Evaluation of Construction Cost, Time, and Sustainable Attributes of Drywalls Supported by Resilient Channels
Round 1
Reviewer 1 Report
Interesting results.I would be interested in learning about the constructability.Author Response
It's an honor for you to say so.
Thank you for reviewing the thesis. We will continue with the subsequent research of this study and rewrite the thesis with the developed results.
I hope you and your familly to be safe from COVID 19.
Author Response File: 
Author Response.docx
Reviewer 2 Report
The article is of practical nature. What is its scientific purpose and novelty ? The formula (6) is blurred.
Author Response
Resilient channel is known as a good material that improves sound insulation performance, but it is a material that is not well used in high-rise buildings due to inconvenient construction. This study improved such points, shortened the construction time, enabled mass construction, and applied it to buildings such as hotels, and analyzed the overall building maintenance cost, CO2 generation, and LCC that can be obtained.
Therefore, the first scientific purpose and novelty of this study was to develop a construction method to apply building materials to new construction sites, and it can be applied to all spaces (floor, ceiling) using resilient channels.
The main content of the development of the construction method was to change the screw fixing method to the fitting fixing method.
The second purpose of this study was to determine how the sound insulation performance is improved when the resilient channel is installed on the wall.
Figures 6 and 7 show these details well, confirming that the sound insulation performance of the low frequency band is improved as the natural frequency in the low frequency region moves to a lower frequency region after the resilient channel is constructed.
Author Response File: Author Response.docx
Reviewer 3 Report
This manuscript develops a gypsum board wall with resilient channels to improve sound insulation performance, constructability, and economic efficiency. The developed wall on skyscrapers and long-term housing is also comprehensively evaluated, including sound insulation performance, the durability of the wall, CO2 emissions, and life-cycle cost (LCC). Compared to a concrete wall and a double stud gypsum board wall, the developed wall shows improved performance. Could the authors provide insights into the experimentally measured results to help reveal the underlying physics on the improved performance? Also, Fig. 7 does not seem to be cited in the main text. Please also define the abbreviations at their first occurrences in the abstract, main text, and figures.
Author Response
The resilient channel is a material that is installed between the gypsum board and the stud, and plays a role of reducing the transmission of vibration by decoupling the gypsum board and the stud. In addition, since the wing shape of the resilient channel has elasticity, the vibration energy of air particles transmitted to the gypsum board surface is damped by the channel, and the transmission of vibration is greatly reduced. And, when the resilience channel is constructed, the air layer inside the gypsum board increases, and as a result, the natural frequency of the drywall moves toward the lower frequency, improving the sound insulation performance in the low frequency region.
I chanaged Fig 7 as Fig6, 7. Because Fig 6,7 is same Fig to explain the vibration test result.
I aefined some abbreviations at their first occurrences
1) C-studs(used as the vertical support in wall framing)
2) life-cycle cost (LCC)
3) "severe duty”(SD)
4) Kumkang Coryo Company(KCC)
5) The Rw+C value, used as a measurement index, is the index spectrum adjustment term (C) to correct the single-number rating (Rw) and receiver frequency characteristics
Author Response File: Author Response.docx
