ISO 24323:2023

Timber structures — Design method for vibrational serviceability of timber floors

Scope

The design method provided in this document addresses vibration induced by walking action of occupants and covers the following timber floor systems:
a)       Light frame floors built with timber joists spaced at a distance of no more than 610 mm with a layer of structural wood-based subfloor that is connected to the joists using mechanical fasteners or adhesive. The area density of a bare light frame floors without a screed (topping) and ceiling is not greater than 25 kg/m2. Figure 1 shows such a light frame floor.
b)       Mass timber floors built with mass timber panels such as cross laminated timber (CLT).
This document consists of three elements:
a)       a baseline vibrational serviceability design criterion for timber floors using fundamental natural frequency and 1 kN static point load deflection as the design parameters including two types of design criteria, coupled and decoupled criteria;
b)       equations for calculating the design parameters;
c)        guidelines for the design values of the physical and mechanical properties of floor components.
The design method is based on the assumption that the floor system has a single span and simple support conditions.