Prescriptive Shear Wall

Wall studs shall be capped with minimum 2x4 double top plates to provide overlapping corners. Identify the prescriptive path or provide calculations. ), yet clearly qualify as components and cladding. is governed by prescriptive criteria which include wall height to thickness ratios, shear wall length and spacing, minimum wall NCMA TEK TEK 14-8B. Shear Wall Design Examples Several design tools and standards to assist engineers, architects, and building officials with the design of shear walls are available. 0007 times gross cross-sectional area of wall Use prescriptive reinforcement of (0. The panel's length meets the requirements of its particular bracing method and contributes toward the total amount of bracing required along its braced wall line. _____ reinforced shear wall (7. Only first-floor shear walls and hold-downs will be analyzed in this example. I re-read R602 this morning and could not find anything related to shear wall sheathing and the rim joist. The full grout adds to the weight of the wall, and hence the seismic force. CHAPTER 6 WALL CONSTRUCTION SECTION R601 GENERAL R601. This usually means that a full foundation with footings to the frost depth, and a complete lateral force resisting system are required. LEARN MORE >. All-In-One Sheathing Panel Insulates and Protects. All seams between panels used to resist lateral loads must be backed by solid wood framing. The document consists of both a Provisional Standard and a Commentary that is not part of the Provisional Standard. Reinforcement for Wall Openings. - portion of the shear wall that runs from the diaphragm above to the diaphragm/foundation below - aka full height segments, "piers" - Shear wall segments occur between openings in the shear wall - Only full height segments can be used to transfer the load from the diaphragm above to the floor below. 2013 Changes in The Masonry Code. ) is a practical lower limit for special structural walls. Under prescriptive design codes for conventional construction, shear walls are referred to as braced wall panels. 1 states that; Where out-of-plane offsets occur, portions on the wall on each side of the offset shall be considered separate shear wall lines". Shear 11-15 Prescriptive Wall Bracing 16-18 Frame Inspection 19-33 Roofing 34-36 Energy Conservation Inspection 37-41 Final Inspection 42-44 Swimming Pool 45-46 Demolition 46 PLUMBING Pages 47-72 Underground 48-51 Underfloor 52-58 Rough 59-62 Final 63-65 Tables 66-72 MECHANICAL Pages 73-97 Underfloor 77-80. No need to calculate loads. Shear Walls Engineered solution Per IBC 2. Floor and roof decks are diaphragms). ), whereas the construction details for a shear wall are determined through. In this situation, the primary recourse for the engineer is to simplify or test. 5): Reinforced wall with prescriptive reinforcement of detailed plain shear wall. Mechanics of Multi-story Segmented Shear Walls and Load Combinations 5. The main goal of this study was to confirm and improve methods of evaluating the in-plane shear capacity of ICF walls. Pre-Engineered and Prescriptive Foundation Designs Drawing No. The Wall-Bracing-Length Calculator is a quick and easy tool to help calculate the required length of wall bracing per the 2009, 2012 or 2015 International Residential Code. If the side wall extends to the ceiling, lateral shear load is applied to the wall from the top plate, functioning as a drag strut. Shear wall nailing per engineering; R 301. The fol-lowing summarizes these requirements as they apply to concrete masonry construction. and engineered shear walls) to address varying prescriptive wall insulation requirements found in each of. Some building codes do provide prescriptive methods and nailing patterns but the shear and uplift values must be calculated to determine the schedule. Durability of Cold-Formed Steel Framing Members. _____ reinforced shear wall (1. reduce the braced wall line spacing) as shown in Figure 3. In many cases, due to shear wall size, fastener schedule, sheathing type, framing details, etc. 3 of the 2000 IBC, “Members that act as both part of the main force resisting system and as components and cladding shall be designed for separate load cases” (ICC, 2000; AISI, 2003). 11 Wall anchorage - Section R403. Prescriptive Method for One and Two Family Design of End Posts for Diaphragm Shear Walls. There are several design tools and standards to assist engineers, architects, and building officials with the design of shear walls. Lateral Bracing - Prescriptive Lateral Bracing; Lateral Analysis - Shear Wall, Frames Design & Detailing; Foundation Design - Basement Retaining Walls, Stem Walls, Pad and Continuous Footings, & Embedded Posts; Miscellaneous Design and Analysis - Open and Underground Storage Tanks, Landscape Retaining Walls. For years, homes have been braced using a variety of techniques that have withstood the elements over time. When using Tables 321. The narrow side walls in a moment resisting portal should be sized for the load (and deflection), applied to the top of the narrow side wall. 1 summary 123 6. The next step is to secure the floor joists to the top plate of the cripple wall. More recent testing done by Thurston and Beattie (2008), using construction techniques and standards conforming to the New Zealand code of practice, showed that for an isolated wall panel with masonry veneer, the. 23/32" plywood required for 24" joist spacing. Wood shear walls are the primary lateral load-resisting components in light-frame residential wood construction in the United States. DBSD FOR MASONRY STRUCTURES: BACKGROUND AND TRIAL APPLICATION 973. , braced wall panel) that is specifically braced to prevent racking of the studs in domino fashion as the floor or roof diaphragm above transfers shear (racking) forces into the plane (length direction) of a braced wall line (braced wall. A point could also be made here about perforated shear wall design, both for the approach in which shear transfer around the openings explicitly engineered, and the approach where this is not addressed (and the perforated shear wall reduction tables are used). is based on a prescriptive force based design methodology. Other propriety systems or uncommon engineering-critical solutions will also be discussed and how to approach those. Six of these standards addressed the design of structural elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls. 5 shear distortion and rotation interaction 117 5. Shear wall nailing per engineering; R 301. For strawbale construction, see Appendix R. Evaluate a prescriptive and engineered design methodology for perforated wood shear walls. One very specific provision pertinent to tall wall design is the wall stud bending strength and stiffness design value increase, where reference bending and bending stiffness values are permitted to be. These forces are shear and uplift. 13 Engineer’s Calculations. between fasteners for nails and screws and not greater than 6" with staples. 3 shear friction model 114 5. When used in prescriptive wall framing, LP SolidStart LSL and LVL can be directly substituted for the equivalent size of No 2 or lower grade dimensional lumber. When used in prescriptive wall framing, LP SolidStart LSL and LVL can be directly substituted for the equivalent size of No 2 or lower grade dimensional lumber. Sweat Equity: Cripple walls a key part of earthquake retrofitting. costs associated with site-built plywood shear walls. • Braced Wall Panel: A full-height section of wall constructed to resist in-plane shear loads through interaction of framing members, sheathing material and anchors. In an effort to simplify it, Simpson Strong-Tie has developed a Wall-Bracing-Length Calculator —a quick and easy tool that helps calculate the required length of wall bracing in accordance with the International Residential Code. 11 of the IBC and section R602. Shear Wall Values for Light Weight Steel Framing Light Gauge Steel Research Group Santa Clara University, Santa Clara, CA 95053 1. Prescriptive Method for One and Two Family Dwellings 2007 Edition with Supplement 2 Revision of: AISI/COFS/PM-2006 E11 Shear Wall Design (High Seismic Area. prescriptive wall framing is permitted in accordance with sections 2308. 2013 Changes in The Masonry Code. All seams between panels used to resist lateral loads must be backed by solid wood framing. Prescriptive approaches such as those outlined in International. , and Hago, A. shear wall designs. For parallel shear, the equations do not address overturning and bending action. However, significant scatter in the results make it clear that achieving a target level of ductility. Section 2 provides specific details regarding the application of plywood in single or multilayer floor systems, while Section 3 provides. al walls (shear walls) in regions of high seismic risk or in structures assigned to high seismic performance or design categories. Soil report is required if the proposed construction is located in a liquefaction, landslide, Alquist-Priolo, Sierra Madre or other earthquake fault zone. A diaphragm structure results when a series of such vertical and horizontal diaphragms are properly tied together to form a structural unit. It is used in prescriptive design all the time especially for interior shear. For parallel shear, the equations do not address overturning and bending action. Five types of shear walls that serve as the lateral force-resisting system are described. CODE DESCRIPTION COMMENTS Printed 1/8/2018 Report No BPR018 Discipline: Residential Code Year: PROBLEM CODES BPRR2 WWINDH When a building design does not allow for compliance of the prescriptive wall bracing requirements of the 2012 Virginia Residential Code, the design may need to incorporate an engineered methodology such as chapter 23 of. SpeedCore is a revolutionary concrete-filled composite steel plate shear wall (CF-CPSW) core. Concrete slabs-on-grade. Among the most common areas of damage are the coupling beams. The plans should include “braced wall lines,” defined as “a straight line through the building plan that represents the location of the lateral resistance provided by the wall bracing,” as well as “braced wall panels,” defined as “a full-height section of wall constructed to resist in-plane shear loads through interaction of. R 602, R 602. The other standards addressed such topics as a code of standard practice, the definition of standard product, and prescriptive design for residential applications. With this collapse, the house appears to have been vaulted to one side on its sub-area walls. Shear Walls or Braced Wall Panels Check plans for lateral restraint or alternate braced panels per R602. "Mathematical model for latera l stiffness of shear walls with openings. Prescriptive approaches such as braced wall provisions outlined in the IRC are different in many respects from prescriptive provisions in AWC's WFCM. Prescriptive approaches such as those outlined in International. _____ reinforced shear wall (1. Lateral Bracing - Prescriptive Lateral Bracing; Lateral Analysis - Shear Wall, Frames Design & Detailing; Foundation Design - Basement Retaining Walls, Stem Walls, Pad and Continuous Footings, & Embedded Posts; Miscellaneous Design and Analysis - Open and Underground Storage Tanks, Landscape Retaining Walls. [ Download] Prescriptive Methods. The Wall-Bracing-Length Calculator is a quick and easy tool to help calculate the required length of wall bracing per the 2009, 2012 or 2015 International Residential Code. Slabs-on-grade shall be minimum 3-1/2-inches. Furthermore, applicable references and suggested modifications and additions to the design recommendations in Requirements for Design of a Special Unbonded Post-Tensioned Precast Shear Wall Satisfying ACI ITG-5. [ Download ] Corrosions & Durability. 1 Shear Wall Configurations in Buildings Masonry shear walls can have a variety of plan and. 10 -- provides charging language for two simplified bracing approaches (isolated panel and continuously sheathed), an engineered approach, the IRC 2012 provisions and APA SR-102. When used in prescriptive wall framing, LP SolidStart LSL and LVL can be directly substituted for the equivalent size of No 2 or lower grade dimensional lumber. Section R602. I prefer to square my walls, sheath them, and then stand them. Section R602. Seismic Design of Cast-in-Place Concrete Special Structural Walls and Coupling Beams: A Guide for Practicing Engineers The basic structural elements of an earthquake-resistant building are diaphragms, vertical framing elements, and the foundation. Chapter A2 Earthquake Hazard Reduction in Existing Reinforced Concrete and Reinforced Masonry Wall Buildings With Flexible Diaphragms Chapter A3 Prescriptive Provisions for Seismic Strengthening of Cripple Walls and Sill Plate Anchorage of Light, Wood-Frame Residential Buildings. Most walls will have window or door openings or both. In certain. Some building codes do provide prescriptive methods and nailing patterns but the shear and uplift values must be calculated to determine the schedule. Wall Bracing Options 36 Wall Bracing Options 1. 6 shear strength and drift capacity of test specimens and comparison with other studies 119 chapter 6 summary and conclusions 6. The prescriptive method that does not require an engineering solution. The Envelope Process 7. In addition, the requirements for ordinary reinforced concrete structural walls and the requirements of 21. I have found the folks at Simpson-Strongtie to be most helpful in analyzing various applications, and then [ naturally ] offering one or some of their products to meet the prescriptive design. However, a modification. 4): Reinforced wall with prescriptive reinforcement of detailed plain shear wall. Shear 11-15 Prescriptive Wall Bracing 16-18 Frame Inspection 19-33 Roofing 34-36 Energy Conservation Inspection 37-41 Final Inspection 42-44 Swimming Pool 45-46 Demolition 46 PLUMBING Pages 47-72 Underground 48-51 Underfloor 52-58 Rough 59-62 Final 63-65 Tables 66-72 MECHANICAL Pages 73-97 Underfloor 77-80. Concrete slabs-on-grade. Wood Shear Walls with Corners PATH (Partnership for Advanced Technology in Housing) is a new private/public effort to develop, demonstrate, and gain widespread market acceptance for the "Next Generation" of American housing. For parallel shear, the equations do not address overturning and bending action. For wall applications designed with the tables in this guide, notching and drilling shall be limited to the restrictions of notes 4 through 6 (see details to left). There is a tutorial and a design example on the Bracing Selector web page, but it's very easy to use so you may just want to dive right in. If the side wall extends to the ceiling, lateral shear load is applied to the wall from the top plate, functioning as a drag strut. ), yet clearly qualify as components and cladding. Often walls that require reinforcement at 16 in. The results will give designers and builders a better understanding of the complexity of shear wall code provisions and how to go about designing and constructing shear walls through clarifying code intent. 5 shear distortion and rotation interaction 117 5. Shear walls have specific design values depending on their construction, fastener spacing, fastener size, sheathing thickness and framing species. Concrete slabs-on-grade. Two AWC standards utilized throughout the nation for a code compliant design of wood shear walls are 2018 Wood Frame Construction Manual (WFCM) for One- and Two-Family Dwellings and 2015 Special Design Provisions for Wind and Seismic (SDPWS). A wall designed (engineered) to resist lateral forces parallel to the plane of the wall. standards for conducting cyclic load testing of assemblies. For strawbale construction, see Appendix R. The roof, interior, and exterior shear walls can be looked at in one inspection. The updated SDPWS contains new provisions for design of high aspect ratio shear walls. Some building codes do provide prescriptive methods and nailing patterns but the shear and uplift values must be calculated to determine the schedule. Wherever possible, the walls should be anchored as soon as possible after they have been plumbed and aligned. The provisions of IRC Section R404 become mandatory for wall heights of 5 feet and greater and for walls retaining unbalance fill of 4 feet or greater. Because each panel is 4-6-1/2 in. 9 Shear Walls 14 Qamaruddin, M. 0 and lower). Also, for gable-shaped roofs where sheathing bears over gable end wall framing, special fastening is required. or separate inspections. CHAPTER 6 WALL CONSTRUCTION SECTION R601 GENERAL R601. 5): Reinforced wall with prescriptive reinforcement of detailed plain shear wall. The WFCM has recently been updated and contains both a prescriptive and engineering design approach. 1 summary 123 6. Walls framed with 2x6s can be braced with inset shear panels. MiTek Publishes Hardy Frame Prescriptive Design Guide, Offering Alternative Braced Wall Solutions with HFX Panels that Comply with 2015 IRC “We’ve been providing Prefabricated Shear Wall. 9) and transition from Seismic Performance Categories to Seismic Design Categories (SDCs) (see TEK 14-18A, ref. 25-I and J to determine the required amount of bracing the nominal wall height is measured to the top of the wall top plate at the bearing elevation of the roof structural assembly (trusses or rafters). The provisions of this chapter shall con-trol the design and construction of all walls and partitions for all buildings. Shear walls shall be supported by continuous foundations. Prescriptive approaches such as those outlined in International. A point could also be made here about perforated shear wall design, both for the approach in which shear transfer around the openings explicitly engineered, and the approach where this is not addressed (and the perforated shear wall reduction tables are used). - portion of the shear wall that runs from the diaphragm above to the diaphragm/foundation below - aka full height segments, "piers" - Shear wall segments occur between openings in the shear wall - Only full height segments can be used to transfer the load from the diaphragm above to the floor below. The WFCM contains both a prescriptive and engineering design approach. The prescriptive seismic detailing requirements for each of three reinforced masonry shear walls types, ordinary, intermediate, and special, are explained, with particular attention to special reinforced shear walls. walls (eaves) should use Zones 2 and 3 fastening. Braced Wall Panel (R602. • revised seismic design requirements, including prescriptive shear wall reinforcement (see TEK 14-18A, ref. In bearing walls and shear walls, when the plan length of openings exceeds approximately one-half the total plan length of the wall, and lateral forces act on the walls whether in-plane or out of plane, flexural tensile stresses generally become so large that the walls must be. • Shear Walls Design Examples: • 2012 IBC/IRC Recognition • 2012 WFCM Prescriptive • 2012 WFCM Engineered • 2008 SDPWS • Anatomy of a Shear Wall • Elements of a shear wall • Strength and stiffness • Detailing and limitations Outline 6 AWC Design Standards. R404 rather than the footing stem wall provisions of IRC Section R403. 10 and 2308. This code applies to the construction, reconstruction, and repair of one- and two-family dwellings and townhouses. the performance of both 8 and 9 feet (2. 2017 ORSC Prescriptive Wall Bracing Calculator - Wind Instructions This calculator is not intended to teach the user how to do a lateral bracing calculation or teach code. ” The Hardy Frame. 6 | STRONG-WALL® SHEARWALLS PRESCRIPTIVE DESIGN GUIDE T-SWPDG10 ©2010 SIMPSON STRONG-TIE COMPANY INC. The legacy Strong-Wall shearwall can be installed around window and door openings, on garage wing walls, interior walls or any other locations where increased lateral resistance is required. Design a wood frame wood structural panel shear wall shear loads. The prescriptive designs specify. z flashing horizontal joint detail within wall block behind horizontal panel joints of sheathing for all shear walls plywood sheathing galv. The equations below are used to check perpendicular and parallel shear in masonry walls. Research and Development Walter P Moore and Associates. _____ reinforced shear wall (1. Braced Wall Panels Prescriptive solution Per IRC, Section R602. Bracing Units Simpler prescriptive solution. reinforcement, sill, anchor bolt spacing, stud size and spacing, wall insulation, interior, exterior finishes, roof attachment, attic insulation, etc. 3 DESIGN PRINCIPLES FOR SPECIAL REINFORCED MASONRY SHEAR WALLS 3. Important Information & General Notes 1. Prescriptive wall bracing requirements / details. 10 Code and Commentary for 2012 NC Residential Code - final 03/06/13 Commentary italicized and printed in red 1. In the preceding lecture on structural design of masonry, we have seen examples of unreinforced masonry elements. The purpose of this chapter is to pro-mote public safety and welfare by reducing the risk of death or injury that may result from the effects of earthquakes on existing unreinforced masonry bearing wall buildings. Reinforcement for Wall Openings. R404 rather than the footing stem wall provisions of IRC Section R403. Shear Walls Engineered solution Per IBC 2. IRC Wall Bracing: A Guide for Builders, Designers and Plan Reviewers With Supplemental Information on Appropriate Use of Foam Sheathing The requirement for bracing conventional wood frame dwellings is not new. So I can't blame him for his turnaround in approval. Keywords: Narrow shear walls, Portal frame, Bracing units 2. However, say they are in the same line essentially with an jog in at the front door, then those wall segments would take the total shear load not the shared load. • When wall height is less than wall length the wall is consider squat • Clause 10. Shear Walls The engineered version of wall bracing is a shear wall. 9), • for allowable stress design, revised allowable fl exural tension values for unreinforced grouted masonry elements. It is intended to help the user present their work to their local jurisdiction in an easy to follow format and do the math for the user. These Hillside Anchors (as Thor Matteson calls them) resolve the lateral forces into a collector that is anchored sideways to an uphill footing, rather than tying the shear wall to the sill plate and anchor bolts. Braced Wall Panel (R602. MiTek has published a new Hardy Frame Prescriptive Design Guide that provides an overview of braced wall design, a flow chart of the design and specification process, and specific instructions to properly apply the Hardy Frame Alternative Braced Wall Solution. Construction (Prescriptive Method) provides prescriptive requirements to facilitate the use of SIPs in wall systems for the construction of one- and two-family dwellings. Braced Wall Panels Prescriptive solution Per IRC, Section R602. Prescriptive approaches such as those outlined in AWC's 2015 Wood Frame Construction Manual (WFCM) for One- and Two-Family Dwellingsand 2015 WFCM High Wind Guidestend to provide conservative results. Wherever possible, the walls should be anchored as soon as possible after they have been plumbed and aligned. These reinforced boxes are framed with 2x4s and sheathed with OSB. You will need to provide the information requested in the drop-down menus that follow. approaches is the IRC assumes shear walls resist overturning momentsbased onlyonthe overturn-ing resistance resulting from dead load and adja-cent perpendicular walls. Other propriety systems or uncommon engineering-critical solutions will also be discussed and how to approach those. Shear 11-15 Prescriptive Wall Bracing 16-18 Frame Inspection 19-33 Roofing 34-36 Energy Conservation Inspection 37-41 Final Inspection 42-44 Swimming Pool 45-46 Demolition 46 PLUMBING Pages 47-72 Underground 48-51 Underfloor 52-58 Rough 59-62 Final 63-65 Tables 66-72 MECHANICAL Pages 73-97 Underfloor 77-80. With this collapse, the house appears to have been vaulted to one side on its sub-area walls. Braced wall panels serve the same function and have very similar detailing as some shear wall assemblies; however, the term "shear wall" is most frequently associated with an engineered structural system. Section R602. foundation, shear wall, roof truss, retaining walls exceeding 4 feet, etc. 6 | STRONG-WALL® SHEARWALLS PRESCRIPTIVE DESIGN GUIDE T-SWPDG10 ©2010 SIMPSON STRONG-TIE COMPANY INC. and engineered shear walls) to address varying prescriptive wall insulation requirements found in each of. The next step is to secure the floor joists to the top plate of the cripple wall. Q: My building department says that parts of my house plans—such as the walls next to the garage-door openings—don't meet wall-bracing rules. At each inspection, however, all connections for the entire load path must be complete to verify that the lateral distribution path is complete and that the framing supporting the shear system is as per plan. Verify roof eave rafter tales/sheathing does not project into fire separation distance @ property line per R302. And confirm that the construction meets the approved engineering or the prescriptive design. centilated buckling issues by a)rnbinine wall bracing requirements (prescriptive shear walls) with continuous garage International Code Council (ICC) provi Sions limit prescriptive solutions to simple span headers that are 18 feet maximum (plus the widths of the braced wall w. Lookahead by Luca Bonacorsi Date: This presentation provides an overview of the Awv-510 Transfer Around Openings FTAO shear wall design approach, recent research in this area, and a side-by-side comparison of design results between segmented, perforated, and FTAO design methods. In the 2009 IRC, braced wall panel joints require blocking, or if not, then it is specified to increase bracing amounts by a factor of two, see 2009 IRC Sec. 10 of the International Residential Code calls for "braced wall lines" composed of "braced wall panels. Unlike engineered designs, prescriptive designs can be drawn by nearly anyone with a ruler, paper, pen, basic drawing skills and a general understanding of the prescriptive design requirements described in this brochure and the "Braced Wall Panels" brochure. 13 Engineer’s Calculations. Design Example 1 Four-story Wood Light-frame Structure OUTLINE 1. IRC Wall Bracing: A Guide for Builders, Designers and Plan Reviewers With Supplemental Information on Appropriate Use of Foam Sheathing The requirement for bracing conventional wood frame dwellings is not new. Standard For Cold-Formed Steel Framing - Lateral Design - 2004 1 STANDARD FOR COLD-FORMED STEEL FRAMING - LATERAL DESIGN A. North American Standard for Cold-Formed Steel Framing - Prescriptive Method for One and Two Family Dwellings, 2007 Edition with Supplement 2 (AISI-S-230-07w-S2-08). Seismic Design of Cast-in-Place Concrete Special Structural Walls and Coupling Beams: A Guide for Practicing Engineers The basic structural elements of an earthquake-resistant building are diaphragms, vertical framing elements, and the foundation. Therefore, it is possible for Tilt-Up shear wall panels to be classified as ordinary precast shear walls, intermediate precast shear walls and special reinforced concrete shear walls. Bracing Units Simpler prescriptive solution. Prescriptive seismic reinforcement is sufficient for shear. It has to be on both sides of the wall but it does have value. The fol-lowing summarizes these requirements as they apply to concrete masonry construction. 5): Reinforced wall with prescriptive reinforcement of detailed plain shear wall. •Minimum thickness of 200 mm (8 in. 5 has been the highest … Continue reading →. All-In-One Sheathing Panel Insulates and Protects. or separate inspections. 10, “classic wall bracing” 4. 11 of the IBC and section R602. ABSTRACT RELIABILITY AND EFFECT OF PARTIALLY RESTRAINED WOOD SHEAR WALLS by JOHN J. INTERNATIONAL RESIDENTIAL CODE - PRESCRIPTIVE WALL BRACING SOLUTIONS L h h opening 1x4 diagonal bracing or approved metal strap device Simpson CWB, RCWB and WB/WBC. Prescriptive compliance or as part of a window schedule included in the plans for Component Performance or Systems Analysis. The prescriptive provisions for wall construction in the IRC do not require hold-downs to prevent braced wall panels from displacing or overturning under shear and uplift loads. • When wall height is less than wall length the wall is consider squat • Clause 10. 12), gives builders an affordable, streamlined approach to meeting wall bracing requirements that can be used for select single-family construction designs in certain regions. Requirement for Masonry Shear Walls Based on Shear Wall. foundation, shear wall, roof truss, retaining walls exceeding 4 feet, etc. • Shear Walls Design Examples: • 2012 IBC/IRC Recognition • 2012 WFCM Prescriptive • 2012 WFCM Engineered • 2008 SDPWS • Anatomy of a Shear Wall • Elements of a shear wall • Strength and stiffness • Detailing and limitations Outline 6 AWC Design Standards. Concrete shear walls that lack ductility may fail by crushing of their boundary elements, horizontal sliding along construction joints due to shear, or diagonal cracking caused by combined flexure and shear. 2015 WFCM Prescriptive - Segmented Shear Wall. Verify roof eave rafter tales/sheathing does not project into fire separation distance @ property line per R302. ) are fully grouted, as it is more economical to fully grout the wall than grout every other cell. prescriptive requirements for wall bracing and/or shear walls to resist the imposed lateral loads due to wind and seismic. The results will give designers and builders a better understanding of the complexity of shear wall code provisions and how to go about designing and constructing shear walls through clarifying code intent. or separate inspections. Shear Walls 29 Seismic Retrofit Training WOOD STRUCTURAL PANEL SHEAR WALLS This part of the Shear Walls section will discuss the components of wood structural shear walls, their correct installation and the effects on seismic performance when they are improperly installed. foundation, shear wall, roof truss, retaining walls exceeding 4 feet, etc. Gongkang Fu Major: Civil Engineering Degree: Doctor or Philosophy The prescriptive design of the most widely used residential building code in the United States, the IRC, allows the use of partially restrained wood shear walls to resist wind and seismic loads. ICC-ES evaluation report. Keywords: Narrow shear walls, Portal frame, Bracing units 2. Prescriptive Method for One and Two Family Design of End Posts for Diaphragm Shear Walls. 4): Reinforced wall with prescriptive reinforcement of detailed plain shear wall. The plans should include “braced wall lines,” defined as “a straight line through the building plan that represents the location of the lateral resistance provided by the wall bracing,” as well as “braced wall panels,” defined as “a full-height section of wall constructed to resist in-plane shear loads through interaction of. When performing an engineered shear wall or diaphragm analysis, the FPInnovations method cited above will provide a method of checking the opening size in relationship to the overall diaphragm size. Other propriety systems or uncommon engineering-critical solutions will also be discussed and how to approach those. Often walls that require reinforcement at 16 in. Where interior walls are shear wall panels, wall framing and sheathing shall extend to the roof sheathing. Prescriptive seismic reinforcement is sufficient for shear. A shear wall is a structural wall. North American Standard for Cold-Formed Steel Framing - Prescriptive Method for One and Two Family Dwellings, 2007 Edition with Supplement 2 (AISI-S-230-07w-S2-08). I prefer to square my walls, sheath them, and then stand them. This calculator is intended for use by experienced designers that are familiar with wall bracing. A radically different shear-wall core system for simpler and speedier construction of steel-framed high-rise office buildings is about to make its debut. Klingner 5 Example #2: Allowable-Stress Design of Reinforced Concrete Masonry Shear Wall (SI Units) Using the allowable-stress provisions of the 2005 MSJC Code (ACI 530), design the reinforced concrete masonry shear wall shown below. For wood structural panels shear walls, the term high aspect ratio is considered to apply to walls with an aspect ratio greater than 2:1. Shear Walls or Braced Wall Panels Check plans for lateral restraint or alternate braced panels per R602. With this remarkable system, erection will take an estimated 40% less time to complete than it would with a traditional cast-in-place reinforced concrete core. wide and 4 in. These schedules were calculated to provide resistance to wind uplift pressure as required by most codes. Under prescriptive design codes for conventional construction, shear walls are referred to as braced wall panels. for flexural reinforcement. For years, homes have been braced using a variety of techniques that have withstood the elements over time. Sweat Equity: Cripple walls a key part of earthquake retrofitting. Here at Civil + Structural Engineer we're passionate about being the best source of news and information for the engineering industry. Engineered approaches such as those outlined in AWC's 2015 Special Design Provisions for Wind and Seismic. Shear Walls, and Special Reinforced Concrete Shear Walls. of h ll P i ti h h thf shear walls. Shear 11-15 Prescriptive Wall Bracing 16-18 Frame Inspection 19-33 Roofing 34-36 Energy Conservation Inspection 37-41 Final Inspection 42-44 Swimming Pool 45-46 Demolition 46 PLUMBING Pages 47-72 Underground 48-51 Underfloor 52-58 Rough 59-62 Final 63-65 Tables 66-72 MECHANICAL Pages 73-97 Underfloor 77-80. Introduction. Shotcrete: Concrete that is pneumatically placed on vertical or near vertical surfaces, typically with a minimal use of forms. Windstorm OSB wall sheathing meets SSTD ICC 600 Nailing Schedule Calculator Launch the Windstorm Capacity Calculator » How a House is Developed to Resist Uplift and Shear If your structure or location does not allow the use of prescriptive methods, only a licensed professional designer, such as an architect or professional engineer, has the training. The provisions of this chapter shall con-trol the design and construction of all walls and partitions for all buildings. Wall Proportioning •ACI 318 has no prescriptive minimum thickness. The 2000 IRC Commentary notes that the foundation wall provisions are primarily for masonry and concrete basement walls. 2 Requirements. is based on a prescriptive force based design methodology. Wood structural panels with span ratings of Wall-16 or Wall-24 shall be permitted as an alternate to panels with a 24/0 span rating. Figur 6 (page 42) illustrates that a a)ntin-. The Envelope Process 7. prescriptive requirements for wall bracing and/or shear walls to resist the imposed lateral loads due to wind and seismic. Section R602. Method GB and PCP braced wall panel h/w ratio shall not exceed 1:1. Shear Wall Design Examples Several design tools and standards to assist engineers, architects, and building officials with the design of shear walls are available. ⃞⃞⃞⃞ Shear wall location. Mechanics of Multi-story Shear Walls with Force Transfer around Openings 6. Systerns 42 Shear Capacities for Sheathing Materials 276 G. deep,it can slip into a 2×6 wall in a wide bay created by removing one stud. 2-1 are permitted to be increased from 160 ft (50 m) to 240 ft (75 m) for structures assigned to Seismic Design Categories D or E and from 100 ft (30 m) to 160 ft (50. Wherever possible, the walls should be anchored as soon as possible after they have been plumbed and aligned. Part 3 introduces structural shear walls considering their form, behaviour and construction options. All seams between panels used to resist lateral loads must be backed by solid wood framing. A shear wall is a structural wall. 2-1 are permitted to be increased from 160 ft (50 m) to 240 ft (75 m) for structures assigned to Seismic Design Categories D or E and from 100 ft (30 m) to 160 ft (50. -Only special reinforced shear wall permitted -Minimum prescriptive requirements for reinforcement and connections -Type N mortar and masonry cement mortars are prohibited in the lateral force-resisting system -Non-participating walls - minimum prescriptive reinforcement Chapter 7, Seismic Design. The Mason Contractors Association of America (MCAA) is committed to preserving and promoting the masonry industry by providing continuing education, advocating fair codes and standards, fostering a safe work environment, recruiting future manpower, and marketing the benefits of masonry materials. 2) are given. 5): Reinforced wall with prescriptive reinforcement of detailed plain shear wall. • Braced Wall Panel: A full-height section of wall constructed to resist in-plane shear loads through interaction of framing members, sheathing material and anchors. There are two forces you must account for when attaching walls to the foundation or floor slab. Shear Walls Engineered solution Per IBC 2.