Document: NRC Regulatory Guide
Document ID: a03860d0-46a2-4c53-b0e5-9398a146bf12
Document Type: regulatory_guide
Title: Safety-Related Steel Structures and Steel-Plate Composite
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2033/ML20339A558.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.243
CFR Part: 
CFR Title: 

Content:
ational methods or pertinent test data. 11.1.10. Evaluation of loads from malevolent, beyond-design-basis, aircraft impacts are within the scope of RG 1.217 and are outside the scope of this RG. 11.2. ANSI/AISC N690-8, Appendix N9, Section N9.2.5—Determination of Required Strengths Section N9.2.5 specifies that the required strength for each member load type may be determined by averaging the demand over areal extents of the wall (referred to as “panel sections”) that are less than or equal to twice the wall thickness in length and width, except at connections and openings, where the panel section dimensions are limited to the wall thickness. These averaging guidelines are generic and may not be suitable in all cases. The implementation of these guidelines or any alternate averaging methodology will be subject to case-specific review by the NRC staff. 11.3. ANSI/AISC N690-8, Appendix N9, Section N9.3.2—Compressive Strength Equation A-N9-16, provided for calculating the compressive strength of SC walls, should be used for surface temperatures up to 300 degrees Fahrenheit (150 degrees Celsius), consistent with the recommendation made in Section N9.3.2 of the commentary. For temperatures above this threshold, the basis for the analytical approach should be demonstrated. 11.4. ANSI/AISC N690-8, Appendix N9, Section N9.3.5—Out-of-Plane Shear Strength The term tensile strength, Ft, to be used in Equation A-N9-23, should be determined in accordance with Chapter D of AISC 360-16. 11.5. ANSI/AISC N690-18, Appendix N9, Section N9.3—Design of SC Walls Appendix N9 does not include design provisions for attachments to SC walls. The design of the SC walls should consider the need for localized strengthening of the SC wall steel module or additional anchorage, or both, to be installed before pouring concrete to provide adequate support for large, heavy attachments. In addition, loads from smaller attachments mounted directly to the faceplates after construction of the