An internal shear panel for reducing the tendency of the upper portions of buildings to move relative to the foundation when lateral forces, such as those produced by winds and earthquakes, are applied to the walls. The shear panel is pre-assembled having two vertical posts and two diaphragm members
An internal shear panel for reducing the tendency of the upper portions of buildings to move relative to the foundation when lateral forces, such as those produced by winds and earthquakes, are applied to the walls. The shear panel is pre-assembled having two vertical posts and two diaphragm members interconnecting the posts. The panel also has an upper and a lower horizontal member that are connected to the posts and the diaphragm members. The lower horizontal member and the posts are configured to be attached via brackets to holdown bolts mounted in the foundation of a building and the upper horizontal member is configured to be attached to an upper plate of the wall. Hence, the shear panel can be installed by connecting the upper horizontal member to the upper portion of the wall and connecting the lower horizontal member to the holdown bolts in the foundation.
대표청구항▼
1. A pre-assembled apparatus for reducing the tendency of upper proportions of a wall to move with respect to a foundation as a result of lateral forces applied in a direction parallel to the wall, said apparatus in combination with said wall comprising: said wall, said wall having and upper plate,
1. A pre-assembled apparatus for reducing the tendency of upper proportions of a wall to move with respect to a foundation as a result of lateral forces applied in a direction parallel to the wall, said apparatus in combination with said wall comprising: said wall, said wall having and upper plate, a lower plate, and studs connecting said upper plate to said lower plate, said studs supporting said upper plate;said apparatus inserted within and connected to said wall, said apparatus comprisingtwo vertically extending posts having both an upper and a lower end and defining a front and a back side, wherein said two vertically extending posts are positioned in a pre-selected spaced relationship;a horizontally extending upper member which is connected to said upper ends of said two vertically extending posts and wherein said horizontally extending upper member is connected to an upper portion of said wall;one or more brace members that interconnect said two vertically extending posts so as to maintain said vertically extending posts in said pre-selected spaced relationship when said apparatus is installed in a wall that is under shear stress from said lateral forces; andtwo attachment points which are respectively connected to said two vertically extending posts wherein said both of said two attachment points are attached to anchor points that are in structural connection with said foundation of said building to thereby anchor said vertically extending posts to said anchor points, and wherein said apparatus is pre-assembled to allow for installation in said wall by attaching said two attachment points to said anchor points and connecting said upper member to said upper portion of said wall so that said apparatus thereby reduces the tendency of said upper portion to move relative said foundation. 2. The apparatus of claim 1, wherein said one or more brace members is comprised of one or more planar members attached to said two vertical posts. 3. The apparatus of claim 2, further comprising a lower horizontal member that is attached to said lower ends of said two vertical posts. 4. The apparatus of claim 3, wherein said apparatus reduces the tendency of an upper portion of said wall to move relative said foundation with respect to an uplift force, said uplift force on said wall occurring as a result of an overturn movement caused by said wall being exposed to said lateral forces. 5. The apparatus of claim 4, wherein said two vertical posts and said planar members are formed out of metal. 6. The apparatus of claim 5, wherein said two vertical posts are approximately 7′-8″ in height and said apparatus is less than 3 feet in width and said apparatus is adapted to reduce the tendency of said upper portion of said wall to move when said upper horizontal member of said apparatus is connected to said upper portion of said wall, said upper portion of said wall being formed with an upper plate, and when said lateral forces cause said upper plate to move, causing motion, said apparatus reduces said motion of said upper plate of said wall that is connected to said upper horizontal member to approximately 0.5″ of deflection or less from a rest position when subjected to 3,500 lb. of said lateral forces applied on said upper plate in said direction parallel to said horizontal upper member in a pseudo-cyclic shear testing. 7. An apparatus for reducing the tendency of an upper portions of a wall in a building to move with respect to a foundation as a result of lateral forces applied in a direction parallel to the wall, said apparatus in combination with said wall comprising: said wall, said wall having and upper plate, a lower plate, and studs connecting said upper plate to said lower plate, said studs supporting said upper plate;said apparatus inserted within and connected to said wall, said apparatus comprisingtwo vertically extending posts having both an upper end and a lower end and defining a front and back side, wherein said two vertically extending posts are positioned in a preselected spaced relationship;at least one panel member interconnecting said two vertically extending posts substantially along the entire length of said posts;two holdown bolts that are anchored in said foundation of said building; andtwo attachment points which are respectively connected to said lower ends of said vertically extending posts wherein said both of said two attachments points are respectively in connection with said two holdown bolts, and wherein said apparatus is connected to said wall by said two attachment points in connection with said holdown bolts and said upper end of said vertical posts attached to said upper portions of said wall so that said apparatus thereby reduces the tendency of said upper portions of said wall to move relative said foundation as a result of shear stress by transmitting said shear stress from said upper portions of said wall through said vertical members and said at least one panel member to said anchor points and said holdown bolts positioned in said foundation, and wherein said posts and said panel of said apparatus for reducing the tendency of said wall to move are separate members from said studs, said upper plate and said lower plate of said wall. 8. The apparatus of claim 7, further comprising; an upper horizontal member that interconnects said upper portions of said two vertical posts, wherein connection between said upper portions of said vertical posts is achieved by connecting said upper horizontal member to said upper portions of said vertical posts; anda lower horizontal member that interconnects said lower portions of said two vertical posts, and wherein said upper horizontal and said lower horizontal members are separate members from said upper plate and said lower plate of said wall. 9. The apparatus of claim 7, further comprising shear bolts mounted in said foundation and wherein said lower horizontal member is attached to said shear bolts mounted in said foundation to thereby reduce the likelihood of a lower portion of said apparatus becoming dislodged from said foundation in response to lateral forces applied to said wall. 10. The apparatus of claim 7, wherein said panel of the apparatus is not directly connected to any of the studs, the upper plate or the lower plate of said wall. 11. The apparatus of claim 7, wherein said apparatus connects to said upper plate of said wall. 12. The apparatus of claim 8, wherein said panel does not extend beyond said upper horizontal member of said apparatus. 13. A method of building a wall so that the tendency of an upper portion of a wall having an upper plate to move relative a lower portion of said wall is reduced when said wall is submitted to a lateral force, said method comprising the steps of: providing a foundation for said wall, wherein one or more holdown bolts are each installed in said foundation at a pre-selected location in said foundation;mounting two or more studs so as to extend substantially vertically upward from said foundation;positioning an upper plate on a top surface of said two or more studs;making a structural connection of a sheer reduction panel to said holdown bolts and positioning said shear reduction panel so that said panel is positioned between said two studs, said shear reduction panel being pre-assembled to have two vertical posts, an upper horizontal member and a lower horizontal member connecting said two vertical posts, and one or more brace members that interconnect said two vertically extending posts so as to maintain said vertically extending posts in said pre-selected spaced relationship when said apparatus is installed in a wall that is under shear stress from said lateral forces; andattaching an upper portion of said shear reduction panel to said upper plate of said wall so that movement of said upper plate of said wall in response to lateral forces applied to said upper plate of said wall in response to lateral forces applied to said wall is reduced as a result of the lateral forces being transmitted through the vertical posts and the interconnecting panel to the holdown bolts mounted in the foundation. 14. The apparatus of claim 13, wherein said one or more brace members is comprised of one or more planar members attached to said two vertical posts. 15. The method of claim 13, wherein said the brace member does not extend beyond said upper horizontal member of said apparatus.
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