LP SolidStart I-Joist Benefits
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LP® SolidStart® I-Joists are more versatile than open web floor trusses, and more uniform and dimensionally stable than lumber. They can be trimmed on-site, and long lengths allow ceilings and floors to be designed with fewer pieces, saving installation time. Build sturdy, stable floors with wider flanges. Benefits include:
&#; Quick Installation: Weighs less than traditional lumber.
&#; Cost-Effectiveness: Long lengths allow ceilings and floors to be designed with fewer pieces.
&#; Peace of Mind: Less likely to split, shrink, twist, warp or bow.
&#; Durable Design: Larger nailing area and increased stability.
&#; Sustainability: Wood sourced through programs certified under the Sustainable Forestry Initiative®.
&#; Lifetime Limited Warranty: Extensive product line backed by warranties you won&#;t find with traditional lumber. See complete warranty details for more information.
How It&#;s Made
LP® SolidStart® I-Joists feature an advanced design and tough build for superior performance:
Combines laminated veneer lumber (LVL) or finger-jointed sawn wood flanges with a web of oriented strand board (OSB) to produce an I-shaped structural member.
Both materials work together to resist deflection, bending stresses and shear.
LVL and MSR lumber flanges up to 3-1/2&#; wide for greater stability.
For more information on these, and other engineered wood products, please visit our Products Page.
I-joists are strong, lightweight, "I" shaped engineered wood structural members that meet demanding performance standards. I-joists are comprised of top and bottom flanges, which resist bending, united with webs, which provide outstanding shear resistance. The flange material is typically laminated veneer lumber (LVL) or solid sawn lumber, and the web is made with plywood or OSB. The robust combination of structural characteristics results in a versatile, economical framing member that is easy to install in residential and light commercial projects.
I-joists are used extensively in residential floor and roof framing. They are ideal for long spans, including continuous spans over intermediate supports. Because I-joists are straight and true, it's easier for builders to avoid crowning and maintain a level framing surface. In addition, wood I-joists are typically stocked and readily available in depths that meet the needs of residential framing.
9-1/2", 11-7/8", 14", 16". Flange widths vary from 1-1/2" to 3-1/2"; long lengths are readily available.
I-joists are popular for floor and roof framing. Many APA member-manufacturers have software design tools; contact the manufacturer (at right) for more information.
APA Performance Rated I-joists (PRIs) are manufactured in accordance with APA PRI-400, Performance Standard for Residential I-joists. This Performance Standard provides an easy-to-use table of allowable spans for applications in residential floor construction, allowing designers and builders to select and use I-joists from various member manufacturers using just one set of span tables. APA PRIs are recognized through ICC-ES ESR-.
APA trademarks appear only on products manufactured by APA member mills. The mark signifies that product quality is subject to verification through APA audit&#;a procedure designed to assure manufacture in conformance with APA performance standards or the standard shown in the mark.
Includes information on span ratings, installation details, cantilever designs, architectural specifications and engineering design properties for APA Performance Rated I-Joists.
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Access a complete list of APA publications about I-joists in APA's Resource Library.
Learn about several options that enhance the fire performance of I-joist floor systems and comply with the International Residential Code (IRC) by visiting the I-Joist Fire Assemblies page.
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A discussion of the durability and safety of wood I-joist floor assemblies in structure fires. Includes APA&#;s recommendation to increase the fire endurance of all floor-joist assemblies based on the International Building Code.
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Contains Q&A concerning fire protective coatings. Certification and inspection of products treated with fire-protective coatings are outside the scope of APA.
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APA, AWC and WIJMA jointly developed this paper that describes the history, background and intent of the IRC provisions for fire protection of floors as well as the methods used for establishing equivalence and compliance with these fire protection requirements.
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APA, AWC and WIJMA jointly developed this paper that describes the basic code recognition for prefabricated wood I-joists and the need for product certification in compliance with the codes.
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APA developed this paper that describes the basic fire protection requirements for prefabricated wood I-joists with factory-applied fire protection solutions for compliance with the codes.
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