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Floor Systems

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Engineered Wood Floor Systems

Engineered wood products deliver the strength, consistency and design flexibility that builders, designers and architects depend on for floor construction. From single-layer subfloor assemblies to premium multi-layer systems, wood structural panels are manufactured to meet rigorous performance standards. Comprehensive span ratings and performance categories make it straightforward to select the right panel for your application, ensuring your floor system is engineered to perform from the framing up. In addition to wood structural panels and rim board, engineered wood beams like I-joists, glulam and laminated veneer lumber (LVL) are commonly used solutions to provide the support system for floors.

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Underlayment & Subfloor

Build a solid foundation with the right panel system

Choosing the right subfloor and underlayment combination is the foundation of any successful floor system. Learn the difference between APA Rated Sturd-I-Floor® and APA Rated Sheathing, how span ratings work and how to match your panel selection to your finish floor.

Underlayment & Subfloor

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Raised Wood Floors

Elevate your build with a time-tested floor system

Raised wood floors have been a staple of American home construction for centuries. Built on a foundation of beams, girders and floor joists sheathed with wood structural panels, a raised wood floor elevates the living space above ground moisture, pests and problematic soils. This system offers practical advantages for trades scheduling, utility access and long-term maintenance.

Raised Wood Floors

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Premium Floor Assembly

Deliver a stiffer, quieter floor that buyers notice

For builders and designers seeking a high-performance floor, this premium I-joist assembly delivers exceptional stiffness, reduced vibration and a solid underfoot feel. This method can also simplify mechanical and plumbing installation, providing material savings that largely offset the cost of the upgraded components.

Premium Floor Assembly

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I-Joist Fire Assemblies

Meet IRC fire protection requirements with confidence

Meeting IRC fire protection requirements for residential floor assemblies doesn’t have to be complicated. APA provides guidance on meeting IRC fire protection requirements with seven code-compliant assembly options, so you can take full advantage of I-joist performance benefits without sacrificing fire safety.

I-Joist Fire Assemblies

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ADOBE STANDARD LICENSCING | Standard licenses Most Adobe Stock photos, vectors, and illustrations come with a Standard license. With a Standard license, you may: •     Reproduce up to 500,000 copies of the asset in all media, including product packaging, printed marketing materials, digital documents, or software. •     Include the asset in email marketing, mobile advertising, or a broadcast or digital program if the expected number of viewers is fewer than 500,000. •     Post the asset to a website or social media site with no limitation on views. •     Include the asset in some types of products, such as inside a textbook, as long as the primary value of the product is not the asset itself, and the product is not reproduced more than 500,000 times. •     Share the unmodified asset with your employees and contractors who have contractually agreed to abide by the license terms. •     Transfer the license to your client or employer. (With a Standard license, you may not: •     Distribute the stand-alone file. •     Create merchandise, templates, or other products for resale or distribution where the primary value of the product is associated with the asset itself. For example, you can't use the asset to create a poster, t-shirt, or coffee mug that someone would buy specifically because of the asset printed on it. •     Transfer the license to more than one employer or client, unless separately licensed for each.) Copyright: © Adobe Stock Prevent Callbacks in Wood Flooring Installation Technical Note - T350 This publication discusses how to minimize the risk of future wood flooring problems when moisture at the jobsite is an issue Engineered Wood Construction Guide: Floor Construction Excerpt - E30X-FC This publication is an excerpt from the APA Engineered Wood Construction Guide, providing information about floor framing and wood structural panel products APA Case Study: Raising Up Raised Wood Floors - Murray House in St. Augustine, Florida Builder Tips: Construct a Solid, Squeak-Free Floor System Builder Tip - Q300 This publication describes how to prevent floor complaints and callbacks with proper floor sheathing installation Timberlab's Sunnydale Community Center Site Acoustic Performance of All-Wood Floor Systems Technical Note - T230 This publication describes single- and double-layer all-wood floor assemblies for acoustic performance and includes both construction details and acoustic ratings Performance Rated I-Joists Design and Construction Guide Construction Guide - Z725 This publication discusses span ratings, installation details, cantilever designs, architectural specifications and engineering design properties for APA Performance Rated I-Joists

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