIST uses phenol resorcinol adhesive. This structural adhesive is the standard of the engineered wood products industry (also used by I-Joist and Glu-Lam manufacturers) and has been in use since the late 1940's. It is safe to say that the wood fiber in an OPEN JOIST floor truss would disintegrate from age before this glue would break down.

The light gauge steel truss manufacturer should typically provide the truss to bearing attachment detail to all bearings used within the project including masonry, blocks, structural steel, poured concrete, steel studs, etc. including the screws, pins, tap cons, or other fasteners that are required.

Clear spans depend on truss spacing and floor loading requirements, but the maximum clear spans achievable (distance between bearings) with OPEN JOIST are:

Maine Deck? can be used for decking chassis work where there is compressive load bearing such as where the joists would be resting on an underlying concrete screed or beam. It can be used, following a full assessment of the application and full consideration to span of joists, to create suspended joists but this is best left to a professional installer. It is not recommended to use Maine Deck for major structural work unless there has been an assessment by a structural engineer.

Nascor has published a series of detailed floor span tables that take into account joist type, on centre spacing, glue vs. no glue and other factors. Download the Nascor Specifier Guide, where you will find the span tables on page 3.

Yes; we can supply products that have been treated with Arch Vacsol Aqua, which is a water based environmentally and human friendly preservative.

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Yes. OPEN JOIST has been approved for use by BOCA, ICBO and SBCCI code agencies. National Evaluation Service, Inc. has issued National Evaluation Report Number NER-502 for the product.

No. The superior strength and highly competitive cost make it a natural choice for many commercial construction projects. The product's strength/cost ratio makes it an attractive floor-framing system for almost any building project. an open-web floor truss, OPEN JOIST normally issues floor-system designs using the standard floor truss deflection criteria of L/360, because open-web floor joists allow the use of "strongback" bracing (see installation details).

engineered floor system layout is supplied with every shipment, along with general framing details and information for framers. Generally, a builder only has to keep in mind a few things when framing with OPEN JOIST. Leave at least 1-3/4" of the end block when trimming the end, and do not cut or notch the web area of the OPEN JOIST floor truss. For the most part, framing with OPEN JOIST is no different than framing with dimension lumber.

Support and product upgrades are free for 30 days from purchase. To get free product updates and support for 1 year, consider purchasing an Annual Support & Upgrades Contract. View your "my licenses" page to manage these.

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A No truss members can be cut, or any of the trusses altered without consulting ourselves for advice. We can supply solutions to most enquiries of this nature in the form of additional material and method statements. However, we have to make a charge for this service, and we are sure you would wish the Structural Guarantee to be maintained.

Please send us the Architects or Builders’ drawings, or a sketch of your requirements. We ideally like plans, elevations and sections.