A moment resisting strap connection in a shear-resisting assembly for use in light frame building construction, particularly in shear walls, attached to a foundation. The improvement includes providing an elongated thin metal strap attached to a wood structural member such that the strap and wood structural member conjointly act compositely and transmit substantial shear and moment forces from the elongated structural member to the foundation. Further enhanced transfer of shear and moment forces from the wood structural member to the foundation is effected by providing sufficient fasteners such as screws between the strap, a holdown, and the wood structural member to stitch the elements together so as to stiffen them and thereby prevent bending of the end of the holdown.
A connector for attaching walls to beams or trusses that are offset from the wall and act as collectors in the lateral force resisting system. The main purpose of a drag strut connector is to connect a beam or truss to the top plate of a colinear bearing wall, thereby completing the load path and allowing loads to be transferred out of the roof or floor sheathing into the wall system where the shearwalls are. Such a beam or truss is referred to as a load âcollectorâ or âdrag strutâ. The key to this connection is that it uses self-drilling screws to create a superior connection to that achieved with a similar connector and bolts.
A wall either wholly or partially made from a shear-resisting assembly that has a shear transfer device, or plate, disposed between the bottom strut and the underlying foundation. The shear transfer device joins the two anchor bolts, eliminating intermediate foundation bolts by transferring lateral shear loads to the anchor bolts in combination with the bottom strut.
A connection between a wall stud or post and an anchor bolt embedded in a concrete foundation, using a holdown connector that attaches to the anchor bolt and supports the wall stud or post above it. The holdown connector has a tapered bottom that allows it to rotate laterally, allowing the connection to act more purely in tension than is possible with a rigid connection.
Screw Fastener In Multiple Floor Truss And Wood-To-Wood Shear Connection
Mark G. Crawford - Visalia CA, US Steven E. Pryor - Dublin CA, US Alfred D. Commins - Friday Harbor WA, US
Assignee:
Simpson Strong-Tie Company, Inc. - Pleasanton CA
International Classification:
E04C 3/02
US Classification:
52690, 52639, 411424
Abstract:
Screw fasteners are used to connect multiple trusses in side-by-side relationship. The screw fasteners join truss wood members which are in edge to edge relationship with the screws being driven through the edge of each wood member. The screws may be knurled screws as described in U. S. Pat. No. 6,109,850; lag screws, or standard screws. The connection may also join wood board members in edge-to-edge relationship when bending of the wood members is limited by a restraining structure.
A tension connection for a building includes a first tension member, the first tension member being anchored at its distal end, a second tension member being anchored at its distal end; the first and second tension members being disposed in close proximity and connected by a coupler having a surrounding sleeve and a central bore with a thread, the coupler also being formed with a first rotational member being received in the central bore of the surrounding sleeve and operatively connected to the surrounding sleeve; the first rotational member is connected to the surrounding sleeve, such that the rotational member can rotate in relation to the surrounding sleeve. A torsion spring connects the first rotational member and the surrounding sleeve; the torsion spring biasing the first rotational member and the surrounding sleeve in opposite rotational directions such that the first rotational member can be drawn into the surrounding sleeve.
Steven E. Pryor - Dublin CA, US Guy T. Anderson - Valley Springs CA, US
Assignee:
Simpson Strong-Tie Co., Inc. - Pleasanton CA
International Classification:
E04B 1/98
US Classification:
521673, 521674, 521676, 521678, 52295
Abstract:
A lateral bracing system having high initial stiffness and including yield links capable of effectively dissipating stresses generated within the lateral bracing system under lateral loads.
Badri Hiriyur - Mountain House CA, US Steven E. Pryor - Dublin CA, US
Assignee:
Simpson Strong-Tie Company, Inc. - Pleasanton CA
International Classification:
E04B 1/98
US Classification:
521673, 526551, 526569, 52657, 403 2
Abstract:
A lateral bracing system is disclosed for affixing a column to a beam in a construction. The lateral bracing system includes a pair of buckling restraint blocks, one each affixed to a top and bottom flange of a beam. Each buckling restraint block includes one or more bores formed through a center of the block. The lateral bracing system further includes at least one yield link for each buckling restraint block. Each yield link includes a first end affixed to the column, and a second end fit through a bore in a buckling restraint block and affixed to an end of the buckling restraint block.