Abstract
Cross-laminated timber (CLT) elements have gained in popularity, resulting in more measu-rement results being available. Several studies have been performed on wall and floor con-structions, with handbooks and papers offering data and prediction methods. Norwegian design guidelines have been used to condense results from research and measurement cam-paigns to enable application in the building sector. A separate task is now a design guide on CLT inner walls based on collected data and prediction results.
This paper presents the results of analysis focusing on the comparison of the collected measurement data with results from predictions based on both numerical and analytical methods. The main goal is to simplify the process of designing a CLT wall structure.
Both single and double CLT walls as well as CLT walls with different acoustic linings are included. Results show that it is not possible to achieve R'w ≥ 55 dB (common requirement between apartments) for such double wall solutions without additional measures, but prediction methods should be further examined due to the significant spreading of results. For CLT wall solutions with some kind of acoustic lining, analytical methods have been applied.
Summarized, the predicted results based on these equations coincide to a high degree with the available measurement results, also in the low frequency range.