Floor assembly stc ratings The STC rating system looks at the amount of noise mitigation provided by the assembly over a broad range of frequencies and a single number is calculated as its rating. IIC/STC levels above are an approximation of sound reduction potential in a well designed, acoustically sound assembly. 0 pcf INS735. These ratings can be used to compare the acoustic performance of different floor-ceiling assemblies including underlayments. For super sound control even in open beam, concrete slab, and exposed ceiling/mass timber floor systems. We won’t get into the science behind that here, but just keep this in mind when considering wall and floor soundproofing using sound membranes. 6 %âãÏÓ 606 0 obj > endobj xref 606 21 0000000016 00000 n 0000001523 00000 n 0000001608 00000 n 0000001742 00000 n 0000001970 00000 n 0000002582 00000 n 0000003199 00000 n 0000003236 00000 n 0000003436 00000 n 0000003622 00000 n 0000003700 00000 n 0000003776 00000 n 0000005949 00000 n 0000006014 00000 n 0000006091 00000 n 0000006166 00000 n 0000008859 00000 n 0000009774 00000 n Find Revit and CAD files for STC and fire rated UL assemblies. Both these single-number ratings apply to the full assembly of building materials used to separate tenants, including floor/ceiling assemblies. When floor-ceiling assemblies are used to plot our UL floor-ceiling assemblies and fire-rated floor assemblies, you can ensure the accuracy of your next project. Key Floor Acoustic Ratings Explained. Find resources for UL assemblies with required STC and fire ratings to integrate into your construction project. Description STC IIC Sections Test # 2" Topping Slab Precast Concrete 14" Tee: 54: 24: AT001010: 4" Concrete Slab 1/2" Plywood 2" KINETICS RIM L-2-12 2" Topping Slab Can help achieve sound ratings when used as a part of a STC/IIC-tested floor/ceiling assembly. fire-resistance ratings for veneer and conventional systems –Can minimize or eliminate irregularities such as ridging, boarding and nail pops associated with standard drywall Resilient channels over wood studs break the vibration path, helping to increase sound transmission loss (STC). Mar 23, 2017 · – Minimum STC Rating of 50 for wall and floor/ceiling assemblies separating dwelling units • Requirement is reduced to 45 if field tested in accordance with ASTM E90 – Minimum IIC rating of 50 for floor/ceiling assemblies separating dwelling units or between a dwelling unit and a public or service area • Requirement is reduced to 45 if Mar 21, 2021 · The delta IIC doesn’t depend on the floor assembly used during the manufacturer’s lab tests. 2 ROCKWOOL Rated Roof Assemblies Catalog Notes: STC 37 RWT32 Using this guide: All assemblies include component descriptions, STC, OITC, Rvalue, and Rainfall data (if available). Fire rating per UL L502; STC 58 and IIC 73 per California Office of Noise Control Assembly 2. Department of Housing and Urban Development (HUD) provides information on housing policies, programs, and resources. 4. I have been informed that we are going to be required to achieve an STC-50 rating minimum on the floor assembly. Fire rating per GA WP 3380. 875″ has an STC rating of 41 and an IIC rating of 25. Fire rating per UL L518; STC 58 and IIC 54 per National Evaluation Service Report NER-200. * The field test evaluates the dwelling's actual construction and includes all sound paths. Identify layer details and available products. Impact noise, tested on floor-ceiling systems only, is reported as the Impact Insulation Class (IIC). It contains STC (Sound Transmission Class) or HC (Impact Insulation Class) ratings for approximately 500 different construction assemblies. A wall assembly with an STC 70 rating, for instance, indicates a high level of sound insulation. c. Fire and STC ratings per GA FC 5012. STC and IIC ratings for floor assemblies (Sabourin, 2015). 12 of the LABC %PDF-1. The installed weight of concrete masonry assemblies can be determined in accordance with CMU-TEC-002-23 (ref. com. 6. 3, this analysis procedure is based on comparisons of data from floor/ceiling assemblies having STC and IIC ratings as determined by the test procedures set forth in ASTM Oct 8, 2021 · Gypcrete/soundmat mfgs have tested assemblies. 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. 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. 1(3) assembly 21-1. It should be expected that carpet and pad will significantly increase the overall performance of the sound control system. Fire Ratings are assigned to entire floor/ceiling and wall assemblies – not to individual product components of those systems. The most common acoustic properties that determine these ratings include: Nov 7, 2016 · High STCs may also be achieved by using a vinyl barrier (such as mass loaded vinyl) in the wall to improve soundproofing performance, especially with metal stud wall assemblies. Sound Control For A Purpose Just like many other characteristics of a structure that can be optimized for the benefit of its occupants, better Catalog of STC and IlC Ratings for Wall and Floor/Ceiling Assemblies RussellB. SoundBook Floor-Ceiling IIC Rating Calculator. 3 of the 2021 IBC states the following: “Floor-ceiling assemblies between dwelling units and sleeping units or between a dwelling unit or sleeping unit and a public or service area within the structure shall have an impact insulation class rating of not less than 50 where tested in accordance with ASTM E492, or have a Normalized May 19, 2023 · Adding more insulation can have a profound effect on a wall assembly’s STC rating because it adds sound-absorbing material to the assembly. to have Sound Transmission Class (STC) ratings and Impact Insulation Class (IIC) ratings of 50 as shown. The STC rating is the total frequencies divided by the number of tested frequencies. In the following 13 commercial wall systems, ROCKWOOL AFB® delivers In 1961, STC was introduced as the method for comparing various wall, ceiling, floor, door, and window assemblies. When using Section 1206. Sound Ratings Gypsum board assemblies are laboratory tested to establish their sound attenuation characteristics. Sound transmission class (STC) and Impact insulation class results are given as well as the following detail data at ⅓ octave band center frequency ranging from 125 Hz to 4000 Hz: TL / STC: Floor Layer Estimated Transmission Loss This is where the Sound Transmission Class (STC) rating comes into play. Increases STC rating 6-15 points over bare wood frame system. ) 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. For impact noise, the minimum laboratory rating is 50-IIC (45-FIIC if field tested). Acoustic ratings define a flooring system’s ability to block noise. May 6, 2024 · Resource Alert: Find IIC and STC ratings for floor-ceiling assemblies on pages 103–108 of The SoundBook. They may be used to meet the acoustically rated construction requirements stipulated in Sections 1206. Resilient channel can improve the STC rating of an assembly. STC ratings commonly range between 30 to 75+ and are largely dependant on the type of materials used in the assembly and the care taken in construction. 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. It should also be a consideration for single family homes. The STC value The U. 1-hour floor/ceiling assembly with floor trusses and lightweight concrete topping; STC rating of 61 to 62. The QuietWalk underlayment provides very high ratings such as IIC of 71 and STC 66 as of mid 2018. Address: 6301 N Florida Ave Tampa, FL 33604 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. Apr 14, 2022 · For example, if you have a wall assembly with an STC rating of 33, you can’t add a later of MLV with an STC of 26 to result in a wall with an STC of 59, it would be more like 39. contributions of various products to an STC or IIC rating are shown in Table 18. In general, a higher STC rating blocks more noise from transmitting through a partition. 9 mm Type X gypsum Oct 22, 2021 · The mass of the structure is what contributes to the STC value. The world's most comprehensive collection of sound-tested, fire-rated assemblies. Fire Resistance Inherently fire resistant throughout and provides fire resistance as part of fire resistance–rated wall and floor/ceiling assemblies. This is flattering for an underlayment’s advertisement but not explicit of its sound insulation performance. Use 440 SoundBarrier in tested and approved fire rated floor and wall assemblies that carry the UL (Underwriter’s Laboratory) hourly ratings. Catalog of STC and IIC Ratings for Wall and Floor/Ceiling Assemblies, California Dept. ROCKWOOL 1 HOUR & 1. Disclaimer: All Ratings Are Not Equal As with any underlayment sound testing number that a company gives you, each subfloor or floor assembly in your home. Dec 3, 2024 · Similar to IIC, STC testing involves testing 16 frequencies between 125 Hz and 4,000 Hz. com pblised reslt. Upgrade Your Floor’s IIC Rating With Solutions From Soundproof Cow. the floor needs to have a 1 hour separation so im adding sound batts and (2) layers 5/8 typ 'X' g. J2247-13-303-11-R0 Insulation Included some floor coverings and there are no sound tests when adding an additional layer of wood to the assembly . SoundBook Gridstone Ceiling Attenuation Guide. Airborne sound ratings of floor/ceilings assemblies require a minimum laboratory-derived rating of 50-STC (45-FSTC if field tested). 10mm wood floor, 2mm closed cell foam, 1½ in. STC Ratings are: based analysis approach for deriving STC and IIC ratings for assemblies constructed with wood and wood-based framing. LIGHTWEIGHT CONCRETE The second choice for achieving a one hour fire rating in most UL Designs is to pour lightweight concrete directly to the wood subfloor . The IIC and STC is conducted at a laboratory where flanking is controlled. • with or without absorptive material • 1 layer of gypsum board on each side • Single Row W1a W1 with • 89 mm thick absorptive material(6) • 15. Buildings looking for LEED credits must have a minimum STC for floor/ceiling assemblies. Adding additional layers of drywall can improve the STC rating of an assembly. Things like stud spacing will change the rating. This is a UL U419 wall, so its STC rating is 50. All tested assemblies will aciee a minimm of te maxxon. 5. 5” Acoustics Assembly Number: ISS-00 STC: 43 OITC: 28 Report No. (essentially RC 2601) The building inspector is telling me this assembly is unacceptable unless I can prove the stc is 50 includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. 2. ASTM E 119 fire test on wall assembly Detail WS4-1. STC rating per California Office of Noise Control Assembly 1. I don't know what the as-drawn assembly would be rated at and whether we will need to add a 3/4" layer of gyp on top of the decking to achieve that rating. STC is highly dependant on the construction of the partition. elements of buildings, the fire-resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance-rated walls, ceiling and floor assemblies. Option for wood structural panel sheathing. PDF. Entertainment Room/Music Room Sound Control is an important design consideration for both commercial and multi-family projects. 2) for laboratory testing or ASTM E413, Standard Ideal for luxury developments and assemblies with exposed ceilings. Consult Maxxon for a full description. 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. Jun 24, 2014 · Thanks to product technology improvements and more stringent regulations, the wood-frame multifamily industry is paying increasing attention to the acoustics of the floor/ceiling assembly. As such, components are typically added to mass timber assemblies to improve their acoustics. rubber membrane 56 48 AISC DESIGN GUIDE 37 / HYBRID STEEL FRAMES WITH WOOD FLOORS / 43 Fig. Topping Depth Encapsulated Sound Mat Floor Covering* Sound Rating Maxxon UL STC** IIC Test Number Fire Ratings 10" Yes Yes 5/8 A reference guide for acoustical assemblies and STC ratings in insulation systems, commercial roofing, and engineered products. L. Examples of exterior wall-floor intersection details for Type III construction are also provided. STC is calculated by taking the Transmission Loss (TL) values tested at 16 standard frequencies over the range of 125 Hz to 4000 Hz and plotted on a graph. 7 Min. In addition, Each assembly references an RWT (ROCKWOOL test) number. On top of that, the manufacture of the floor covering can use different materials. An introduction to key terms, strategies and noise attenuation assemblies 1. What is Outdoor-Indoor Transmission Class? OITC is a newer rating system designed to measure how well a roof assembly, wall assembly, window or door inhibits outside noises from coming inside. This information is located beneath the thumbnail image of the assembly. However, it is important to have some understanding of generally accepted acoustical terms when talking with architects, specifiers, designers Feb 9, 2021 · details of tested assemblies, along with corresponding STC and IIC sound ratings for floor/ceiling assemblies. 2 and 1206. , Sound, Noise and Vibration Control, 1978. Metal stud walls perform better than wood stud walls. w. These include the finish floor, the substrate, and the ceiling system below, in addition to your choice of sound mat or soundproofing underlayment. Consult listed ˛re references for speci˛c gypsum board type and brand to obtain listed performance. 3. The same code states that floor/ceiling assemblies between dwelling units or to have Sound Transmission Class (STC) ratings and Impact Insulation Class (IIC) ratings of 50 as shown. 1-hour floor/ceiling assembly with I-joist floor framing, lightweight concrete topping, carpet, and resilient channels. Products Applications Design The SoundBook® is the industry’s leading resource for technical details and sound-rated assembly drawings – all in one place. While decibels (dB) are a measurement of how loud a noise is, sound transmission class measures the difference in decibels through a product — in other words, how much sound is Air-borne sound insulation for wall and floor-ceiling assemblies shall meet a sound transmission class (STC) rating of 45 when tested in accordance with ASTM E90. Find resources and details for UL rated floor & ceiling systems with the required STC and fire ratings for your project. . based analysis approach for deriving STC and IIC ratings for assemblies constructed with wood and wood-based framing. 1½ in. STC ratings are used in both floor and wall assemblies. Actual ratings may vary based on project variables. 1-hour interior staggered stud partition wall assembly with STC 53. 1 at 100% design load after one hour of fire exposure. rubber membrane The total STC rating isn't just a combination of it's parts, they are tested as a full assembly. –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. The STC value is a measurement of the ability of a floor/ceiling to reduce the transmission of airborne noise such as voices. 11 of the LABC. J2247-13-303-11-R0 Insulation Included Wall Assemblies; Floor-Ceiling Assemblies; Fire Rating: 1 hours: System STC: 1 layer 1" Thick Levelrock® Brand 2500 Series Floor Underlayment; 3/4" Thick UBC requirements for walls: STC rating of 50 (if tested in a laboratory) or 45 (if tested in the field*). 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 STC values are further improved by using Johns Manville sound control batts to increase sound absorption within the floor/ceiling assembly. Conference Room/Classroom 2. Find Floor & Ceiling Revit and CAD files for STC and fire rated UL assemblies. Increases IIC levels up to 17 points over wood frame, and up to 25 points over concrete. Address: 6301 N Florida Ave Tampa, FL 33604 Class (STC) rating. Sound ratings are not the same as fire ratings where you need to follow the exact products from the UL assy submitted to plan review to meet code. 3. board and stud masses. Mar 4, 2020 · CHARLOTTE, NC (March 4, 2020) - National Gypsum Company has introduced SoundBook 2. As a start, you can check out some published documents like the Soundbook from National Gypsum or Owens Corning's sound design guide. STC ratings in the 60’s or 70’s on Sound Control Underlayment product data sheets indicate that a ceiling assembly was used in the testing and the ratings noted should be viewed with skepticism. of Health Services, Office of Noise Control, Berkley, CA. Wood-framed construction noise control products, stc ratings, iic ratings. Insulation will noticeably improve the STC rating of an assembly. includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. Truss Depth per UL Insulation Resilient Channel Drywall Min. 1. Note that you don't need to follow any listed assembly to get permitted for STC/IIC requirements (there aren't really "listed" assemblies for sound). Find lab tests with IIC and STC Ratings for Soundproofing Products and Flooring Underlayments for your Commercial project. 10 and 1206. STC ratings quantify how well a wall can reduce airborne sound transmission, including voices, music, and other typical household sounds. Yerges, Lyle F. For improved sound reduction, lightweight concrete is used on the floor; 38mm thick standard lightweight concrete of 960–1440kgm –3 , and 20mm The performance level indicated is based on good acoustically designed and constructed wood frame assemblies with traditional components utilized. The higher the number, the better the floor/ceiling assembly. When STC tests are performed, the TMS 0302 requires the testing to be in accordance with ASTM E90, Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements (ref. STC Wall Rating Chart. 1 •Or use the calculated method in IBC 722 •Use of Structural Composite Lumber •Manufacturer’s ESR shows equivalent fire performance to solid sawn Shallow Floor Depths • 1” gypsum underlayment • 19/32” WSP • 3 ½” Fiberglass Batt 1-hour floor/ceiling assembly with solid sawn floor joists, gypsum concrete topping, carpet, and resilient channels. Feb 16, 2024 · STC Ratings: Wall Wisdom. Single-number rating that indicates the amount of impact noise isolation provided by a floor/ceiling assembly. 12 of the LABC Fig. 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. Sound Transmission Class (STC) indicates how effectively a floor assembly reduces airborne sounds such as voices and music. STC and IIC ratings must be 55. Insulating wall cavities noticeably improves sound transmission loss by providing cavity absorption. 3, this analysis procedure is based on comparisons of data from floor/ceiling assemblies having STC and IIC ratings as determined by the test procedures set forth in ASTM SoundBook Floor-Ceiling Assemblies. IIC Rating Calculator. Installing insulation within a wall or floor/ceiling cavity will improve the STC rating by about 4-6 dB, which is clearly noticeable. This article will address multiple aspects that affect the sound performance of your Trus Joist® floor system and demonstrate how sound performance can be improved. 10). floor/ceiling assemblies was compiled from to enable the user to quickly find a group of laboratory test reports submitted to the Cali- construction assemblies having similar fornia Office of Noise Control by various sound transmission characteristics. Our high-quality underlayment products turn your floor’s IIC rating from mooo-diocre to marvelous. Corporate Brochure; 1" Oak Hardwood Floor 3" Subfloor : FIIC 15: AT001033: Dec 7, 2023 · STC ratings are a standard way to rate the effectiveness of an assembly to attenuate airborne sound. assemblies: •Shallow Floor depth •Use prescriptive assemblies: IBC 721. b. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. ROCKWOOL Comfortboard® 80 has recently been tested and approved for use in i-joist floor-ceiling assemblies that are required to meet a 60 minute and 90 minute fire rating. S. As required by IBC Sections 1206. SoundBook Roof-Ceiling Assemblies. 4. Therefore, flooring materials do not significantly reduce the Sound Transmission Class (STC), which is a rating of airborne sound transmission loss of the floor/ceiling assembly or the partitions. How Are These Ratings Obtained? 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. Apr 4, 2023 · Critical Floor Underlayment Properties. The information has been accepted in principle by the relevant technical committee of the National Building Code and will be published as a table Bare mass timber floor/ceiling or wall assemblies are seldom used, in large part due to inadequate acoustical performance. Fire-Resistance Rating(2)(3) Typical Sound Transmission Loadbearing Non-Loadbearing Class(2)(4)(5) • Wood Studs W1 • 38 mm × 89 mm studs spaced 400 mm or 600 mm o. Downloads. Understanding the STC ratings for floors is essential when designing a space that requires soundproofing, such as an apartment building or a commercial space with multiple floors. 0™, the industry’s most comprehensive resource for technical information and detailed architectural drawings of sound-rated assemblies for architects and contractors seeking to achieve required Sound Transmission Class (STC) ratings on their projects. In addition the Sound Transmission Loss (TL) and Impact Sound Pressure Level (ISPL) data values for each test are plotted on graph paper at a standard scale. Email: info@commercial-acoustics. DuFree Office of Noise Control, California Depurtmenl of lleahh Services Berkeley, California 94704 Inlrofluetlon building codes, This catalog of sound-rated wall and The purpose of Ihe indexing system is A floor/ceiling assembly achieves a STC of 50–55 with insulation between the trusses, 16mm Type X gypsum on the ceilings, and 16mm plywood covered with 38mm of lightweight concrete on the floor. 1-hour floor/ceiling assembly with I-joist floor framing, gypsum concrete topping, carpet, and resilient channels. Because lightweight concrete shrinks when it cures, a minimum of 1-1/2 in . 5 HOUR FIRE RATED I-JOIST ASSEMBLY LISTINGS . Jun 15, 2024 · A basic wood structure floor/ceiling typically has an STC rating of 40-43, while a six-inch concrete sub-floor has a rating of 52-55. Specific STC ale of te tested assembl listed in te correspondin sond test. 4-8. Sep 18, 2015 · Sound transmission through floor/ceiling assemblies is essential when designing for multi-family housing, hotels, and mixed-use occupancy. 1 Fire-resistance-rated Floor/Ceiling Assemblies: 4. STC 43 Assembly Components Finish material 5/8” Gypsum Size 2 1/2” Steel Stud Spacing 16” oc Product AFB Thickness 1. May 1, 2000 · As a result of this project and the related acoustics project, a table with STC ratings for more than 600 floor assemblies and fire-resistance ratings for more than 150 floor assemblies was drafted. Penetrations or openings in construction assemblies for piping; electrical devices; recessed cabinets; bathtubs; soffits; or heating, ventilating or exhaust ducts shall be sealed Floor Blokker – Sound Mat Specifications • Approved for all UL L500 Series • 1/4″ thick (6mm) EVA membrane with polyester scrim is the ideal composite floor underlayment for combined STC and IIC performance Oct 10, 2024 · If the window has an STC rating of 30, the final STC with the addition of the blanket is not 65. Provides both STC and IIC ratings above 60 in specific floor-ceiling assemblies, making it a best-in-class solution by reducing sound two times more than the code requires. A “strong” floor assembly means a better STC and IIC rating. FIRE RESISTANCE RATING DESIGN NUMBERS What is STC? The Sound Transmission Class (STC) is a single-number rating of an assembly’s ability to resist airborne sound transfer at the frequencies 125-4000 Hz. 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. When the mass of a barrier is doubled, the isolation quality (or STC rating) increases by approximately 5 dB, which is clearly noticeable. 10 of the LABC) is to be used for acceptance of individual jobs only. 2-hour metal stud fire wall assembly per GA WP 1548 with wood stud bearing walls on either side. 5. U. Sound Transmission Class (STC) A single-number rating that indicates the sound transmission loss of a partition or ceiling system between adjacent closed rooms. For example, a 5-ply CLT floor with a thickness of 6. Other assemblies may be used provided that they comply with the requirements of Section 1206. Sep 28, 2022 · Provides high STC and IIC ratings when tested as part of a floor-ceiling assembly by an independent third-party acoustical laboratory using ASTM E90 test procedures. In addition to the fire rating, these assemblies DISCLAMER: The type of gypsum board mentioned in the construction description re˚ects the type of board used in the acoustic test reports. 2. The result is a numerical rating somewhere between 25 and 60+. For more than 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. Airborne sound insulation is reported as the Sound Transmission Class (STC). Impact Insulation Class (IIC) measures how well a floor assembly blocks impact noise like footsteps and dropped objects. STC is a standardized measure that rates how effectively a building partition, such as a wall or floor, can block airborne sound. Staggered or double stud walls are higher rated than single stud walls. It has a 5/8″ type-x gypsum board on both sides, sound batt insulation and is made using 6″ metal studs. 1 1-hour and 2-hour Fire-resistance-rated Floor/Ceiling Assemblies: The 1-hour fire-resistance-rated floor/ceiling assemblies shown in Figures 6 through 9, and the 2 fire--hourresistance-rated floor/ceiling assembly shown in Figure10 , are based on UL designs. Those lab tests generally use floor assemblies that are “under steroid”. Phone: 888-815-9691. A 6” solid concrete slab, for example, has an STC rating of about 52. There are a number of factors that determine the Impact Insulation Class, or IIC, of your floor-ceiling assembly. In the examples below (figures 6 and 7 in The SoundBook), going from an uninsulated wall to an insulated wall boosts the STC rating 8 points. The higher the STC rating, the better the material prevents sound from passing through. The specified rating of 45 for field-tested assemblies (noted in Section 1206. An IIC and STC rating will generally be 5 points higher than a F-IIC and F-STC rating. Aug 29, 2016 · Section 1207 of the 2015 IBC states that wall and floor/ceiling assemblies separating dwelling units must meet a Sound Transmission Class (STC) rating of 50, or 45 for field tested assemblies (tested in accordance with ASTM E90). Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire-rated ceiling assembly. 1. Dec 18, 2023 · Above is another example of a factory wall. UBC requirements for floor/ceiling assemblies: STC ratings of 50 (if tested in a laboratory) or 45 (if tested in the field*). Cavities filled with 4. An example calculation is given in Table 18. precast concrete, ½ in. Fill out the form below to begin your download. vjegp aplssd jphrhn esns wtq xrcjp qdhkar cxtvai urzsa xfyi wlppxi nctpxonc wxhqu rvgipwc wjlnx