Raised floor Earthquake Kit

The Earthquake Kit for the 3931 on a raised floor is a system of adjustable turnbuckles intended to fasten each corner of the server frames to eyebolts installed in the concrete floor beneath your computer room raised floor. FC 8014 supplies parts to cover raised floor heights from 241.3 mm to 1320.8 mm (9.5 in - 52 in).

Measure the height from the concrete floor to the top of the raised floor as indicated in Figure 1.
Figure 1. Turnbuckle assembly
Turnbuckle assemblies
Use the raised floor height (specified as 'H') and Table 1 to determine the specific hardware that you need to select from the Earthquake Kit.
Table 1. Configuration table
Raised floor height 'H' Toggle block Coupler nut Threaded rod length 'A' Threaded rod length 'B'
9.5'' to 13'' Short No 12'' -
13'' to 17.5'' Long No 12'' -
17.5'' to 25.5'' Long No 20'' -
21.5'' to 29.5'' Long No 24'' -
29.5'' to 37.5'' Long Yes 12'' 20''
33.5'' to 41.5'' Long No 36'' -
41.5'' to 49.5'' Long Yes 20'' 24''
45.5'' to 52'' Long Yes 12'' 36''
Important: Make a note of the measurement information and hardware selection, as it will be needed later in the server installation.

You are responsible for obtaining the services of a qualified consultant or structural engineer to determine what must be done at your particular location to install four eyebolts. These eyebolts should be capable of withstanding the appropriate seismic forces for a frame weighing up to 1308 kg (2885 lbs) with the center of gravity 1270 mm (50 inches) from the bottoms of the frame casters and at the center of the frame.