Residential NFPA 13D Fire Sprinkler Plan Revision and Hydraulic Calculations
Publicada el 2026-07-22
Descripción de la oferta
Project Location: San Diego County, California I am seeking an experienced residential fire sprinkler designer to revise an existing NFPA 13D fire sprinkler plan for a new single-family residence with a Junior Accessory Dwelling Unit, or JADU, in San Diego County, California. The existing fire sprinkler drawings were designed using a 1¼-inch fire meter and underground water service. However, Valley Center Municipal Water District installed the following: 1-inch fire meter 1-inch service lateral from the water main 1-inch auxiliary double-check assembly San Diego County Fire has directed me to submit revised fire sprinkler plans, hydraulic calculations, and product specification sheets directly to County Fire for review and approval. Existing Documents The current fire sprinkler package includes four sheets, F1 through F4. A limited pressure calculation appears on Sheet F2, but a complete, separate, node-by-node hydraulic calculation report was not provided. The selected designer must review the existing system layout and prepare a complete and defensible hydraulic calculation based on the actual installed 1-inch water service. The following documents can be provided: Existing F1 through F4 fire sprinkler drawings in PDF format Full approved architectural plan set Current architectural CAD files, if needed and available Water district confirmation of the installed fire service components Preliminary Project Information NFPA 13D residential sprinkler system New single-family residence with JADU Approximately 75 feet from the fire service connection to the building Approximately 14.5 feet of elevation rise from the service connection to the building Preliminary available pressure assumption: 50 psi, subject to verification by the designer Existing sprinkler head shown on plans: Senju RC-RES, K4.9 Actual installed fire meter, lateral, and auxiliary double-check assembly: 1 inch The designer must determine whether the private underground fire line should remain 1¼ inches downstream of the 1-inch meter or be revised to 1 inch. All final pipe sizes must be supported by the hydraulic calculations and acceptable to San Diego County Fire. Scope of Work The selected designer will be responsible for the following: Review the existing F1 through F4 fire sprinkler drawings and the latest approved architectural plans. Coordinate the sprinkler layout with the approved room dimensions, ceiling conditions, and building configuration. Revise the water-supply information to accurately reflect: 1-inch fire meter 1-inch service lateral 1-inch auxiliary double-check assembly Actual underground pipe length Actual elevation rise Prepare complete hydraulic calculations for the hydraulically most demanding sprinkler design area. Include all applicable pressure losses, including: Water meter loss Double-check or backflow assembly loss Underground fire-service piping Elevation loss Fittings and valves Interior sprinkler piping Sprinkler demand Provide a clear node-by-node hydraulic calculation report. Include an appropriate hydraulic safety margin above the minimum calculated system demand. Identify and correct any conflicting, incomplete, or unsupported flow and pressure information in the existing plans. Revise pipe sizes only where supported by the hydraulic calculations. Update all affected plan information, including: Riser diagram Water-supply information Pipe-size callouts Sprinkler-head callouts Notes Legends Material schedules Hydraulic reference points Design criteria Assemble the applicable product specification sheets for: Residential sprinkler heads Underground and interior piping Fire meter, if applicable Auxiliary double-check or backflow assembly Valves and other listed system components Prepare a clean and coordinated package suitable for direct submission to San Diego County Fire. Provide one reasonable correction cycle for County Fire comments related to this scope of work. Required Deliverables Corrected fire sprinkler plans in editable CAD format Print-ready fire sprinkler plan set in PDF format Complete hydraulic calculation report in PDF format Hydraulic calculation file in editable or native software format Applicable product specification sheets Brief revision log summarizing all changes made Response to one reasonable AHJ correction cycle related to the revised design Required Qualifications Please apply only if you have demonstrated experience with: NFPA 13D residential fire sprinkler system design Residential hydraulic calculations AutoSPRINK, Hydratec, or equivalent hydraulic calculation software California residential fire sprinkler requirements Preparing fire sprinkler plans for fire department or AHJ review Coordinating sprinkler drawings with architectural plans Information to Include With Your Proposal Please provide: Examples of similar NFPA 13D residential fire sprinkler plans Examples of complete hydraulic calculation reports The hydraulic calculation software you use Your experience with projects in California Your experience with San Diego County Fire or nearby jurisdictions, if any Your estimated cost and completion schedule Confirmation that editable CAD and native hydraulic calculation files will be provided Confirmation that one AHJ correction cycle is included Confirmation whether you are licensed or otherwise qualified to sign or certify the plans if required by San Diego County Fire The objective is to obtain a complete, accurate, and approvable NFPA 13D fire sprinkler package based on the actual installed 1-inch water service, and then provide the approved plans to a qualified contractor for installation. Here is the link to the full set of approved plan. https://drive.google.com/file/d/1SAH61SCj_BCHzcM0rpsOHxalHqewbCmq/view?usp=sharing
Skills
Fuente original: freelancer