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Section 1614 Structural Integrity Definitions
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The following words and terms shall, for the purposes of this section, have the meanings shown herein.
ALTERNATE LOAD PATH. A secondary or redundant load path capable of transferring the load from one structural element to other structural elements.
ALTERNATE LOAD PATH METHOD. A design approach that accounts for an extreme event by providing alternate load paths for elements that are no longer able to carry load. In an alternate load path design, key elements are considered notionally removed, one at a time, and the structure is designed to transfer the loads from the removed element to other structural elements, as required by Section 1616.
ASPECT RATIO. The height of any portion of a building divided by its least dimension at the elevation from which the height is being measured.
COLLAPSE. Failure of a structural element to the extent that it can no longer support any load.
ELEMENT. A structural member or structural assembly.
KEY ELEMENT. An element of the structural system, including its connections, that meets one or more of the following criteria:
RESPONSE RATIO. The ratio of an ultimate response quantity (e.g., deflection) to its value at yield.
ROTATION. The angle, measured at the ends of a member, whose tangent is equal to the deflection of the member at midspan divided by half the length of the member.
SPECIFIC LOCAL LOAD. A load applied to a structural element or structural system as specified in Section 1616.7.
SPECIFIC LOCAL RESISTANCE METHOD. A design approach that accounts for extreme event loads by providing sufficient strength for elements that may fail. In a specific local resistance design, key elements are designed for specific local loads as required by Section 1616.
ALTERNATE LOAD PATH. A secondary or redundant load path capable of transferring the load from one structural element to other structural elements.
ALTERNATE LOAD PATH METHOD. A design approach that accounts for an extreme event by providing alternate load paths for elements that are no longer able to carry load. In an alternate load path design, key elements are considered notionally removed, one at a time, and the structure is designed to transfer the loads from the removed element to other structural elements, as required by Section 1616.
ASPECT RATIO. The height of any portion of a building divided by its least dimension at the elevation from which the height is being measured.
COLLAPSE. Failure of a structural element to the extent that it can no longer support any load.
ELEMENT. A structural member or structural assembly.
KEY ELEMENT. An element of the structural system, including its connections, that meets one or more of the following criteria:
- An element which when lost, results in more than local collapse.
- An element that braces a key element, the failure of which results in failure of the key element (further secondary elements need not be considered key elements).
- An element whose tributary area exceeds 3,000 square feet (279 m2) on a single level.
RESPONSE RATIO. The ratio of an ultimate response quantity (e.g., deflection) to its value at yield.
ROTATION. The angle, measured at the ends of a member, whose tangent is equal to the deflection of the member at midspan divided by half the length of the member.
SPECIFIC LOCAL LOAD. A load applied to a structural element or structural system as specified in Section 1616.7.
SPECIFIC LOCAL RESISTANCE METHOD. A design approach that accounts for extreme event loads by providing sufficient strength for elements that may fail. In a specific local resistance design, key elements are designed for specific local loads as required by Section 1616.
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