Document: NUREG-0800
Document ID: 9687ba4a-508e-4167-9d91-a1bb9873aaef
Document Type: srp
Title: through 3.5.3.3 for earth retaining walls).
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1006/ML100630323.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.3.1
CFR Part: 
CFR Title: 

Content:
e design and construction of safety-related concrete masonry walls should conform to the applicable requirements contained in Uniform Building CodeC1979, unless the provisions to this criteria specify otherwise. The use of other industrial codes, such as ACI 531, ATC 3-06, or NCMA, is also acceptable. However, when the provisions of these codes are less conservative than the corresponding provisions of these criteria, their use should be justified on a case-by-case basis. The reviewer will evaluate the use of new or updated design standards such as ACI 530 and the International Building Code (IBC) on a case-by-case basis to assure that they achieve the same level of safety as the above-referenced standards. No unreinforced masonry walls will be permitted in new construction. 2. Loads and Load Combinations The loads and load combinations should include consideration of normal loads, severe environmental loads, extreme environmental loads, and abnormal loads. The following load combinations should apply (for definition of load terms, see SRP Section 3.8.4, Subsection II.3). A. Service Load Conditions (1) D + L (2) D + L + E (3) D + L + W If thermal stresses from T0 and R0 exist, they should be included in the above combinations, as follows: (1a) D + L + T0 + R0 (1b) D + L + T0 + R0 + E (1c) D + L + T0 + R0 + W Check load combination for controlling condition for maximum L and for no L. 3.8.4-22 Revision 3 – May 2010 B. Extreme Environmental, Abnormal, Abnormal/Severe Environmental, and Abnormal/Extreme Environmental Conditions (4) D + L + T0 + R0 + E' (5) D + L + T0 + R0 + Wt (6) D + L + Ta + Ra + 1.5 Pa (7) D + L + Ta + Ra + 1.25 Pa + 1.0 (Yr + Yj + Ym) + 1.25 E (8) D + L + Ta + Ra + 1.0 Pa + 1.0 (Yr + Yj + Ym) + 1.0 E' In combinations (6), (7), and (8), the maximum values of Pa, Ta, Ra, Yr, Yj, and Ym, including an appropriate dynamic load factor, should be used unless a time-history analysis is performed to justify otherwise. Combinations (5), (7), and (8) and