If you do not already have a suitable rack into which the equipment for your LGfL 2.0 installation can be installed, then you will need to obtain one. A choice of racks is available with common options ranging in height from 9U to 15U. All are 600mm wide and 600mm deep (external dimentions).
Note that wall fixings are NOT included with these racks. Assuming that you have solid walls, you will need to purchase M8 Rawlbolts or similar for this purpose. For other types of wall, you should seek advice about the best fixings to use before ordering them.
For details of the size of rack your school requires please consult the support site at this link.
Images shown are for a 9U rack unit.