Wood Design Focus

A Proposed Rule of Thumb for Controlling Annoying Vibrations in Residential Floors

Publish Year: 1996 Reference ID: N/A Authors:
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Long-span residential floors framed with sawn joists,
wood I-joists, or trusses are sometimes plagued with annoying
vibrations. A simple deflection design rule of thumb is
proposed that in most cases should yield a floor with
satisfactory performance from a vibration standpoint. The
proposed rule of thumb limits deflection under live load to
L/360 for members spanning up to 15 feet, and to L/480
for members spanning 15 to 30 feet.

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