In a new custom-built home, the 3,000 sq ft ground floor is supported
by an 8-course block foundation and TJI's over a crawl space. The
laundry room and clothes washer is located in an area resting on an
18' TJI span supported on the foundation at each end.
On the clothes washer's slowest spin cycle, vibration radiates out to
15' enough to loosen drywall screws and cause moldings to separate at
To damp the vibration, we braced one of the two TJI's right under the
washer with a 4x4. There is some improvement but not enough. We are
looking for more ideas as to what can be done.
Should we try installing additional bracing under the TJI's in the
location of the washer: more 4x4's, several permanent jacks, concrete
block columns, etc.?
An additional possibility is to install vibration-absorbing pads. One
product aimed at the retail market can be seen at
http://www.kellettent.com/ (very slow loading website): the "LP-13
Shake Absorber® Vibration & Isolation Pad" described at
The IQS Directory lists many suppliers of vibration absorbers, but
they seem to be mostly industrial:
We would be grateful for any thoughts, ideas, suggestions.
Thanks in advance.