Buying Tips | Raised Access Floors

Choosing the right Raised Access Floor system is just as important as the servers, other equipment and the power and environmental equipment that resides on top of the floor&#;s surface.

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Key considerations:

• Know the concentrated load ratings - Floor tiles come in various weight capacities, and weight-bearing requirements that  are key in the selection process. Most applications require either # or # concentrated load rating, but  # to # can be ordered when required
• Finish & Materials - Choose a tile with one of the industry&#;s standard color and patterns for easy tile replacement in heavy traffic areas that will show wear and tear first. Data Center floor systems need to have a surface that is conductive of static dissipation, to prevent the buildup of static electricity. Panel weights vary between the  concrete filled, wood core and hollow steel construction that is offered and most popular today. Stainless Steel, Aluminum and Blank Surface Panels are available for special applications
• Understructure - Most floor systems require rigid grid support system when the finished floor height is 12&#; or greater. Screw down stringer systems provide the best lateral and horizontal support system, and minimizes panel shifting and floor collapsing, during the movement of heavy rolling loads in and out of  the room.
• Cooling &#; Down Flow AC-By maximizing the available space underneath the floor, you can increase your overall cooling efficiency. This can be done by proper layout of  cabling from the CRAC and PDU/RPP unit locations. Proper cooling of the higher BTU&#;s present in current high density  server racking of 42U and larger,  can be obtained utilizing the  65% open air cooling panels.
• Ramps/Railing Systems - Critical for movement of equipment onto raised access flooring if finished floor height exceed 6&#;. Ramping can be constructed at any width  and should comply with local and ADA codes. Standard slope is 1:12 and ramping requires sloped hand rail(s), and 36&#; minimum height guard railing if sides of ramp are open to finished floor.
• Floor Cutouts - If a down flow AC system is being used for cooling, it is best to use a brushed grommet product which will seal an opening which will prevent contamination and ensures that every cable opening is sealed. This eliminates lost cooling and helps in maintaining static air pressure from the CRAC unit. The ultimate goal is to provide the most reliable and efficient environment, the highest possible power density and more important, reducing operating cost.

KEY TERMS:

• Floor Panel
  The material that makes up the surface of a raised access floor system. Construction of: Steel, steel with concrete filling, steel with wood core, cast aluminum or stainless steel
• Concentrated Load Rating (Also referred to as: STATIC LOAD)
  Ratings specified in pounds force applied over a one square inch area
• Bypass Airflow
  Conditioned air that does not reach computer equipment. Unintended bypass airflow can occur by escaping through cable cut-outs, holes in panels and under cabinets, misplaced perforated tiles and perimeter walls.
• Directional Airflow
  Airflow panels such as perforated and cooling grates that deliver air directly to the face of the server racking.
• Rolling Load
  Dynamic (varying) loads that are usually created by moving equipment on caster or wheels over the raised access floor system.

The structural strength of stainless steel lends itself to many different applications. Consequently, the benefits of choosing stainless steel flooring are something every business should consider.

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Stainless steel is a low-carbon alloy composed of chromium, making up 10% of its weight, and a range of other metals including nickel, iron, manganese and copper. Stainless steel has over 300 grades, all for different uses. Flooring grades are 304 and 316, with grade 304 being the most common type of stainless steel with an 18-20% chromium content.

If you're considering new flooring in your building, read on to discover the benefits of stainless steel flooring sheets.

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