Comfort

Comfort class

Based on the peak acceleration limit value the comfort class can be defined as:

Comfort class	Degree of comfort	$a_{w,pk} \quad m/s^{2}$
CL1	Maximumm	$< 0.5$
CL2	Medium	$0.5 - 1.0$
CL3	Minimum	$1.0 - 2.0$
CL4	Intolerable	$> 2.5$

Based on the crest factor a further evaluation must be required if:

Crest factor ($P$)	Evaluation required
$< 6.0$	Basic
$\ge 6.0$	Detailed

Recommended limit values for floor vibration serviceability based on the peak acceleration and the Maximum Transient Vibration Value (MTVV) according to:

• BS 6472-1:2008: Guide to Evaluation of Human Exposure to Vibration in Buildings: Vibration Sources Other Than Blasting. British Standards Institution, 2008

• A. L. Smith, S. J. Hicks, and P. J. Devine. Design of floors for vibration: A new approach. Steel Construction Institute Ascot, Berkshire, UK, 2007.

are given in the following table:

Floor type	MTVV $\left(m/s^{2}\right)$	$a_{w,pk}$ $\left(m/s^{2}\right)$
Hospital	0.005	0.007
Residential	0.010	0.014
Office	0.020	0.028
Workshops	0.040	0.057