The following words and terms shall, for the purposes of this chapter and as used elsewhere in this code, have the meaning shown herein.
ADJUSTED SHEAR RESISTANCE. In Type II shear walls, the unadjusted shear resistance multiplied by the shear resistance adjustment factors of Table 2211.3.
STEEL CONSTRUCTION, COLD-FORMED. That type of construction made up entirely or in part of steel structural members cold formed to shape from sheet or strip steel such as roof deck, floor and wall panels, studs, floor joists, roof joists and other structural elements.
STEEL JOIST. Any steel structural member of a building or structure made of hot-rolled or cold-formed solid or open-web sections, or riveted or welded bars, strip or sheet steel members, or slotted and expanded, or otherwise deformed rolled sections.
STEEL MEMBER, STRUCTURAL. Any steel structural member of a building or structure consisting of a rolled steel structural shape other than cold-formed steel, or steel joist members.
TYPE I SHEAR WALL. A wall designed to resist in-plane lateral forces that is fully sheathed and provided with hold-down anchors at each end of the wall segment. Type I walls are permitted to have openings where detailing for force transfer around the openings is provided (see Figure 2202.1).
TYPE II SHEAR WALL. A wall designed to resist in-plane lateral forces that is sheathed with wood structural panel or sheet steel that contains openings, that have not been specifically designed and detailed for force transfer around wall openings. Hold-down anchors for Type II shear walls are only required at the ends of the wall (see Figure 2202.1).
TYPE II SHEAR WALL SEGMENT. A section of shear wall with full-height sheathing and which meets the aspect ratio limits of Section 2211.3.2(3).
UNADJUSTED SHEAR RESISTANCE. In Type II walls, the unadjusted shear resistance is based on the design shear and the limitations of Section 2211.3.1.
The following symbols shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein.
|φ||=||Resistance factor (see Section 2211.2.1).|
|Ω||=||Factor of safety (see Section 2211.2.1).|
|Ωo||=||System over-strength factor (see Section 1617.6).|
|Co||=||Shear resistance adjustment factor from Table 2211.3.|
|Li||=||Sum of widths of Type II shear wall segments, feet (mm/1,000).|
|C||=||Compression chord uplift force, lbs (kN).|
|V||=||Shear force in Type II shear wall, lbs (kN).|
|H||=||The height of a shear wall measured as:|
|1.||The maximum clear height from top of foundation to bottom of diaphragm framing above; or|
|2.||The maximum clear height from top of a diaphragm to bottom of diaphragm framing above.|
|γ||=||Unit shear force, plf (kN/m).|
|w||=||The width of a shear wall or wall pier in the direction of application of force measured as the sheathed dimension of the shear wall.|