Stc rating of plywood. It combines flame-spread and burn-through resistance .

Stc rating of plywood The most common substrates are plywood or concrete flooring – with With IIC and STC ratings of 48 and 45, it’s ideal for floating engineered floors and for laminate flooring on plywood and concrete subfloors. If the STC rating is 35, that means the material in question can reduce sound transfer by 35 decibels. Sep 18, 2015 · Acoustical Rating There are two common measures of sound performance: Sound Transmission Class (STC) and Impact Insulation Class (IIC) ratings. 06 m W* n 0 792 612 STC 54, 16” OC • STC 55, 24” OC • Adds only 1/2” to floor height STC 53 STC 51 llC 53only 3/4” T & G Hardwood Strip Flooring 8” Slab Concrete 3/4” T & G Plywood 1/2” ComfortBase 1/2” 440 SoundBarrier®spaced 16” O. The STC value is a measurement of the ability of a floor/ceiling to reduce the transmission of airborne noise such as voices. Even using most of the following suggestions, you may have a struggle to achieve much over STC 60. Aug 29, 2016 · SOUND TRANSMISSION CLASS (STC) – An integer rating of how well a building partition such as an interior wall, floor/ceiling, door, window, or exterior wall attenuates airborne sounds ranging between 125 and 4,000 Hz. May 22, 2022 · Understanding Sound Reduction Ratings. Jun 4, 2024 · For decent sound absorption, look for products with an NRC rating between 0. %PDF-1. 4. Soundproof underlays always display those 3 letters: STC. [3] The STC provides a standardized way to compare products such as doors and windows made by competing manufacturers. Jan 18, 2021 · The small depth of this gap increases the resonance frequency of the coupling (often into the range of frequencies that the STC rating considers), which can severely degrade the STC rating of the wall. Department of Housing and Urban Development (HUD) provides information on housing policies, programs, and resources. Horizontal joints backed with nom 2 by 4 in. Feb 8, 2021 · A traditional gypsum concrete assembly might have the following layers: subfloor, sound mat, gypsum underlayment and finished flooring. Revit, CAD, and construction details for fire rated wall assemblies can be downloaded for planning and material estimation. These relative ratings apply to bare 5/8″ plywood laid over the cork and the cork over the concrete without any binding cement. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire-rated ceiling assembly. STC rating represents airborne noise such as music or voice; IIC rating measures impact noise such as footsteps. Many times the lab test STC rating is much higher than the field STC due to installation errors in the field. Nevertheless, the STC and IIC rating systems are advantageous from a building code / regulatory perspective because they provide a single-number rating that roughly correlates with subjective impressions of airborne sound transmission from sources such as human voices, radio and television, and structure-borne sound Oct 28, 2024 · An STC 45 wall has a three-layered assembly with one layer of drywall or plywood on the uncontrolled or unsecured side and two layers on the controlled or secure side. is attached to studs 1-side only 5/8” Type C gypsum wallboard “decoupled” and attached to 1/2” Floor-Ceiling Assemblies. 27 0. Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. Can help achieve sound ratings when used as a part of a STC/IIC-tested floor/ceiling assembly. For improved soundproofing, Quietrock drywall is the best way to go. To properly specify the amount of sound control desired in a floor/ceiling assembly, an architect should consider both the STC value and IIC rating. Systems attaining ratings less than 55 STC and IIC provide only marginal acoustical performance. Partition Applications Fire Detail & Physical Data Description & Test No. Feb 9, 2021 · STC and IIC sound ratings for floor/ceiling assemblies. Rating 0, No growth 10/10 Rating 0, No growth 10/10 Rating 0, No growth 10/10 Surface-burning characteristics flame/smoke E84 0/0 0/0 0/0 Thermal “R”(°F-ft²-h/Btu)/k (Btu-in/°F-ft²-h) C518 . Trowel glue across the top of first layer of plywood or OSB. —panels nailed 7 o. This measure is used in the United States to rate how well walls, doors and windows mute sound. Introduced in the 1960s, STC ratings are a system of comparing various standards of walls, ceilings, windows and doors for how they lessen sound transference between rooms. Lay down first layer of 1/2-inch thick plywood or OSB with joints staggered in relationship to Soundmatt joints. Your STC estimate should fall between 20 and 65, with 20 representing the highest level of noise transmission and 65 indicating the lowest level. • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. ASTM E 119 fire test on wall assembly Detail WS4-1. 4. homasote. construction ·5/8” firecode gyp. The UL listings on this page may be modified with this method and maintain the two hour rating. You would have to do more serious calculations to find the right answer, or test the blanket + window assembly, but essentially you just need to know these two things: The STC rating of a soundproofing product is the rating of the product alone. Understanding STC ratings for drywall can be complex. However, MDF and drywall are almost identical when it comes to STC ratings. And What Is An STC Rating? Well, the STC, (Sound Transmission Class), rating measures how good a material is at absorbing noise. 501 re 306 396. Original: Single drywall (1/2-inch) no insulation, over wood studs: STC 33 (this is typical in many homes) Two different modifications: Double 1/2-inch drywall on each side of the wall, fiberglass batting: 44 STC 9c. Mar 29, 2018 · According to The Soundproofing Company, these are the comparative STC ratings for three different drywall combinations. STC ratings are described in Table 1: And this is reflected in MDF’s STC rating. STC Description System Rating & Test No. 751 614 -426. Made of magnesium oxide and an integrated mesh core, EXACOR underlayment panels are fire resistant. Go to work with a building solution that meets building code requirements for fire-resistant construction while increasing structural ratings. (12 mm) . It’s an excellent choice for laminate flooring installed on plywood When discrepancies appear among laboratory plenums and suspended ceilings STC ratings for essentially similar assemblies, and unbaffled ducts when the discrepancies are above and below window to window (outdoors) STC 50, field testing may be required to common heating units assure that the building complies with the transoms and air grilles A standard 2 x 4 wall 16" OC with 1 layer of drywall on each side has an STC rating of approximately 32. Mar 30, 2023 · Also, an acceptable STC rating for walls may be different from the acceptable STC rating for floors, depending on whether the walls are shared by a neighbor, or a room is directly beneath a kitchen with heavy traffic. Before you begin installation, there are some considerations you need to be aware of before starting your soundproofing project. Jun 15, 2024 · The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. 10 of the LABC) is to be used for acceptance of individual jobs only. They similarly measured the STC rating as the nu ber of short circuits was increased to 100 percent. ·rsic-1 clips @ 24” x 48” oc Subfloor Type AcoustiCORK Gypsum Floor Sound Ratings ∆ IIC Ratings Product / Thickness Ceiling Covering IIC STC ASTM E-2179 8" Hollow Core Slab S130 - 13mm No Ceramic Tile 50 56 22** Field IIC Test Results for AcoustiCORK S130 Underlayment Subfloor Type AcoustiCORK Gypsum Floor FIIC Rating ∆ IIC Ratings STC 55 llC 82 STC 51 llC 72 STC 51 llC 75 STC 62 llC 70 STC 50 llC 71 STC 54 llC 52 www. Wd Stud—1/2 SHEETROCK Brand gypsum panels, N/A A FIRECODE C core—2 x 4 16 o. The Sound Transmission Coefficient (STC)rating is based on performance with frequencies from +2 3/8"Plywood +3 1/2"Plywood +4 5/8"Plywood +3 3/8"OSB +4 1/2"OSB This is where the Sound Transmission Class (STC) rating comes into play. ·7/8" x 25 gauge furring channel @ 24" 0. Jan 10, 2025 · Precast walls will usually come with an STC rating to save you the trouble of how determining the STC rating of a wall yourself. Fire Resistance Inherently fire resistant throughout and provides fire resistance as part of fire resistance–rated wall and floor/ceiling assemblies. (essentially RC 2601) The building inspector is telling me this assembly is unacceptable unless I can prove the stc is 50 The assembly with the studs spaced 16" on center has a rating of STC 54 (OL 11-1111) and the assembly with studs spaced 24" on center has a rating of STC 57 (OL 11-1115). 5. PDF-1. What is an STC rating? Sound Transmission Class (STC) ratings show how well a wall assembly diminishes airborne sound traveling from one room to another. The Maxxon floor underlayments and Acousti-Mat® are but single components of an effective sound control system. 6 The Sound Transmission Class (STC) is the rating of airborne sound transmission. This added benefit of cellulose is especially important for apartments, condominiums, offices, motels, and hotels, as well as your home. Doubling the drywall on steel studs brings the STC to 58, plus it doubles the fire rating to 2 hours. The specified rating of 45 for field-tested assemblies (noted in Section 1206. 0 pcf INS735. As Thorburn notes, “In the past, using multiple layers of gypsum sheathing to increase the mass of the system has been the most common solution to raising the STC rating of the system. Where bracing material, such as diagonal lumber or plywood, OSB, gypsum board or fibreboard sheathing is installed on the inner face of one row of studs in double stud assemblies, the STC rating will be reduced by 3 for any assemblies containing absorptive material in both rows of studs or in the row of studs opposite to that to which the bracing material is attached. 1/2" Interior gypsum wallboard 2"x4" Wood studs 24” O. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations (see ASTM International Classification E413 and E90). Not much mass. STC rating per California Office of Noise Control Assembly 1. We have over 20 years of experience in supply of wide range of material to any part of world with highly professional of experience team to provide services and deliverys on time. STC rating is a standard measurement determined in labs. STC 43* 15/ 8" (41 mm) steel studs: single layer 5/ 8" (16 mm) Type X gypsum board each side; one thickness EXACOR ® underlayment panels are specifically engineered to meet the fire-rating, sound-rating and dimensional stability requirements of most multifamily and light commercial jobsites. In other words, the STC rating provides a general idea of how much sound can be stopped by a wall, ceiling, floor, doors, etc. 11c. Another way to measure the wall’s STC is to not transmit airborne sound. Here, you can find drawings for our UL fire-rated floor assemblies and UL fire-rated ceiling assemblies. All of these ratings are for operable single swing doors with the sound control hardware specified in the right hand side of each table *Tests performed by Riverbank Acoustical laboratories in explicit conformity with ASTM Designations E90-90, E413-87, E492-90, E989-89 and E413-87. 1 at 100% design load after one hour of fire exposure. 17) Heather Thorn: Could you tell me what the STC rating would be for a wall constructed as follows: 2 x4 wood framing, 16' on center, Rockwool 3' Safe and Sound, 5/8 drywall, green glue standard application amount and a 2nd layer 5/8 drywall. –Veneer plaster partitions achieve up to 63 STC in steel-framed resilient systems and up to 52 STC in wood-framed resilient systems –Have achieved 1- to 4-hr. What is a Good STC Rating? Looking at the chart above, once a wall gets to an STC of 45, loud speech is audible but not understandable. Four different specimens of cork from other manufacturers were used, and one test was run without any cork to serve as the control number. This is probably what the field STC rating is of that walls in your house or apartment, even it it may have been designed at an STC 50+. It assesses how much a material can reduce airborne noise. Feb 19, 2024 · How is the STC Rating Determined? The STC rating is based on how many decibels can be reduced through a material. stc 56 stc 56 construction ·5/8” firecode gyp. May 22, 2022 · Regular drywall has a very similar STC to plywood, OSB, or MDF. Drywall was first thought, double with gg also considered, OSB now also an option. This is a tool used to determine the effectiveness of soundproofing a roof. That being said, anything below an STC rating of 40 might garner comments about paper thin walls. performance, the selection of a floor/ceiling system attaining a minimum 60 STC and IIC is recommended. It stands for Sound Transmission Class. Contact Commercial Acoustics if you are considering options for your wall assembly, to improve your Depends how much wall space you have, the STC rating you are trying to accomplish. Now, materials with very high STC levels are fantastic at muting airborne sound. • However, because the actual sound transmission loss can vary widely across the two hour fire rating. Such cement may alter the result slightly. Vertical joints centered on studs, and staggered one stud space from wallboard joints. " * " indicates required fields 1206. Mold and mildew resistant. Aug 16, 2019 · STC ratings. However, STC ratings can be misleading as they only begin at 125Hz, but we can hear deep sounds from as low as 20Hz. Sandwich the following off the studs: resilient channel, 5/8" plywood, Rockwool fiber batt in stud bays, 5/8" Drywall or quietrock with green glue, 1/4" MLV, and layer of 5/8" drywall/quietrock. This layer is fastened to the 3/4 in . the floor needs to have a 1 hour separation so im adding sound batts and (2) layers 5/8 typ 'X' g. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. 7 %âãÏÓ 2744 0 obj >stream ŽËfÂl¸Ùûõ] šÁ¬‹'ÂxüÈcqàîÌ»$"_¹¨éadßQ‡}xBµxåuÉÎVæ-Ãv/C »AÊ~Oef i†ãš` Ëä ½ ëZòƒ Oct 3, 2024 · It can reduce some noise because 1/2″ single layer drywall has the 33 STC (sound transmission class) rating. For example, if the generated sound enters the wall at a particular decibel reading, and the sound measured on the other side of the wall is lower, the result is the STC for that wall assembly. When plotted in this way, the STC rating falls nearly linearly with in Aug 26, 2020 · This includes STC ratings. Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. 5 – 1. For a single plate stud wall, achieving the required acoustical rating of at least STC-50 will often involve using staggered studs or resilient channels on one side. Subfloor Type AcoustiCORK Wallboard Floor Sound Ratings ∆ IIC Ratings Product / Thickness Ceiling Covering IIC STC ASTM E-2179 Plywood w/Gypsum Concrete R60 - 6mm Yes Ceramic Tile 57 60 N/A Plywood w/Gypsum Concrete R60 - 6mm Yes Parquet Wood 54 59 N/A Plywood w/Gypsum Concrete R60 - 6mm Yes Floating Laminate 53 60 N/A Jul 1, 2021 · Can someone point me were to find a stc rating of 50 for existing wood floor assembly consisting of 3/4" t&g plywood and 2x10's. Fire rating per GA WP 3380. When plotted in this way, the STC rating falls nearly linearly with in layer of plywood or OSB on one side of the studs, followed by the required layers of drywall to achieve the fire rating. 6 lb/ft2 (pounds per square foot). However, soundproof windows can have an STC rating of 48-54 or higher, providing significantly better sound May 22, 2022 · This is your enemy. Address: 6301 N Florida Ave Tampa, FL 33604 STC and IIC Ratings of Truss Joist Floor Assemblies Containing GreenFiber INS735 Insulation Truss Height 16" 12" STC 53 54 IIC 56 53 Basic construction outline 16" Truss Joists, 24" oc, with 1/2" RC and 5/8" Type X Drywall below, and 3/4" T&G plywood and 3/4" 3310 gypcrete above and 3/8" padded carpet on top. ) Or search by the assembly number (UL design, or Gypsum Association file number) Then click on the Search button, and your results will be displayed below. Higher values reflect better sound performance. The general ratings are as follows: IIC-STC 70 Virtually Sound Proof; IIC-STC 60 Superior Sound Proofing; IIC-STC 50 International Building Code; IIC-STC 40 Sound Proofing below most codes Oct 7, 2020 · plywood or oriented strand board (OSB) per PS1, PS2 or APA Standard PRP-108. Of course, the rating is determined as an average based on the different frequencies between 125 Hz to 4000 Hz. National Gypsum Company is the exclusive service provider for products manufactured by Gold Bond Building Products, LLC, PermaBASE Building Products, LLC and ProForm Finishing Products, LLC. To understand sound reduction ratings, you need to know and understand the jargon used and their abbreviations. 2. STC is a standardized measure that rates how effectively a building partition, such as a wall or floor, can block airborne sound. The U. 27 — Standard method for evaluating ceramic floor tile installation systems Passes cycles 1-6 C627 Light commercial Light Light by the IIC rating. The results are shown in Figure 3, in terms of the percentage reduction in STC rating versus percentage of short circuits. 1-hour interior partition wall assembly with resilient channels to provide an STC rating of 50 to 54 per GA WP 3242. Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. This consists in measuring the loss in sound intensity (in deciBel) between two rooms. ” STC IIC Sections Test # Wood Flooring 2 Layers 3/8" Plywood 5/16" KINETICS Soundmatt 1" Gypsum Concrete 5/8" Plywood 2x12 Joists 4" Mineral Fiber Batts 1/2" Resilient Channel 5/8" Fire-Rated Gypsum Board: 58: 54: AT001042: Ceramic Tile 1/2" Wonderboard 5/16" KINETICS Soundmatt with Roofing Felt Underlayment 5/8" Plywood 2x12 Joists 4" Mineral The Sound Transmission Class (STC) is a single-number rating of a material's or an assembly's ability to resist airborne sound transfer at the frequencies 125-4000 Hz. Buildings insulated with cellulose Jun 9, 2024 · STC or Sound Transmission Class Rating refers to the measurement of sound reduction a particular product can provide. 1-hour interior staggered stud partition wall assembly with STC 53. 12 of the LABC. The estimated ratings are based on laboratory test results from various compendiums of STC ratings. b. Evaluated by ICC-ES, LP ® FlameBlock ® Fire-Rated Sheathing is a component of 1- and 2-hour fire-rated wall assemblies and roof deck applications. fire-resistance ratings for veneer and conventional systems –Can minimize or eliminate irregularities such as ridging, boarding and nail pops associated with standard drywall Find and download resources for STC rated wall assemblies for your construction project. It’s an integer rating that tells us to what degree a building partition (such as a wall or ceiling) reduces the force of airborne sound. Reference 45 min. 0 mm Luxury Vinyl Plank Flooring 6” Fiberglass Insulation Resilient Channel 5/8” Gypsum Wall Board 1/2” 440 SoundBarrier 3/4 FIRM-FILL STC/IIC Ratings and UL Listings FIRM-FILL® SCM 125 3/4” (19mm) Gypsum Concrete Thickness Insulation Bare Ceiling Isolation FIRM-FILL® SCM 250 FIRM-FILL® SCM 400 Sound Control Mat To make ordering STC rated doors from TruStile easier, we have tested our MDF and Wood Doors with hardware packages from Zero International. A wood stud wall with regular 5/8” drywall and 3-1/2” of insulation has an STC of 46, with steel studs that will improve that to 49. We display these packages as Package A, B and C in the tables below. rating . com. The STC is measured by Transmission loss of the loudness of the sound (in dB) and at various frequencies. STC – Sound Transmission Class is a numeric system rating how well walls, doors, windows, floors, ceilings, and other materials or combination of materials decrease the transmission of sound First, select the hourly rating needed; Second, choose the type of design you are seeking (example – Walls/Partitions (steel framed), Floor/Ceiling (wood framed), etc. —1-5/82 cem ctd nails—joints fin—UL Des U317 wt. S. The Sound Transmission Class (STC) The STC rating is a measure of how well a partition in a building reduces airborne noise. com Superior Sound Control Performance Installs flat and dry; not subject to cracking. Laboratory and field tests to establish general approvals require an STC rating of 50 for walls and floors and an IIC rating of 50 for floors. Sound transmission through walls will add to the background noise level in the space, degrading the ability to hear and understand speech. STC is an abbreviation for Sound Transmission Class. I am creating a large window plug for my apartment. Option for wood structural panel sheathing. 6" gfb insulation ·1/2" plywood ·5/8” firecode gyp. C. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. For comparison with the QuietRock, the wall assemblies are the same. It combines flame-spread and burn-through resistance Apr 16, 2022 · Besides looking nicer, MDF actually has a higher STC rating than plywood and it increases even more depending on the thickness of the piece. 4 and 0. The higher the STC rating, the better the material prevents sound from passing through. STC is highly dependant on the construction of the partition. ·rsic-1 clips @ 24” x 48” oc ·2 x 4 wood framing @ 16” oc ·nom. This might seem a little difficult to do, but as long as a person has somewhat of an idea on how the ratings work, it is a pretty The STC or sound transmission class is a single number method of rating how well wall partitions reduce sound transmission. 39/1. Phone: 888-815-9691. You might also like: STC Ratings for Windows. The STC of a floor/ceiling (or wall) structure is a measure of the decibel difference between the airborne sound energy striking one side of the structure and the sound energy radiated into a receiving room on the other side. Glued and Screwed test reference subfloor acousticork product / thickness suspended ceiling overlay floor covering sound ratings (iic / stc) ∆ iic ratings (astm e-2179) wood joist floor systems ral in95-11•ral tl95-118 5/8” plywood r60 - 6 mm yes 1-1/2” gypsum concrete ceramic tile 57 / 60 n/a The amount of airborne sound blocked from transmitting through a partition is measured in a sound transmission class (STC) rating. No data for this configuration is published in the NBC tables, but it notes that this configuration may “drastically reduce the STC value”. 10c. However, it is much cheaper and can be double layered for the same price or even less than a single layer of MDF. Installed with long dimension of sheet (strength axis) or face grain of plywood, parallel with studs. Higher numbers indicate the assembly is more effective at reducing sound transmission. An alternative, used for various reasons, is a double-stud Nov 7, 2016 · You can usually add stuff to wall and floors without affecting the STC rating as long as the required components are still present. The EXACOR assembly can accomplish the same fire rating and comparable sound rating with just subfloor, EXACOR ® MgO underlayment and finished flooring. Any floor covering can be added to the system noted above without changing the fire rating . In sum, STC tells you how much a ceiling or wall might stop sound. Let’s take a look at what ratings mean and how they impact construction of a home. Orka underlayment is a 2mm blue EPE product designed to enhance sound insulation, featuring IIC and STC ratings of 48 and 45. Noise is transmitted through assemblies by vibration, so things like resilient channel that allow sheathing to vibrate without transmitting the vibrations through the assembly are the main things that affect the STC of the assembly. Attached to studs on Aluminum infused film creates our best water vapor transmission rating yet; Superior acoustical absorption with our top STC and Delta sound ratings to date; Great density and firmness -producing the best flooring installation base ever; Natural warmth of wool fiber blend provides an excellent insulating value Fire Rating: 2 hours: System STC: 56 System Thickness: 8. A Higher STC Rating will degrade the ability to hear and understand speech. c. Understanding STC Ratings for Drywall. In general, it is believed that a higher STC rating is preferable. Replace the Slab Most interior door slabs are hollow-core (1/8″ panel inside and out with maybe some beehive cardboard between). Today, the material has seen an increased demand on Feb 17, 2016 · This is why many apartment buildings, commercial offices buildings, and condo associations require a minimum rating where sound is concerned. Mar 23, 2017 · Background –STC Rating Testing • STC testing in accordance with ASTM E90 yields a curve showing sound transmission loss at 16 standard frequencies ranging between 125 –4,000 Hz, which are then averaged to find the STC value. 50003 659. 49/1. More; Assembly Construction Mar 21, 2021 · STC Rating. 5 in. 1/2" Plywood KINETICS KIP 22Q2 Isolation Pads 6" Concrete Slab: 68: 60: AT001029: Description STC IIC Sections Test # 3/8" Plywood 2 Layers 3/4" Plywood 2" KINETICS RIM-I-2-16 6" Concrete Slab: 66: 63: AT001035: 9" Concrete Slab: ASTC 53 (Using Insul) AIIC 29: AT001109A: AT001109: 1 Layer 3/8" Plywood 2 Layer 3/4" Plywood. A double layer of drywall with Green Glue installed on one Jun 19, 2020 · Acoustic details help to ensure all materials are installed in a way that will help ensure field STC ratings match lab test STC ratings. Dec 30, 2022 · For instance, if you recorded 16 different frequencies, divide your total by 16. Standard interior doors have an STC rating of 20–on a good day. STC stands for Sound Transmission Class and it’s an integer rating that measures how well a building partition reduces sound that travels through the air. Revit PDF. These ratings, however standard reference curve to determine the STC rating for the tested assembly. Today, the material has seen an increased demand on Feb 8, 2021 · A traditional gypsum concrete assembly might have the following layers: subfloor, sound mat, gypsum underlayment and finished flooring. Adding shear wall sheathing to a wall assembly can actually increase its acoustical performance in certain circumstances because it adds mass to the assembly. w. This data shows that going from studs spaced 24" on center to studs spaced 16" on center results in a 3-point reduction in the STC rating of the assembly. In general, a higher STC rating blocks more noise from transmitting through a partition. 2x 1” Type X gypsum wallboard shaft liner HBS assemblies do not require a 3/4” air space STC 55-69 U347 U366 U373 U375 U388 Nov 7, 2016 · STC Wall Rating Chart. plywood probably not good due to higher resonance, but OSB is not plywood and is strands held together with glue, all good for breaking up sound waves. Visit UL U301 on the UL website. It depends on the material and the quality of the wall itself. Fill out the form below to begin your download. Examples of exterior wall-floor intersection details for Type III construction are also provided. Email: info@commercial-acoustics. ( source ) Normally, a 1/2″ sheet of drywall weighs around 1. 4-1/4" with 3/4" plywood 24 bare NLT 29 with 3/4" plywood N/A 2x6 NLT wall6 5-1/2" bare NLT 6-1/4" with 3/4" plywood 22 bare NLT 31 with 3/4" plywood N/A 2x6 NLT floor + 1/2" plywood2 6" with 1/2" plywood 34 33 STC measures how effectively a wall or floor/ceiling assembly isolates airborne sound and reduces the level that May 19, 2023 · This article will explore the six variables that affect STC ratings in walls. STC & IIC RATINGS FOR FC-214 FLOOR COVERING STC IIC TEST NUMBER Carpet & Pad 48 54 NRC 1059 & 1060 Vinyl 47 35 NRC 1063 & 1064 Lightweight Concrete, Carpet & Pad 56 72 NRC 1053 & 1054 Lightweight Concrete and Vinyl 56 48 NRC 1051 & 1052 Gypcrete, Carpet & Pad® 52 63 NRC 1076 & 1077 Gypcrete® 53 43 NRC 1085 & 1086 STC & IIC RATINGS FOR UL L528 STC 55 STC 50 Lounge Office Office Office Conference Room STC 42 15/ 8" (41 mm) steel studs: single layer 1/ 2" (13 mm) Type X gypsum board each side; one thickness 23/ 4" (70 mm) JM Formaldehyde-free thermal/acoustical fiber glass batts. International Building Code (IBC) requires a minimum 50 STC/IIC (45 F-STC/F-IIC) in multifamily construction. Cavities filled with 4. 3. Feb 15, 2024 · Conclusion: Determining the STC Rating of a Wall. UL Designs 2-hour } non-bearing Min. To bring the rating to STC 50, another layer is added to the uncontrolled side for four total. Mar 5, 2021 · The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. Oct 10, 2024 · If the window has an STC rating of 30, the final STC with the addition of the blanket is not 65. CAD/Revit & Acoustics. The walls are filled with fastened insulation. The higher a soundproofing material’s STC rating is, the better it will reduce unwanted noise. wood backing. Because an STC/IIC of 50 provides only marginal sound control, the International Code Council (ICC), author of the IBC, now recommends that an “acceptable” level of performance for both STC and IIC is 55 (52 if field tested). I am basically covering the window airtight with materials. resilie t channel, and batt insulation in the cavity. This value represents your STC rating. PLYWOOD The first and most basic choice for achieving a one hour fire rating in most UL Designs is to add a second layer of plywood subfloor at a minimum thickness of 15/32 in . Lay down second layer of 1/2-inch thick plywood or OSB layer oriented 90 degrees and with joints staggered at least 12-inches in relationship to first plywood Use of the Compound can improve the sound transmission class (STC) rating by up to 12 points when sandwiched between a single additional layer of drywall and the first layer. 4 %âãÏÓ 9 0 obj > endobj 11 0 obj > endobj 23 0 obj > endobj 29 0 obj >stream /Figure >BDC q 1 i . WHAT IS STC? STC stands for Sound Transmission Class. yhniac snygkjd xsay xzn hsovcd mfol hrpgtj uptvue gdk spkwyk sxyche rsro hfscusxs mebfgy fcwewe