ANSI SDPWS-2015 pdf free download

ANSI SDPWS-2015 pdf free download.SDPWS Special Design Provisions for Wind & Seismic with Commentary.
2.1.1 Scope The provisions of this document cover materials, design and construction of wood members, fasteners, and assemblies to resist wind and seismic forces. 2.1.2 Design Methods Engineered design of wood structures to resist wind and seismic forces shall be by one of the methods de- scribed in 2.1.2.1 and 2.1.2.2. Exception: Wood structures shall be permit- ted to be constructed in accordance with pre- scriptive provisions permitted by the authority having jurisdiction. 2.1.2.1 Allowable Stress Design: Allowable stress design (ASD) shall be in accordance with the Na- tional Design Specification ® (NDS ® ) for Wood Con- struction (ANSI/AWC NDS) and provisions of this document. 2.1.2.2 Strength Design: Load and resistance factor design (LRFD) of wood structures shall be in accord- ance with the National Design Specification (NDS) for Wood Construction (ANSI/AWC NDS) and provisions of this document. 2.1.3 Sizes Wood product sizes are stated in terms of standard nominal, standard net, or special sizes. For wood struc- tural panels produced in accordance with PS 1 or PS 2, use of the term “nominal panel thickness” in this stand- ard refers to the “Performance Category” value for these products. 2.2 Terminology ALLOWABLE STRESS DESIGN. A method of pro- portioning structural members and their connections such that stresses do not exceed specified allowable stresses when the structure is subjected to appropriate load combinations (also called working stress design). ASD REDUCTION FACTOR. A factor to reduce nominal strength to an allowable stress design level. BOUNDARY ELEMENT. Diaphragm and shear wall boundary members to which sheathing transfers forces. Boundary elements include chords and collectors at diaphragm and shear wall perimeters, interior openings, discontinuities, and re-entrant corners. CHORD. A boundary element perpendicular to the applied load that resists axial stresses due to the in- duced moment. COLLECTOR.
DIAPHRAGM. A roof, floor, or other membrane bracing system acting to transmit lateral forces to the vertical resisting elements. When the term “dia- phragm” is used, it includes horizontal bracing systems. DIAPHRAGM, BLOCKED. A diaphragm in which all adjacent panel edges are fastened to either common framing members or common blocking. DIAPHRAGM BOUNDARY. A location where shear is transferred into or out of the diaphragm sheathing. Transfer is either to a boundary element or to another force-resisting element. DIAPHRAGM, UNBLOCKED. A diaphragm that has fasteners at boundaries and supporting members only. Blocking between supporting structural members at panel edges is not included. FIBERBOARD. A fibrous, homogeneous panel made from lignocellulosic fibers (usually wood or cane) and having a density of less than 31 pounds per cubic foot but more than 10 pounds per cubic foot.
HARDBOARD. A fibrous-felted, homogeneous panel made from lignocellulosic fibers consolidated under heat and pressure in a hot press to a density not less than 31 pounds per cubic foot. LATERAL STIFFNESS. The inverse of the defor- mation of shear walls under an applied unit load, or the force required to deform a shear wall a unit distance. LOAD AND RESISTANCE FACTOR DESIGN (LRFD). A method of proportioning structural mem- bers and their connections using load and resistance factors such that no applicable limit state is reached when the structure is subjected to appropriate load combinations. NOMINAL STRENGTH. Strength of a member, cross section, or connection before application of any strength reduction factors. OPEN FRONT STRUCTURE. A structure in which any diaphragm edge cantilevers beyond vertical ele- ments of the lateral force-resisting system. ORIENTED STRAND BOARD. A mat-formed wood structural panel product composed of thin rectangular wood strands or wafers arranged in oriented layers and bonded with waterproof adhesive. PARTICLEBOARD. A generic term for a panel pri- marily composed of cellulosic materials (usually wood), generally in the form of discrete pieces or parti- cles, as distinguished from fibers. The cellulosic mate- rial is combined with synthetic resin or other suitable bonding system by a process in which the interparticle bond is created by the bonding system under heat and pressure.