Dynamic serviceability design of attic room floors in modern timber frame houses

In this paper, the vibrational performance of roof trusses for constructing the attic room floors with various geometric configurations was investigated using commercial finite element software – SAP2000. Vibrational parameters included the mid-span deflections of the bottom chord under dead loads and unit point load, and modal frequencies up to 40 Hz and modal shapes. This study confirmed that increasing the bottom chord size and including composite bottom chord and fully composite roof truss members could largely enhance the dynamic serviceability performance of the attic room floors in timber frame houses