The demand for commercial and multifamily construction is soaring, and the framing industry is expanding to meet this demand. APA – The Engineered Wood Association has walked hundreds of job sites and identified the most common wood construction framing errors found in today’s nonresidential buildings. This session examines the consequences of these framing mistakes from the ground up, providing practical solutions for avoiding typical issues using APA’s resources as a guide. This course is approved by AIA (1 HSW/LU) and ICC (0.10 CEU).
There are a number of power tools available in the market place for cutting large circular holes. The critical requirement is to leave a minimum of 1/8” of web material between the top or bottom of the hole and the adjacent I-joist flange. Do NOT cut into I-joist flanges. For more information please refer to APA Performance Rated I-Joists, Form Z725.
Contact the engineer of record or the I-joist manufacturer for possible field solutions.
Using an engineered wood floor assembly is one way to minimize the amount of shrinkage in this zone. Note that the building code only requires shrinkage to be evaluated in buildings over 2 stories in height. Additional information is available in Data File: Shear Transfer at Engineered Wood Floors, Form Y250.
Consider using LVL, LSL or glulam headers to minimize potential header shrinkage. A variety of engineered wood plates can also be specified to help minimize shrinkage in taller wood buildings.
There are many factors that affect the durability of wood structural panels and each situation is unique. Therefore, it is impractical to define an acceptable moisture exposure due to construction delays under all circumstances. Factors such as geographical location, seasonal weather patterns, and local weather history should be considered. Likewise, construction conditions that cause accumulation or dissipation of moisture will influence the effects on the panels. The longer panels are exposed and the more severe the exposure, the greater the effect on the panel performance. Although it is a function of both time and severity of moisture exposure, panels that are exposed to long construction delays may be unaesthetic yet remain structurally sound.
Many collated nails used with nail guns are actually of smaller diameter than standard common nails. For example, frequently available “8d gun nail” diameters might correspond to 8d cooler, 8d box or 8d sinker nail diameters (0.113 inch). In fact, in some regions of the U.S., gun-driven common nails are not stocked by distributors and may be available only by special order.
Using the NDS equations, a 15 percent reduction in shank diameter leads to approximately a 25 percent reduction in the lateral load resistance (assuming other variables remain equal) for typical wood-structural-panel-to-framing connections.
For additional information, see APA Technical Topic TT-087, Shear Wall Test Results Comparing 8d Common and 8d Box Nails. For other specifications on staples and other power-driven fasteners, contact the International Staple, Nail and Tool Association (ISANTA). ISANTA authors the ICC Evaluation Service Inc. Report, ESR-1539, which provides tables recognizing power-driven fasteners including nails and staples. ESR-1539 is available online at: http://www.icc-es.org/reports/pdf_files/ICC-ES/ESR-1539.pdf.
The 2012 and 2015 International Building Code Tables 2306.2(1) and 2306.2(2) are wood structural panel diaphragms fastened with staples. Table 2306.3(1) is for stapled shear walls. APA's Diaphragms and Shear Walls Design and Construction Guide, Form L350, includes provisions for stapled high load diaphragms. And Table A-2 provides fastener slip equations for 14-ga staples. For other specifications on staples and other power-driven fasteners, contact the International Staple, Nail and Tool Association (ISANTA). ISANTA authors the ICC Evaluation Service Inc. Report, ESR-1539. which provides tables recognizing power-driven fasteners including nails and staples. ESR-1539 is available online at: http://www.icc-es.org/reports/pdf_files/ICC-ES/ESR-1539.pdf.
The shear values for 303 siding panels (T1-11 sheathing) installed directly to the studs or over gypsum sheathing are included in Table 23 of the Engineered Wood Construction Guide, Form E30, APA Rated Siding and Footnote m. The thickness at the point of nailing at panel edges determines allowable shear wall values. This is also true for diaphragm values for grades other than Structural I.