32 Main St Fire Protection Narrative 6-27-16
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Sprinkler Contractors and Designers
Established 1980
Fire Sprinkler portion of
Narrative Report
32 Main St. Renovation
32 Main St.
Northampton, MA.
By
Warehouse Mechanical Contractors, Inc.
MA. Sprinkler Contractors License SC 2254
Expires 11/23/2017
413-536-9222 Phone
413-535-2486 Fax
June 27, 2016
342 Britton Street − Chicopee, MA. 01020
Tel. (413) 536−9222 FAX (413) 535−2486
MA. Lic. 2254 & RI. 329
FIRE PROTECTION SYSTEMS NARATIVE REPORT
BASIS (METHODOLOGY) OF DESIGN
Section 1 – Building Description
a. Building "Use Group Mixed Use: B- Business (Basement & First Floor)
and R-2 Residential (Second-Fourth Floor)
b. Type(s) of occupancies (hazards within the building): Office/Retail and
Residential Apartments
c. Four stories above grade high point of building roof is 37'-0"
d. One story below grade
e. Basement- 1,592SF, First Floor-1,646 SF, Second-Fourth Floor- 1,674 SF,
Total 8,260 SF.
f. Storage: In accordance with NFPA-13 for miscellaneous storage under
12'-0" in height
The highest sprinkler flow requirement is .20 GPM over the most remote 945
square feet which requires 269.5 GPM@ 63.7 PSI at the base of the riser and
519.5 GPM@64.1 PSI at the connection to the city main
Water flow test is 128 PSI Static, 110 PSI Residual with 1,480 GPM flowing
Section 2 – Applicable Laws, Regulations and Standards
a. 780 CMR code sections "Fire Protection System Requirements"
903.2.0 Fire Suppression Systems
903.4.2 Requires audio visual alarm devices
903.4.1 Monitoring
b. NFPA Standards and Editions used for the design of each specific fire
protection system, NFPA 13, 2007; NFPA 72, 2007; NFPA 24, 2007
Section 3 –Design Responsibility for the Fire Protection Systems
Warehouse Mechanical Contractors, Inc. develops a full system layout, design criteria
and calculations and certifies the system installation for code compliance at completion.
Section 4 –Fire Protection Systems to be installed
a. Water supply will be taken from a new 6" water service that is
connected to the city main in Main St.
b. Sprinkler systems and components- Wet Sprinkler system
c. Fire alarm systems and components- audio and visual appliances installed
throughout in accordance with NFPA 72.
d. Manual suppression systems are not required
e. Seismic bracing is not required per the Massachusetts Building Code
f. Stortz fire department connection provided in accordance with the
Northampton Fire Department
All of the above items are required by regulations (780 CMR) all systems are new
901.2.1(1.a.ii) Sequence of Operation
Section 1
Wet sprinkler system:
System operates automatically upon the fusing of a single fire sprinkler. Operational
Sequence:
a. Wet system operates automatically on water flow from a single sprinkler.
Closed contacts on the flow switch will provide alarm contact for the fire
control panel and activate the local audible visual panels.
901.2.1(1.a.iii) Testing Criteria
Section 1- Testing Criteria in accordance with NFPA 13
System piping:
1. Hydrostatically test wet system piping at a pressure of 200 psi for
two hours without a loss of pressure
2. Conduct a full forward flow test of the backflow preventer at a rate of
269.5GPM
3. A 2" main drain test shall be conducted. Record static and residual
pressures on the test certificates
4. Conduct system operational and alarm test on the system from the
inspector's test connection in accordance with NFPA 13
5. Central station must receive the alarm and trouble signals
Warehouse Mechanical is in charge of setting up and conducting the testing. Warehouse
Mechanical will provide test certificates
Section 2- Equipment and Tools
a. Manufacturer's instructions
b. Approved narrative report, sequence of operations section
c. Flow measuring devices- pitot tube for backflow preventer full forward
flow test
d. Gauges- main riser for 2" drain and hydrostatic testing
e. Fire hose is required to direct backflow flushing
Section 3- Approval Requirements
a. Certification from Warehouse Mechanical Contractor's, Inc. stating that
the fire protection sprinkler system has been installed in accordance with
the approved fire protection construction documents and that he has
reviewed the as-built drawings for conformance to 780 CMR 901.7.4 and
has identified deviations if any, from the approved fire protection
construction documents.
b. Confirmation by the building owner/developer or authorized
representative that they have received the as-built sprinkler system shop
drawings from the installing contractor
c. Material Test, Performance and Completion Certificates, properly
executed by the installing contractor in accordance with the applicable
NFPA Standards.
d. Satisfactory functional test of all fire protection systems witnessed by the
Building official and the head of the fire department or their designees.