2024 Hilti firestopping

• See Hilti literature or third-party listings for complete application and installation details FILL, VOID OR CAVITY MATERIAL FOR USE IN THROUGH-PENETRATION FIRESTOP SYSTEMS SEE UL FIRE RESISTANCE DIRECTORY 66Y7 Technical Data 2” Device 4” Device OD (device only) 2.5" 4.5" OD (flange) 4.7" 6.7" ID (device only) 2.3" 4.3" Total …. Kroger ads weekly ads

This is a fantastic time to found a startup, but unless you plan to bootstrap it, you will still need to go through the laborious exercise of crafting a pitch deck. With so much ri... 6. hilti cp 767 speed strips or mineral wool safing (min. 4 pcf density) compressed 50%, flush with gypsum board surfaces. 7. minimum 1/8" (wet) thickness hilti cfs-sp wb firestop joint spray to completely cover mineral wool and overlapping minimum 1/2" onto gypsum board and ceiling runner, and minimum 2" onto fireproofing. notes : 1. CP 619 T Firestop putty roll. ultimate. Easily moldable firestop tape designed to help prevent fire and smoke from spreading through large openings. From $60.00. Compare. Back. website:smartbar.compare.label. Whether you need to firestop outlet boxes or small cable penetrations, you will find the solution here – our quick to install putty ...The penetration does not occur within a wall cavity. Construction Floor assembly is 8" thick concrete floor slab. We have two conditions. 1) At the Floor slab, we have a Fire rating requirement of 2-hr. 2) At the Roof Slab, we have a fire rating requirement of 1-hr. The penetrations are metallic pipe 6" dia. max.Our Hilti Button for Firestop software automates the whole design process, by identifying and placing 3D objects into your design – and helps you to integrate firestop into your building design right from the start. Our Hilti Firestop Documentation Manager helps you to document your installations on the jobsite and create detailed reports.Hilti Firestop Systems Page: 2 of 3 1. CONCRETE FLOOR ASSEMBLY: Max. 2 hour rated concrete floor assembly made from either lightweight or normal weight concrete with a density of 100-150 pcf, with a min. thickness of 4-1/2 in. at the joint face. Overall slab thickness may vary to accommodate various blockout4-11/16 x 4-11/16 x 1/4 in. Pack size. 50 pc. Log in to see your company prices. Prices vary for Hawaii, Alaska, and US Territories. Discounted net. From $229.00. Quantity. Box.CP 617 or CFS-P PA Firestop Putty Pads, for use with max 4 by 4 by max 2-1/8 in. flush device UL Listed Metallic Outlet Boxes installed with steel cover plates in 1 and 2 hr. fire rated gypsum wallboard wall assemblies framed with min 3-1/2 in. deep wood or steel studs and constructed asFirestop Training and Certification I am required to provide documentation that my personnel applying FS-ONE firestop are certified and trained by the manufacturer. How can I set up a training session?a. hilti cp 681 75/2" n tub box flange. b. hilti cp 681 sd-fd firestop drain flange (see note no. 2 below). 3. nominal 2" diameter pvc plastic drain pipe (schedule 40) (cellular or solid core) cemented into hilti firestop drain flange with pvc glue (provided by others). 4. pvc plastic shower fitting with chromed steel strainer (sized to ... Firestop blocks and plugs Search our pre-formed firestop blocks and plugs for cable, pipe and mixed penetrations, designed for easy repenetration while reducing dust and airborne fiber particles. Firestop boards Complete your fire protection installation with firestop boards approved for cables, pipes, and mixed penetration seals. Firestop blocks and plugs Search our pre-formed firestop blocks and plugs for cable, pipe and mixed penetrations, designed for easy repenetration while reducing dust and airborne fiber particles. Firestop boards Complete your fire protection installation with firestop boards approved for cables, pipes, and mixed penetration seals.The following sections include details for the various types of anchor channels and T-bolts that Hilti has to offer. Also included is the HAC Inventory Selector Resource to help guide specifiers on lead times for stock, non-stock and custom items. Select the products that meet your needs and download the details in PDF or DWG format.You don't want to be one of those tourists who ends up on Overheard New York, do you? Editor’s note: As the travel industry reopens following COVID-19 shutdowns, TPG suggests you t...It is important to have a method to consider movement and the impact on firestopping. The International Building Code requires a fire tested system for through-penetration firestopping in accordance with the ASTM E814 …CP 660 Flexible firestop foam. Easy-to-install flexible firestop foam to help create a fire and smoke barrier around for cable and mixed penetrations. Approx. cure time: 10 min. Application temperature range: 50 - 95 °F. Color: Red.For larger openings, Hilti’s Firestop Block provides a shape-to-fit solution. The product looks like a polyurethane brick, and it can be cut to fit around cable tray and conduit. Kusal said a large opening with 12 inches of annular space typically can’t be solved with a sealant, but he noted the block’s usefulness in such settings.Hilti Firestop Saving lives through innovation and education DBS 03/22 Product information FIRESTOP SELF LEVELING SILICONE SEALANT CFS-S SIL SL Product description • Self-leveling, single-component, silicone-based firestop sealant for use with through-penetrations as well as construction joints in floors. Product featuresHILTI CONSTRUCTION CHEMICALS, DIV OF HILTI INC — CP618 Firestop Putty Stick, CP 620 Fire Foam, CP 660 Firestop Foam, FS-One Sealant or FS-ONE MAX Intumescent Sealant. * Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL Certification (such as Canada), respectively. AFS-ONE MAX Firestop intumescent sealant. Ultimate. High-performance intumescent firestop sealant. LEED VOC: 9 g/l. Base materials: Concrete, Metal, Wood, Drywall. Application temperature range: 35 - 104 °F. More technical data. Customers also searched for fireproof , sealant , firestop or caulk.Hilti Firestop Selector App – Google Play Store Hilti Firestop Selector App – Apple App Store If you have any questions, please reach out to our customer service team at 1-800-879-8000 (US) or 1-800-363-4458 (Canada) for assistance. Fire Protection Design Team Hilti North America 3701 W. Royal Lane, Suite 100, Irving, TX 75063Advantages. One product for a variety of common through penetrations. Cost-effective and easy-to-use solution. W-rated systems available. Ethylene glycol-free. Industry leading …KeyCorp Looks Locked Out Right Now...KEY During Wednesday's Lightning Round of Mad Money one caller asked Jim Cramer about KeyCorp (KEY) . "This is a great company but that 7% yiel...needed for you and your crew. Certifications will be issued upon course completion. We hope this helps. Should you have any questions or require assistance, please call Customer Service for help at 1-800-879-8000 (US) or 1-800-363-4458 (Canada.) Thank you for choosing Hilti as your firestop experts! GC is asking for firestopping certification ... Title: Hilti_Firestop Application Handbook_6th edition.pdf Author: CHUIKIM Created Date: 8/20/2018 4:32:36 PM We have multiple one side solution firestop systems. Please see attached systems for metallic pipe and cable penetrations through gypsum and concrete/block walls. Regards, Cody. WL1205f.pdf145.19 KB. WL1206f.pdf151.56 KB. Firestop 101: A Life Safety Issue- On Demand Video. This course explains the need for firestop and provides an overview of how the model building codes are addressing the issue. Attendees should understand what firestopping is and why it’s needed, know the applicable code requirements related to firestop, and understand firestop system ... Firestop blocks and plugs Search our pre-formed firestop blocks and plugs for cable, pipe and mixed penetrations, designed for easy repenetration while reducing dust and airborne fiber particles. Firestop boards Complete your fire protection installation with firestop boards approved for cables, pipes, and mixed penetration seals. Identification signage for firestop installations, making them uniquely identifiable for monitoring and inspection purposes using Hilti Documentation Manager software. $24.75. Compare. Find all the accessories you need to complete your firestop and fire protection installations – designed to save lives, protect assets and improve building ...Firestop blocks and plugs Search our pre-formed firestop blocks and plugs for cable, pipe and mixed penetrations, designed for easy repenetration while reducing dust and airborne fiber particles. Firestop boards Complete your fire protection installation with firestop boards approved for cables, pipes, and mixed penetration seals.Firestop Life Safety Seminar: An Overview. This course provides a general introduction and review of firestop for project managers, contractors, and designers. Upon completing this session, the participant should understand the basics of firestopping, including the applicable codes and standards. Attendees should have a basic understanding of ...It is important to have a method to consider movement and the impact on firestopping. The International Building Code requires a fire tested system for through-penetration firestopping in accordance with the ASTM E814 …We are looking for a UL system to firestop the holes having a F Rating and T rating of 2 hours . The existing concrete floor is 2-1/2” concrete topping over 3” 20 ga. metal decking (overall thickness of 5-1/2”) and the size of the openings range from 10" x 18" and 14" x 60". In using your UL System finder tool it seem that there aren't ...CP 617 or CFS-P PA Firestop Putty Pads, for use with max 4 by 4 by max 2-1/8 in. flush device UL Listed Metallic Outlet Boxes installed with steel cover plates in 1 and 2 hr. fire rated gypsum wallboard wall assemblies framed with min 3-1/2 in. deep wood or steel studs and constructed asFirestop devices and sleeves. Explore our pre-formed firestop sleeves and cast-in devices, designed for easier installations and inspections when firestopping cable and pipe …Hilti Firestop Saving lives through innovation and education Product information DBS • 03/22 ... • Intumescent (expands when exposed to fire) firestop sealant that helps protect combustible and non-combustible penetrations for up to 4 hours fire rating Applications for use • For effectively sealing most common through penetrations in a ...Chase Sapphire Banking will replace Premier Platinum checking accounts, and benefits include waived ATM fees worldwide. Update: Some offers mentioned below are no longer available....This video shows you how to install Hilti CFS-BL Firestop Blocks in a large opening with cable tray application and how to re-penetrate cables when needed. ... Hilti Academy. Select a course and let the learning begin. If you have not yet registered, you will first be directed to our registration page. Visit Hilti Academy. Hilti has power tools, grinders, drills, and saws as well as fasteners, anchors, design and layout software and services for construction professionals. Inspired by the work of Instacart shoppers over the last few years, a handful of workers at Target-owned Shipt, a grocery delivery service, are beginning to organize. With the help...Hilti Firestop Saving lives through innovation and education Product information DBS • 03/22 HIGH-PERFORMANCE INTUMESCENT FIRESTOP SEALANT FS-ONE MAX Product description • Intumescent (expands when exposed to fire) firestop sealant that helps protect combustible and non-combustible penetrations for up to 4 hours fire rating Applications for useIndices Commodities Currencies StocksHilti Firestop Systems. System No. W-L-1410. WL 1410. 1. Wall Assembly — The 1 or 2 hr fire rated gypsum board/stud wall assembly shall be constructed of the materials and in the manner specified in the individual U300, U400, V400 or W400 Series Wall and Partition Designs in the UL Fire Resistance Directory and shall include the following<iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WN2QZ7Q" height="0" width="0" style="display: none; visibility: hidden" title="Google Tag Manager ...Movement capability of firestop systems. Hilti has successfully tested and certified a variety of our systems, from those that use sealants, such as FS-ONE Max, to those that use preformed devices, such as the speed sleeve CP 653 or firestop blocks CFS-BL. Being the first to market with 8 Underwriters Laboratories (UL) certified systems with M ...Complete your fire protection installation with firestop boards approved for cables, pipes, and mixed penetration seals CFS-COS Firestop composite sheet Thin stainless steel firestop composite sheet ideal for sealing large openingsHilti. Outperform. Outlast. Hilti, Inc. (U.S.) 1-800-879-8000 • www.us.hilti.com • en español 1-800-879-5000 • Hilti Firestop Systems Guide Introduction Applications and Products Selector Guide Through-Penetration Joint Reference Data Firestop Collar (CP 643N) Product description A ready-to-use firestop collar, made of a galvanized steel ...6. hilti cp 767 speed strips or mineral wool safing (min. 4 pcf density) compressed 50%, flush with gypsum board surfaces. 7. minimum 1/8" (wet) thickness hilti cfs-sp wb firestop joint spray to completely cover mineral wool and overlapping minimum 1/2" onto gypsum board and ceiling runner, and minimum 2" onto fireproofing. notes : 1.We will need the PDS and SDS for any products that will be coming into contact with our firestop products, along with a detailed description of how the products will be installed and interface. Hilti is proud to announce the launch of our engineering website, the HILTI CONSTRUCTION PLATFORM (HCP). This platform will be the home for all of your ...Firestop Training and Certification I am required to provide documentation that my personnel applying FS-ONE firestop are certified and trained by the manufacturer. How can I set up a training session?It is important to have a method to consider movement and the impact on firestopping. The International Building Code requires a fire tested system for through-penetration firestopping in accordance with the ASTM E814 or UL 1479 standards. The UL 1479/ASTM E814 test standards indicate that “The extended portions of the penetrating items on ...FIRESTOP 302: SPECIAL INSPECTION OF FIRESTOPPING Understanding and Complying with 2012, 2015 and 2018 IBC Requirements Raymond Prescott V Matthew Baker, CFPS Hilti, Inc. is a registered provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this … FIRESTOP SYSTEMS SEE UL FIRE RESISTANCE DIRECTORY 66Y7 FIRESTOP DEVICE FOR USE IN THROUGH-PENETRATION FIRESTOP SYSTEMS SEE UL FIRE RESISTANCE DIRECTORY Description 5N76 Technical Data Pipe outside dia (in.) Collar Collar No. of outside Height hooks and dia. (in.) (in.) fasteners CP 643-50/1.5"N 1.4–2.0 2.80.9 2 CP 643-63/2"N 2.0–2.5 3.41.3 2 Identifying the correct firestop system to meet project needs and requirements is critical during design and construction. Hilti has a one of the largest and most comprehensive …Ultimate. Easily moldable and reusable firestop putty designed to help create a fire and smoke barrier around cables and metal pipes. Approx. Density: 1.6 kg/m³. Color: Red. Surface burning characteristics UL 723 (ASTM E84): Flame spread: 15. Smoke development: 10. More technical data. Foam can be easily shaped during the curing process. Neat and tidy application. Very quick and easy to install and provides a reliable firestop seal with only one product. Maintenance and retrofitting of cables is very easy. Single-sided installation possible. Smoke-tightness and firestopping with one system. Need a new Hilti fire stop card. Please contact your local Hilti Field Representative or our Customer Service team at 1-800-879-8000 and they can put you in touch with your local Hilti Fire Protection Specialist. Being asked by a contractor to become firestop certified. CP 617 or CFS-P PA Firestop Putty Pads, for use with max 4 by 4 by max 2-1/8 in. flush device UL Listed Metallic Outlet Boxes installed with steel cover plates in 1 and 2 hr. fire rated gypsum wallboard wall assemblies framed with min 3-1/2 in. deep wood or steel studs and constructed asOur Hilti Button for Firestop software automates the whole design process, by identifying and placing 3D objects into your design – and helps you to integrate firestop into your building design right from the start. Our Hilti Firestop Documentation Manager helps you to document your installations on the jobsite and create detailed reports.Why is Hilti no. 1 for firestop solutions? Software Automate the most time-consuming tasks. Hilti Button for Firestop — Automatically identify penetrations, get firestop recommendations and generate reports. Get a free trial at hiltibutton.us.hilti.com (U.S.) or hiltibutton.hilti.ca (Canada) Firestop Documentation Manager (CFS-DM) — Plan and …Silicon-based fire caulk, providing a highly flexible firestop seal for construction joints and pipe penetrations. LEED VOC: 48 g/l. Base materials: Concrete, Masonry, Metal, Gypsum. Application temperature range: 35 - 104 °F. More technical data.Hilti Firestop Selection Chart — U.S. CONCRETE FLOORS/WALLS Penetrating Item(s) F-Rating T-Rating L-Rating W-Rating Product System Number [Similar FM Approved System] BLANK OPENINGS IN CONCRETE FLOORS/WALLS Max. 4” steel pipe sleeve 3 Hr Firestop Block C-AJ-0055 Max. 4” un-sleeved opening 3 Hr CP 618 C-AJ-0058 [hgf]Dry Hilti firestop solution THE IMPORTANCE OF PASSIVE FIRESTOP Passive fire protection is vital for creating a safer and code-compliant building. Compartmentation is a general safety requirement that applies to all buildings depending on their height and use class, regardless of their base material. The At Hilti, we go beyond just sitting in our offices. Our sales teams and field engineers meet our customers where they are, finding solutions to make builds safer, easier and faster. Over 30 years of experience in providing internationally approved and tested firestop systems, premium software and support to help save lives and buildings from fire. <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WN2QZ7Q" height="0" width="0" style="display: none; visibility: hidden" title="Google Tag Manager ...This video shows how to properly apply the Hilti CP 620 firestop foam according to UL approval.Check out our products available in your country: http://hilti...Firestop mortar to help prevent fire and smoke from spreading through large openings and load-bearing applications. From $473.00. Compare. Find firestop sealants, sprays, …<iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WN2QZ7Q" height="0" width="0" style="display: none; visibility: hidden" title="Google Tag Manager ...Firestop and fire protection. Over 30 years of experience in providing internationally approved and tested firestop systems, premium software and support to help save lives and buildings from fire. Firestop devices and sleeves Explore our pre-formed firestop sleeves and cast-in devices, designed for easier installations and inspections when ...For whatever its worth, my project's roofing system is composed of corrugated metal deck with lightweight insulated concrete encapsulating EPS insulation boards (REF: UL P921) FireStopping exterior rated wall, perimeter joint system. RATED WALL TRANSITION TO NON-RATED PARAPET WALL.JPG146.53 KB.Thank you for your question. We do have a few systems for firestopping a head of wall joint from one side of the wall. HW-D-0285 - Concrete or block wall to concrete over metal deck (flutes orientated perpendicular to wall) HW-D-0286 - Concrete or block wall to concrete over metal deck (flutes orientated parallel to wall) HW-D-0750 - Gypsum ...FS-ONE MAX Firestop intumescent sealant. Ultimate. High-performance intumescent firestop sealant. LEED VOC: 9 g/l. Base materials: Concrete, Metal, Wood, Drywall. Application temperature range: 35 - 104 °F. More technical data. Customers also searched for fireproof , sealant , firestop or caulk.Terms & Definitions Systems Specifiers Guide Excerpt of Firestopping Terms & Definitions 05/11/16 Volume Estimation Systems Specifiers Guide Excerpt of Firestop Volume Estimation Tables 05/11/16 HILTI SPECIFIERS GUIDE EXCERPTS - FIRESTOP *Revised May 12, 2016. Author: Bear, AshleyAt Hilti, we go beyond just sitting in our offices. Our sales teams and field engineers meet our customers where they are, finding solutions to make builds safer, easier and faster. Over 30 years of experience in providing internationally approved and tested firestop systems, premium software and support to help save lives and buildings from fire. 2. for walls constructed of steel studs larger than 3-5/8", firestop blocks should be installed 8" deep, recessed up to a maximum 1/2" from outer wall surfaces. 3. apply hilti fs-one max intumescent firestop sealant, hilti cp 618 firestop putty stick, hilti cp 620 fire foam, or hilti cp 660 firestop foam into any void Hilti Firestop Selection Chart — U.S. CONCRETE FLOORS/WALLS Penetrating Item(s) F-Rating T-Rating L-Rating W-Rating Product System Number [Similar FM Approved System] BLANK OPENINGS IN CONCRETE FLOORS/WALLS Max. 4” steel pipe sleeve 3 Hr Firestop Block C-AJ-0055 Max. 4” un-sleeved opening 3 Hr CP 618 C-AJ-0058 [hgf]Hilti Firestop Selector App – Apple App Store. If you have any questions, please reach out to our customer service team at 1-800-879-8000 (US) or 1-800-363-4458 (Canada) for assistance. Best Regards, Nate Crawford. Senior Fire Protection Engineer. EJ FAQ US 10.23.pdf724.85 KB. 0 Likes. 0 Comments. Firestopping around 8 girts and purlins at 8 ...It is important to have a method to consider movement and the impact on firestopping. The International Building Code requires a fire tested system for through-penetration firestopping in accordance with the ASTM E814 …Firestop and fire protection. Over 30 years of experience in providing internationally approved and tested firestop systems, premium software and support to help save lives and buildings from fire. Firestop devices and sleeves Explore our pre-formed firestop sleeves and cast-in devices, designed for easier installations and inspections when ... Can Hilti Firestop products be used over / on top of existing firestopping materials from other manufacturers? Thank you . firestop material, Hilti Firestop Products. Hilti Firestop Selector App – Google Play Store Hilti Firestop Selector App – Apple App Store If you have any questions, please reach out to our customer service team at 1-800-879-8000 (US) or 1-800-363-4458 (Canada) for assistance. Thank you for choosing Hilti! Ricardo Mejia Fire Protection Design Team Hilti North AmericaCP 606 Firestop acrylic sealant. Universal fire caulk, providing a flexible firestop seal for fire-rated joints and through penetrations. Customers also searched for flat concrete sealant , firestop sealant , top of wall sealant , bottom of wall sealant or joint sealant. FIRESTOP SYSTEMS SEE UL FIRE RESISTANCE DIRECTORY 66Y7 FIRESTOP DEVICE FOR USE IN THROUGH-PENETRATION FIRESTOP SYSTEMS SEE UL FIRE RESISTANCE DIRECTORY Description 5N76 Technical Data Pipe outside dia (in.) Collar Collar No. of outside Height hooks and dia. (in.) (in.) fasteners CP 643-50/1.5"N 1.4–2.0 2.80.9 2 CP 643-63/2"N 2.0–2.5 3.41.3 2 The penetration does not occur within a wall cavity. Construction Floor assembly is 8" thick concrete floor slab. We have two conditions. 1) At the Floor slab, we have a Fire rating requirement of 2-hr. 2) At the Roof Slab, we have a fire rating requirement of 1-hr. The penetrations are metallic pipe 6" dia. max.

Thank you for checking out Ask Hilti Thomas! Please see response below from Hilti Director, Codes and Standards, Ed Goldhammer. "Typically stacked electrical rooms can be treated as a shaft enclosure as long as they meet the prescriptive requirements of IBC Section 713 “Shaft Enclosures” and the proper fire resistance rating (2 hours for 4 stories …. Alachua publix

Science News highlights from the American Heart Association's Circulation journal article, "Home-Based Cardiac Rehabilitation" National Center 7272 Greenville Ave. Dallas, TX 75231...Hilti Anchors & Tools Simplify Ceiling Grid Installation In Post-Tension Concrete February 2nd, 2012 Anchoring grids to concrete ceilings is sometimes easier said than done.• See Hilti literature or third-party listings for complete application and installation details Order designation Sales pack quantity Item number CFS-BL Firestop Block 1 2030020 CFS-BL MC 20 3484119 CFS-BL Pallet 480 3541548 Dimensions Size (LxWxH) CFS-BL Firestop Block 8” x 5” x 2” (20x13x5cm) We develop and thoroughly test firestop products to provide additional value beyond firestopping and airflow control. Our firestop systems enhance the overall building performance in many areas. They meet the latest industry needs and are easy to install, retrofit and inspect. Our passive firestop solutions for hospitals help insulate the noise ... Plan, install and manage firestop solutions. Hilti's Firestop Selector can help trades, firestop specialty contractors and architects be more productive on the jobsite and in the office. Login using your Hilti Online credentials or register for a new account to: View more than 1,550 trusted firestop systems. Save systems to projects for submittal.Firestop Training and Certification I am required to provide documentation that my personnel applying FS-ONE firestop are certified and trained by the manufacturer. How can I set up a training session?We develop and thoroughly test firestop products to provide additional value beyond firestopping and airflow control. Our firestop systems enhance the overall building performance in many areas. They meet the latest industry needs and are easy to install, retrofit and inspect. Our passive firestop solutions for hospitals help insulate the noise ...Indices Commodities Currencies StocksHilti Firestop Systems Page: 2 of 3 1. CONCRETE FLOOR ASSEMBLY: Max. 2 hour rated concrete floor assembly made from either lightweight or normal weight concrete with a density of 100-150 pcf, with a min. thickness of 4-1/2 in. at the joint face. Overall slab thickness may vary to accommodate various blockoutThis video shows you how to properly apply Hilti CP 620 firestop foam.Check out our products available in your country: http://hilti.to/HiltiGroupHilti CP 62...CFS-CC Firestop cable collar Solution for renovation of sealed cable penetrations with 100% fill CFS-C EL firestop endless collar Solution to help create a fire and smoke barrier around pipes in non-standard configurations CP 645 firestop insulated sleeve Ready-to-use firestop sleeve made of mineral wool with intumescent additives CFS-B firestop ….

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