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Home My WebLink AboutDYIMS Fire Protection Narrative Report 4-01-21Fire Protection Narrative Report Page 1 VAV International, Inc.  400 W. Cummings Park, Suite 4700 Woburn, Massachusetts 01801 tel (781) 935-7228 fax (781) 935-1822 www.vavint.com Fire Prevention Officer April 1, 2021 Yarmouth Fire Department Yarmouth, MA 02664 Subject: Dennis-Yarmouth Intermediate/middle School 286 Station Avenue Yartmouth, MA 02664 Yarmouth, MA 02664 Dear Fire Prevention Officer, This letter will serve as confirmation that we have taken into consideration 780 CMR, 9th Edition, with regard to the design of the automatic fire sprinkler system and compliance with applicable codes at the above referenced location. Re: Basis (Methodology) of Design Section 1 - Building Description a. Building Use Group – Educational Use (E), Business (B), Storage (S-1), A-1, A-3 (Assembly) b. Total square footage – 185,711 SF c. Building Height – 2-Story building with various heights. Refer to code summary page G-0.10. d. Type of occupancies within the building - Offices, Classrooms, Mechanical, Kitchen, Gym, Cafeteria, Auditorium e. Type of construction – IIB non-combustible, Protected i. Hazardous material usage and storage - N/A j. High storage of commodities over 12-feet - N/A k. Site access for emergency vehicles - Access to the site is gained from Station Ave. Emergency response vehicles have access to all sides of the building. Section 2 – Applicable Laws, Regulations and Standards a. Town of Yarmouth Regulations. b. CMR 780, Commonwealth of Massachusetts Regulations (State Building Code), 9th Edition c. NFPA-13, 2013 Edition, “Installation of Sprinkler Systems” d. NFPA-10, “Portable Fire Extinguishers” e. NFPA-24, “Private Fire Service Mains and their Appurtenances” f. NFPA-72, 2013 Edition “National Fire Alarm Code” g. NFPA-25, “Inspection, Testing and Maintenance of Water-Based Fire Protection Systems” Fire Protection Narrative Report Page 2 h. M.G.L. Chapter 146, Section 81 through 89 and CMR 528, Section 11 and 12, (Sprinkler Contractor and Fitters Licensing Laws and Regulations). i. M.G.L. Chapter 148, Section 26G (Buildings or Additions; Automatic Suppressant or Sprinkler Systems) Section 3 – Design Responsibility for Fire Protection Systems a. The Professional Engineer(s) (FPE) fully designs and specify (develop a full system layout, design criteria and calculations), reviews and approves the installing contractors shop drawings and certifies the system installation for code compliance at completion. Section 4 - Fire Protection Systems to Be Installed a. Fire mains and hydrants - A new 6” fire service will be installed, tapped off a water loop around the building from the existing 10” main in Station Ave. The new fire service will be flushed, tested and certified by the underground contractor in accordance with the requirements of NFPA 24. Underground contractor shall provide a tap to the existing water main on Main Street. Sprinkler contractor or a licensed sprinkler piping fitter shall provide service into the building and piping to the site hydrants. b. Automatic sprinkler system and components - The sprinkler system work for this project includes the installation of a new backflow preventer and 6” shotgun riser assembly. The new 6” main feed will run multiple zones per floor. The building does not have any standpipes since they are not required per NFPA 13. One 4" Storz Fire Department Connections will be provided to the building. c. Installation of new sprinkler system as indicated on Fire Protection Drawings d. Design Requirements: Kitchen, Mechanical, Storage Rooms and Gym shall be hydraulically calculated in accordance with the requirements of NFPA 13 (2013 Edition) for an Ordinary Hazard Group 1 occupancy. The system shall be capable of providing a discharge density of 0.15 gpm/sf over a hydraulically remote area of 1500 SF and include an outside hose stream allowance of 250 GPM. Classroom, office, Gym and miscellaneous areas shall be hydraulically calculated in accordance with the requirements of NFPA 13 (2013 Edition) for a Light Hazard occupancy. The system shall be capable of providing a discharge density of 0.1 gpm/sf over a hydraulically remote area of 1500 SF and include an outside hose stream allowance of 100 GPM. Reductions in hydraulically remote areas due to the use of quick-response sprinklers have been taken into consideration as permitted by NFPA 13, 2013 Edition. Fire Protection Narrative Report Page 3 e. Fire alarm system and components - (refer to fire alarm narrative) f. Automatic fire extinguishing systems - N/A g. Manual suppression systems - Fire extinguishers per the requirements of NFPA-07. h. Smoke control/management systems - N/A i. Kitchen cooking equipment and exhaust systems - Hoods provided with an Ansul System. j. Emergency power equipment - Yes k. Hazardous material monitoring equipment - N/A Section 5 - Features used in design methodology a. Building occupant notification and evacuation procedures- Audiovisual alarm notification appliance devices will be provided where indicated on fire alarm drawings and shall be automatically activated by smoke detectors, heat detectors, sprinkler water flow devices or manual fire alarm boxes. b. Emergency response personal, site and system features- The fire department connection will be located at the south side of the building and within 100-ft of the nearest fire hydrant. The sprinkler riser station will be located in Water/fire service Room A103, on the first floor. c. Safguards, fire prevention and emergency procedures during construction- Fire extinguishers shall be placed in unprotected areas. d. Method for future testing and maintenance of systems and documentation- Owner will be responsible for enlisting the services of a UL listed central station company for testing and repairs to the fire alarm system and a licensed sprinkler contractor for testing and repairs in accordance with the requirements of NFPA-25 for all items relating to water supply and automatic sprinkler systems. Section 6 – Special Consideration and Description a. N/A (1.b) Sequence of Operation Section 1 a. A wet pipe system will protect the entire building. Thermally sensitive automatic sprinklers connected to fixed fire protection piping system filled with pressurized water from the public water supply are used in detecting a fire. When a fire occurs, the heat produced will fuse and operate sprinklers over the affected area distributing Fire Protection Narrative Report Page 4 water to control or extinguish the fire. As water flows through the system, a paddle type water flow detection device is activated, which in turn initiates the Fire Protective Signaling system. b. Refer to Fire Alarm Narrative for complete “sequence of operation”. c. All control, drain and test connections shall be provided with signs indicating their purpose. Sectional control valves shall have a sign indicating the portion of the system that is controlled by the valve. (1.c) Testing Criteria Section 1 - Testing Criteria a. The Fire Protection Contractor shall be responsible for coordinating the final acceptance testing, which shall be witnessed by the head of the fire department or his designee. b. The contractor shall also be responsible for insuring, and attest in writing that all equipment and devices have been tested as an entire system where such devices are integrated with the Fire Protective Signaling System. c. The Contractor will provide notification in writing to all code officials and public utility companies and personnel as to the specific dates and times to perform all required testing as a system or individual component testing. Section 3 - Equipment and Tools a. All above ground piping shall be hydrostatically tested per the requirements of NFPA-13 at 200 psi or 50 psi in excess of normal static pressure for 2-hours without loss of pressure utilizing a hydrostatic test pump. The amount of leakage in buried pipe shall be measured at the specified test pressure by pumping from a calibrated container. b. All control valves shall be fully closed and opened under system water pressure to ensure proper operation. c. Supervisory tamper switches shall be tested for proper operation by closing the control valve and verifying signal at fire alarm control panel. d. A main drain test shall be performed per the requirements of NFPA-13, by observing and recording the supply pressure gauge reading and then opening the main drain fully and again observing and recording the supply pressure gauge reading. e. The water flow detecting devices and associated alarm circuits shall be flow tested by opening the inspectors test connection, and shall result in an audible alarm on the premises and activation of the Fire Protective Signaling System within 60 seconds. Approval Requirements a. Written approval is required by Yarmouth Fire Department and Inspectional Services that the systems satisfy all operational code compliance requirements. Fire Protection Narrative Report Page 5 b. When a portion of the system fails to operate satisfactorily, that portion shall be corrected and pre-tested prior to rescheduling final acceptance test. c. Properly executed Material, Test, Performance and Completion Certificates will be provided by the installing contractor. If you have any questions please contact the undersigned. Sincerely, Semoon Oh, P.E. VAV International, Inc. 400 W. Cummings Park S. 4700 Woburn, MA 01801 (781) 935-7228