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Sister, sister

Posted by JT on November 24th, 1997 09:53 PM
In reply to floor joists by niall d on November 24th, 1997 12:16 AM [Go to top of thread]

You should also sister the center support, this type
of construction is much "springier" than either alone.
Interestingly, there was an article in Journal of Light
Construction a couple issues ago that looked at this.
Turns out people object to the floor is it's resonant
frequence is in the 10 Hz range but are happy if
it is raised to about 15 Hz. 10 Hz is around the resonant
frequency of our internal organs.

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