PILE: Deep foundation components including piers, caissons, and piles. PILE CAP: Foundation elements to which piles are connected including grade beams and mats. REGISTERED DESIGN PROFESSIONAL: An architect or engineer, registered or licensed to practice professional architec- ture or engineering, as defined by the statutory requirements of the professional registrations laws of the state in which the project is to be constructed. SEISMIC DESIGN CATEGORY: A classification assigned to a structure based on its Occupancy Category and the severity of the design earthquake ground motion at the site as defined in Section 11.4. SEISMIC FORCE-RESISTING SYSTEM: That part of the structural system that has been considered in the design to provide the required resistance to the seismic forces prescribed herein. SEISMIC FORCES: The assumed forces prescribed herein, related to the response of the structure to earthquake motions, to be used in the design of the structure and its components. SELF-ANCHORED TANKS OR VESSELS: Tanks or ves- sels that are stable under design overturning moment without the need for mechanical anchors to resist uplift. SHEAR PANEL: A floor, roof, or wall component sheathed to act as a shear wall or diaphragm. SITE CLASS: A classification assigned to a site based on the types of soils present and their engineering properties as defined in Chapter 20. STORAGE RACKS: Include industrial pallet racks, moveable shelf racks, and stacker racks made of cold-formed or hot-rolled structural members. Does not include other types of racks such as Minimum Design Loads for Buildings and Other Structures 111
drive-in and drive-through racks, cantilever racks, portable racks, or racks made of materials other than steel. STORY: The portion of a structure between the tops of two successive finished floor surfaces and, for the topmost story, from the top of the floor finish to the top of the roof structural element. STORY ABOVE GRADE: Any story having its finished floor surface entirely above grade, except that a story shall be consid- ered as a story above grade where the finished floor surface of the story immediately above is more than 6 ft (1,829 mm) above the grade plane, more than 6 ft (1,829 mm) above the finished ground level for more than 40 percent of the total structure perimeter, or more than 12 ft (3,658 mm) above the finished ground level at any point. STORY DRIFT: The horizontal deflection at the top of the story relative to the bottom of the story as determined in Sec- tion 12.8.6. STORY DRIFT RATIO: The story drift, as determined in Section 12.8.6, divided by the story height. STORY SHEAR: The summation of design lateral seismic forces at levels above the story under consideration. STRENGTH: Design Strength: Nominal strength multiplied by a strength reduction factor, ϕ .
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- loads, Dead and live loads, Construction terminology, Other Structures, minimum design loads