Complexities of Curtain Wall Flanking Transmission – A Case Study

Authors

  • Kelly Kruger Building Science Engineering Ltd.
  • Robert Ogle Building Science Engineering Ltd.

Abstract

Curtain wall construction is very common in modern commercial buildings. The continuous external façade can lead to significant limitations on the sound isolation between adjacent rooms, separated either laterally or vertically. Flanking transmission of curtain wall systems is very difficult to predict at the design stage of a project. Manufactures do not routinely measure this parameter. The scarcity of data is partly due to a lack of laboratories that have the necessary specialized test environment. Generic flanking transmission loss data is of little value because of the large variation in curtain wall assemblies. Designers are often left with best guess approximations based on previous experience. These factors  also  make it difficult to significantly improve flanking transmission of an existing curtain wall installation.

This paper describes a project where significant flanking along the curtain wall resulted in poor sound isolation between floors. Due to the complexity of the junction between the curtain wall and the floor structure, several potential flanking paths were identified and evaluated. It was possible to alter each flanking path individually so that the incremental improvement of each step could be quantified. After implementing several modifications, an improvement of approximately 15 dB was observed across a wide frequency range.

Downloads

Published

2019-10-16

How to Cite

1.
Kruger K, Ogle R. Complexities of Curtain Wall Flanking Transmission – A Case Study. Canadian Acoustics [Internet]. 2019 Oct. 16 [cited 2022 Aug. 14];47(3):54-5. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3338

Issue

Vol. 47 No. 3 (2019)

Section

Proceedings of the Acoustics Week in Canada

License

Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i)    to publish, reproduce, distribute, display and store the Contribution;
ii)    to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii)    to exploit all subsidiary rights in the Contribution,
iv)    to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v)    to licence any third party to do any or all of the above.