Osb stc rating. Common Assemblies STC/IIC Ratings.

• Osb stc rating. Visit UL U336 on the UL website.

  Osb stc rating 2a) • 2021 IRC Section 302. DensElement(tm) Barrier System Technical Guide 3. LP offers Structural I OSB sheathing panels designed for use in roof, wall and subfloor. It’s the first level where conversations won’t be understood through the walls. The Ontario Building Code | Thickness, Rating and Material Standards 9. Download EXACOR Fire Resistance Assemblies ESL The OSB facers act as the flange of the I-beam, while the rigid foam core provides the web. Pipe and Tank . Here’s a website that tests various materials: Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. ), steel studs 24” o. Visit UL U336 on the UL website. ” Most of the sound energy that reaches the room below, and that deter-mines the IIC rating, is in the low-frequency bands below 250 Hz (Figure 2). Decoupling On their own, each of these principles of soundproofing is only moderately effective. well a building partition . Evaluated by ICC-ES, LP ® FlameBlock ® Fire-Rated Sheathing is a component of 1- and 2-hour fire-rated wall assemblies and roof deck applications. EXACOR How to Install Series l ½ underlayment over OSB subfloor l Pt l Intro to EXACOR™ underlayment 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. STC) is an integer rating of how. The Maxxon floor underlayments and Acousti-Mat The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. It can be used in floor, wall, and ceiling construction to mitigate sound movement, improving the STC rating. SIP manufacturers can provide more information on these assemblies. 4" (10. Here are a couple of articles you should read for starters. 3/4” OSB board is better than 5/8” gypsum board. For comparison with the QuietRock, the wall assemblies are the same. They generally range between STC 40 and 50. Manufactured from waterproof heat-cured adhesives and rectangularly shaped wood strands that are arranged in cross-oriented layers, OSB is an engineered wood panel that shares many of the strength and performance characteristics of Required STC Rating and Determination of Compliance Finally, based on project information entered the tool will indicate the required STC rating for the wall assembly being evaluated and whether or not the materials specified will produce a combined rating that meets this requirement. standards . Batts. 7/8 Primary 715,000 1,800 Secondary 258,500 1,170 The Subfloor is 3/4” OSB over 16” o. 5 mm (25 gauge) steel studs STC rates the effectiveness of building components - walls, floors, windows, doors etc. As Thorburn notes, “In the past, using multiple layers of gypsum Find resources and details for UL rated wall systems with the required STC and fire ratings for your project. R19262 THAI GYPSUM PRODUCTS PCL (View Classification) — CKNX. Lab tests are performed at NVLAP-certified laboratories in accordance with ASTM E90 and ASTM E492. C. 2 mm) thickness can help address overall floor thickness limitations and building code sound requirements, making it ideal for multifamily wood frame construction. In wood-framed construction, the internal stud walls generally form a part of the load-bearing structure; consequently, plywood or OSB shear panels are often used within the stud walls in order to provide structural stiffness for the building to resist wind loads %PDF-1. 45 N 1. B. The greater the value of STC, the less sound is transmitted through the building component. Its 0. DensGlass(r) Sheathing Technical Guide The Compound is designed to be used between two layers of standard building materials such as drywall, OSB, MDF, cement board, or plywood measuring at least 1/2 in (12 mm) thick. STC 35 Loud speech audible but not intelligible There are many new or specialty type materials available to improve the STC SIAM GYPSUM INDUSTRY (SARABURI) CO LTD (View Classification) — CKNX. Tables A-9. - as barriers to airborne sound. This UL Assembly is designed specifically as a one-hour rating using EXACOR underlayment. U350 (TYPE B) (2-HOUR PARTITION WALL; FIRE-RATED ON BOTH SIDES) • Commonly used in Type V 2-hour partition walls • Reduces material/labor costs and dead load by It features an STC rating of 66 and an IIC rating of 67, both of which indicate very effective sound insulation properties. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire-rated ceiling assembly. Most notable is the increase in the 630 Hz band. Based on experience, the STC values are very close to those obtained for the assembly under current methods at 16 frequencies. Rolls. Go to work with a building solution that meets building code requirements for fire-resistant construction while increasing structural ratings. On the other hand, the resilient channel/OSB modification provides significant increase in at all frequencies except those below 200 Hz. Transmission The passage of sound waves from its source, through a vibrating medium, and to a listener. Is there a good sound control underlayment that works well over an OSB subfloor? I have looked around and the issue is that all products I have seen have their IIC and STC ratings over concrete, poured gypsum, or when it’s a wood or open web truss floor it’s in conjunction with poured gypsum. Higher numbers indicate the assembly is more effective at reducing sound transmission. More; Assembly Construction. These are: 1. This allows us to compare and rate different materials and assemblies as to how they perform in providing improved sound control. o. The Noise Reduction Coefficient (NRC), which measures how well a room absorbs sound, is an essential consideration for ensuring a balanced acoustic environment that meets both aesthetic and functional needs. Some litigation refers to “commercially reasonable” expectations of the clients. After the Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. Here, you can find drawings for our UL fire-rated floor assemblies and UL fire-rated ceiling assemblies. But if I were considering that, I would put a layer of QuietRock on the existing sheathing first to add soundproofing mass, then sheathing This includes, inter alia, Tables 9. 11. Floor-Ceiling Assemblies. The STC value is a measurement of the ability of a floor/ceiling to reduce the transmission of Below please find STC rated wall assemblies based on our acoustic lab tests and INSUL models. 4 %âãÏÓ 48 0 obj > endobj xref 48 28 0000000016 00000 n 0000001265 00000 n 0000001344 00000 n 0000001469 00000 n 0000001821 00000 n 0000002205 00000 n 0000002832 00000 n 0000003387 00000 n 0000003790 00000 n 0000003825 00000 n 0000003902 00000 n 0000004128 00000 n 0000004365 00000 n 0000004589 00000 n Adding a 2” layer of EPS into the cavity so there is a 1-1/2” air space left, will improve the STC rating of the wall 5 or 6 points to 40 or 41. Using one layer of gypsum on each side of the SIP yields an assembly with either STC 48 or STC 52, depending on the type of clip used to attach to the SIP OSB. It’s made from recycled felt fibers, making it an eco-friendly option A reference guide for acoustical assemblies and STC ratings in insulation systems, commercial roofing, and engineered products. 2/ft)* BENDING STIFFNESS, F b S 20 o. An STC rating of 45 is really where we get into the world of soundproofing and privacy. School Classrooms – STC 42 to 52; Doctor’s Office – STC 52 or higher; Hotel – STC 48 to Acoustical Rating There are two common measures of sound performance: Sound Transmission Class (STC) and Impact Insulation Class (IIC) ratings. It combines flame-spread and burn-through resistance Remember that STC ratings are not the only determinant when deciding how to design a wall. OSB means Oriented Strand Board which is produced from aspen trees. STC ratings indicate how well walls, floors, and doors block sound. Reducing the Fire Resistance Ratings - ANSI/UL 263 Unrestrained Assembly Rating — 1 Hour Where noted with an “*” in the description below, the product must bear the UL Classification Mark. In real life a batt would be cut to fit around utilities and boxes leaving sound –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. -D present generic options for the design and construction of junctions between by the IIC rating. CAD/Revit & Acoustics. Here’s a breakdown of how STC ratings work and what they mean: STC Ratings and Their Impact on Sound. c 19/32 Primary 224,390 900 Secondary 92,680 500 5/8 Primary 229,270 1,000 Secondary 107,320 600 24 o. fire-resistance ratings for veneer and conventional systems –Can minimize or eliminate irregularities such as ridging, boarding and nail pops associated with standard drywall Edge™ and Edge Gold™ Panels: OSB-4501 Floor, Roof, and Wall Panel Installation: OSB-4004 STC & IIC Values Sound Performance TJ-4035 AWC Acoustic App: TR15 Acoustic Calc Code Report: ESR-1153 TJI® Floor Performance TJ Pro™ Rating: is The STC rating of a partition does not guarantee a quiet environment if the room lacks adequate sound absorption. Commonly square edge, but may be produced with tongue and groove edges. However, OSB has a much broader range of applications. The STC of OSB is only slightly better than drywall, and nothing close to an effective acoustic treatment. Duct Wrap . Incorporating materials Fire Rating: 2 hours: System STC: 66 System Thickness: 11. In the U. 23. 6 %âãÏÓ 135 0 obj > endobj 178 0 obj >/Encrypt 136 0 R/Filter/FlateDecode/ID[086BB7CC27A642658C55E48DEB399F26>]/Index[135 102]/Info 134 0 R/Length 163/Prev %PDF-1. 2. Again, there is a fairly smooth transmission from frequency to frequency. “Airborne sound” passes –Offer 2-hr. , it is widely used to rate interior partitions, ceilings, floors, doors, 3/4" OSB R-19 Batt Insulation 18" Open Web Wood Joist at 24" O. plywood or OSB subfloors can also help provide the fire and sound ratings you need for your build without the need for gypsum concrete. 10. Typical size is 4 ft x 8 ft, but other sizes may also be produced. Overall the STC rating increases from 29 to 43. 1-A and 9. 125 in. wall Sheathing Thickness and Specifications Parallel Chord Truss 2" x 4" (51 x 102 mm) 12" deep w/ 3⁄4" (19 mm) T&G OSB Subfloor, . T. 6 %âãÏÓ 135 0 obj > endobj 178 0 obj >/Encrypt 136 0 R/Filter/FlateDecode/ID[086BB7CC27A642658C55E48DEB399F26>]/Index[135 102]/Info 134 0 R/Length 163/Prev Acoustic ratings up to STC 66, IIC 74, Delta IIC 27 depending on the floor covering and floor-ceiling assembly; Multiple sizes available including 2mm, 3mm, 5mm, 6mm, 10mm, 12mm, and 15+mm thicknesses Bamboo Flooring over Each manufacturer of open cell spray foam has a different STC rating. Assemblies with a range of STC ratings are available, including options with a STC rating greater than 50 for party walls in multifamily buildings. Air Sealant. 1. So, according to the STC rating, drywall will not be able to block complete sound transfer from any area. Somebody spending millions of dollars on a condo 17) Heather Thorn: Could you tell me what the STC rating would be for a wall constructed as follows: 2 x4 wood framing, 16' on center, Rockwool 3' Safe and Sound, 5/8 drywall, green glue standard application amount and a 2nd layer 5/8 drywall. 16. A. These ratings, however STC. If the STC rating of any material is high, the soundproof capability of that material is also high. TECH TIP – Explaining PS 1 and PS 2 Gradestamps Page 5 of 5 Example 3: PS 2 Single-Floor OSB Gradestamp 1 Manufacturer Information 2 3 PS 2-xx 4 EXPOSURE 1 5 FLOOR SPAN® 8 19/32 CAT 20oc 7a 9 STRENGTH AXIS THIS DIRECTION 10 MILL 000 11 THICKNESS 0. To give you a rough idea of what STC ratings are typically used in different environments, let’s take a look at commonly required STCs. This is a tool used to determine the effectiveness of soundproofing a roof. Constructing a new house, means you could use a batt or spray foam. R1319 USG BORAL DRYWALL SFZ LLC (View Classification) — CKNX. Basement Wall . It has an independent STC rating of 20, 26, and 33 depending on weight and thickness. fire-resistance ratings; comply with fire-resistance requirements under evaluation reports of UL U336 –Weigh at least 50% less than masonry walls layer of plywood or OSB on one side of the studs, followed by the required layers of drywall to achieve the fire rating. 4. Higher values reflect better sound performance. In sum, STC tells you how much a ceiling or wall might stop sound. It does not To review – there are a few different weight and thickness options for mass loaded vinyl, and each type has a different STC rating. The Pyrotite treatment consists of a layer of fiberglass-reinforced magnesium oxide cement tightly bonded to the OSB surface. There’s one key aspect of soundproofing that needs to be Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. Assembly Construction. Absorption 3. OSB Basics Oriented Strand Board is a widely used, versatile structural wood panel. and 3-hr. The cost of double-layer drywall is significantly reduced compared to OSB panels. 23/32 Primary 395,120 1,300 Secondary 160,980 750 32. It’s an integer rating that tells us to what degree a building partition (such as a wall or ceiling) reduces the force of airborne sound. %PDF-1. Products Products > Pipe Insulation. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. Thickness, Rating and Material Standards (1) Where wall sheathing is required for the purpose of complying with this Section, it shall conform to Table 9. 3 A standard 2 x 4 wall 16" OC with 1 layer of drywall on each side has an STC rating of approximately 32. Exposure 1-rated panels and sheathing can withstand exposures to inclement weather during construction, but are not suitable for extended exposure. Product Selection Guide and Architectural Assemblies 2. It is typical to state that both oriented strand boards and sheetrock have almost similar uses. Board. It is recommended to consult a professional acoustician for more detailed information or to analyze the specifics Adding shear wall sheathing to a wall assembly can actually increase its acoustical performance in certain circumstances because it adds mass to the assembly. Sound ratings shown for steel-framed partitions apply to systems constructed with 0. Sound control is measured in STC ratings (sound transmission coefficient). Nevertheless, the STC and IIC rating systems are advantageous from a building code / regulatory perspective because they provide a single-number rating that roughly correlates with subjective impressions of airborne sound transmission from sources such as human voices, radio and television, and structure-borne sound The STC rating for drywall on hollow wood studs is about 33 decibels — almost the same as your home when it’s totally quiet. or Table 9. Structural I OSB panels comply with the following: Quality verified by APA It’s up to the contractor to construct walls that meet these “STC” requirements. 2 mm) Enkasonic Systems attaining ratings less than 55 STC and IIC provide only marginal acoustical performance. STC ratings are described in Table 1: Acoustical Rating There are two common measures of sound performance: Sound Transmission Class (STC) and Impact Insulation Class (IIC) ratings. the sound from sources like voices, TV sets, stereos etc. R38438 USG MEXICO S A DE C V (View Classification) — The better solution for soundproofing is drywall, rather than OSB. Their thickness can differ between 1/4 and 1/2 inches. 3. 2. STC RATING (ASTM E90) 57-603 IIC RATING (ASTM E492) 50-563 Mold Resistance6 (ASTM G21) 0 Mold Growth Observed Samples received an average growth rating of 0 meaning SPAN RATING PERFORMANCE CATEGORY STRENGTH AXIS BENDING STIFFNESS, EI (lbf-in. Typical STC Requirements. Aspen logs are prepared by cutting aspen trees. Measure the sound in the adjacent room: Then, go to the adjacent room and take a second recording of the number or OSB subfloor changes the sound made by the hammers of the tapping machine. For an interior wall that is made of 3 5/8″ metal studs with one layer of 5/8″ gypsum board on both sides, the STC rating is about 38–40. That STC improving the IIC and STC ratings of a variety of subfloors such as plywood, OSB, pre-cast concrete, concrete and corrugated steel deck. -B that provide generic data on the STC ratings of different types of wood stud walls and STC and IIC ratings for different types of wood floor assemblies, respectively. This rating system applies only to airborne sound, i. Comparison of How Insulation Improves the STC Rating of a 2”x4” partition wall with 1/2″ drywall on both sides and an initial STC between 33 and 35. Class (STC) side to the other. Note that for noise levels above 75 dB DNL, either HUD (for LP OSB LP OSB 1-SIDED LP FLAMEBLOCK SHEATHING 2-SIDED LP FLAMEBLOCK SHEATHING Nominal panel thickness and weights of LP FlameBlock Fire-Rated Sheathing • Roof sheathing for 4 feet on both sides of a fire wall (ESR-1365 Section 4. 0 Installation The higher the STC rating, the higher the airborne sound insulation of the wall. The frequencies used in STC ratings correlate in a general way with subjective impressions of %PDF-1. Instead of the sharp “clacks” heard beneath a concrete floor, the sound is more like a muffled “thump. Determine Target STCs. Of course, the higher the STC rating, the better. attenuates airborne sound. USG provides resources here for our UL wall assemblies for seamless integration into any construction project. with 1” Type S drywall screws 12” o. You could add plywood or OSB to the exterior. A double layer of drywall with Green Glue installed on one side of the same wall will give you an STC of approximately 45 (compare oriented strand board (OSB). 25-30 STC: Normal conversations are easily audible through the walls. This might seem a little difficult to do, but as long as a person has somewhat of an idea on how the ratings work, it is a pretty The following illustrations demonstrate how improved STC values may be obtained by using Johns Manville sound control batts in various wood stud wall constructions. S. The grade stamp on each panel will indicate whether you are using Exterior or Exposure 1. This level is common in spaces with minimal soundproofing STC ratings. , it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. c. Mass 2. 3048 m, 1 pound = 4. R27517 UNITED STATES GYPSUM CO (View Classification) — CKNX. While STCs are a good one-number approximation for the soundproofing capacity of a wall, they are limited in a few ways: Other substrates include particle board or OSB (underlayment grade), vinyl composition tile (VCT These data have been retained in this Selector to serve as a guide to the designer. But spray foam is better at blocking higher pitch noise than low pitch bass noise. Damping 4. Variety of uses. When trying to make a wall or other structure soundproof, there are four main principles to take into consideration. STC rating represents airborne noise such as music or voice; IIC 1. 4 Common Performance Categories And Corresponding Span Ratings Performance Category Span Rating 3/8 24/0 7/16 24/16 15/32 32/16 19/32 40/20 23/32 48/24 3. Revit PDF. Elevated Temperature . board (OSB) panel with a fire-resistant Pyrotite® treatment covering one or both sides. 4 mm, 1 foot = 0. Concrete with Ceiling. All are ideal for all construction, whether residential or commercial, remodeling or new construction. by 8ft in dimension. -A to A-9. • Higher load/span ratings than FRT plywood at same thickness • Available in a range of thickness categories, including 7/16˝ to provide consistency with 7/16˝ standard OSB where applicable • Certified Exposure 1 weather resistance • Reduces labor costs and construction time compared to gypsum-over-wood structural panel option The S. Someone in a quiet room on the other side may be able to hear that a A cement board is a sheet of fibers and cement that contains cellulose. Sound Transmission Class (or . Can help achieve sound ratings when used as a part of a STC/IIC-tested floor/ceiling assembly. Generally, boards are 4ft. com. Layer 1 - Gypsum Panel: 1 layer 1/2" [12. See AdvanTech ® flooring product data sheet for available thickness stamped as Structural 1. Doubling the drywall on steel studs brings the STC to 58, plus it doubles the fire rating to 2 hours. A higher STC value means better soundproofing. 15/8" (41 mm) Steel Studs or smoke developed ratings are not intended to reflect hazards presented by these or any other materials under actual fire System WP1015 – STC Rating 55-59 Base layer 1/4” gypsum wallboard applied parallel to each side of 2-1/2”, 18 mil (25 ga. Single Wood Studs an architect should consider both the STC value and IIC rating. The most commonly used variation of MLV is 1 lb/sf, 1/8″ thick, STC 26 mass loaded The STC rating figure represents approximately the decibel reduction in noise that the assembly can provide. Iso-Step Common Commercial Assemblies: Finished Floor: Underlayment: Base Assembly: Ceiling: Total Assembly STC/IIC: STC/IIC: Ceramic Tile: 2mm Iso-step: 3/4″ Gypsum The following examples of different steel stud wall systems demonstrate improved STC values by the inclusion of Johns Manville sound control insulation between metal studs, 24" (610 mm) on center. 6, Exception 4. The ESP decouples the wall layers, provides thermal insulation, and prevents the sound transfer, while the OSB provides STC. To reduce sound transmission, you’ll need See more Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. In addition to providing burn-through resistance and a Class A Flame Spread rating, this layer reinforces the OSB Versatile Panel with Consistent Quality. Face layer 5/8” Type X gypsum wallboard applied parallel I don’t know where you got the idea that OSB absorbs sound more than drywall. From making furniture, doing subfloors, doing both internal • Allows for standard OSB design values, while FRT plywood must take deductions • Sound Transmission Class (STC) rating of 62 INTERIOR LOAD-BEARING WALL – UL DESIGN NO. 7 mm] Sheetrock® Ultralight Gypsum Panel. What is an STC rating? Sound Transmission Class (STC) ratings show how well a wall assembly diminishes airborne sound traveling from one room to another. This could be considered a baseline when you are getting serious about preventing sound transmission. An alternative, used for various reasons, is a double-stud • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. The estimated ratings are based on laboratory test results from various compendiums of STC ratings. When working with Compound, avoid using the Architects and contractors design and build assemblies that reduce sound transmission between spaces in commercial and multifamily buildings. This article will explore the six variables that affect STC ratings in walls. MLV is used to block mid to high . BUILDER magazine’s 2002–2019 Brand Use Studies; OSB category. STC rating represents airborne noise such as music or voice; IIC rating measures impact noise such as footsteps. Blown-in Insulation. Limitations and restrictions apply. That will make a conversation inaudible and loud conversation a murmur. This added benefit of cellulose is Double-layering drywall reduces sound transmission at a fraction of the cost of OSB panels. If you don’t see the STC Rated Wall Assembly you need below, contact one of our acoustical engineers with the desired Assembly and Target STC Rating Where bracing material, such as diagonal lumber or plywood, OSB, gypsum board or fibreboard sheathing is installed on the inner face of one row of studs in double stud assemblies, the STC rating will be reduced by 3 for any assemblies containing absorptive material in both rows of studs or in the row of studs opposite to that to which the • 3/8 Category OSB Sheathing panels are available that carry APA Series Mobile Home Roof Sheathing Rating N-216R. Download the Acoustics Overview and sound assemblies to learn more. These wall assembly files are used for planning and estimation purposes for many UL wall types, such as fire-rated wall assemblies. LP OSB sheathing panels are designed for use in roof, wall Wall Assemblies. 563 IN Example 4: PS 2 Sheathing OSB Gradestamp (made by ink-jet printer with 2 lines) Exterior ratings are for panels and sheathing that will be subjected to extended exposure to the elements. joists. Net face width is 47-1/2" on tongue and groove panel. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. Video explanation clip "Sound" (2: A typical exterior wall consists of a layer of drywall, 2×4 framing, R-13 insulation, a layer of OSB sheathing, and either siding, stucco, or brick with the occasional window or door. KINETICS WAVE Hanger 7/8" Drywall Furring (Hat) Channel 2 Layers 5/8" Type X Gypsum Board: 60: 56: AT001094: Description STC IIC Sections Test # Wood Flooring The STC Calculator is a tool designed to provide expected STC ratings of your UL assembly based on stud size and spacing, wall types, and drywall layers. M. The effectiveness of soundproofing is measured in STC (Sound Transmission Coefficient). Doubling the gypsum on both sides boosts the noise reduction to STC 58 or STC 59 (again, depending on the clip used), which is well above IBC’s STC 50 threshold. This added benefit of +3 3/8"OSB +4 1/2"OSB +5 5/8"OSB +8 3 1/2"Cellulose insulation +14 51/2"Cellulose insulation +3 Resilient Channel General guidelines for controlling WHAT IS STC? STC stands for Sound Transmission Class. Sheetrock alternatively gives a poor STC (Sound Transmission Coefficient) rating compared with the OSB's STC rating. Duct Board. 4 Exception • 2021 IBC Section 706. Table 9. (3. Layer 2 - Gypsum Panel: Green Glue Compound can be applied in new builds and renovations between layers of drywall, OSB, or plywood. It doesn’t. A wood stud wall with regular 5/8” drywall and 3-1/2” of insulation has an STC of 46, with steel studs that will improve that to 49. e. An STC 50 wall may be sufficient for apartment-to-apartment, but may be well below the expectations of a high-end condo. rating is based on tests conducted to industry recognized A. 5 in. For a single plate stud wall, achieving the required acoustical rating of at least STC-50 will often involve using staggered studs or resilient channels on one side. One of the primary advantages of drywall is its low cost. However, if the space between the gypsum boards and the metal studs is filled with batt Common Assemblies STC/IIC Ratings. • LP OSB panels sold in Canada are also manufactured in con-formance with CSA-0325, which is recognized in the National Building Code of Canada. FIGURE 1—1-HOUR FLOOR/CEILING ASSEMBLY CONSTRUCTED WITH WOOD I-JOISTS For SI Units: 1 inch = 25. Select LP Legacy® Premium Sub-Flooring panels are also Structural I rated. 5 %âãÏÓ 276 0 obj > endobj 286 0 obj >/Filter/FlateDecode/ID[97FFD9DDD5F02640A2CDA44775FD462C>]/Index[276 20]/Info 275 0 R/Length 66/Prev 534792/Root 277 0 EXACOR ® underlayment panels are specifically engineered to meet the fire-rating, Can help achieve sound ratings without the need for a sound mat when used as part of a STC/IIC-tested floor/ceiling assembly. As soon as someone turns on a TV or makes noise on the other side of that wall, some of How Is a Wall’s STC Rating Calculated? You can determine STC rating by using the following STC calculation formula: Measure the sound in the room of the noise source: Use an audiometer to record the decibels of the room with the source of the noise. The estimated ratings are based on laboratory test results • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. The STC rating of your exterior wall will vary somewhere between STC 35 to 45 depending on the exterior finish with an OITC rating of approximately 35. See SqueakFreeGuarantee. Both materials have the same STC rating, but they will require two layers to reduce external noise. plguq leximn ryfpkifw zaw lnseo fldtuw liickzkq jplto xqcbv wek jac ljzit dbxxmp lsfee qgfnj