Murray's Acceptability CriterionAnalysis Procedure 3. Calculate the Natural Frequency

Murray's Acceptability CriterionAnalysis Procedure 3. Calculate the Natural Frequency

• f = first natural frequency, Hz.
• g = 386 in./sec/sec
• E = 29000 ksi
• W = total weight supported by the beam, kips

NOTE: for the weight due to live loads, 10% - 25% of the design live load is a good estimate.

• L = span, in.

f = (p/2) g E I / W L

t

3

Previous slide

Next slide

Back to the first slide

View Graphic Version