Panels shall be supported directly on a foundation which is continuous across the entire length of the braced wall line. Wall bracing section, although the number of options and requirements has created confusion. The maximum braced wall line spacing for all buildings in sdc a and b and detached one or twofamily dwellings in sdc c is 60 feet and the maximum spacing for townhouses in. Oct 01, 2014 a portal frame wall constructed in accordance with these provisions may be substituted for any exterior braced wall line required by section r602. Alternate braced wall panel adjacent to door or window opening added. A wood structural panel such as osb is an example of a common approved wall bracing material. Step 6once the above requirements are met, each braced wall panel may be replaced by an alternate braced wall panel constructed in accordance with section 2308. For a wall 25 feet in length, the 16% prov ision would permit the length of the braced wall panel to be a total of 4 feet. For wind, braced wall lines may be spaced at 60 max 7. Lateral design of wood frame structures lateral failure woodworks. The fivepart series begins with a onehour introductory session covering wall bracing history, theory and strategy. A braced wall segment, shown in figure 5, is a segment or portion of a braced wall line. The rear braced wall line is drawn to split the offset in the rear wall line.
The end of each braced wall panel closest to the end of the braced wall line shall have an 1,800 lb 8 kn holddown device fastened to the stud at the edge of the braced wall panel closest to the corner and to the foundation or framing below as shown in condition 5 of figure r602. Green building councils leadership in energy and environmental design leed green building rating system, nahb green, and state and city specific green building codes. Multiple braced wall segments form braced wall lines, as shown in figure 6. A braced wall panel keeps the wall square by transferring shear from the top of the wall to the bottom braced wall panels are built in a specific way braced wall panel has a specific amount of resistance panels are placed at specific locations within a braced wall line to resist the lateral loads typically the ends of. A braced wall panel is a segment of a braced wall line consisting of the wood structural panel e. Tirc braced wall panel development background wsp 2009. The provisions are generally based on the 2012 irc simplified wall bracing provisions. Alternate braced wall lines constructed in accordance with one of the following provisions shall be permitted to replace each 4 feet 1219 mm of bracedwall panel as required by section r602. It should be noted that both of these sections impose a 10foot height limit on alternate braced wall panels. Continuous wood structural panel bracing method added. Is a braced wall line permitted to be braced with a single braced wall panel 48 inches in length. With support from simpson strongtie, both of the proposals were approved. Resident gis maps fair housing rights in hastings enotifications submit a suggestion file a report residents document central.
This setup represents the lower bound of the irc braced wall panel method wsp using 3 8 osb for the bracing panels located near the maximum allowed distance from the ends of the braced wall line per irc section r602. Rectangle sides 60 feet long or less ratio of side length a maximum of 3. I read that braced wall panels made onsite with osb have to be. So in the 2015 irc, bracing method pfh will require an embedded straptype holdown with a minimum capacity of 3,500 lbs. The details are adapted from some of apas most frequently requested publications and can be searched for by title or browsed for within several defined product and constructionsystem categories, such as panel wall construction and. Conventional lateral bracing requirements for single family. Introduction to wall bracing johnson county, kansas. Udc wall bracing provisions permanent rule effective september 1, 2014 a how to guide for use of the new provisions summary. The spacing for braced wall lines that have parallel braced wall lines on both sides is the greater of the distance between each braced wall line see figure r602. Interior braced wall lines must comply with the same provisions as exterior braced wall lines.
Mixing intermittent bracing and continuous sheathing. Conducted for the membership of the foam sheathing committee fsc. One of the key milestones that launched us down this path was the development of our first factorybuilt wood shearwall the strong wall. These panels shall begin no more than 10 feet from each end of a braced wall line and the. There shall be a braced panel in every 250 of a braced wall line, with not less than two braced panels on a braced wall line. Is an interior braced wall line permitted to be braced with a single braced wall panel 48 inches in length. The building codes ibc and irc use the terms braced wall panel and braced wall. The same will hold true for the alternate braced wall panel adjacent to a door or window opening bracing method in the 2015 ibc.
Explore a searchable database of us construction and building code. Intermittent and continuously sheathed braced wall panel s shall be constructed in accordance with this section and the methods listed in table r602. Residential structural design guide 2000 edition hud, 2000 available as free download at. The wall bracing webinar series is presented by apa and aibd american institute of building design. Construction methods for braced wall panels upcodes. These solutions will allow for narrower braced wall panels to be used provided additional framing details are used. Special connection requirements for braced wall panels. A braced wall line shall consist of braced and or alternate braced wall panels that meet the requirements for location, type, and amount of bracing. Where a brace panel exceeds 12 feet in height, it shall have a heighttowidth ratio of not more than 2. A guide page 3 manner, offsets can affect braced wall panel location and, thus, the layout of openings for windows and doors in a series of braced wall lines on a given building side elevation. Using this setup, sbcri tracked the flow of loads from the input at the trusses, through the braced wall lines and into the foundation. Lengths of braced wall panels for continuous wood structural panel sheathing shall be in accordance with section. As a minimum, it is recommended that when using strong wall panels, the foundation match the requirements for the alternate braced wall panel method abw in the irc or ibc.
Framing and bracing sample drawings autocad details. For the first floor of a 2story condition, the required total length per each 25 of braced wall line must be 21 4 or. Use of this worksheet is demonstrated in a separate design example supplement to this guide. Hps hardboard panel siding abw alternate braced wall pfh intermittent portal frame pfg intermittent portal frame at garage a. Wall bracing options for foamsheathed wall systems section 6. For a gable end wall, if the bracepanel height does not exceed 12 feet at the highest portion and if the 12. This allows for direct comparison of alternate materials to establish equivalency. Braced wall lines are basic elements in conventional light frameconstruction and shall consist of braced wall panels. Each 32 alternate braced wall panel may be substituted for a 48 braced wall. When alternate braced panels are required to be sheathed on both faces, walls may be braced on one side of the wall only when the panel thickness is increased to a nominal 1 2inch 12.
Lengths of alternate braced wall panels shall be in accordance with section r602. The simpson strongtie commitment to product design and testing over the years has resulted in us taking a wholesystems approach to building design. Testing was performed using astm e564 procedures and resulted in a two 30 shear wall four braced. Forget what you knew about the previous wall bracing provisions this method is a different concept. Jul 16, 2009 i read that braced wall panels made onsite with osb have to be. As shown in the floor plan below figure 1, four exterior braced wall lines are identified.
Ibc portal frame bracing method archives simpson strongtie. In a continuouslysheathed wood structural panel braced wall line, the minimum braced wall panel length shall be permitted to be in accordance with table r602. Required wall bracing for wind is based on the spacing of braced wall lines and adjustment factors including wind exposure 5. Lengths of alternate braced wall panels shall be in accordance with section. The braced wall panels are also permitted to begin no more than 12. Code regulations are consolidated by state and city for easier navigation.
Draw a rectangle around the perimeter of the building and stagger the required number of bracing units along the four wall lines. Resources and references in addition, appendix a to this guide provides a useful wall bracing design and plan check worksheet. Additional sessions address related topics, including meeting code requirements with wall bracing, the simplified wall bracing. Braced wall panel has a specific amount of resistance. Actual performance of the braced wall panels within the braced wall line a. All of the details are available to download free of charge in four file formats. Irc wall bracing applied building technology group.
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