Span effects on the static and dynamic response of low profile timber floors for Plywood Association of Australia

"This report describes test procedures followed to establish the static and dynamic response of a 3.6m wide x 7.2m long, two bay, timber framed, plywood sheathed Low Profile Floor (LPF) system. Timber framing was 190 x 45mm x F5 seasoned pine with 17mm thick x F11 tongue and grooved structural plywood glue/nailed to the top surfaces to provide the deck. Flanges glue/nailed to the underside of reinforced edge L and centre tee beam bearers were 120 x 35mm x F5 seasoned pine. The influence of span on structural response (both static and dynamic) has been investigated and some recommendations to control floor vibrations have been made. These recommendations are associated with limiting composite tee-beam bearer and joist stiffnesses to 1.5kN/mm and 0.75kN/mm respectively for spans up to and including 3.6m."--p. (i).