|Costs of strengthen
Typical causes of damages
Access floors (raised floor) may collapse if not adequately braced and anchored.
Raised floors are also found in control rooms in electric power, water, gas, and transportation facilities, and in banks and insurance companies. The rapid expansion of Internet services accelerated the use of raised floors.
Raised floors must be capable of withstanding lateral loads. Equipment supported on the raised floors must have some lateral restraint between the equipment and the raised floor. Heavy equipment must be supported directly from the building floor. Some methods of restraining equipment on the raised floor allow for some lateral movement, so that equipment must be prevented from hitting each other or structural elements such as walls and columns.
For high and moderate earthquake zones, the raised floor with the diagonal bracing is generally adequate for an office environment with lightweight equipment, such as desks, office partitions, printers and copiers. A more rigid system is required when the floor is used for critical equipment or in critical facilities. The number of diagonal braces should be one floor tile length around the perimeter of the equipment footprint. Bolt pedestal bases to concrete slab.