Seismic qualification of a switch box
This supporting document details the results of a seismic analysis on a switch box assembly. The switch box is mounted to a Unistrut frame and is attached to the concrete floor in the 225B Building with Hilti Kwik bolts. The assembly was found to meet safety class 3 requirement. Although all components analyzed were found to be structurally adequate, some changes are recommended. To comply with SDC 4.2 specification, the Hilti Kwik bolts should be: placed at least 8 1/4 inches from the edge of the concrete floor; should have a minimum spacing of 8 inches from any Kwik bolt; and should be embedded 5 1/2 inches into the concrete. The minimum embedment distance is 2 3/4 inches. Furthermore, when the bolts are installed, rebar within the concrete should not be cut or damaged. Finally, the length of the Hilti Kwik bolt should be sized such that the distance from the top of the bolt to the top of the nut is not less than 2 thread pitches, and not more that 3/4 inch.
- Research Organization:
- Westinghouse Hanford Co., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-87RL10930
- OSTI ID:
- 10105536
- Report Number(s):
- WHC-SD-WM-ER-393; ON: DE95004365; BR: 35AF11201/35AF11202; TRN: AHC29503%%47
- Resource Relation:
- Other Information: PBD: 23 Nov 1994
- Country of Publication:
- United States
- Language:
- English
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