Engineered wood products are designed to deliver predictable performance, efficient material use, and design flexibility across a wide range of structural applications. Manufactured to rigorous performance standards, products such as plywood and OSB, I-joists, glulam, CLT, SCL, and rim board provide reliable solutions for floors, walls, roofs, mass timber structures, and other demanding building systems.
As the leading technical authority for engineered wood, APA provides the research, testing, certification, inspection, and design resources professionals rely on to confidently specify and use these products.
Explore the categories below to learn how each engineered wood product is manufactured, where it is used, and how to design and build with it effectively.
Plywood and OSB are among the most widely used engineered wood products in construction, providing dependable performance for floors, walls, roofs, and countless specialty applications. Explore APA's complete range of wood structural panel resources, including plywood, OSB, radiant barrier sheathing, concrete plyforms, MDO and HDO panels, and siding products.
Explore product characteristics, performance ratings, span information, installation recommendations, and application-specific guidance for APA-trademarked panel products, all backed by rigorous performance standards and ongoing quality assurance.
Strong, versatile, and available in a wide range of grades and applications, plywood is used throughout residential, commercial, and industrial construction. Explore panel types, performance characteristics, design guidance, and specification resources.
OSB delivers reliable structural performance for floors, walls, roofs, and other building applications. Find product information, performance ratings, installation guidance, and code-recognized resources.
Radiant barrier sheathing helps reduce radiant heat transfer and improve energy efficiency in roof assemblies. Learn how radiant barriers work, where they are used, and how to specify them properly.
Engineered for concrete forming applications, plyforms provide strength, durability, and reusable performance on the jobsite. Explore panel options, performance requirements, and forming recommendations.
Medium Density Overlay (MDO) and High Density Overlay (HDO) panels feature durable resin-treated surfaces for demanding industrial and exterior applications. Find guidance on product selection, performance, and common uses.
Wood structural panel siding combines structural performance with an attractive finished appearance. Explore siding profiles, installation recommendations, finishing requirements, and product options.
From floor framing and long-span beams to mass timber panels and high-strength framing members, engineered wood products provide efficient structural solutions for a wide range of building applications. Explore APA resources for I-joists, glulam, cross-laminated timber (CLT), structural composite lumber (SCL), and rim board, including design guidance, technical specifications, performance data, and application information.
Engineered wood I-joists provide strong, dimensionally stable framing for residential and commercial floor and roof systems. Their predictable performance and long-span capabilities help support open layouts while simplifying the routing of mechanical, electrical, and plumbing systems.
Glued Laminated Timber (Glulam) is a high-strength engineered wood product used for beams, columns, headers, and long-span structural applications in residential and commercial construction. Its strength, dimensional stability, and range of available sizes make it a versatile solution for projects ranging from homes to large commercial buildings.
Cross-Laminated Timber (CLT) is a prefabricated, large-format mass timber panel used for floors, roofs, walls, and other structural building systems. Its strength, dimensional stability, and design flexibility make it an efficient solution for multifamily, commercial, and institutional construction.
Structural Composite Lumber (SCL) includes high-strength engineered wood products such as laminated veneer lumber (LVL), laminated strand lumber (LSL), and oriented strand lumber (OSL) for demanding structural applications. Its predictable strength, dimensional stability, and load-carrying capacity make it ideal for beams, headers, columns, and other heavily loaded framing applications.
Rim board is an engineered wood product designed to match the depth of I-joists and other engineered framing members. Its strength, dimensional stability, and load-carrying capacity help provide reliable transfer of vertical and lateral loads in residential and commercial floor systems.
Predictable Performance — Manufactured to rigorous standards for consistent strength and reliability.
Efficient Design — Longer spans, lighter weights, and versatile product options help solve a wide range of structural challenges.
Resource Efficiency — Engineered to maximize the value of wood fiber and support sustainable construction practices.
For more than 90 years, APA has supported the engineered wood industry through research, testing, standards development, product certification, and technical guidance. Whether you're specifying materials, designing a structural system, or evaluating product options, APA provides the trusted information professionals rely on.
Access APA's technical library for design values, span tables, installation recommendations, product reports, and specification guidance.
