Document: NUREG-0800
Document ID: 786da65a-4915-4af3-afb3-678b7df5bea7
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070327.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
tural acceptance criteria of subsection I.5 of this SRP section should be satisfied first without the tornado missile load in (b) and without Y , Y , and Y in (d) and (e). When considering these r j m concentrated loads, local section strength capacities may be exceeded provided there will be no loss of function of any safety-related system. Where any load reduces the effects of other loads, the corresponding coefficient for that load should be taken as 0.9 if it can be demonstrated that the load is always present or occurs simultaneously with other loads. Otherwise the coefficient for that load should be taken as zero. Where the structural effects of differential settlement, creep, or shrinkage may be significant, they should be included with the dead load, D, as applicable. c. Load Combinations for Steel Structures For steel interior structures, the load combinations are acceptable if found in accordance with the following: (i) For service load conditions, either the elastic working stress design methods of Part 1 of the AISC specificationsSection Q1 of ANSI/AISC N690-1984, supplemented by Appendix F to this SRP section, or the 50 plastic design methods of Part 2 of the AISC Section Q2 of ANSI/AISC N690-1984, supplemented by Appendix F to this SRP section, may be 51 used. (a) If the elastic working stress design methods are used, the following load combinations should be considered: (1) D + L (2) D + L + E (3) D + L + W 3.8.4-13 DRAFT Rev. 2 - April 1996 If thermal stresses due to T and R are present, the following 0 0 combinations should be also be considered: (4) D + L + T + R 0 0 (5) D + L + T + R + E 0 0 (6) D + L + T + R + W 0 0 (b) If plastic design methods are used, the following load combinations should be considered: (1) 1.7 D + 1.7 L (2) 1.7 D + 1.7 L + 1.7 E (3) 1.7 D + 1.7 L + 1.7 W If thermal stresses due to T and R are present, the following 0 0 combinations should also be considered: (4) 1.3 (D + L + T + R ) 0 0 (5) 1.3(D + L + E + T + R ) 0 0 (6)