NEC EXPRESS800 - Manual (Page 24)

2-8 Planning Your Site
Figure 2-2. Distance Between Stabilizer Anchors
If the rack is installed on a concrete floor, you can bolt the rack to the floor
using 3/8" concrete drop-in anchors and 1½"-16 bolts.
If you are installing your rack in an area with a raised floor, you can use
concrete drop-in anchors and 3/8"-16 threaded rod with washers and nuts to
secure the rack to the concrete beneath the raised floor. See Figure 2-3.
Figure 2-3. Raised Floor Installation
When you are installing your system on a wooden floor, you can use 1-3/4" 3/8"
- 16 lag bolts as shown in Figure 2-4.
Figure 2-4. Wooden Floor Installation