Elements that participate in carrying the load need to be properly detailed for seismic requirements 3. The fasteners also provide a load path for transferring the drag loads into the shear walls below, see Figure 1. The maximum force occurs at the point where the drag strut attaches to the parallel wall. When you have a wall on the level above that must have its lateral forces and overturning moment transferred to the wall below (i.e. For more information on designing drag struts, please refer to . Seismic force resistance is … Moment Applied to Top of Wall . to Connect Drag Strut Trusses to Wall Top Plates TER No. All elements either need to be isolated, or will participate in carrying the load 2. The structural concept of drag struts and brace frames is for the drag strut to “drag” (collect) the forces of lateral seismic motion and bring them to a brace frame (or other rigid bracing element like a shear wall) and channel those horizontal forces into a vertical force through the foundation and finally into the ground. The steel strap will be nailed from the top plate of wall -1 and be continuously nailed to B blocking or beams on the underside of the diaphragm until it reached the top plate of Wall -B2. the wall or structural framing member. Do not skimp on end of wall steel Control Joint. Normally, the chords and drag struts … S. TRUT . Need drag strut/collector to get shear to solid portion. 1306-01 OMG, Inc. d/b/a/ FastenMaster Subject to Renewal Issue Date: June 25, 2013 Updated: March 12, 2018 : April 1, 2019 153 Bowles Road Agawam, MA 01001 413-789-0252 fastenmaster.com mguthrie@olyfast.com DIVISION: 06 00 00 – WOOD, PLASTICS, AND COMPOSITES … • Diaphragm and shear wall sheathing shall not be used to splice boundary elements. You can help Wikipedia … traditional segmented shear wall approach, drag strut method, and cantilevered beam analogy. In Figure 4-31, a member is added to collect the diaphragm shear and drag it into the short intermediate shear wall. drag strut to shear wall detail nts 06 garage portal detail 04 nts (n) post cap and base detail (typ.) • Shear wall • Drag strut (or collector) • Diaphragm • Collector beam (or drag strut) Vertical Plane Horizontal Plane 17 Rigid v. Flexible Diaphragm •Importance •Distribution of load to shear wall •Flexible •Diaphragm load is distributed to shear walls by tributary area •Rigid •Diaphragm load is distributed to C. ONNECTION TO . Shear Walls 31 Drag Struts and Collectors • Shear forces: generally considered to be uniformly distributed across the width of the diaphragm. Also, in perforated shear walls, more attention in the detailing and design is needed above doors and windows, where framing functions as drag struts. T. RUSS . For those of you not familiar with this type of truss, this article will help you to understand how this works. Shear walls are typically light-framed or braced wooden walls with shear panels, reinforced concrete walls, reinforced masonry walls, or steel plates. 4.2 Steel to wood Lap Splice Connection Design Connection Type 1. In order to ensure a uniform force transfer, the design professional is required, by sub-sections 2.3.2.4 (a), (b), (c) of the truss standard, to furnish and denote the location, … Most shear walls will have openings 4. These discrepancies are what led APA to perform full-scale wall tests on FTAO design methodology, intended to prove that the application of FTAO can be more practical and simultaneously provide the most design flexibility. F. IGURE . Click the … The benefit of perforated shear walls is that they only need to be anchored at … • Drag struts and collectors: transfer load from the diaphragm to the lateral force resisting system. The strut force changes along the length of the drag strut. The Pro Drag Strut is the result of many years of development in drag racing combined with 20+ years of … Shearwalls Tutorial 5.4-A explains how to interpret the deflection, hold-downs, drag strut and wind suction results. 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