Calculation of Lateral Force Fs is the shear force on one bolt when a left-right horizontal load is applied
The lateral force acts as shear on the floor anchor fasteners and shear or tensile loading on the equipment anchor fasteners depending upon orientation. The actual reactions of the fasteners should be calculated by a qualified engineer.
Calculation of Lateral Force Lateral force on each leg is equal to FP/# of legs = FP/4
The lateral force acts as shear on the floor anchor fasteners and shear or tensile loading on the equipment anchor fasteners depending upon orientation. The actual reactions of the fasteners should be calculated by a qualified engineer.
Figure R4-1
Design Example
Calculation of Overturning Force Sum the moments of the reactions on the system about line through the legs A and B:
If 0.94h 0.85L2, then there is a tension reaction, R, at the two anchors, to resist overturning of system.
Example:
L1 = 50 inch
L2 = 20 inch
h= 36
W = 5000 lbs Lateral force = Fp/4 = 0.94(5000)/4 = 1175 WP (0.94h – 0.85L2)
Overturning force = R =_________________ (R4-4)
2L1
= 5000 (0.94(36) – 0.85(20))
_____________________ (R4-5) 2(50)
R = 842 lbs
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1 American National Standards Institute, 25 West 43rd Street, New York, NY 10036, USA; Telephone: 212.642.4900, Fax: 212.398.0023, http://www.ansi.org
2 European Committee for Standardization, Avenue Marnix 17, B-1000 Brussels; Telephone: 32.2.550.08.11, Fax: 32.2.550.08.19, http://www.cen.eu
3 Deutsches Institut für Normung e.V., Available from Beuth Verlag GmbH, Burggrafenstrasse 4-10, D-10787 Berlin, Germany; http://www.din.de
4 International Electrotechnical Commission, 3 rue de Varembé, Case Postale 131, CH-1211 Geneva 20, Switzerland; Telephone: 41.22.919.02.11, Fax: 41.22.919.03.00, http://www.iec.ch
5 Institute of Electrical and Electronics Engineers, 3 Park Avenue, 17th Floor, New York, NY 10016-5997, USA; Telephone: 212.419.7900, Fax: 212.752.4929, http://www.ieee.org
6 International Organization for Standardization, ISO Central Secretariat, 1 rue de Varembé, Case postale 56, CH-1211 Geneva 20, Switzerland; Telephone: 41.22.749.01.11, Fax: 41.22.733.34.30, http://www.iso.ch
7 National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269, USA; Telephone: 617.770.3000, Fax: 617.770.0700, http://www.nfpa.org
8 Underwriters Laboratory, 2600 N.W. Lake Road, Camas, WA 98607-8542, USA; Telephone: 877.854.3577, Fax: 360.817.6278, http://www.ul.com
9 United States Food and Drug Administration/ Center for Devices and Radiological Health (FDA/CDRH). Available from FDA/CDRH; http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm
