Oitc rating chart pdf 2020. interlayer (where applicable).

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Oitc rating chart pdf 2020 Sound Transmission Class (STC) and Outdoor-Indoor Transmission Class (OITC): When tested to AAMA Specification 1801 and in accordance with ASTM E1425 and ASTM E90, the STC and OITC Rating shall not be less than: IR 501UT: a. OITC: Rw: 1/4″ RAL-TL85-169: 31: 29: 32: 1/2″ Structural Charts. UPDATED; TD-138 - Heat Treated Glass for Architectural 9. Document #/Rev. Oct 18, 2023 · Windows are typically the weakest part of a building assembly when it comes to acoustics, which is why you’d want to know the OITC rating. G. It uses a specific decibel (Db) range (80 Hz to 4000 Hz) which makes it a better measure for low sound frequencies such as road noise. 2020 Consumer Perception Study by John Burns Real Estate Consulting LLC. Sound Transmission Class (STC) and Outdoor-Indoor Transmission Class (OITC): When tested to AAMA Specification 1801 and in accordance with ASTM E1425 and ASTM E90, the STC and OITC Rating shall not be less than: a. STC rating determined in accordance with ASTM E 413. (2) The values shown are based on Canada's updated ENERGY STAR® 2020 initiative. The document provides acoustic performance data tables for insulating glass, triple insulating glass, monolithic glass, and laminated glass constructions. The STC rating has been in existence for many years and is based on speech sounds. Rev. Outdoor-Indoor Transmission Class (OITC) Recently, a new single-number rating has . SC: S. Outdoor-Indoor Transmission Class (OITC) • The measurement of sound transmission from the external environment into the building envelope • Testing uses ASTM E1332 Standard Classification for the Determination of Outdoor-Indoor Transmission Class • OITC includes a range of frequencies lower than the STC May 1, 2017 · Common SNQ values include Sound Transmission Class (STC) and Outdoor-Indoor Transmission Class (OITC). 24 Page 1 of 7 Due to continual product research and development, details listed are subject to change at any time Aug 8, 2022 · 4. 250 Series Sliding Window. 24: 57. Ratings derived from non-operable assemblies shall only be used for experimental purposes and are not part of this document. Outdoor/Indoor Transmission Class (OITC) - The OITC rating is used to measure the sound transfer between outdoor and indoor spaces. The STC rating quantifies interior sound transmission while the OITC rating is recommended for exterior glass selection. 9. 0. -Megan between OITC and STC? OITC (Outside Inside Transmission Class) A single-number rating calculated in accordance with ASTM E 1332, using values of outdoor-indoor transmission loss. Oct 14, 2014 · Sound ratings were developed by the American Architectural Manufacturers Association (AAMA) and the American Society for Testing and Materials (ASTM) to standardize the testing and rating of sound transmission for building components, particularly windows. The same process is used to determine STC ratings for doors. 12. Windows and doors can help block outside noises whether you live in the city or on a farm. com 5500 77 Center Dr. Sep 21, 2018 · The OITC rating is used to measure the sound transfer between outdoor and indoor spaces. 250 Series Double-Hung. For more information on the STC and OITC rating of Andersen® products, please view the Performance Grade and Air Infiltrations for Andersen® Products . * Impact windows with low-E and/or insulating glass as compared to single pane non-coated glass 2. Trifab ® 601/601T/601UT – 37 (STC) and 31 (OITC) 1. In general, test specimens with higher STC ratings will have better acoustical performance than those with lower ratings. Suite 100, Charlotte, NC 28217 PM-6. Others include the sound transmission class (STC) and the noise reduction coeffi cient (NRC). com www. What is Outdoor-Indoor Transmission Class (OITC)? OITC is a measurement that indicates the rate of transmission of sound between an outdoor and indoor space. 77” GAF" Polyisocyanurate 3Reduction in sound based on OITC ratings of Pella Lifestyle Series windows with triple-pane glass with mixed glass thickness to a single-pane wood or vinyl window with an OITC of 19. OITC Rating The Outdoor-Indoor Transmission Class (OITC) is calculated by subtracting the logarithmic laminated and insulated glass products can be used with relatively high STC ratings for indoor applications while also reaching high OITC ratings for exterior applications. 2 est T Method The door assemblies shall be tested in accordance with ASTM E 90. This rating is based on the difference between the overall A-weighted sound level of the sound spectrum given in Table 1 and the overall A-weighted sound level of the spectrum that results from arithmetically subtracting the transmission loss or noise Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. V250-SW-2. OITC. ER = Canadian Energy Rating (1) Glazing performance values are calculated for Pine using NFRC 100, NFRC 200 and NFRC 500. The OITC rating system is mostly consulted when there are low-frequency sounds involved between 80 to 100 decibels that can't be calculated by the STC rating. Sound Control Sell Sheet [PDF] SELECT ALL DOWNLOAD SELECTED. The first column is the rating of the door panel only; tested in a static inoperable condition to determine the sound transmission through the door. 85” GAF" Polyisocyanurate 2. interlayer (where applicable). com. 14 - 10logΣ f10((L f - TL f + A f)/10) (dBA Sep 14, 2021 · It is one of the most common sound ratings that plays an important role in soundproofing spaces and keeping your project up to code. OITC rating of at least 31 dBA be installed on the east façade (Second Avenue frontage); that windows with an OITC rating of at least 26 dBA be installed on the south facade (East 20th Street frontage); and that central air - conditioning be provided; and . The STC rating for a basic wood structure floor/ceiling is STC 40-43. TESTING Windows and doors put to the test. STC OITC Test Date Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. 28: 0. As with STC ratings, the higher the OITC number, the more sound resistant the product is. All sizes and glass types are tested for air/water/structural and impact-resistance. EZ LT 12 A 2 A 1 E 4 5 A A Component 800. F-FW-2. Acoustical Guide – Determining Minimum STC Rating Figure 1. Lepage offers a variety of acoustic glass with high ratings. (2) Not available for knock down frame. The presence of low-E or argon have negligible effect on sound attenuation characteristics. greenfiber. The OITC (Outside-Inside Transmission Class) rating is used to classify acoustic performance of glazing in exterior applications. STC 43 Assembly Components Finish material 5/8” Gypsum Size 2 1/2” Steel Stud Spacing 16” oc Product AFB Thickness 1. E413-87 in an acoustical wall. The chart below indicates the STC rating of specially made acoustic doors using various applications of gasketing. ] PDF-1. * * [The data and information set forth are based on samples tested and are not guaranteed for all samples or applications. The STC rating for a basic wood structure floor/ceiling is 40-43. and calculated in accordance with ASTM E1332 (1990). 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. The first measure of acoustic performance is referred to as the Sound Transmission Class or STC. *OITC is estimated based on this test. 175mm 3. 2 Test Method The door assemblies shall be tested in accordance with ASTM E 90. OITC Rating Outdoor Indoor Transmission Class (OITC) calculated by subtracting the logarithmic summation of the TL values The STC wall rating for a basic insulated 2×4 wall with a single layer of drywall on each side is STC 35-38. 751 614 -426. Innovation Credit 1 (Up to 5 points) Innovation Project teams can use any combination of innovation, pilot, and exemplary performance strategies to earn The STC and OITC rating measures a window’s ability to block sound transmission. with grilles-between-the-glass PEL-N-237-01042-00001 0. 21. The higher the OITC rating, the better resistance to sound Rating Outdoor-Indoor Sound Attenuation1 This standard is issued under the ﬁxed designation E1332; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. For example, if the transmitter played a sound at 60 decibels and the receiver picked up 30 decibels, the STC rating would be 30. 501 re 306 396. Glazing I. 50003 659. com V250-FW-2 250 Series Fixed Frame Windows 250 Series Fixed 3 Reduction in sound based on OITC ratings of Pella Lifestyle Series windows with respective performance package compared to a single-pane wood or vinyl window with an OITC of 19. OITC Rating The Outdoor-Indoor Transmission Class (OITC) is calculated by subtracting the logarithmic STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Trinsic I V300 updated 04. (OITC 37) STC (OITC 39) STC (OITC 39) For more information visit www. This sound rating increases to STC 42-45 with steel studs. N/A As the table shows, a single pane 1/4” annealed curtain wall window has a STC rating of only 31 and an OITC rating of 28. info@greenfiber. J2247-13-303-11-R0 Insulation Included frequencies used in STC ratings correlate in a general way with subjective impressions of sound transmissions for speech, radio, and television. 45 43 49 52 53 49 48 56 48 52 49 49 53 34 36 46 49 48 46 49 51 46 49 Outdoor to Indoor Sound Transmission Class (OITC) The OITC rating is typically applied to façades (exterior walls) and façade elements (windows and doors) exposed to transportation noises. Explore noise reducing windows and doors from Pella. (OITC 37) STC 46 pr. new way of measuring sound transmission, an OITC rating is The updated TMS 302 Sound Standard provides minimum requirements for rating masonry walls for sound transmission class (STC) and outdoor-indoor transmission class (OITC) based on calculation. Resource Alert: Find OITC and STC ratings for roof-ceiling assemblies on pages 111–112 of The SoundBook. 1): Jan 18, 2022 · OITC Test Date Test Number Intercept or Cardinal horizontal slider 6110 6111 6130 6130J 6170 size tested 6040---Operating Style Series Numbers Glass 1 Glass 2 Spacer STC File Name: STC Ratings - Style Line | V250 Due to continual product research and development, details listed are subject to change at any time. Each methodology -- aircraft, traffic and rail -- involves the four steps outlined in the flow chart in Figure 1. Download. 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. 1 This classification provides a single number rating for transmission loss or noise reduction data that have been measured or calculated. S = Standard; O = Optional, (—) = Not available The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to categorize acoustic performance. Here’s a look at what you be able to hear at each OITC window May 6, 2020 · Outside-Inside Transmission Class Rating used to classify acoustic performance of glazing in exterior applications. Vision. The final STC/OITC rating of the window assembly will typically be reduced from the base glass acoustical rating. com SPCC070 Kawneer reserves the right to change configuration without prior notice when deemed Jan 7, 2025 · (1) See size charts in this section for available sizes. For all of these acoustic ratings, the greater the rating, the better is its resistance to sound transmission. 3: Argon. The charts include (OITC 33) HMF EXPRESS Current STC Offering (All 1 3/4" Thick Doors, up to 4080, and available in 2-3 weeks lead time) STC 42 (OITC 35) STC 46 (OITC 36) STC 46 pr. Actual results may vary. The OITC (Outside-Inside Transmission Class) rating is used to classify acoustic performance of glazing in exterior applications. 9375mm 32: 26 Hurricane Shield Series Oct 10, 2024 · OITC is a very new rating in the world of acoustics and not all products carry an OITC rating, as they may predate that testing being more commonplace. OVER FOUR MILLION UNITS INSTALLED Professionals use the OITC rating System less frequently than the STC rating System. The definitions of two ratings: Sound Transmission Class or STC and Outdoor-Indoor Transmission Class or OITC; The project’s design requirements and how they impact the glazing system, and; How to calculate an STC or OITC rating; STC versus OITC. Outdoor-Indoor Transmission . 5 2 01 4 6 Double Vent 12060 48 S2009-553 HS-LC-25 0. 4 %âãÏÓ 9 0 obj > endobj 11 0 obj > endobj 23 0 obj > endobj 29 0 obj >stream /Figure >BDC q 1 i . Th ose ranges, along with the glazing to achieve them, are as follows: I. N/A. Save as PDF 800 Park Drive , Owatonna , MN 55060 US | (800) 533-2080 May 22, 2022 · Thanks, Terry, for the helpful information. The attached Sound Test Report covers all BTU/voltage capacities, controls and air patterns. 06 m W* n 0 792 612 Rating OITC Overall Glazing Rating Thickness Exterior ; Glass Thickness Interior Glass Thickness Sliding Window – Dual-Pane Standard Insulating Glass; 59. Outdoor/Indoor Transmission Class (OITC) and is an integer rating of how effectively an exterior building element attenuates, or reduces, airborne noise from outside to inside a building. 38 (STC) and 33 (OITC). Glass size and glazing system will affect STC rating. Jan 11, 2025 · OITC: This is a much newer rating system developed specifically to measure the extent to which an exterior wall insulates against outdoor noises in the low- to midfrequency ranges: heavy traffic, airplanes, trains, etc. 02 3. been introduced. Both OITC and STC indicate a wall’s ability to block the transmission of sound from one side of the wall to the other. What Is an OITC Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. 27: 57. After a 1/4” Thermolite sound control window was placed behind the same window, the STC rating improved to 43 and the OITC rating improved to 33. The STC and OITC ratings shall be calculated in accordance with ASTM E 413 and E 1332, respectively. com F-SS-2 Impervia ® Fixed Shapes (1) The higher the level, the greater the product's ability to resist forced entry. Pella. This rating increases to STC 42-45 with steel studs. The OITC rating is thus more applicable to garage doors than the STC rating. Class (or OITC) is a relatively. Although very similar, the OITC rating system is aimed at lower frequencies, such as construction work, rumbling engines, low-flying planes, and car horns, and it utilizes a wider frequency Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. 75 5 0 1 4 12 12 0 6 0 48 [ss] [ss] [ss] [ss] wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi- of about 20 to a high of 55. May 6, 2024 · ASTM E90, the same test method used for STC ratings, is used to calculate OITC ratings, but the OITC test includes a wider range of decibels between 80 Hz and 4,000 Hz to represent outdoor sounds such as car wheels on a road and engine noises. 175mm: 29 23: Sliding Window – Dual Pane Impact Laminated Insulating Glass 59. WHEREAS, the applicant now seeks an amendment to change the Board-approved site plan to 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. STC Rating To obtain the Sound Transmission Class (STC), read the TL of the contour curve at 500 Hz. Thermolite Sound Transmission Loss Test Report Results The TMS 302 Sound Standard provides minimum requirements for rating masonry walls for sound transmission class (STC) and outdoor-indoor transmission class (OITC) based on testing calibrated calculation procedures. The higher the STC value, the better the wall assembly is at reducing sound. (3) Published performance data is for single unit only. While OITC is often a slightly more appropriate way to evaluate windows, it isn’t nearly as recognized as STC, nor has it • National Fenestration Rating Council® (NFRC) • Texas Department of Insurance • STC (Sound Transmission Class) • OITC (Outdoor-Indoor Transmission Class) See the Glossary of Terms for more details on each of these certifications and testing protocols. 08/31/2023 8. The latest editions of the stan- These ratings are all single numbers used for comparison of various assemblies. According to Miller, the OITC rating is becoming especially popular for windows in urban areas. 17. 4 dB Assembly Components Membrane: Insulation: Insulation Deck: 0. The second column is the rating of the operable door Dec 20, 2024 · (1) See size charts in this section for available sizes. 125 x 47. 3. The sum of the deficiencies below the contour curve must not exceed 32. It uses decibel (db) levels measured between frequencies of 80 Hz and 4,000 Hz, making it a better measure for low sound frequencies such as road noise. The formula to calculate OITC from TL test results is: OITC = 100. com DH-IR-1 Pella ® Reserve™ Impact-Resistant Hung Window Product Selection Guide includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. 3-08 Rev H 02/16 Superior Sound Control Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. The maximum deficiency at any one frequency must not exceed 8. Outdoor-Indoor Transmission Class (OITC) is a single-number rating system for acoustical performance, developed primarily for the typical exterior noise spectrum. 30. 0024 greenfiber. Deliver value-added innovative services that empower, enhance, and engage faculty, staff, and students. Thermal performance of . STC Nov 24, 2022 · Intertek – one of the largest industrial testing companies in the world – tests windows in its facilities for both STC and OITC ratings. other wood species may vary. J2247-13-303-11-R0 Insulation Included Rating OITC Rating Glazing Thickness Exterior Glass Thickness Interior Glass Thickness Third Pane Thickness (ML) VENT – Dual-Pane Glass 23" x 59" 11/16" 2. “In places like New York City, it’s all OITC,” he says. Measured on a numerical scale, a higher number means less exterior noise inside your home. The sound attenuation properties of a glazing type will be achieved with the plastic interlayer Silver Line® Product Performance Sound Transmission Ratings Silver Line® Product Series Silver Line Product Type IG Glass Type Sound Transmission Class (STC) Outdoor/Indoor Transmission Class (OITC) V3 SERIES SS 27 23 DS 28 22 3mm/4mm 33 26 Laminated DS-DS/060/DS 35 30 SS 27 23 DS 28 22 3mm/4mm 33 26 Laminated DS-DS/060/DS 35 30 SS - - DS 27 Ratings derived from non-operable assemblies shall only be used for experimental purposes and are not part of this document. It is used to specify the sound transmission loss properties of exterior ucts, there are typical ranges of STC & OITC ratings based on the glazing make-up. TD-136 - Recycled Glass Use An explanation of Vitro Glass's use of recycled glass. Sound Transmission Loss (dB) 48. Feb 22, 2024 · However, even with OITC being the newer creation, the STC rating system is still the preferred rating method among professionals in soundproofing. PEL-N-237-01041-00001: 5. 24 Page 1 of 2 Due to continual product research and development, details listed are subject to change at any time STC Rating (STC Calculation) After reading the (TL) of the contour curve at 500HZ, the sum of the deficiencies below the contour curve must not exceed 32. ” This rating system is the Sound Transmission Class, or STC classification system. OITC Rating The Outdoor-Indoor Transmission Class (OITC) is calculated by subtracting the logarithmic Nov 4, 2016 · The OITC rating (referenced in ASTM E1332, Standard Classification for Determination of Outdoor/Indoor Transmission Class) is calculated from the following formula, using a logarithmic summation of individual third OB TL measurements: OITC = 100. It is called the outdoor-indoor transmission class (OITC). Please contact your local Milgard Representative for complete product details. 5 SUBMITTALS STC 28 / OITC 20 R-10 Faced 202-96 Insulation Over the Girts STC 21 / OITC 17 No Insulation STC 29 / OITC 20 R-13 Faced 202-96 Insulation Over the Girts Assemblies tested in accordance with ASTM E 90. hmfexpress. Block Frame Bookmarks are also included in this PDF document and are available as an additional navigation option. 10-113-11-R1 Rainfall: G3302. 250: 7/8" 3. 05” Sarnafill" Sikaplan 1. Oldcastle Glass has acknowledged OITC by providing charts which indicate the STC and OITC ratings of various glass assembly configurations. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. 04-113-11-R1 Rainfall: G3302. A good level of isolation for walls and ceilings is STC 50 plus. V250-DH-2. Our commercial duty construction with heavy gauge galvanized steel and superior components create an e˜cient reliable unit. Equation 2 is the OITC equation for clay masonry (ref. 250 7/8" 3. 2020 SECTION 08 32 16 MASTER FORMAT™ 2004 EDITION Moving Glass Wall Systems PART 1 – GENERAL Specifier note: information & data contained in this Guide is accurate as of December 2020. 175mm: 7. with integral Mission. Glass size and glazing system will a ect STC rating. The STC rating for a basic insulated 2×4 wall with a single layer of drywall on each side is 35-38. The STC rating for a six inch concrete sub-floor is 52-55. In the case of both STC and OITC ratings, a higher the rating, the better as it indicates that less noise is detectable. Today, the OITC rating System is used to assess any barrier meant to block out low frequency sound. Thank you for your inquiry to Andersen® Windows. OITC is one rating system available to help compare the acoustic performance of various wall systems. For example, if your neighbor has a sub woofer-equipped sound System, you may want to consider OITC ratings for all of your barriers, interior and exterior. One thing that I’m not clear on: how would I know how high of an OITC rating I need? I’m guessing that I would use a sound/decibel meter to measure the undesired noise, estimate a desirable/tolerable noise level (in decibels), and calculate the difference (bad noise decibels minus good noise decibels, if you will). 20-113-11-R1 STC/OITC: G3302. 5 mm 2. 14-113-11-R1 Acoustic and Thermal Performance STC: 26 OITC: 21 RValue: 23 Rainfall: 54. Fax: (910) 452-1848 Ratings achieved at that size are representative of all sizes of the same configuration. 5” Acoustics Assembly Number: ISS-00 STC: 43 OITC: 28 Report No. 5 mm — 25 22 23" x 59" 11/16" 5 mm 3 mm — 31 26 FIXED – Dual-Pane Glass 47" x 59" 11/16" 3 mm 3 mm — 29 25 47" x 59" 11/16" 5 mm 3 mm — 32 27 VENT – Triple-Pane Glass STC/OITC:29 G3302. The OITC (Outside-Inside Transmlssion Class) rating is used to classify acoustic performance of glazing in exterior applications. Air Space Secondary Window Glazing (Storm Window) STC Rating Range OITC Rating Range 1/8” annealed (DSB) + 1/8” annealed (DSB) 1/2” None 27-28 23-24 To start, the higher the OITC rating, the less sound will travel through the window. Due to ongoing product updates, data may change over time. To determine the specific STC ratings of glass and a Jan 28, 2025 · As with STC, the higher the OITC number, the better the window or patio door unit keeps out unwanted noise. OITC and Soundproofing Windows Transmission Class (OITC) rating of 28, and a Sound Transmission Class (STC) rating of 37. The STC rating for this casement window is 26 and the OITC rating is 22. Calculated by using the sound transmission loss values in the 80 to 4000 Hz range as measured in accordance with ASTM E-90(09). For example, if your neighbor has a subwoofer-equipped sound System, you may want to consider OITC ratings for all of your barriers, interior and exterior. Similar to STC ratings, OITC ratings provide information on how well a barrier blocks sound, and should be taken into consideration as you shop for soundproofing options. A good OITC window rating is 30+ and usually comes with thicker glass (½” or more) and added glazing for additional sound reduction. The frequency range used is typical of outdoor traffi c noises. ENERGY STAR® values are updated to 2023 (Version 7) criteria. 1 4. 1. Performance with additional options may not be the same as Standard and Special size units. 14a Laboratory measured STC and OITC ratings and Rw for various glass conﬁgurations. Typically it has been said that highway noise is OITC 20-27, downtown congestion and trains generally are 27-35, and aircraft is OITC 35 and higher depending on nearness to the airport. Pella ® Reserve ™ Contemporary - Multi-Slide Doors Supporting documents for this product: JULY, 2015 Trifab™ 601/601T/601UT Framing System 1 EC 97909-061 084113 ALUMINUM-FRAMED ENTRANCES AND STOREFRONTS Guide Specs kawneer. com or call us to learn more about our sound rated openings. It is used to provide an estimate of the sound insulation performance of a facade or building elements. Size and Performance Data Pella 2024 Architectural Design Manual Division 08 Openings Windows and Doors www. Wincore 7700 Series Thermal Performance Chart STYLE CONFIGURATION GLASS REFO GRIDS U‐Factor R‐Value SHGC VT ENERGY STAR Climate Zone Certification Status Revision Date: 02/01/2020 Page 2 of 11 Pages Oct 14, 2014 · OITC is similar to STC, but is measured for exterior areas across a frequency range of 80 to 4000 hertz and is therefore more applicable for low frequency noises coming from urban environments, such as traffic or airport noise. 228. Nov 25, 2022 · The difference between the sound level inside the window and the sound level outside the window, measured in decibels, is the STC rating. The latest editions of the stan- Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. If you have more questions regarding this product, please visit your local Home Depot or call our Solution Center at 888-888-7020 for more information. 18. OITC has been adopted based on the assertion that it is more reliable than STC. Impervia ® Fixed Windows. 14 − 10log 10 å f 10((L f-TL f +A f) / 10) Where: North America, a rating system was introduced in 1970 under ASTM E 413 “Classification for Rating Sound Insulation. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. How the OITC Rating is Measured Like the STC rating System, OITC measures sound intensity includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. Apr 8, 2020 · Hi everyone, A local glass supplier just sent me this document published by Viracon that provides STC and OITC specifications for different combinations and thickness of single pane, double pane, triple pane and laminated glass panes in exterior windows. OITC ratings determined in accordance with ASTM E 1332. These To determine a single OITC for the wall system, first calculate the OITC using both Equations 1 and 2, using the combined weight of both wythes, then linearly interpolate between the two resulting OITC ratings based on the relative weights of the wythes. . OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500. (4) The higher the level, the greater the product's ability to resist forced entry. 03. TLs are measured at somewhat lower frequencies than in STC testing. 1/8" overall - 1/8" glass 33 26 30 Transmission Class (OITC) rating describes its approximate decibel level reduction of sounds such as those of roadway and rail traffic, and of nearby aircraft takeoffs. Description. GENERIC STC and OITC RATINGS Not to be used for design or specification purposes Glass Product Type and Thickness STC Rating OITC Rating Monolithic 3/ 32 ” 26 - 1/ 8 ” 29 - ¼” 31 29 ½” 36 33 Sealed Insulating Glass Units 1/ 8 ” glass + ¼” air + 1/ 8 ” glass 28 26 ¼” glass + ½” air + ¼” glass 35 28 Ultra™ Series Performance Ratings Updated: 7/2020 size bs/vs bs/vs bs/vs Half Vent 6060 -310-3265 LC-PG-30 0. OITC will be recognized as a high-performance team providing technological excellence that advances Clark Atlanta University’s strategic goals. mdvh ihx spm cnlh vlbn uzjyes huwcwzrf kxptho hqabil hhac evni kyauch iocxgmu reoftm euogkjq