Document: NRC Regulatory Guide
Document ID: fcaa3426-5268-4adb-a83c-69e7f50d6d6b
Document Type: regulatory_guide
Title: Anchoring Components and Structural Supports in Concrete (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1725/ML17258A579.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.199
CFR Part: 
CFR Title: 

Content:
llation specifications in order to maintain structural bolting integrity (Ref. 11). 1.2 Loads and Load Combinations The loads and load combinations provided in Regulatory Positions 3 and 4 of RG 1.142 should be used. Loads and forces on embedments should be evaluated to account for baseplate flexibility and eccentricity of connections and the dynamic (strain rate and low-cycle fatigue) effects of loads and forces. 1.3 Design requirements Design requirements should follow the provisions in Sections D.3–D.11 of ACI 349-13, with load factors and strength reduction factors consistent with the loads and load combinations in Regulatory Position C.1.2. 1.4 Installation In addition to the provision in Section D.9 of ACI 349-13, “Installation of Anchors,” the following should be considered in the installation of anchor bolts: DG-1284, Page 6 a. Installers should have the training and qualifications specified by the licensed design professional and anchor manufacturer. b. Installation standards are consistent with accepted industry-specified tolerances. c. Proper anchor type, grade, and material are used. d. Embedment depth is proper. e. Edge distance and spacing of anchors are to specified values. f. Anchor is threaded properly. g. Plate thickness meets specified size and thickness values. h. Plate bolt-hole size is within established limits. i. Correct bolt diameter and length are used. j. Concrete has the specified full design strength. k. Concrete is sound (free of voids). l. Grout has been mixed and installed to specifications. The following additional checks specifically for the installation of post-installed anchors should be considered: a. Location of anchors avoids conflicts with existing embedments such as reinforcing steel. b. Hole diameter in concrete is correct. c. Drill hole angularity in concrete is within established limits. d. Bolt hole has been cleared of drill dust. e. Anchor has been correctly preloaded. 2. Inspection Licensees and applicants should