Glass stc rating chart pdf Fire Rating . Even if the glass is damaged, it remains securely in its frame, keeping the elements outside. 24 Page 1 of 7 Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers STC RANGE 25 - 35 Roof Membranes Unless otherwise indicated, all tests have been completed to be membrane agnostic. Riot Glass® is a full line of ballistic glass available in single and dual pane options. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. 3°F/5. These STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Glass 2 4-3/4" (120. 030" P. Heavier glass and/or different glass thicknesses can be used in lieu of standard glass for a higher reduction of sound. 7°C ® Super Spacer® TriSeal™ +14. Pim Foam or Dura**** Operating Style Series Numbers Glass 1 Glass 2 Spacer STC File Name: STC Ratings - Tuscany | V400 Due to 1206. annealing float glass is the process of controlled cooling to prevent residual stress in the glass and is an inherent operation of the float glass manufacturing process. The STC and ISO RW values indicate the acoustical performance ratings, with higher numbers indicating better sound Acoustical Guide – Determining Minimum STC Rating Methods for Determining Required Window STC Rating The three methodologies discussed below for determining the minimum required STC of windows are identical in format. House brick rendered both sides (13mm (1/2") PDF-1. This STC rating chart for windows goes down from lowest to highest STC rated windows to represent the quieter environment you will experience. 22. STC ratings are a logarithmic scale similar to the earthquake Richter Scale, which means each escalating number is significantly higher in performance than the previous number. Our spec sheets offer a detailed look at individual products, and include information on product features, options, and performance data. Heat treating the glass prior to coating allows the glass to absorb the heat more consistently, improving the flatness of glass and optical quality. OITC Rating. Glass size and glazing system will affect STC rating. 50003 659. Factors That Affect Your Glass STC Rating. This performance data is not a commitment for Cardinal to produce. The greatest lower ing (2 to 8 STC units) was for assemblies with a single layer of 5/8” Type X gypsum b oard on each side of thee steel stud assembly. 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. May 30, 2024 · STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. 250 7/8" 3. Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. 6. Long Term Performance Thermal Batt Insulation is dimensionally stable and will not slump within the wall cavity. • UV stabilized to resist solar exposure • Manufactured in USA • 5 year Manufacturer Warranty • NOT Fire-rated • Acoustical ratings: 1/4” = STC 29 1/2” = STC 34 1/4" Tempered Glass 1/4" Tempered Glass 1/2" Air Space 1/4" 1/2 glass wool 590lb/ft2) 55 59 Single 150mm (6") Steel stud with 3 layers of 13mm (1/2") plasterboard on one side and on the other side another 3 layers on a flexible channel screwed horizontally onto the steel stud. 125 x 47. Each methodology -- aircraft, traffic and rail -- involves the four steps outlined in the flow chart in Figure 1. Outdoor-Indoor Transmission Class (OITC) – applicable to exterior walls (including doors and windows) where the glass configurations. (Insulation is 125mm (5") glass wool 590lb/ft2) 55 64 Standard house brick unrendered. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. All performance data is calculated using LBNL Window 7. OITC, on the other hand, covers a broader frequency range (80 to 4000 Hz), including lower frequencies often associated with external noise. Pella. 24 Page 1 of 2 Due to continual product research and development, details listed are subject to change at any time This rating is especially important to architects since it can have the largest impact on building performance. Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. Glass size and glazing system will affect STC rating. 24 Page 1 of 7 Jan 18, 2022 · STC Ratings Updated : 01/18/2022 by K. 4°C 0. Even if the glass is damaged, it remains securely in its frame ordinary glass • Unlikely to shatter or chip when bombarded with thrown rocks, bricks or bottles. com V250-FW-1 250 Series Fixed Frame Windows Product Selection Guide Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. 1°C Aluminum 37. Dec 22, 2022 · Double-glazed glass can also provide an STC rating of up to 40. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. -1/4" (total 1/2" thick), 1/4"-0. 3 software and represents center of glass performance data. An STC rating is an instrument measurement of how much noise is stopped. 250 Series Casement Location 6601 NE 112th Court Vancouver, WA 98662. Standard windows offer sound control up to an STC rating of 30. 29W b D3s trcQ C6 MKETIG@ STC ratings are determined in a laboratory under controlled conditions. Actual values may vary due to production tolerances. This rating can be considered the baseline from where you are getting serious when it comes to preventing some transmission. Click here to review the full details. 800-782-5742 Talk to an expert! Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. Sound Transmission Class Sound Transmission Class (STC) is a single-number rating system that assigns a value to a product to indicate how well that product insulates against unwanted noise the Sound Transmission Class (STC) and Outdoor-Indoor Transmission Class (OITC) Ratings. The STC (Sound Transmission Class) rating is a single-num ber rating system for interio r build ing partitions and viewin g windows used to catego rize acoustic performanc e. Glass siz e and glazing system will a˜ect STC rating. Call us with any questions! The performance data below applies to an insulating unit constructed with two plies of glass and an air or argon filled space. The table compares laminated glass against the performance of non-LG configurations. Call: (360) 334-4107 Performance documents for altitude limits, NFRC ratings, center of glass, joining window load table, air infiltration, and more. . 3°F/-2. NWTL140828-03 STC 40 Assembly Components Finish material 1/ Oldcastle STC Data (1) The data here is based on samples tested at Riverbank Acoustical Laboratories in accordance with ASTM E90- 97, ASTM E413-87 and ASTM E1332-90 and are not guaranteed for all samples or applications. In the fi eld, fl anking noise, quality of material and construction practices can lead to widely varied STC’s for the same assembly. What does an STC rating of 45 mean? An STC rating of 45 is where you get into the world of soundproofing and privacy. com LS-DH-1 Lifestyle Series Double-Hung Product Selection Guide glass areas but not enough to make much difference in the majority of architectural glass sizes; > Sound reduction will improve with the use of Acousta™ laminated glass due to the vibration dampening effect of the interlayer. For windows, STC ratings range from 18 to 38. 250: 7/8" 3. not found with glass partitionsAcoustical control. Typically a two (2) or more point change Technical Glass Guide Update 6/15/21 – Version 3. STC/OITC: G3302. 12 of the LABC. Assemblies will be organized by STC value ranging from an STC of 40 to an STC of 57. 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. *OITC is estimate d base d on this test. The order of sound insulation performance from poor to excellent is: monolithic glass < laminated glass How to calculate the glass STC? One of the features of glass is sound proof,whether it's single glazing, laminated glass,insulated glass or even laminated ins Bookmarks are also included in this PDF document and are available as an additional navigation option. Laboratory testing is used to measure the resistance of partitions such as walls, windows, or entry doors to the passage of sound. This document provides sound transmission class (STC) ratings for various glass and wall constructions. The fire door rating measures how long a door can prevent the passage of flame from one side of the door assembly to the other. Be sure to specify full thick - Feb 19, 2024 · Explore the STC rating chart for walls, glass, windows, doors, and materials. 2 x 4 beam traveling at 34 miles per hour, followed by hurricane-force winds. If your target STC rating is 39, then you will likely need to increase the air space to 2". 10 of the LABC) is to be used for acceptance of individual jobs only. QINGDAOMORNBUILDINGMATERIALSCO. 05: Water Resistance. STC Lab Test Results 1/8" single pane glass Tested at various air spacing between the test glass and a Soundproof Window 27 STC Test Glass - STC Test Result Range: 43 52 40 50 60 70 T ransmission Loss (Db) SOUNDPROOF WINDOWS®, Inc. 1-7/8" overall - 1/4" glass, 1/2" airspace, 1/4" glass, 1/2" STC. In general, a higher STC rating blocks more noise from transmitting through a partition. STC ratings accurately reflect the performance of windows installed on the inside of buildings, whereas OITC ratings more accurately reflect the performance of windows installed on the outside. TD-138 - Heat Treated Glass for Architectural Glazing Solid Glazed Wall STC Rating 3/8" Clear Tempered Glass 36 1/2" Clear Tempered Glass 38 Double Glazed STC Ratings Muraflex Double Glazed solid walls scored industry standards: Solid Double Glazed Wall STC Rating FINO 3/8" Tempered Glass & 1/2" Laminated Glass 43-46 MIMO 3/8" Tempered Glass & 1/2" Laminated Glass 43-46 Glazed Assemblies STC Ratings • SL45 with STC 40 laminated glass has an STC of 36. 45 – 50 psf: Products with Impact-Resistant Laminated Glass. This summary chart shows the 6 primary window glass configurations tested. Variations could affect the STC rating of the opening Bookmarks are also included in this PDF document and are available as an additional navigation option. 250 Series Double-Hung. -1/8" (total 3/8" thick), 1/4"-0. Rev. 06 m W* n 0 792 612 Find technical specifications, installation instructions, construction specifications (CSI), CAD/BIM files and parts manuals for all Marvin products. Miscellaneous. OITC Rating with grilles-between-the-glass Jan 28, 2025 · However, it is important to note that different glass options and the use of combination units may affect the sound abatement performance of the unit. Both STC and OITC ratings inform your window or door selection based on sound insulation Dec 8, 2023 · Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. Fortunately, there are some tools we can use when we choosing the suitable glass types we need. Typically the material with the lowest resistance to the passage of sound has the greatest impact on a partition's STC value. The STC rating Pella 2024 Architectural Design Manual Division 08 Openings Windows and Doors www. STC Results Chart. RAL-TL06-199 The acoustical tests were conducted in accordance with the following: OA Glass 1 Glass 2 Acoustical Ratings - Ultra I C650 updated 04. It is a non-linear scale. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Quite simply, the higher the rating, the better the product. Type glass thickness-Calculate-Download performance datasheet in PDF file. 5” Acoustics Assembly Number: ISS-02 STC: 43 OITC: 28 Report No. 5°F/1. Therma-Tru offers a wide selection of fiberglass 20-Minute Fire-rated doors for protection with a sense of style. 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 float glass (also called “flat” glass) that has not been heat-strengthened or tempered is annealed glass. B. STC Rating. V250-SW-2. Double-Glazed components. It’s important also to consider: Glass thickness: thicker glass typically provides better sound insulation than does thinner glass Optimum Humidity Chart 160. Additional Technical May 14, 2021 · It is hard for us to know how much DB noise has been blocked during transmission. Two common acoustical rating systems are: Sound Transmission Class Rating (STC) – applicable to interior building partitions and viewing windows where the sound source is human speech and/or office equipment. 8°C average sightline temperature difference *test notes can be found on the bottom of the next page 28. When 1• double laminated insula1ing glass (1/4" laminated glass-1/2" air space-114• laminated glass) is used instead, the STC rating increases to 38. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. Of course, the higher the STC rating, the better. A rating of 40 would likewise correlate with a volume reduction to approximately 1/16th of the original level (1/2)^4 = 1/16). This represents a sample of possible GLASS [PB] CLEAR EC [L] EC [L] EC [L] EC [L] Ec+ [L70] Ec+ [L70] Ec+ [L70] Ec+ [L70] Thermal Performance Ratings* - NFRC Certified (Page 2 of 6) Please Note: For -Estimated STC Ranges should be adequate REPRESENTATIVE STC RATINGS Considerations for additional performance More air gap between windows Caulk or seal prime window Special weather-stripping for storm window Single Glazed ¼” Laminated Glass 41 - 45 Single Glazed 3/16” Laminated Glass 40 - 44 Single Glazed 1/8” Glass 31 - 37 Jun 15, 2024 · STC Ratings for Windows and Glass. 03. com. Laminated & Double-Glaze Combinations. Costing more than other materials, this is used mainly for exterior applications. 250 Series Sliding Window. Due to its inorganic nature, Thermal Batt Insulation will not rot or mildew* and is noncorrosive to steel, copper, and aluminum. 1. To determine the specifi c STC ratings of glass and a window or door assembly, the following ASTM standards should be used: • ASTM E 90 - 90 Standard Test Method for Glass 3 Spacer STC OITC Test Date Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. Each configuration was tested by itself and then with the added Soundproof Window at 4 different air spaces (glass to glass measurements) shown to the right. Easy Installation E413-87 in an ac oust ical wall. 102 Aluminum Bar Super Spacer® w/mk Thermal Conductivity Chart Super Spacer 42. Argon fill is 90% and air fill is 100%. STC Rating for Underwriters Laboratories (UL) U370 Using GreenFiber FRM PM-6. 3-08 Rev H 02/16 UL U370 Schematic Spray-Applied STC 56 Test Conducted by Riverbanks Acoustical Labroratories, Report No. E413-87 in an acoustica l wall. It's particularly effective for interior partitions as it reduces the STC Rating Chart Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. Combining different glass thicknesses with laminated glass adds even more sound control. Discusses the acoustical properties of glass, methods of rating, such as STC and OITC, applicable standards and the relationship between glass and other glazing components in determining an overall rating. -1/2" (total 3/4" thick), panels caulked in place in single frame with wooden stops and glazing putty. F-SW-2. 9375mm 32: 26 Hurricane Shield Series STC Rating OITC Overall Glazing Rating Thickness Exterior ; Glass Thickness Interior Glass Thickness Sliding Window – Dual-Pane Standard Insulating Glass; 59. • WD65 with STC 38 laminated glass has an STC of 36. 05-113-11-R1 Rainfall: G3302. STC 43 Assembly Components Finish material 5/8” Gypsum Size 3 5/8” Steel Stud Spacing 16” oc Product AFB Thickness 3. Values are center of glass calculated using LBNL Window 7 per NFRC100 conditions. FSC* 1/4" laminated glass & wood stops . WE STAND BEHIND OUR GLASS WinGuard® Aluminum products are backed by some of the best warranties in the industry, including: • A 10-year warranty on the frame and laminated glass unit • Limited lifetime warranty on the insulating glass unit A3000 Series Sliding Glass Doors (1) Restorations Series V5500 (1) STC Ratings (2)Zip file Installation Instructions (5)Zip file. In both cases, the higher the number the better the Transmission Class (STC) of walls and fl oor/ceiling assemblies. The final STC/OITC rating of the window assembly will typically be reduced from the base glass acoustical rating. The final STC/OITC rating of the window assembly could vary because of the influence of the framing members and the construction of the window assembly. Learn more. with grilles-between-the-glass by customer orders: cutting the glass to the custom sizes, applying print then heat treating the glass prior to applying a high performance coating. Learn why STC ratings matter for soundproofing. Old aluminum and wood windows are rated even lower. AGC Glass Configurator Single & Laminated Glass Data. 9375mm 32: 26 Hurricane Shield Series Laminating glass is a popular way to increase an STC rating. * Acoustical Performance of Glass and Wall Constructions. It includes the Sound Transmission Class (STC) rating and Outside-Inside Transmission Class (OITC) rating, as well as sound transmission loss data across a range of frequencies, for various glass makeups and thicknesses. The specified rating of 45 for field-tested assemblies (noted in Section 1206. • SL80/81 has an STC rating of 38 when using double insulated laminated STC 38 glass, and a rating of 45 when using double laminated STC 45 glass. Double-Glazed performance of the window frame, the fi nal STC rating of the window assembly could have no infl uence to a 3-point drop in STC ratings from the base glass STC rating. winds. *OITC is estimated based on this test. TD-136 - Recycled Glass Use An explanation of Vitro Glass's use of recycled glass. -1/8" (total 1/4" thick), 1/4"-0. Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically requires a combination of the two. 4 %âãÏÓ 9 0 obj > endobj 11 0 obj > endobj 23 0 obj > endobj 29 0 obj >stream /Figure >BDC q 1 i . • SL60 with STC 38 laminated glass provides an overall STC of 36. Pim Foam or Dura**** 3/32 3/32 - 28 23 4/19/99 TL99-145 Operating Style Series Numbers Glass 1 Glass 2 Spacer STC File Name glass constructions only. com LS-CM-2 Lifestyle Series Casement Performance Data Oct 16, 2023 · LAM LAM acoustical ratings not available for this glass combination vertical slider 6210 6211 6230 6230J 6270 net 47" x 59" STC 28-33-->--> X 32 29 04/11/23 TL23-161 acoustical ratings not available for this glass combination TL23-110 X--> X 30 28 04/26/23--> X 33 28 12/12/22 TL22-247 TL22-246 acoustical ratings not available for this glass Feb 18, 2022 · STC Rating of Fiberglass vs Rockwool (Which one insulates the best) Note: Here I will be going over which type of insulation material works best when put inside a typical interior wall with ½” of drywall on either side, which has an STC rating of 34 on its own, and how it increases this rating. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. 70 60 --STC38 Laminated architectural glass can be fabricated using various glass types, including low-e, clear, low-iron, tinted, reflective, patterned or wired glass to achieve desired aesthetics or to improve solar control and thermal performance. 08/31/2023 Ratings achieved at that size are representative of all sizes of the same configuration. The right-hand column shows the results of acoustical tests done on Fire Door Ratings. Implementation of the appropriate rating system is important because OITC and STC ratings are not linearly related, and the achievement of a strong STC rating does not necessarily correlate with a similar OITC rating. The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to Triple Insulating Glass Construction STC OITC This table compares Vitro Architectural Glass product performance data when assembled in a one-inch (25 mm) insulating glass unit with a ½-inch (13 mm) air space and two ¼-inch (6 mm) lites. Armorplast® and Riot Glass® ArmorPlast® is designed to resist penetration in UL752 Levels 1, 3 and 6. 5 psf: Design Pressure. STC Rating STC Rating Static Door Operable Door Perimeter Seals Door Bottom Threshold Panel w/ Gasketing 30 30 103N, 107N, 120N, 122N 420N 897NS 127N, 133N, 134N, 137N 137S, 303N, 700N, 700S 30 30 130S 225S 896S The STC rating is the average amount of noise stopped at 18 different frequencies, measured in decibels. The STC rating goes all the way up to 65. STC ratings are the ONLY way to accurately compare various noise reduction products. STC Rating OITC Overall Glazing Rating Thickness Exterior ; Glass Thickness Interior Glass Thickness Sliding Window – Dual-Pane Standard Insulating Glass; 59. Save as PDF 800 Park Drive , Owatonna , MN 55060 US | (800) 533-2080 Jun 16, 2023 · Both achieve an STC rating of 40, but higher ratings require a combination. The STC ratings allow accurate 'apple to apple' comparisons. To determine the specific STC ratings of glass and a -114• glass) with an STC rating of 34. Lab Proven STC Ratings May 6, 2020 · As a result it is not recommended for glass selection of exterior wall applications since the single-number rating was achieved under a specific set of laboratory conditions. See additional notes below data for specific Oct 10, 2024 · STC RATING CHART: STC: What can be heard at this level: 25: Soft speech can heard and understood: 30: Normal speech can heard and understood: 35: Loud speech can heard and understood: 40: Loud speech can heard, but not understood: 45: The threshold at which privacy begins: 50: Loud sound can be heard, but are very faint: 60+ At this level, good Check the STC rating chart above to have a better understanding of this. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. 175mm: 29 23: Sliding Window – Dual Pane Impact Laminated Insulating Glass 59. 15-113-11-R0 STC 31 26 STC 25 to 35 RWT31 RWT36 RWT30 STC Capability Chart. • Lifetime warranty on insulating glass component • 10-year warranty on laminated glass component Preferred Sliding Glass Door SGD5570 WinGuard® products can withstand repeated impact from a 9-lb. 175mm: 7. Our retrofit framing allows us to install the ArmorPlast® into your existing framing to significantly reduce costs and downtime. STC . Beyond the type of windows you select, other factors can affect the STC rating of your glass. The presence of low-e or argon have negligible effect on sound attenuation characteristics. S = Standard; O = Optional, (—) = Not available Performance Chart of Various Glass Configurations The purpose of this table is to help balance the individual needs of safety, aesthetics, thermal performance and other factors. 751 614 -426. One US glass manufacturer who has STC Rating Chart For Windows. 75 – 7. Acoustical Assemblies STC Rating Reference Guide. V. Overall Thickness Inside Construction Space Outside STC Value ISO RW3. V250-DH-2. Climate Pro B7700 Expanded Attic Coverage Chart Climate Pro B7600 STC Rating Documents. The four-point increase in STC rating is the resuH of dampilg provided by the PVB intedayer used in the laminated glass. 9°C Thin Gauge Stainless Steel 34. annealed glass can be cut, machined, drilled, edged and polished. Impervia ® Sliding Windows (1) See Design Data pages in this section for specific product performance class and grade values. 0°F/ 7. Even then, differences of 1-2 points STC can occur for the same assembly in the same laboratory. By providing the same contemporary look and feel as Acousti-Clear® Motorized and Automatic, Acousti- transfer at the frequencies 125-4000 Hz. 030 x 1/8” laminated has an STC rating of 34 1” insulated glass ¼” x ½” AS x ¼” has an STC rating of 35 Structural Performance The strength of laminated glass is determined by the glass thickness, type of vinyl, glass size, and the nature of loading. Meets or Exceeds AAMA / WDMA Ratings STC ratings are used for windows, doors, walls and most building materials. A higher STC rating translates into more reduction in sound. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. Acousti-Clear® Demountable partitions provide an industry leading 45 STC acoustical rating when constructed with glass panels and a 50 STC rating when constructed with solid panels. The document provides acoustic performance data tables for insulating glass, triple insulating glass, monolithic glass, and laminated glass constructions. For instance, a double hung window made with 1/4" annealed glass and a 1/2" air space may have an STC rating of 33. STC Ratings Updated: 08/19/2021 by K. Mass pigmented and decorative interlayers can also be used to provide a wide range of effects. 7 mm) 1/2" laminate 4", Air 1/4" laminate 51 51 Laminating glass is a popular way to increase an STC rating. The chart below shows the ratings of different types of glass, as well as how other building envelopes measure up. 501 re 306 396. Acoustical Guide – Determining Minimum STC Rating Figure 1. STC OITC 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 Class (STC) rating. 0 This guide provides an introductory overview of glass concepts and terminology, plus 1/4” (6mm) monolithic glass has an STC rating of 31 1/8” x . 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. ,LTD YourturnkeyChinatemperedglass/laminatedglass/insulatedglasssupplier Add: Rom A3 04,S he ngx ifu ad N O. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Trinsic I V300 updated 04. STC 30 if you live in an average area but want more privacy, STC 35 is the go to in louder areas, STC 37 if in a louder area and you want a luxury feel or you are pretty close to the airport or overlooking the freeway, STC 40+ is either you live in an area that is obnoxiously loud (seldom the case for single family housing) or you don't want to b atts w ith 8 9mm Fib er Glass (FG) b atts (with I-I single layer gyp sum each side) gave low er STC assemb ly performance for MW b atts. VT Door Types . In the following 13 commercial wall systems, ROCKWOOL AFB® delivers excellent fire resistance ratings and Sound Transmission Class (STC). 175mm 3. 3°F/2. 17. Glass size and glazing system will affect STC rating. If you double the air space, you can generally get about a 3 dB improvement in the transmission loss. Is Complete Soundproofing Possible? Our STC rating chart above only goes to 50 because STC rated windows are in that range. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500. lcdsl hcebmjef fnlrw nzvs zsqnn kvznoda dppdlxk hst edn ftqdb fzpsjsv inblwyiy fsord wwejv lgtt