1122 75TH ST SW SNO CO PUD 2023-08-08

f l Nferno To: subject: Date: cD JENSEN HUGHES Advancing the Science of Safety Capital Architects Snohomish Public Utilities District, 75th Street Business Center— Fire Protection Basis of Design April 11, 2022 Jensen Hughes has prepared this document to outline scope of work and design criteria considerations for the fire sprinkler system upgrades associated with the Connect UP project. This document is for the SnoPUD 75th Street Business Center located at 1122 75th Street Southwest in Everett, WA. The existing facility and Connect UP project include areas within two buildings located on the site. This memo is limited to the Connect UP project areas based on existing sprinkler system drawings and survey information. The electrical rooms hosting the fire alarm system control equipment and pathways to these rooms are also included within this scope of work. Structural, egress, and other analysis not related to the existing fire sprinkler systems installed at the 75th Street Business Center main and detached storage building have not been reviewed. Information provided within this document is intended to provide a general reference and outline for scope of work and design criteria considerations required to provide a code compliant fire sprinkler installation. The Contractor for the Connect UP project will provide a code compliant installation in accordance with the applicable codes. The applicable codes referenced include: • IBC (2018) — The International Building Code as amended by the Washington State Building Code (WSBC) and adopted by the City of Everett • IEBC (2018) — The International Existing Building Code as amended by the WSBC and adopted by the City of Everett • NFPA 13 (2016) — Standard for the Installation of Sprinkler Systems 1.o Existing Building Information The 751h Street Business Center includes a two-story office building (24,000 total square feet on Levels 1 and 2) with a detached storage/warehouse building (approximately 7,000 square feet). The overall general building classification is a Group B occupancy and the upper level of the office building was previously used as a Group A occupancy; the building will maintain the current permanent designation for use/occupancy. The Connect UP Program use for meter storage and distribution will be considered a temporary use. This memo is based on visual examination of the site by Walker Donuji and Elizabeth Graves, and information and documentation provided by site personnel. Jensen Hughes recommends that all Contractors review and field -verify the site and information to confirm the general scope of work and design.criteria considerations mentioned herein. 2.o Anticipated Fire Protection Basis of Resign The 751 Street Business Center Hydraulic Design Criteria Memo provides estimated hydraulic calculations and occupancy classifications. Based on information reviewed, it is anticipated that storage areas will require at least Ordinary Hazard Group II occupancy classification, modified from the existing Ordinary Hazard Group I installation. Modifications to the existing sprinkler system include the addition of sprinkler branchline piping and drops to extend sprinkler coverage where needed based on new ceilings, architectural changes, and use changes. The design and JIS jensenhughes.com