INTRODUCTION

Cross-Laminated Timber (CLT) structures are made of layers of timber boards that are glued to each other. The boards of each layer are oriented perpendicular to adjacent layers so similar structural properties can be obtained in both directions.

In general, timber structures are harder to acoustically isolate due to their lower mass compared to concrete structures. Due to this, the proper selection of acoustic insulation products becomes more critical.

suspended ceilings for CLT structures.

THE PRODUCTS THAT HAVE BEEN TESTED ARE:

EP 700 + SYLOMER ACOUSTIC HANGERS

The EP 700 + Sylomer® mounts are anti vibration mounts that have been designed for the hanging of suspended ceilings and walls. They have a direct fixing system, which allows a simple and quick installation without the use of rods. They are particularly suitable for wooden ceilings, usually being fixed by two screws. These mounts are typically installed every 0.5-1 meters. But this feature may be tuned to adapt to the load or natural frequency requirement of the application. The natural frequency at their optimal loading point reaches values below 10 Hz. These technical properties provide a high level of noise and vibration isolation when used in light wooden structures.

RESULTS OF THE LABORATORY TESTS

Main Characteristics

The test area consists of a 5mx4m (20m²) of Best Wood CLT. The EP 700 + Sylomer hangers are distributed along all the surface of the ceiling and hang 2 layers of 12.5mm of plasterboard with a plenum of 100mm for all configurations.

Measurement conditions

• Test area: 20m2
• Mass per hanger: 8.6kg/hanger
• Rel. humidity in test rooms: 51 - 54 %
• Static pressure in test room 2: 950 - 956 kPa
• Air temperature: 17.5 - 20°C
• Volume of source room: 52/m3
• Volume of destination room: 59/m3

Main Characteristics

In order to show the acoustic advantages when using EP 700 + Sylomer acoustic hangers in a Cross-Laminated Timber structure, impact noise and airborne noise tests are carried out with different configurations:

This way, the acoustic performance of different configurations by using the EP 700 + Sylomer® acoustic hangers can be seen.

Results

The results of the acoustic tests with each configuration are shown below:

These results clearly show how the noise insulation can be improved in CLT structures by using various configurations using EP 700 + Sylomer acoustic hangers.

Do not hesitate to contact our application engineers for more information on this product.