2025/12/15

Why not reconsider H=100mm?

Raised Access Floor

When you hear the term "Raised Access Floor," how many millimeters of height do you imagine it to be?
Most people would probably answer "H=100mm."
Raised Access Floors are said to have become common since the early Heisei period.
At the time, various wired connections were common in office equipment, resulting in a large amount of wiring, and it is thought that a certain level of floor height was necessary to accommodate them.
Another possible reason is that a number like "100" is an easy-to-understand reference value.

Is a Raised Access Floor height of 100mm really necessary?

As the seventh year of the Reiwa era draws to a close, nearly 40 years have passed since the beginning of the Heisei era.
With the advancement of various technologies, office environments and wiring conditions have changed dramatically.
In line with these changes, it may be a good time to review the height of the Raised Access Floor.

Wireless wiring is becoming the norm in offices

Past columns (What height is required for a Raised Access Floor?As mentioned in the previous article, the number of offices in the Reiwa era is increasing due to the spread of mobile phones and the adoption of free address systems and ABW.
In Reiwa era offices like this, it is thought that the amount of wiring has decreased compared to the early Heisei era.
Once a raised access floor has been installed, it is not easy to lower its height just because the amount of wiring has been reduced.
As a result, a large space remains under the floor in the Raised Access Floor, where the amount of wiring has been reduced.

If we could compress the space under the floor, what would be the benefit?

What benefits would come from compressing the space under the floor?
Regarding this point, I have written about it in a previous column (What height is required for a Raised Access Floor?,3 Benefits of Reassessing the Height of a Raised Access Floor) introduces some of them.
For rooms that already have a raised access floor, it is expected that the ceiling height will be increased and the space for attic equipment will be expanded.
For rooms currently being planned for construction, the expected benefits include reduced costs for the Raised Access Floor itself, reduced structural costs due to reduced floor height, and resource conservation (CO2 reduction).
In either case, benefits are expected to affect the entire room or the entire building.

So why not try using 40mm and 29mm from the start?

If it is difficult to change the height later, why not consider installing a low-height raised access floor from the start?
For example, the Network Floor is a low-floor Raised Access Floor with a height of 40mm and a height of 29mm.
Previous column (Have you heard of feed-in mats?As mentioned in the previous article, the use of feed-in mats makes it possible to handle large amounts of wiring, and the system has been widely adopted in offices with floors exceeding 1,000 m1.
If you switch from H=100mm, you can effectively utilize 60mm and 71mm of space per floor.
Although it is only about the height of the short side of a business card, when multiplied by the floor area it leads to effective use of a large space.
Please consider this in your next plan.

We can handle the removal and renewal of Raised Access Floors.

Although it is not an easy job, we can also handle the removal and replacement of raised access floors that have already been installed.
Please contact us if you would like to change the height of the Raised Access Floor during renovation work.