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Influence Area: K LL *A T

Influence Area: K LL *A T. K LL = 2. Tributary Area. Influence Area. The total area supported by all the members supported by the member in question. Determine K LL for the girder that spans from A1 to B2. Determine K LL for Girder on Grid C. Tributary Area. Influence Area. K LL = 2.

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Influence Area: K LL *A T

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  1. Influence Area: KLL*AT KLL = 2 Tributary Area Influence Area • The total area supported by all the members supported by the member in question. • Determine KLL for the girder that spans from A1 to B2.

  2. Determine KLL for Girder on Grid C Tributary Area Influence Area KLL = 2

  3. Find KLL for Column at B1 Tributary Area = 1/3 of Total Area Influence Area = the Total Area KLL = 3

  4. Find KLL for Column at A3 • AT must be determined by analytical means: AT = 130 sqft • The Influence Area is the whole system:KLL AT= 520 sqft • KLL = 4.00

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