HP LH4r HP Netserver LH 4 User Guide - Page 56
Installing Bar Nuts
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Chapter 8 Installing the NetServer in an HP Rack System/E or Rack System/U Installing Bar Nuts The "bar nut" is a two-hole metal bar used to secure the mounting flanges of the slide to the rack columns. All four mounting brackets on the slides attach behind the outside faces of the columns, using bar nuts. Use the template (or if you no longer have it, count) and mark the 20th and 22nd holes up from base line on each column. These holes correspond to the bottom hole of the eighth EIA unit (and the middle hole of the 7th EIA unit) above base line (see Figure 8-4). Figure 8-4. Marking the Rack Columns for Bar Nuts The bar nut is placed behind the outside face of the column, at the correct height as determined with the template, or by counting. Two screws are inserted through the correct holes on the front columns. Start (but do not tighten) both screws in the bar nut (see Figure 8-5). 50