What You'll Need
Replacement raised flooring frames
Replacement raised flooring pedestals
Replacement raised flooring panels (optional)
Screwdriver
Spanner
Measuring Tape
Cleaning Solution
Step 1 - Removing the Raised Flooring Panel
The first thing that you should do is remove the raised flooring panels from the affected area. You can't only remove the panel which is affected because you will need access around the entire frame. Remove the square of panels so that you can access the area needed.
Step 2 - Assessing the Situation
Once the area is uncovered, take a look at the problem, there are a few other problems which can result in similar symptoms to a broken pedestal, including a break in the frame itself.
Step 3 - Removing the Damaged Frame
Remove the damaged frame from the floor. Depending on the floor you are using, you will either need to unscrew the frame, or alternatively it might just lift out. Normally you will need to unbolt the frame before it can be removed. Once it is removed take a look at it again to ensure that the problem is actually caused by a damaged pedestal.
Step 4 - Repairing the Frame
Depending on the type of floor frames that you used, you might be able to repair the frame by screwing in new pedestals. However most frames are welded together which doesn't make this a sensible option for most people. Most people will have to replace the frame entirely. When replacing the frame, choose a frame that is exactly the same size as your existing frame. If you do not, you will not be able to properly install the flooring.
Step 5 - Replacing the Frame
Once you have either repaired or replaced your frame, you will need to fit it again. This is done in exactly the same way as when you took it out, only in reverse. Start by adjusting the feet so that the frame is the right height off the floor. Also make sure that the frame will be level with all of the others.
Then, you need to decide whether or not you want to replace the panels. If one of the pedestals becomes damaged, your floor can bow and look unsightly. If any of the panels need to be replaced, be sure you choose the right shape and size of floor panel.
Step 6 - Finishing Touches
It is normal to leave fingerprints on the metal panels. Consider cleaning the floor panels using stainless steel polish to get a better result.
Source: www.DoItYourself.com