Document: NRC Regulatory Guide
Document ID: 0983c879-43f8-412c-9dbd-bbadabdfe3f3
Document Type: regulatory_guide
Title: Mechanical (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1306/ML13064A126.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.10
CFR Part: 
CFR Title: 

Content:
b. should then be followed. Production splice samples should not be cut from the structure where the mechanical splicing sleeve is shop welded to an anchorage in a region of high stress concentration, and/or at a leak-tight barrier (e.g., embedded structural steel sections or liner plate). Representative sister splice samples should be used in such cases. Splice samples should be subjected to tensile tests in accordance with, the sampling frequency specified in paragraph 4a. or paragraph 4b. below, to determine conformance with the following acceptance standards: a. The tensile strength of each sample tested should equal or exceed 125 percent of the minimum yield strength specified in the ASTM Standard appropriate for the grade of reinforcing bar using loading rates set forth in ASTM A 370-68, "Standard Methods and Definitions for Mechanical Testing of Steel Products."3 b. The average tensile strength of each group of 15 consecutive samples should equal or exceed the guaranteed ultimate tensile strength specified for the reinforcing bar. If any sample tested fails to meet the provisions of paragraph 3a. above, the procedure of paragraph 5a. below should be followed. If the average tensile strength of the 15 samples tested fails to meet the provisions of paragraph 3b. above, the procedure of paragraph 5b. below should be followed. The locations of all reinforcing bar splices, including replacements for production test samples of mechanical splices should be shown on the as-built drawings which are kept for the plant lifetime. For one year after the commencement of commercial operation, additional records should be kept of all splice samples tested, showing the splice location and identification number, as well as whether the tested splice was a production or sister splice. 4. Tensile Test Frequency: Separate test cycles should be established for mechanical splices in horizontal, vertical, and diagonal bars, for each bar size, and for each splicing crew as follows: a.