Loading...
HomeMy WebLinkAboutRFI 064 - HVAC questions - AZTDistribution to: OWNER X ARCHITECT X ENGINEER 13 Wheeling Ave Woburn, MA 01801 781-935-6100 REQUEST FOR INFORMATION NO. 64 PROJECT:OXOBOXO LOFTS RFI #64 INITIATION DATE:04/29/20 FROM:Maggiore Construction Corporation DATE NEEDED:05/06/20 13 Wheeling Avenue Woburn, MA 01801 REQUESTED BY:Gifford Perry EMAIL: gifford@maggiorecos.com TO:Paul B. Bailey Architect 110 Audubon Street New Haven, CT 06510 ATTENTION:Susan Odell- email: susan@pbbarchitect.com Frank Brachanow-Email Fbrachanow@dakotaPartners.net Sam Kirby SUBJECT: REQUEST: Controls: Drawing ABC-MB1.SBR3: Shows a flow switch, that flow switch will not fit in the 4” round ductwork. Also, the status indication run/failure for EF #3, Controls Contractor suggests providing a current switch in lieu of the flow switch/sensor for run/failure indication. Please advise. Building A: 1) Rooms with transfers: How far above the floor and how far from top of wall are the grilles supposed to be? 2) With regards to the exhaust ducts passing thru demising walls, is there a fire damper required and if so which type? Building B: 1) With regards to the exhaust ducts passing thru demising walls, is there a fire damper required and if so which type? Building C: 1) In unit C-1 the Kitchen Fan does not fit in the joist. Where and what should it be moved to? 2) Can locations for the exhaust fan roof curbs be located so Ductwork can start. Asking if we can pick a general location so we can run the ductwork close to that location. i.e. If curb is location above bathrooms we would get 1st floor ducts up and into that area and waiting for the roof. Or like other buildings do we keep them outside bathrooms to keep project moving? Maggiore answer-keep outside of bathrooms Building D & E: 1) Please advise as to the heights of the fans. 2) Please advise as to the duct layout below the beams for the 1st office and fitness. There is only 4” to top of windows. Please see the attached drawing. 3) Does the kitchen in the community room need or want an Exhaust Fan? Building J: 1) Unit J-8 please advice as to the parameters for a hole to be cut in the brick. For the square hole needs to be 12 ¼” x 6 ¼” hole. Building K: 1) The Mechanical room heat pumps return duct will fit one above the other. Can we go side by side instead? See attached detail. Answered By: Company:Date: Several HVAC questions The following responses correspond to the specific Buildings and their respective question numbers (if applicable) listed in RFI 64 above: ABC-MB1.SBR3: regarding EF-3 flow switch –Current switch installation with corresponding run/failure notification acceptable, submit for review and approval. Include all work on Project Record Drawings. A-1: regarding the return air transfer grilles -Install top of grille maximum 12” below finished ceiling on one side and bottom of grille maximum 12” above finished floor on the other (typical). Coordinate any specific requirements and locations with Architect. A-2 & B-2: regarding fire dampers in exhaust ducts through demising walls -The required rating in a building equipped throughout with automatic sprinklers is ½ hour for the demising walls & floors, which are fire partitions. See attached IBC Section 717.5.4, Exception 4 -fire dampers will not be required in exhaust ducts that are minimum 26 gage thickness and are run continuous from the fans to the outlet discharge (typical). C-1: regarding kitchen exhaust fan locations –if the joist structure doesn’t allow the fan to be recessed it shall be fastened to the ceiling and the duct run exposed to the discharge outlet (typical). C-2: regarding roof exhaust discharge/curb locations –General location outside of bathrooms is preferred, risers from 1st floor to be coordinated with architectural & structural (typical). D & E-1: regarding exhaust fan locations –if the joist structure doesn’t allow the fan to be recessed it shall be fastened to the ceiling and the duct run exposed to the discharge outlet (typical). E-2: regarding revised duct layout -Background has been updated with new Package Room, Community Room door, Fitness Room equipment, etc. Also, the fancoils are shown outside of the Mechanical Room for some reason. Contractor shall resubmit with layout revised per final background to install equipment in Mechanical Room and provide ductwork installation clearances as required, coordinate with Architect. E-3: regarding Community Room EF -No exhaust fan required since there is no stove in the kitchen. J-1: regarding cutting holes in the brick –Aztech believes Dan Morrissey (structural engineer) has already issued directions for holes in brick walls of this size so he was contacted.Dan Morrissey response -They are asking about a 12.25" x 6.25" hole. If that is 6.25" wide, and not close to any concentrated loads, no lintel is required. If it is 12.25" wide, away from concentrated loads, in an area where the brick is in good condition, and in a less visible area, no lintel is required. If the hole is 12.25" wide and the brick is in poor condition we need a 3.5" x 3.5" x1/4" lintel for each wythe of masonry. If there are concentrated loads I need to know the exact location. K-1: regarding Mechanical Room heat pumps –Detail is confusing, updated Mechanical plans show the return air ducts side by side already, acceptable sizes would be 18x10 or 16x12. Also, the supply air ducts per new plans are 14” round. Contractor to review latest plans and install equipment and ductwork so that service and access clearances are maintained. FIRE AND SMOKE PROTECTION FEATURES 2015 INTERNATIONAL BUILDING CODE® COMMENTARY 7-111 The conditions for the exception are the same.Exception 4 is the counterpart to Exception 1.3.One exempts the fire damper and one exempts thesmoke damper.Exception 5 exempts fire dampers and combinationfire/smoke dampers from kitchen and clothes dryerexhaust systems that are installed in accordance withthe IMC. This is to recognize the hazards associatedwith obstructing the airflow for these installations. TheIMC requires a shaft for multifloor kitchen and clothesdryer exhaust systems and requires 22-inch (559mm) sub-ducts and special construction in accor-dance with Section 504.8 of the IMC. The fact that firedampers and combination fire/smoke dampers arenot required does not exempt the requirement forsmoke dampers. However, Exception 2 of this sec-tion can be used. 717.5.4 Fire partitions. Ducts and air transfer openings thatpenetrate fire partitions shall be protected with listed firedampers installed in accordance with their listing. Exceptions: In occupancies other than Group H, firedampers are not required where any of the followingapply: 1. Corridor walls in buildings equipped throughoutwith an automatic sprinkler system in accordancewith Section 903.3.1.1 or 903.3.1.2 and the duct isprotected as a through penetration in accordancewith Section 714. 2. Tenant partitions in covered and open mall build-ings where the walls are not required by provisionselsewhere in the code to extend to the underside ofthe floor or roof sheathing, slab or deck above. 3. The duct system is constructed of approved materi-als in accordance with the International MechanicalCode and the duct penetrating the wall complieswith all of the following requirements: 3.1. The duct shall not exceed 100 square inches (0.06 m2). 3.2. The duct shall be constructed of steel notless than 0.0217 inch (0.55 mm) in thick-ness. 3.3. The duct shall not have openings that com-municate the corridor with adjacent spacesor rooms. 3.4. The duct shall be installed above a ceiling. 3.5. The duct shall not terminate at a wall regis-ter in the fire-resistance-rated wall. 3.6. A minimum 12-inch-long (305 mm) by0.060-inch-thick (1.52 mm) steel sleeveshall be centered in each duct opening. Thesleeve shall be secured to both sides of thewall and all four sides of the sleeve with minimum 11/2-inch by 11/2-inch by 0.060- inch (38 mm by 38 mm by 1.52 mm) steelretaining angles. The retaining angles shallbe secured to the sleeve and the wall with No. 10 (M5) screws. The annular spacebetween the steel sleeve and the wall open-ing shall be filled with mineral wool battingon all sides. 4. Such walls are penetrated by ducted HVAC systems,have a required fire-resistance rating of 1 hour orless, and are in buildings equipped throughout withan automatic sprinkler system in accordance withSection 903.3.1.1 or 903.3.1.2. For the purposes ofthis exception, a ducted HVAC system shall be aduct system for conveying supply, return or exhaustair as part of the structure’s HVAC system. Such aduct system shall be constructed of sheet steel notless than No. 26 gage thickness and shall be continu-ous from the air-handling appliance or equipment tothe air outlet and inlet terminals. Fire dampers are required when a duct or air transferopening penetrates a fire partition, and must be listedfor the fire rating of the partition and installed inaccordance with the listing. Please note that corridorwalls, where required to be separated by Section1020.1, must have duct penetrations or transferopenings protected with smoke dampers unlessexempted by Section 717.5.4.1. This section includesfour exceptions to the fire damper requirement.Exception 1 addresses fire-resistance-rated corri-dor walls. In fully sprinklered buildings, corridor wallpenetrations by ducts or air transfer openings neednot have fire dampers but they still are required tohave smoke dampers by Section 717.5.4.1 unlessfurther exempted there. Remember that duct penetra-tions that are exempted from fire dampers arerequired by Section 717.1.2 to have through-penetra-tion firestops [see Commentary Figure 717.5.4(1)].Exception 2 coordinates with Exception 4 to Sec-tion 708.4 and addresses standard constructiondesigns for mall buildings as they relate to open ceil-ing spaces. The exception removes an impliedrequirement for dampers where logic would dictatenone is required. This provision recognizes that wallsseparating tenants in a covered mall are required tobe rated but are allowed to stop at unrated ceilingsand storefronts, providing no true separation. There-fore, it does not make sense to require a damperthrough the wall. If the tenant separation wall isrequired to be continuous to a roof deck or rated floorassembly for another purpose, the fire damperswould obviously be required.Exception 3 states that fire dampers are notrequired where a steel duct penetrates a wall butdoes not have openings serving adjacent rooms orspaces [see Commentary Figure 717.5.4(2)] Thisexception has several criteria, one of which is to uti-lize a steel sleeve with mineral wool batting on allsides. Steel ducts have been shown to have the abil-ity to remain in place during severe fire exposures.With no openings into the corridor to allow for smokeand heat transfer in the protected corridor enclosure,a fire damper is not necessary to attain the requiredfire performance of the penetration. Copyright © ICC. ALL RIGHTS RESERVED. Accessed by Paul Bailey (office@pbbarchitect.com), ( -) Order Number #100598841 on Oct 11, 2018 8:17:51 AM pursuant to License Agreement with ICC. Nofurther reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. FIRE AND SMOKE PROTECTION FEATURES 7-112 2015 INTERNATIONAL BUILDING CODE® COMMENTARY Exception 4 is similar to Exception 1. Exception 4exempts all ducted penetrations of all fire partitionsand not just corridor wall penetrations. Exception 4, inaddition to the sprinkler provision, requires all steelducts and does not allow flexible duct connectors. Forcorridors, Exception 1 is easier. Both exceptionswould require through-penetration protection inaccordance with Section 717.1.2. Exception 4 is iden-tical to Exception 3 for fire barrier duct penetrations inSection 717.5.2. 717.5.4.1 Corridors. Duct and air transfer openings that pen-etrate corridors shall be protected with dampers as follows: 1. A corridor damper shall be provided where corridorceilings, constructed as required for the corridor wallsas permitted in Section 708.4, Exception 3, are pene-trated. 2. A ceiling radiation damper shall be provided where theceiling membrane of a fire-resistance-rated floor-ceil- Figure 717.5.4(1) FIRE DAMPERS—EXCEPTION 1 Figure 717.5.4(2) FIRE DAMPERS—EXCEPTION 3 Copyright © ICC. ALL RIGHTS RESERVED. Accessed by Paul Bailey (office@pbbarchitect.com), ( -) Order Number #100598841 on Oct 11, 2018 8:17:51 AM pursuant to License Agreement with ICC. Nofurther reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . D/E/F Services Group, LTD 1171 Voluntown Road Griswold, CT 06351 Phone: (860) 376-4896 Fax: (860) 376-1213 Request for Information RFI #: 004 To: Gifford Perry Fax: (781) 933-8044 From: Date: 4/23/2020 Project: F29179 - F29179 Oxoboxo Pages: CC: Return by: 4/30/2020  Urgent  For Review  Please Comment  Please Reply  Please Recycle Controls: Drawing ABC-MB1.SBR3: Shows a flow switch, that flow switch will not fit in the 4” round ductwork. Also, the status indication run/failure for EF #3, Controls Contractor suggests providing a current switch in lieu of the flow switch/sensor for run/failure indication. Please advise. Building A: 1) Rooms with transfers: How far above the floor and how far from top of wall are the grilles suppsed to be? 2) With regards to the exhaust ducts passing thru demising walls, is there a fire damper required and if so which type? Building B: 1) With regards to the exhaust ducts passing thru demising walls, is there a fire damper required and if so which type? Building C: 1) In unit C-1 the Kitchen Fan does not fit in the joist. Where and what should it be moved to? 2) Can locations for the exhaust fan roof curbs be located so Ductwork can start. Askiing if we can pick a general location so we can run the ductwork close to that location. i.e. If curb is location above bathrooms we would get 1st floor ducts up and into that area and waiting for the roof. Or like other buildings do we keep them outside bathrooms to keep project moving? Building D & E: 1) Please advide as to the heights of the fans. 2) Please advice as to the duct layout below the beams for the 1st office and fitness. There is only 4” to top of windows. Please see the attached drawing. 3) Does the kitchen in the community room need or want an Exhaust Fan? Building J: 1) Unit J-8 please advide as to the parameters for a hole to be cut in the brick. For the square hole needs to be 12 ¼” x 6 ¼” hole. Building K: 1) The Mechancial room heat pumps return duct will fit one obove the other. Can we go side by side instead? See attached detail. 1 A B 2 14"Ø SA12"Ø SA 10"Ø SA14"Ø RAG-200 G-200 F-100 F-100 F-100 F-100 R7-800 14"Ø RAR7-800 G-200 F-100 F-100 F-100F-50F-50 F-100 F-100 Project: Prepared By: Date: Reviewed By: PROFESSIONAL STAMPDIBATTISTOASSOCIATES, llcDHVLJQ EQJLQHHULQJ CUHDPHU\ BURRN, CW. , ZZZ.GLEDWWLVWR.cRPD.E.F SERVICES GROUP VRlXQWRZQ RRDG, GULVZRlG, CT OXOBOXO LOFTSBuilding E Level 142 Pink RowUncasville, CTCAB 26 April 2020 Mechanical Duct Building E Level 1 Scale:1/2" = 1'-0" F-1 27 Apr 2020 DWG NO. K1.1 D.E.F Services Group 1171 Voluntown Road Griswold, CT 06351 Building K Mechanical Room