Floor systemA variety of floor framing and wood structural panel products can be used in floor construction.

To select the appropriate products and floor design, it is essential to define the predicted loads and to consider both the structural requirements and compatibility with the finish floor requirements.

For information specific to floor joists, floor sheathing and floor beams, click on the tabs.

Floor Systems Publications

Detailed information on floor systems, including beams, I-joists, and sheathing.

APA Performance Rated I-Joists offer designers and builders an engineered wood option for use in high-quality floor systems. They provide consistent performance for the most demanding residential applications, are simple to install, allow greater design flexibility because they can span long distances, are dimensionally stable, and are lightweight and easy to handle.

Click on the following links to download APA I-Joist publications.

Solid Sawn Floor Joists

American Wood Council

Southern Pine

Floor Truss Design Information  

Southern Pine

Structural Building Components Association  

One of the keys to good performance in floors is the right combination of subfloor, underlayment and finish flooring. Underlayment panels provide a smooth base for carpet, tile or sheet flooring and other types of finish flooring. APA Underlayment also possesses high concentrated- and impact-load resistance.

Glulam Beams

In residential construction, glulam beams are often chosen for their beauty in exposed designs featuring vaulted ceilings or long clear-span ridge beams. They are also ideal for hidden structural applications, such as floor beams.

Glulam beams have superior strength and stiffness and are available in a range of grades and sizes. Framing-grade glulam beams can be used in a wide range of concealed floor framing applications. When the beams are exposed, such as second story floor framing where the glulam is exposed to the floor below, an architectural-grade beam combines the strength of glulam with the warmth and beauty of wood.

Click on the following links for additional information.

LVL Floor Beams

Design information is available from proprietary manufacturers of LVL products.

Solid Sawn Lumber Beams

American Wood Council

Southern Pine