If the perforated tiles cannot accommodate this load, you would have to temporarily replace them with solid tiles. Since it is possible that you might use your cool aisle to also serve as an aisle to move equipment, the perforated tiles will need to support the weight of two-point loads of a rack as they are rolled along the aisle. The rolling load should be close to the static load and is usually only applicable to perforated tiles. The tile must be rated for at least an 800-pound static load. If you have two racks, each with a 400-pound point load, and each rack has one caster on a tile, this tile will have an 800-pound static load. The static load is the additive point load on a tile. A floor tile must have a higher than 550- pound point load, which means that a 1-inch square of the tile must be able to support 550 pounds without deflection of more than 2 mm. For example, a Sun Fire 15K server rack is 2200 pounds with four casters, so the load distribution is 550 pounds per caster. The point load is the weight of a rack on any one of these four points. Here are the three types of loads to consider: However, it’s a concern for facilities with raised floors and structural ramps. Levelness & Load Capacityįor poured concrete, load capacity will not be an issue. With a 56% open grate tile, the difference is even more dramatic – 2,096 cfm with no damper and only 1,128 cfm with a fully open damper. That’s the equivalent of only 17.4% open. Simply adding a damper and leaving it fully open reduces this to 515 cfm. Therefore, proving a raised floor design is not fit to accommodate higher-density rack deployment ( 8kW–10kW per rack and up).Ī 25% open perforated panel with no damper will pass 746 cfm of air at 0.1 inches of static pressure under the floor. The space under the raised floor is used for cabling which becomes an obstruction for air cooling. Some buildings also do not have the slab-to-slab clearance for the height requirements of raised floor type data center. Uneven air pressure and spotty air delivery are commonly caused by air turbulence. Regardless of the many advantages of raised floors, still accounts for many data center cooling problems. Raised floors also offer more room for cabling which eliminates the additional manpower and infrastructure that overhead requires. The delivery of chilled air under a raised floor is easier because arranging the perforated floor tiles is all that is required to change the air distribution. Overhead air ducts for cold air distribution tend to be limited. In this article, we are going to address the considerations when choosing and installing a raised floor in your data center facility. However, no matter what the current trend is, it is undeniable that raised access flooring is still present in many data centers. The idea of raised floors in data centers was fashionable, but it seems that it is not necessary for data center design today. Vaccine Transport and Storage Monitoring.