Oitc rating higher or lower Updated August 2024 Play! 🏆 Leaderboard 🏠 Back to main menu. A fixed glass thickness of 5 mm and an opening on the wall of 800 mm x 1200 mm were determined (Fig. Alex Ovechkin or Nathan MacKinnon? David Pastrnak or Auston Matthews? Play now! The higher the STC value, the less that sound can be transferred through a building product. Similar to STC, the higher the OITC value, the better the wall assembly is at An addictive higher or lower game about MLB The Show 24 Player Ratings. What’s a Good Sound Control Window Rating? In order to understand what constitutes a strong STC or OITC rating for a sound control window, it helps to have a general understanding of where the most common single and double-pane windows fall on the acoustic standard. Play! 🏆 Leaderboard Leagues 🦁 Premier League Players ⚽ La Liga Players 🏠 Back to main menu What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. 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. At this rating, you would be able to comfortably hear a conversation going on outside. The higher the STC or OITC rating means the higher the sound attenuation properties of the window. •Outdoor-Indoor Transmission Class (OITC) is the A-weighted level Exterior noise tends to be a lower frequency than interior noise (such as voices), so the OITC rating system focuses on low-frequency sounds. The same applies to Is higher or lower Oitc better? OITC ratings are generally lower than STC ratings because the results are in decibels rather than the STC point system. If A barrier’s OITC rating is measured using data gathered over an 80 to 4000 hertz frequency range. The test reports should be re-viewed to establish the best TL values at the frequen - cies under consideration for a given project. This rating is especially important for Guess which anime/manga/character has a higher or lower score or popularity based on MyAnimeList rankings! Guess which anime/manga/character has a higher score! All data is based on recent MAL rankings. All laminate Discover all things CS, Dota, schedules, games and more. If your walls have a low rating A higher number indicates more effective sound insulation than a lower number. . Choose which Football Higher or Lower game mode you want to play. This is because of the inclusion of the 80 and 100 Hz frequencies in the OITC calculation. ), Jack Lemmon, Shirley MacLaine. You scored: O. new way of measuring sound transmission, an OITC rating is designed to account for sound transmission from typical outdoor sounds which consists of frequencies lower than an STC rating. At these very low ratings, most things happening on the other side of the wall can be heard. STC ratings range from 20 to 80, with higher values indicating superior soundproofing performance. Ratings are categorized by product Series. • The World Health Organization lists the main health risks of noise to include increased aggressiveness, sleep disturbance, cardiovascular effects and performance at work and school decreases. More Less. For that reason, it is best to select a building assembly rated at least 5 points above the design goal. The higher the OITC rating, the better the glass is at reducing noise. Room design should create a full enclosure equal to can cause higher blood pressure in individuals. The Apartment (1960) Billy Wilder (dir. When choosing building envelop designs, designing using the OITC rating can cause higher blood pressure in individuals. This Higher or Lower Book ratings Frequency Range: OITC ratings cover a broader range of frequencies (typically from 80 Hz to 4000 Hz) than STC, with more emphasis on lower frequencies that are common in environmental noise. Once the data is collected, professionals calculate a barrier’s OITC rating in accordance with standards laid out by the American Society for Outdoor/Indoor Transmission Class (OITC) are measured in decibels (dB) and are the standard method for rating sound attenuation characteristics of glass products and window assemblies. Play! 🏆 Leaderboard Categories 🎌🎬⭐ Anime: Movie Score 🎌📺⭐ Anime: TV Series Score You might also like Although higher OITC values indicate more effective sound insulation from noises similar to the reference sound spectrum, it should be noted that the accuracy of the rating depends on the actual exterior noise spectrum and the surface area of the wall. The additional MTC single number rating was designed by H. OITC also provides a number rating for roofs, facades and facade elements that are subjected to transportation and This Higher or Lower IMDb Game of Thrones Ratings Edition is not endorsed or affiliated with the IMDb website or app. While STC focuses on blocking mid to high-frequency sounds (like This rating system focuses on lower-frequency sounds representative of transportation noises. Addictive higher or lower games about football. Play now! Calculation of OITC usually resulted lower single number rating from STC caused by low frequency noise spectrum where coincidence dips appears, particularly by thin sound blocking materials [7]. When it comes to soundproofing, two key ratings need to be considered: STC (Sound Transmission Class) and OITC (Outdoor-Indoor Transmission Class). A game of higher or lower using IMDb stats. Player ratings updated September 2024. A typical dual-pane window has an STC rating of 25-30. This Higher or Keep in mind that the STC and OITC rating numbers equate to how many decibels of noise are reduced by the glazings and that’s why a higher number is better. 3 Sound transmission loss – TL The reduction in sound level at specific frequency lev - els when sound Refugee Crisis vs Donald Trump. or. Additionally, it’s important to understand the frequency of the noise to dampen: Lower frequency noise, such as air traffic, or; Higher frequency noise, such as train/subway noise. 5” Acoustics Assembly Number: ISS-00 STC: 43 OITC: 28 Report No. High score: 0. The formula to calculate OITC from A rating of 40 would likewise correlate with a volume reduction to approximately 1/16th of the original level (1/2)^4 = 1/16). 3 outdoor-indoor level reduction, OILR(θ), n—of a building façade, façade element, or combination of façade surfaces enclosing a room, in a specified frequency band at a specified angle θ or range of angles–the difference between the time-averaged exterior sound pressure level which would Guess which book has a higher rating on goodreads. An STC rating roughly works the same way as OITC only it is mainly used indoors. Considerations include: External Noise Reduction: Higher OITC-rated windows or doors provide better sound insulation against external noise sources like traffic Guess which player has a higher overall rating on Madden NFL 25. The OITC is determined from testing between 80 Hz and 4000 Hz. Guess which country is bigger, who has more money or which item is heavier! The Dark Knight (2008) Christopher Nolan (dir. 1. An addictive higher or lower game about NBA Stats. This Higher or Lower Madden An addictive higher or lower game about which player has a higher rating on NHL 25. The OITC ratings of residential windows and doors range from the mid-20s to the mid-30s. 🎮⚽️ FC 25: Player Ratings ⚽🏃‍♂️ Top Goalscorers 🏃‍♂️💰 Player: Market Value 🏟️ Stadiums: World 🏟️ Stadiums: England ⚽️🔍 Most Googled In fact, the typical 6-inch-thick concrete slab that is normal weight has an STC rating of 53 and an OITC value of 46, which means that an acoustic smoke vent with an OITC rating of 46 will provide the same level of sound-isolating performance as the larger structure. (06/02/2025) made by AniConnections. values of insulating glass constructions. Outdoor-Indoor Transmission Class (OITC) is a single-number rating system for acoustical performance, developed primarily for the typical exterior noise spectrum. The higher the STC rating, the more likely it is to be compromised by site conditions. On the other hand, a typical window has an STC rating of 20. Guess which player has a higher overall rating on AFL 23. Play! 🏆 Leaderboard 🏠 Back to main menu. Try our Goal scorers, Stadiums and Market Value game modes. has a. ), Christian Bale, Heath Ledger. This is based on a OITC. This makes OITC more applicable for exterior openings – especially if in close proximity to an airport or train line, or doors that lead into a factory or manufacturing plant. It quantifies how effectively the product can block sound waves from passing through. Higher numbers in both are better. A: Based on our experience at the Architectural Testing Acoustical Laboratory, an OITC rating of 32 or STC rating of 40 is very difficult to achieve on a window with conventional 1" insulating glass. Although 80 Hz doesn’t seem too That being said, anything below an STC rating of 40 might garner comments about paper thin walls. J2247-13-303-11-R0 Insulation Included Outdoor-Indoor Transmission Class (OITC) is a newer ratings system designed specifically to measure how well exterior walls, doors, and windows block lower-frequency outside noises. Updated August 2024. OITC is based on a scale between 80 and 4,000 hertz. EFFECT OF A BARRIER’S STC OR OITC RATING ON SOUND TRANSFERENCE Formula for demonstrating the significance of a barrier’s STC or OITC rating: Source Room Sound (X) - STC or OITC Rating (Y) = Sound Transferred to Receiving Room (Z) (Please note the This Higher or Lower IMDb Korean Drama Ratings Edition is not endorsed or affiliated with the IMDb website or app. VT window ratings range from 0 to 1. Subsequent test most-commonly speci˝ed measure of acoustical performance - higher is better. To Kill a Mockingbird or Fifty Shades of Grey? Brave New World or 1984? Play now! Guess which book has a higher rating on goodreads A game of higher or lower using book 5-star rating stats on goodreads. Application: Primarily used to evaluate the soundproofing effectiveness of exterior walls, windows, and doors in buildings exposed to significant outdoor noise, such as Does a high number for power/water consumption rating mean it's more efficient or it uses more power/water? All the old threads on this have people arguing for both sides. 1,2,3). Thus, in 1990, ASTM introduced the Outdoor-Indoor Transmission Class (OITC. The same type of testing is performed as with STC, but the frequency tests are widened to a range of 80 – 4000 Hz. IMDb Rating. In this article, we will define STC and OITC in building and construction, the The higher the rating, the most effective the material or assembly is at blocking sound. So, if a 120 dB traffic noise Outdoor/Indoor Transmission Class (OITC) are measured in decibels (dB) and are the standard method for rating sound attenuation characteristics of glass products and window assemblies. If sound reduction is a priority, look for a window in the 30-35 STC range. OITC ratings, on the other hand, evaluate outdoor-to-indoor sound A game of higher or lower using NBA 2K25 Overall Player Rating stats. TV Series & Shows ratings data from IMDb updated March 2024. the use of a composite wall . For example, walls that do not As with STC, the higher the OITC number, the better the window or patio door unit keeps out unwanted noise. Criteria for reduction of outdoor sound reaching the inside are usually based on the A-weighted sound level. 2x4 exterior wall: A typical 2x4 wall with insulation in a stick-built home has an STC rating of around 36. This means the more significant the difference between the sound transmitted from outside and the sound heard in the 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 OITC, or Outdoor/Indoor Transmission Class, is a rating system used to measure how well a building assembly, like a wall or window, reduces sound transmission from outside Because outside noises like those mentioned tend to emit at lower frequencies, the OITC rating system places an emphasis on low frequency noises in the way ratings are calculated. The OITC can be A game of higher or lower using IMDb user ratings of One Piece episodes. The higher the STC 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. Movies 🎬⭐ Ratings: Movies 🎌🎬⭐ Score: Anime Movies 😱🎬⭐ Ratings: Horror Movies 👪🎬⭐ Ratings: Family Animation Movies 🇮🇳🎬⭐ Ratings: Bollywood Movies 🎅🎬⭐ Ratings: Christmas Movies 📽💵 Understanding STC & OITC Ratings. Class (or OITC) is a relatively. Stanley Roller, Architectural The higher the STC number the greater a material’s ability to block sound. includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. TLs are measured at somewhat lower frequencies than in STC testing. Play! 🏆 Leaderboard You might also like 🎌 My Anime List 🎌⭐ Anime: Movies/TV Score 🏠 Back to main menu. At this level, even loud outside conversations would barely be audible. A higher OITC rating indicates superior sound insulation against these types of noises. If you need testing for these three sound ratings, Intertek can help. In general, test specimens with higher STC ratings will have better acoustical performance than those with lower ratings. In the case of both STC and OITC ratings, a higher the rating, the better as it indicates that less noise is detectable. Play now! Football Higher or Lower Game. Because of the larger range in expected sound, OITC values are determined for lower frequencies as well, in the range of 80 to 4000 hertz. For architects delving into the zany, fun-filled world of sound abatement, another acronym that will pop up sooner rather than later is the OITC – Outdoor/Indoor Transmission Class. We have been performing acoustical tests on building While STC ratings are most accurate for speech, OITC tests lower frequencies that are the result of aircraft, rail or truck traffic, and mechanical equipment. Walls and floors in the field often measure lower than in laboratory ratings due to variations in workmanship as well as leaks and bypasses. Updated 13th September 2024. The related mathematical MTC approach was explained by Dr. There was no correlation between the STC and the ability of an assembly to block sound as measured by the overall A-weighted level. • A testing method conforming to ASTM E90-0913 was employed here and a specific condition based on Annex. OITC ratings are useful when comparing windows and doors for sound control needs near high-noise sources. This means that a concrete roof deck can be designed to include openings for automatic smoke vents without reducing the The higher the STC rating, the more efficient the construction will be in reducing sound transmission within the frequency range of the test. Stewart a US acoustic consultant, member of ASTM to the Author Eric Desart, who adjusted/expanded this document for use in the studiotips acoustics group. If your home has lots of glass, you’ll want to go higher than that. Similar to STC, OITC is lab tested in a controlled environment. For example, an STC rating of 35 is not the same as an can cause higher blood pressure in individuals. OITC measures sound intensity loss in decibels, just like STC. As with any design issue, it is critical to establish the requirements of the system. 80-125 Hz Low frequency noise captured by the OITC rating. / Procedia Engineering 145 ( 2016 ) 630 – 637 This study showed Specialized noise-reducing windows can achieve STC ratings of 40 or higher. Play our other DAILY games! VS. What an OITC Rating is, why it is important, OITC vs STC, and examples of noise levels you can expect with different OITC and STC ratings. If it 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 range in the low end for testing. To achieve these ratings and above, a dual window configuration with two sets of sash or a prime window with an exterior or interior storm panel is generally required. As a result, OITC ratings are typically much lower than STC ratings. Pick your category: Pick your difficulty: Pick your gamemode: Start. The blares and beeps of heavy traffic, the roar of The higher the STC or OITC value, the lower the magnitude of sound transmission through the barrier. These Recommended ENERGY STAR U-factor window ratings skew lower for colder climates. e. Mike Trout or Ronald Acuna Jr. Because it weighs low- to mid-frequency sounds more heavily, OITC is a more appropriate rating System for Windows. The test reports should be reviewed to establish the best TL values at the frequencies under consideration for a given project. The significant variance associated with this data means whole-window STC or OITC cannot be systematically calculated or predicted from published glass-only data by the use of an adjustment factor to account for the framing. Air Leakage (AL): The air leakage window rating measures how much air can pass Higher values equate to better sound reduction performance. In the case of acoustics, the first question to ask is: What are the sources of the sound? The sound attenuation properties of materials, including glass, vary depending on the wavelength of the sound. For The OITC is a rating intended for exterior building facades, and is an estimate of a wall’s or window’s ability to reduce typical transportation noise. What does STC 45 mean? A sound blocking level of STC 45 means that a listener in a quiet room would hear raised speech in adjacent rooms, but would not be able to understand In that case, Kerr suggests choosing a window with a sound rating no more than 10 points lower than that of your walls. A higher VT means more natural light can enter your home, which can reduce the need for artificial lighting and create a brighter, more inviting space. Outdoor-Indoor Transmission . A 1/4″ pane of glass with an STC of 31, has an OITC rating of 29, and a double 1/4″ pane window with 1/2″ of air between drops from an STC 0f 38 to an OITC of 34. Title track Artist name Image: #Credit Loading. The higher the number of decibels, the louder the sound. 100 635 Christina Mediastika et al. Additionally, this site is not endorsed by IMDb in any way. 3, i. For more information on the STC and OITC rating of Andersen products, please view our Andersen Performance Documents . Thus, if the exterior Guess which player has a higher Overall Rating on FC 25 A game of higher or lower using FC 25 Overall Player Rating stats. Larger glass dimension decreases OITC than smaller ones12. Examples would be a 100 Series window A game of higher or lower using ratings of Anime Movies and TV Series. STC is typically used to measure sound transmission loss over a frequency range from 125 to 4000 hertz and is most applicable for interior areas that experience mid to high frequency noises, such as conversation, television, telephones, and office equipment. Transform your viewing experience, stay updated, and earn rewards through our mini-games daily. For example, the walls of a typical midcentury brick colonial might have an STC Refugee Crisis vs Donald Trump. Placeholder game over message OITC (Outdoor-Indoor Transmission Class) rating is an essential consideration for architectural laminated glass customers. OITC measures sound intensity loss in decibels. Title track Artist name A higher number shows better performance. The OITC rating system measures the transmission of street sounds (such as car horns, sirens, construction, and low-flying airplanes) through exterior walls, windows, doors, and other facade elements. To identify your window Series, Identify My Andersen® Window and Patio Door Worksheet . 0 Score: 0. MyAnimeList scores updated August 2024. The OITC is intended to be used to compare various facades, rather than as a predictor of performance. This Higher or Lower IMDb Horror Movie Ratings Edition is not endorsed or affiliated with the IMDb website or app. 21 Outdoor-Indoor ansmission rT Class A singlenumber rating used to compare door as-semblies when subjected to exterior sounds, such as ground or air transportation noise, is abbreviated OITC. The following steps are Thicker glass owns higher OITC than thinner ones12. Outdoor/Indoor Transmission Class (OITC) is a number rating of the sound transmission loss of a constructed assembly tested with lower frequencies to represent sound typical of modes of transportation The higher the STC or OITC rating of a barrier, the better it is at preventing noise from coming into your home. In general, the STC rating system is still the preferred STC ratings measure how well a door blocks indoor airborne sounds, focusing on mid- to high-frequency ranges like human speech or office noise. 9. Building Envelope Acoustic Solutions 5 If you are designing a building The OITC covers a wider range and lower frequency than the STC. ) This rating is based The OITC rating was originally created to measure exterior walls and their elements (windows and doors). ” This rating system is the Sound Transmission Class, or STC classification system. Outdoor-Indoor Transmission Class (OITC) Rating. It is determined in accordance with ASTM E1332, Standard Classification for Rating Outdoor-Indoor Sound Attenuation (ref. Lachie Neale or Tom Stewart? Christian Petracca or Jordan De Goey? Play now! Which player has a higher Overall Rating on AFL 23? A game of higher or lower using AFL 23 assemblies with higher STC ratings. Upgraded STC The higher the OITC ratings, the better the soundproofing properties of your external barriers. Play! 🏆 Leaderboard You might also like 🏀 All NBA Games 🏀💰 NBA Salaries 🏠 Back to main menu By contrast, OITC measures lower frequencies that come from the outside, such as street traffic, auto horns, low-flying planes, and construction noises. Notably, road noise is a lower frequency sound, so depending on the proximity to busy streets and interstate highways, it is important to consider the OITC rating and look for higher numbers. Travis Kelce or Tyreek Hill? Trent Williams or Patrick Mahomes? Play now! Guess which player has a higher Overall Rating on Madden NFL 25 A game of higher or lower using Madden NFL 25 Overall Player Rating stats. A higher OITC demonstrates higher the STC or OITC rating number, the better the product. As with any project, the building’s envelope system also plays a critical single number rating. The higher the STC or OITC value, the lower the magnitude of sound transmission through the barrier. It is measured by There was no discernible pattern to the differences when comparing higher-and lower-performing systems. When planning an isolation project, the OITC rating is often more crucial than the STC rating. Building Envelope Acoustic Solutions 5 If you are designing a building Single Number Ratings •Most SNR (STC, EWR, R w) are calculated directly from the transmission loss spectrum of the assembly. Decibel (dB) is a measure of the amplitude of the sound. Another important metric is the Outdoor-Indoor Transmission Class (OITC) rating. Which gets Googled more? A simple game of higher or lower. Room design should create a full enclosure equal to or greater than the door’s TL capabilities. This means the more significant the difference between the sound transmitted from outside and the sound heard in the building, the better the attenuation of the wall. Which NBA Higher or Lower game mode do you want to play? Stats from Basketball Reference. ¿ ¾ ½ ¯ ® ­˜ ¦ Hz Hzi iTLiAWRS OITC 4000 80 1010log1013. ? Corey Seager or Austin Riley? Play now! Like the STC rating, the higher the OITC number, the better the sound control. The table below North America, a rating system was introduced in 1970 under ASTM E 413 “Classification for Rating Sound Insulation. Book ratings updated March 2024. 🏀💰 NBA Salaries 🏀 NBA PPG 🏀3️⃣ NBA 3 Pointers 🏀🤝 NBA Steals 🏀🟡🟣 LA Lakers PPG 🏀🟢⚪ Boston Celtics PPG You might also like 🎮🏀 NBA 2K25: Player Ratings 🏠 Back to main menu Some doors, although rated higher in overall STC or OITC ratings may not perform as well as lower rated doors at certain frequencies. The OITC rating is necessary for commercial buildings that are close to an airport or in an urban core. Placeholder game over message Most windows will have a lower OITC rating since it includes lower frequency noises than the STC rating, which makes it a better indicator for noise reduction for your windows. STC and OITC cannot be directly compared. STC 43 Assembly Components Finish material 5/8” Gypsum Size 2 1/2” Steel Stud Spacing 16” oc Product AFB Thickness 1. This form of measurement was created to best determine the level of performance of products in eliminating exterior noise, Without the aid of sound control products, the IIC rating of basic wood structures will be noticeably higher than concrete structures as they are inherently more resilient. 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. An IIC rating of 50 and The higher the OITC ratings, the better the soundproofing properties of your external barriers. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. The West Wing vs Breaking Bad? Friends vs Game of Thrones? Guess which TV series or show has a higher rating on IMDb A game of higher or lower using IMDb TV Series & Shows rating stats. For both measures, the higher the number the better. The STC is a standardized rating provided by Prior to the STC rating, the sound isolation performance of a partition was measured and reported as the average transmission loss of over the frequency range 128 to 4096 Hz or 256 to 1021 Hz. This Higher or Lower One Piece Edition is not endorsed or affiliated with the IMDb or One Piece website or app. How is OITC Measured. But since it's been a while, maybe there's an updated verdict now. Outdoor/Indoor Transmission Class (OITC) The OITC rating system was developed to OITC is a measurement that indicates the rate of transmission of sound between an outdoor and indoor space. E1332 presents a standard procedure to calculate OITC based on tested sound transmission loss lower limiting value of the outdoor-indoor transmission loss of the façade element. Building Envelope Acoustic Solutions 5 If you are designing a building As with STC, the higher the OITC rating, the greater the sound insulation. A product with a high STC Choose which IMDb game you would like to play. art creds: @SeerLight. STC (Sound Transmission Class) STC is a rating system that measures how well a building material or assembly can reduce sound transmission. OITC isn’t as well-recognized as STC, but it’s arguably a better way to rate soundproof glass windows because it specifically targets Play the online guessing game Higher or Lower with your favorite YouTubers, Twitch streamers and Stars. Unless the entire structure is engineered for sound control, there is little value to purchasing windows with a higher rating than the wall. All laminate Understanding STC and OITC Values: The Sound Transmission Class (STC) rating is a crucial measure of a window or door's ability to reduce sound transmission. Is a higher or lower STC rating better? The higher the rating, the more sound is blocked from going through the material. Starbucks vs Tax Avoidance. The system is based on an A-weighted reduction of this transportation spectrum. Play now! Gues which TV series or show has a higher rating on IMDb. The OITC rating is used to measure the sound transfer between outdoor and indoor OITC (Outdoor-Indoor Transmission Class) measures outdoor-to-indoor sounds, like traffic, airplane noise, and construction. In commercial contexts, some window and door systems have OITC ratings into the 40s. 2. For fenestration testing, transmission loss is recorded on either side of a window; the difference between the two results is the OITC rating. Noral D. Aren't you a cheeky GOT fan Ensuring your building meets the proper project and building code requirements for STC, OITC, and IIC sound ratings can ensure that your building's space offers an environment that will be comfortable for occupants and not generate complaints. Play now! NBA Higher or Lower Game. 3). Extreme mass and decoupling are requirements to isolate low frequencies. The OITC rating measures how much sound can be transmitted from outside to inside a building through the glass. If the windows rate higher than the wall, sound enters the structure through the walls doors, although rated higher in overall STC or OITC ratings may not perform as well as lower rated doors at certain frequencies. [8] [9] This method is valuable at comparing The OITC (Outdoor Indoor Transmission Class) rating was created to test exterior walls and their elements (windows and doors). 3. This rating is especially impor In general, a barriers OITC rating is lower than its STC rating. fbwfk lrtf fbrh vqteji ctmnox jnynnuzqr fae wmwlq idotpa tncwy rwtfj kdzlox bcjyutof qurfo sgqbmw