EXAC - STC Rating 2024/2025 Exam
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What is the STC rating? - 🧠ANSWER ✔✔Sound transmission class
What is the required STC rating according to National Building code for
residential dwelling Unit. - 🧠ANSWER ✔✔STC rating of 50.
What is ASTC - 🧠ANSWER ✔✔STC rating describe the performance of the
separating wall, floor / ceiling assemblies.
ASTC Rating take into consideration the performance of the separating
assemblies and flanking transmission path.
So for the occupant point of view ASTC rating is a more accurate account
of sound transmission.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
, the selection of sound- absorbing material had major effect - is this
statement true or false - 🧠ANSWER ✔✔false -The type of sound-absorbing
material has a relatively minor effect on the ability of the wall to control
sound. There are clear benefits associated with increasing the spacing
between studs and resilient channels - the farther apart they are, the better
the sound reduction.
provide STC consideration with the use of Rigid Versus Non-Rigid
Connections Between Layers ? - 🧠ANSWER ✔✔When the gypsum board
in a wall is solidly fastened to the wood studs on both sides, much of the
sound is transmitted through the studs.
- It is thus important for the two wall surfaces to be supported
independently from one another in order to control sound transmission.
This can be done by fastening the gypsum board on each side of the wall
to different lines of studs (i.e., by using staggered or double wood-stud
arrangements) or by supporting one side of the wall on resilient channels.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
Questions with Detailed Verified
Answers (100% Correct Answers) |
Already Graded A+
What is the STC rating? - 🧠ANSWER ✔✔Sound transmission class
What is the required STC rating according to National Building code for
residential dwelling Unit. - 🧠ANSWER ✔✔STC rating of 50.
What is ASTC - 🧠ANSWER ✔✔STC rating describe the performance of the
separating wall, floor / ceiling assemblies.
ASTC Rating take into consideration the performance of the separating
assemblies and flanking transmission path.
So for the occupant point of view ASTC rating is a more accurate account
of sound transmission.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
, the selection of sound- absorbing material had major effect - is this
statement true or false - 🧠ANSWER ✔✔false -The type of sound-absorbing
material has a relatively minor effect on the ability of the wall to control
sound. There are clear benefits associated with increasing the spacing
between studs and resilient channels - the farther apart they are, the better
the sound reduction.
provide STC consideration with the use of Rigid Versus Non-Rigid
Connections Between Layers ? - 🧠ANSWER ✔✔When the gypsum board
in a wall is solidly fastened to the wood studs on both sides, much of the
sound is transmitted through the studs.
- It is thus important for the two wall surfaces to be supported
independently from one another in order to control sound transmission.
This can be done by fastening the gypsum board on each side of the wall
to different lines of studs (i.e., by using staggered or double wood-stud
arrangements) or by supporting one side of the wall on resilient channels.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
