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. APA PRIs are recognized through ICC-ES ESR-1405.ĪPA trademarks appear only on products manufactured by APA member mills. 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. Many APA member-manufacturers have software design tools contact the manufacturer (at right) for more information.ĪPA Performance Rated I-joists (PRIs) are manufactured in accordance with APA PRI-400, Performance Standard for Residential I-joists. I-joists are popular for floor and roof framing. Flange widths vary from 1-1/2" to 3-1/2" long lengths are readily available. In addition, wood I-joists are typically stocked and readily available in depths that meet the needs of residential framing.ĩ-1/2", 11-7/8", 14", 16". Because I-joists are straight and true, it's easier for builders to avoid crowning and maintain a level framing surface. They are ideal for long spans, including continuous spans over intermediate supports. I-joists are used extensively in residential floor and roof framing. The robust combination of structural characteristics results in a versatile, economical framing member that is easy to install in residential and light commercial projects. The flange material is typically laminated veneer lumber (LVL) or solid sawn lumber, and the web is made with plywood or OSB. I-joists are comprised of top and bottom flanges, which resist bending, united with webs, which provide outstanding shear resistance. I-joists are strong, lightweight, "I" shaped engineered wood structural members that meet demanding performance standards. USDA Forest Service Forest Products Laboratory.Engineered Wood Technology Association (EWTA).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |