Subject: Bouncy floor. New beam didn't fix?
From: "Michael Daly"
Date: 10/21/04 2:12 PM Pacific Daylight Time
Message-id:

SNIP

I agree with all Mike's comments, except

If the new support beam doesn't give, you would expect a big change - the
reduced span would have a much higher resonant frequency (about 4 times
higher due to halving the span).

Shouldn't that be the square root of 8 (2.8) not 4?