# 6-A-6 Complete Structural Damage

Building-specific damage parameters of interest include the median spectral displacement of the Complete Structural Damage state, *S _{dC}*, and the associated lognormal standard deviation (Beta) factor, β

*. Values of β*

_{C}*are given in Table A6-11. Median spectral displacement at the Complete Structural Damage state,*

_{C}*S*, is calculated using Equation (A6-6):

_{dC}where:

*Δ _{C}* = interstory drift ratio (of the story with maximum drift) at the threshold of Complete Structural Damage — values of

*Δ*are given in Table A6-9,

_{C}*H _{R}* = height of building at the roof level, in inches — default values of

*H*are given in Table A6-3 as a function of the number of stories above grade,

_{R}α_{2} = modal height factor, Alpha 2 — values of α_{2} are given in Table A6-4, and

α_{3} = modal shape factor, Alpha 3, relating maximum-story drift and roof drift, values of α_{3} are given in Table A6-10.

### Related Code Sections

*damage*parameters of interest include the median spectral displacement of the

*Complete*

*Structural*

*Damage*state, S dC ...

*damage*parameters of interest include the median spectral displacement of the

*Complete*

*Structural*

*Damage*state, S dC ...

*Complete*

*Structural*

*Damage*state, STR 5 , are given in Table A6-12. TABLE A6-1— SIGNIFICANT

*STRUCTURAL*DEFICIENCY MATRIX ...

*Complete*

*Structural*

*Damage*state, STR 5 , are given in Table A6-12. TABLE A6-1—SIGNIFICANT

*STRUCTURAL*DEFICIENCY MATRIX ...

*COMPLETE*

*STRUCTURAL*

*DAMAGE*means a significant portion of the

*structural*elements have exceeded their ultimate capacities for some critical ...