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Rigsbee Engineering
Projects
We specialize in fire protection and structural engineering services across a variety of industries. Click any of the projects below to learn more about the services provided.
200 MWh BESS Facility, Los Angeles County
Alternative Means and Methods Report / Risk Analysis
An energy developer hired Rigsbee Engineering to prepare an Alternative Means and Methods Report (AMMR) and perform a performance-based fire and explosion risk analysis for the battery energy storage system (BESS) at a project site in Los Angeles County. The installation utilized battery enclosures with nonstandard protection systems, reducing the potential for gas buildup. However, the design did not incorporate traditional heat, smoke, or gas detection systems. To ensure compliance with Los Angeles County’s Energy Storage System Performance-Based Guideline, Rigsbee Engineering reviewed UL 9540A test data at the cell, module, and unit levels and used this information to model thermal runaway scenarios and analyze gas composition under simulated fire conditions.
The analysis evaluated key parameters required by Los Angeles County, including separation distances between enclosures and property lines, explosion overpressure and projectile hazards, and toxic and flammable gas plume dispersion modeling. Using advanced computational techniques, Rigsbee Engineering demonstrated that the system met all applicable performance-based safety objectives without requiring physical modifications. The approved AMMR allowed the client to move forward with project implementation confidently-maintaining code compliance, optimizing site layout, and confirming the inherent safety of the system at the project site.
An energy developer hired Rigsbee Engineering to prepare an Alternative Means and Methods Report (AMMR) and perform a performance-based fire and explosion risk analysis for the battery energy storage system (BESS) at a project site in Los Angeles County. The installation utilized battery enclosures with nonstandard protection systems, reducing the potential for gas buildup. However, the design did not incorporate traditional heat, smoke, or gas detection systems. To ensure compliance with Los Angeles County’s Energy Storage System Performance-Based Guideline, Rigsbee Engineering reviewed UL 9540A test data at the cell, module, and unit levels and used this information to model thermal runaway scenarios and analyze gas composition under simulated fire conditions.
The analysis evaluated key parameters required by Los Angeles County, including separation distances between enclosures and property lines, explosion overpressure and projectile hazards, and toxic and flammable gas plume dispersion modeling. Using advanced computational techniques, Rigsbee Engineering demonstrated that the system met all applicable performance-based safety objectives without requiring physical modifications. The approved AMMR allowed the client to move forward with project implementation confidently-maintaining code compliance, optimizing site layout, and confirming the inherent safety of the system at the project site.
Warehouse & Manufacturing Facility
High Piled Storage / Hazardous Materials Inventory Statement / Sprinkler Design
Rigsbee Engineering was engaged to assist with reclassifying a portion of the client’s warehouse from an H-3 (high-hazard) occupancy to an S-1 (moderate-hazard storage) occupancy. The previous tenant had designated the area as H-3 for unknown reasons, but the classification no longer aligned with client’s operations. The space was separated from the rest of the facility by a one-hour fire barrier with non-functional roll-down fire doors, resulting in compliance issues during inspection. Rigsbee Engineering worked closely with the local fire department to remove the unneeded H-3 classification and bring the facility into compliance.
During this process, the client also required assistance obtaining a High Piled Storage (HPS) permit, preparing a Hazardous Materials Inventory Statement (HMIS), and upgrading the warehouse fire sprinkler system to protect stored commodities at higher rack elevations. Rigsbee Engineering conducted detailed site documentation, developed HPS plans, classified materials for HMIS compliance, and designed an ESFR sprinkler system tailored to the facility’s unique roof geometry. Through this coordinated effort, the client achieved full fire and life-safety compliance while improving protection performance and operational flexibility within the warehouse.
Rigsbee Engineering was engaged to assist with reclassifying a portion of the client’s warehouse from an H-3 (high-hazard) occupancy to an S-1 (moderate-hazard storage) occupancy. The previous tenant had designated the area as H-3 for unknown reasons, but the classification no longer aligned with client’s operations. The space was separated from the rest of the facility by a one-hour fire barrier with non-functional roll-down fire doors, resulting in compliance issues during inspection. Rigsbee Engineering worked closely with the local fire department to remove the unneeded H-3 classification and bring the facility into compliance.
During this process, the client also required assistance obtaining a High Piled Storage (HPS) permit, preparing a Hazardous Materials Inventory Statement (HMIS), and upgrading the warehouse fire sprinkler system to protect stored commodities at higher rack elevations. Rigsbee Engineering conducted detailed site documentation, developed HPS plans, classified materials for HMIS compliance, and designed an ESFR sprinkler system tailored to the facility’s unique roof geometry. Through this coordinated effort, the client achieved full fire and life-safety compliance while improving protection performance and operational flexibility within the warehouse.
Fueling Facility
Code Consulting & Alternative Means and Methods Report
Rigsbee Engineering was hired to provide code consulting services and develop an Alternative Means and Methods Report (AMMR) for a fueling facility in California. The project involved converting the site’s existing liquefied natural gas (LNG) system to a compressed natural gas (CNG) system supplied directly by a municipal gas line. The upgraded design expanded fueling capacity, enabling multiple vehicles to refuel simultaneously over extended periods. During plan review, the fire department required the addition of new on-site fire hydrants to meet fire flow demand; however, the city’s water infrastructure could not supply the required 3,500 gpm flow rate without exceeding velocity limits, and the proposed hydrant upgrades were estimated to cost over $1 million.
Rigsbee Engineering analyzed applicable fire codes and system parameters, demonstrating that the conversion from LNG to CNG reduced on-site fire risk by eliminating high-energy fuel storage and introducing inherently safer infrastructure. The AMMR detailed how water-based suppression was not the preferred method for such hazards and outlined the system’s compensating safety features. After thorough review, the fire department approved the AMMR, eliminating the need for costly water system upgrades or additional hydrants. This approval allowed the client to move forward with their fueling system conversion, achieving full regulatory compliance and significant cost savings while enhancing operational safety.
Rigsbee Engineering was hired to provide code consulting services and develop an Alternative Means and Methods Report (AMMR) for a fueling facility in California. The project involved converting the site’s existing liquefied natural gas (LNG) system to a compressed natural gas (CNG) system supplied directly by a municipal gas line. The upgraded design expanded fueling capacity, enabling multiple vehicles to refuel simultaneously over extended periods. During plan review, the fire department required the addition of new on-site fire hydrants to meet fire flow demand; however, the city’s water infrastructure could not supply the required 3,500 gpm flow rate without exceeding velocity limits, and the proposed hydrant upgrades were estimated to cost over $1 million.
Rigsbee Engineering analyzed applicable fire codes and system parameters, demonstrating that the conversion from LNG to CNG reduced on-site fire risk by eliminating high-energy fuel storage and introducing inherently safer infrastructure. The AMMR detailed how water-based suppression was not the preferred method for such hazards and outlined the system’s compensating safety features. After thorough review, the fire department approved the AMMR, eliminating the need for costly water system upgrades or additional hydrants. This approval allowed the client to move forward with their fueling system conversion, achieving full regulatory compliance and significant cost savings while enhancing operational safety.
Lane Community College
System Risk Analysis
Lane Community College hired Rigsbee Engineering to perform a campus-wide risk analysis and evaluation of the existing Mass Notification System (MNS) in support of the new Health Professions Building project. The study was required by the Authority Having Jurisdiction (AHJ) as a condition for obtaining a Certificate of Occupancy prior to the start of the fall semester. Rigsbee Engineering developed and analyzed emergency scenarios in accordance with NFPA 72, NFPA 551, NFPA 1660, and applicable guidance documents to evaluate the MNS’s expected performance during various emergencies. Each scenario was ranked by risk severity and probability of occurrence, with deviations from current code requirements identified for corrective action.
A qualitative risk assessment was conducted using NFPA and military risk matrix methodologies to determine overall system risk levels and prioritize mitigation measures. Rigsbee Engineering provided detailed recommendations to reduce risk to acceptable thresholds, including improvements to event-specific messaging, command center functionality, and system survivability verification. The final Mass Notification System Risk Analysis Report addressed AHJ comments related to notification layering, outdoor coverage, and emergency messaging. As a result of Rigsbee Engineering’s expedited analysis and clear recommendations, Lane Community College achieved AHJ approval, secured its Certificate of Occupancy, and successfully opened the Health Professions Building before the start of the academic term.
Lane Community College hired Rigsbee Engineering to perform a campus-wide risk analysis and evaluation of the existing Mass Notification System (MNS) in support of the new Health Professions Building project. The study was required by the Authority Having Jurisdiction (AHJ) as a condition for obtaining a Certificate of Occupancy prior to the start of the fall semester. Rigsbee Engineering developed and analyzed emergency scenarios in accordance with NFPA 72, NFPA 551, NFPA 1660, and applicable guidance documents to evaluate the MNS’s expected performance during various emergencies. Each scenario was ranked by risk severity and probability of occurrence, with deviations from current code requirements identified for corrective action.
A qualitative risk assessment was conducted using NFPA and military risk matrix methodologies to determine overall system risk levels and prioritize mitigation measures. Rigsbee Engineering provided detailed recommendations to reduce risk to acceptable thresholds, including improvements to event-specific messaging, command center functionality, and system survivability verification. The final Mass Notification System Risk Analysis Report addressed AHJ comments related to notification layering, outdoor coverage, and emergency messaging. As a result of Rigsbee Engineering’s expedited analysis and clear recommendations, Lane Community College achieved AHJ approval, secured its Certificate of Occupancy, and successfully opened the Health Professions Building before the start of the academic term.
Medical Office Building
Atrium Smoke Control Analysis
As part of a fire alarm replacement project at a large medical center in California, Rigsbee Engineering was engaged to evaluate the smoke control requirements for a three-story atrium medical office building. The scope included a site investigation, review of historical building permits and plans, and identification of deficiencies in the existing system—specifically a severely undersized exhaust fan. Using LiDAR scanning, Rigsbee Engineering developed a 3D model of the space and conducted computational fluid dynamics (CFD) modeling using Fire Dynamics Simulator (FDS) to assess smoke behavior and exhaust requirements under fire conditions.
The analysis determined that the atrium’s third-floor rated roll-down smoke and fire barrier effectively reduced the volume to a two-story atrium, which under current code did not require an active mechanical smoke control system. This discovery, supported by rigorous analysis and code justification, allowed the medical center to eliminate the need for a costly 100,000+ CFM exhaust system, along with associated controls, fire alarm panel integration, and weekly testing requirements. The resulting design revision saved the client several hundred thousand dollars in construction and ongoing maintenance costs while maintaining full compliance with fire and life safety codes.
As part of a fire alarm replacement project at a large medical center in California, Rigsbee Engineering was engaged to evaluate the smoke control requirements for a three-story atrium medical office building. The scope included a site investigation, review of historical building permits and plans, and identification of deficiencies in the existing system—specifically a severely undersized exhaust fan. Using LiDAR scanning, Rigsbee Engineering developed a 3D model of the space and conducted computational fluid dynamics (CFD) modeling using Fire Dynamics Simulator (FDS) to assess smoke behavior and exhaust requirements under fire conditions.
The analysis determined that the atrium’s third-floor rated roll-down smoke and fire barrier effectively reduced the volume to a two-story atrium, which under current code did not require an active mechanical smoke control system. This discovery, supported by rigorous analysis and code justification, allowed the medical center to eliminate the need for a costly 100,000+ CFM exhaust system, along with associated controls, fire alarm panel integration, and weekly testing requirements. The resulting design revision saved the client several hundred thousand dollars in construction and ongoing maintenance costs while maintaining full compliance with fire and life safety codes.
120 MWh BESS Facility, Texas
Hazard Mitigation Analysis / Failure Modes and Effects Analysis
An energy developer hired Rigsbee Engineering to prepare a comprehensive Hazard Mitigation Analysis (HMA) and Failure Modes and Effects Analysis (FMEA) for a large-scale battery energy storage system (BESS) installation. The purpose of the study was to evaluate potential fire, explosion, and system failure risks in accordance with NFPA 855 and the International Fire Code (IFC). The project utilized battery enclosures and cells, and UL 9540A test data were reviewed at the cell, module, and unit levels to characterize thermal runaway behavior, gas composition, and fire propagation potential.
The report included an extensive code review, site-specific hazard assessment, and product-level system evaluation, addressing factors such as environmental conditions, seismic and wind design parameters, gas detection, fire suppression, ventilation, deflagration venting, and emergency response systems. Through the combined HMA and FMEA, Rigsbee Engineering identified credible failure scenarios, assessed their likelihood and consequences, and developed mitigation strategies to align with AHJ requirements. The resulting analysis provided the client and local fire authorities with a data-driven foundation for risk management and design validation, ensuring the safe and compliant operation of the energy storage system at the project site.
An energy developer hired Rigsbee Engineering to prepare a comprehensive Hazard Mitigation Analysis (HMA) and Failure Modes and Effects Analysis (FMEA) for a large-scale battery energy storage system (BESS) installation. The purpose of the study was to evaluate potential fire, explosion, and system failure risks in accordance with NFPA 855 and the International Fire Code (IFC). The project utilized battery enclosures and cells, and UL 9540A test data were reviewed at the cell, module, and unit levels to characterize thermal runaway behavior, gas composition, and fire propagation potential.
The report included an extensive code review, site-specific hazard assessment, and product-level system evaluation, addressing factors such as environmental conditions, seismic and wind design parameters, gas detection, fire suppression, ventilation, deflagration venting, and emergency response systems. Through the combined HMA and FMEA, Rigsbee Engineering identified credible failure scenarios, assessed their likelihood and consequences, and developed mitigation strategies to align with AHJ requirements. The resulting analysis provided the client and local fire authorities with a data-driven foundation for risk management and design validation, ensuring the safe and compliant operation of the energy storage system at the project site.
City of Downey - Space Shuttle
Code Consulting / Fire Suppression Analysis / Alarm Design
The City of Downey hired Rigsbee Engineering to design a fire protection and alarm system for a temporary structure housing the Space Shuttle Inspiration mock-up. Because the shuttle artifact was highly sensitive to water damage, a traditional wet sprinkler system was not appropriate. Instead, a pre-action fire suppression system was required to protect the exhibit while satisfying fire code requirements. The project also presented a structural challenge, as the weight of the suppression system had to remain within the non-structural load limits of the building. Rigsbee Engineering collaborated closely with the structural engineer to ensure the design maintained compliance while keeping the system weight below the allowable capacity.
Rigsbee Engineering analyzed multiple dry and pre-action system options, ultimately recommending a configuration that met code, functional, and structural criteria. Following the analysis, the City retained R.E. to provide fire alarm design, incorporating continuous air sampling smoke detection, as well as the design of the pre-action suppression system and a new site fire water lateral. The final design provided a balanced solution that achieved fire code compliance, artifact preservation, and constructability within the project’s structural and operational constraints.
The City of Downey hired Rigsbee Engineering to design a fire protection and alarm system for a temporary structure housing the Space Shuttle Inspiration mock-up. Because the shuttle artifact was highly sensitive to water damage, a traditional wet sprinkler system was not appropriate. Instead, a pre-action fire suppression system was required to protect the exhibit while satisfying fire code requirements. The project also presented a structural challenge, as the weight of the suppression system had to remain within the non-structural load limits of the building. Rigsbee Engineering collaborated closely with the structural engineer to ensure the design maintained compliance while keeping the system weight below the allowable capacity.
Rigsbee Engineering analyzed multiple dry and pre-action system options, ultimately recommending a configuration that met code, functional, and structural criteria. Following the analysis, the City retained R.E. to provide fire alarm design, incorporating continuous air sampling smoke detection, as well as the design of the pre-action suppression system and a new site fire water lateral. The final design provided a balanced solution that achieved fire code compliance, artifact preservation, and constructability within the project’s structural and operational constraints.
Renewables Logistics Facility
High Piled Storage Permit and Code Analysis
A renewables distributor hired Rigsbee Engineering to assist with obtaining a High Piled Storage (HPS) permit for existing warehouse racking after an inspector from the City of North Palm Springs identified unpermitted high-piled storage. Upon review, it was determined that the correct Authority Having Jurisdiction (AHJ) was actually the City of Desert Hot Springs. To initiate the project, Rigsbee Engineering conducted a site visit and 3D scan of the facility to document as-built conditions, evaluate stored commodities, and inspect the existing fire sprinkler and alarm systems. Using point cloud data, detailed floor and site plans were developed, and the fire sprinkler system was confirmed to be designed for Ordinary Hazard Group 2 protection.
After reviewing the client’s inventory list and manufacturer data, Rigsbee Engineering determined that most commodities were classified as High-Hazard Group A plastics, which exceeded the protection capabilities of the existing sprinkler system for storage above 12 feet. To help the client determine the most practical path forward, R.E. prepared an HPS code analysis report outlining two options: upgrading the fire sprinkler system or modifying the storage configuration. Given the cost implications of a system upgrade, the client elected to reclassify the warehouse as low-piled storage and signed a letter of intent confirming the change. Rigsbee Engineering coordinated directly with the third-party plan checker, addressing multiple rounds of review, updating structural calculations, and appending foundation plans as needed. The project concluded with AHJ approval, allowing the client to maintain operational compliance without costly infrastructure modifications.
A renewables distributor hired Rigsbee Engineering to assist with obtaining a High Piled Storage (HPS) permit for existing warehouse racking after an inspector from the City of North Palm Springs identified unpermitted high-piled storage. Upon review, it was determined that the correct Authority Having Jurisdiction (AHJ) was actually the City of Desert Hot Springs. To initiate the project, Rigsbee Engineering conducted a site visit and 3D scan of the facility to document as-built conditions, evaluate stored commodities, and inspect the existing fire sprinkler and alarm systems. Using point cloud data, detailed floor and site plans were developed, and the fire sprinkler system was confirmed to be designed for Ordinary Hazard Group 2 protection.
After reviewing the client’s inventory list and manufacturer data, Rigsbee Engineering determined that most commodities were classified as High-Hazard Group A plastics, which exceeded the protection capabilities of the existing sprinkler system for storage above 12 feet. To help the client determine the most practical path forward, R.E. prepared an HPS code analysis report outlining two options: upgrading the fire sprinkler system or modifying the storage configuration. Given the cost implications of a system upgrade, the client elected to reclassify the warehouse as low-piled storage and signed a letter of intent confirming the change. Rigsbee Engineering coordinated directly with the third-party plan checker, addressing multiple rounds of review, updating structural calculations, and appending foundation plans as needed. The project concluded with AHJ approval, allowing the client to maintain operational compliance without costly infrastructure modifications.
UC Riverside, Speith Hall
Fire and Life Safety Assessment
Rigsbee Engineering was part of a multidisciplinary team engaged by the University of California, Riverside (UCR) to perform a facilities assessment and develop rehabilitation recommendations for Spieth Hall, an 85,000-square-foot academic building. As part of the overall evaluation, Rigsbee Engineering conducted a comprehensive fire and life safety assessment, which included on-site inspections and system analyses. The scope encompassed review of the fire sprinkler and standpipe systems, hose reels, fire pump, and fire alarm system, as well as verification and augmentation of findings from the client’s internal assessment team.
In addition to the fire protection systems, Rigsbee Engineering evaluated the building’s egress system, emergency lighting and power, hazardous materials management, and elevator safety features. The result was a comprehensive fire and life safety report detailing site findings, system conditions, and code compliance gaps, along with recommendations for corrective actions and modernization. The assessment provided UCR with a clear, prioritized roadmap for upgrading Spieth Hall’s life safety infrastructure in alignment with current codes and campus standards.
Rigsbee Engineering was part of a multidisciplinary team engaged by the University of California, Riverside (UCR) to perform a facilities assessment and develop rehabilitation recommendations for Spieth Hall, an 85,000-square-foot academic building. As part of the overall evaluation, Rigsbee Engineering conducted a comprehensive fire and life safety assessment, which included on-site inspections and system analyses. The scope encompassed review of the fire sprinkler and standpipe systems, hose reels, fire pump, and fire alarm system, as well as verification and augmentation of findings from the client’s internal assessment team.
In addition to the fire protection systems, Rigsbee Engineering evaluated the building’s egress system, emergency lighting and power, hazardous materials management, and elevator safety features. The result was a comprehensive fire and life safety report detailing site findings, system conditions, and code compliance gaps, along with recommendations for corrective actions and modernization. The assessment provided UCR with a clear, prioritized roadmap for upgrading Spieth Hall’s life safety infrastructure in alignment with current codes and campus standards.
College of the Sequoias
Fire Sprinkler System Design Review and Resolution
A C-16 fire sprinkler contractor hired Rigsbee Engineering to provide technical support after encountering delivery issues caused by design flaws in the fire sprinkler systems across three new campus buildings at the College of the Sequoias. The project’s initial Division of the State Architect (DSA)-approved sprinkler plans and specifications did not include a fire pump, and system flow was based on limited city water pressure. A third-tier subcontractor under the C-16 contractor had produced hydraulic calculations that incorrectly indicated a pump was unnecessary—an error that went undetected during approval.
During installation, it became apparent that the city’s water supply was insufficient to operate the system as designed. The C-16 contractor brought in Rigsbee Engineering to investigate the issue. Through a comprehensive review of the approved plans, hydraulic calculations, and municipal water data, Rigsbee Engineering identified the calculation errors and collaborated with the design team to develop a corrective solution. While the revised analysis confirmed the need for a fire pump, site planning constraints left no available space for new equipment. Rigsbee Engineering worked closely with the city to negotiate infrastructure improvements that increased system flow and pressure, allowing the buildings to meet fire protection requirements without installing a fire pump. The result was a fully functional, compliant sprinkler system serving Buildings D, E, and F—delivered without major redesign or costly field modifications.
A C-16 fire sprinkler contractor hired Rigsbee Engineering to provide technical support after encountering delivery issues caused by design flaws in the fire sprinkler systems across three new campus buildings at the College of the Sequoias. The project’s initial Division of the State Architect (DSA)-approved sprinkler plans and specifications did not include a fire pump, and system flow was based on limited city water pressure. A third-tier subcontractor under the C-16 contractor had produced hydraulic calculations that incorrectly indicated a pump was unnecessary—an error that went undetected during approval.
During installation, it became apparent that the city’s water supply was insufficient to operate the system as designed. The C-16 contractor brought in Rigsbee Engineering to investigate the issue. Through a comprehensive review of the approved plans, hydraulic calculations, and municipal water data, Rigsbee Engineering identified the calculation errors and collaborated with the design team to develop a corrective solution. While the revised analysis confirmed the need for a fire pump, site planning constraints left no available space for new equipment. Rigsbee Engineering worked closely with the city to negotiate infrastructure improvements that increased system flow and pressure, allowing the buildings to meet fire protection requirements without installing a fire pump. The result was a fully functional, compliant sprinkler system serving Buildings D, E, and F—delivered without major redesign or costly field modifications.
LA Metro Center Street
Fire and Life Safety Design
The LA Metro Center Street Project involved the design/build delivery of a new, state-of-the-art operations center in the Los Angeles Arts District, serving as the central hub for LA Metro’s security operations, dispatch, and emergency coordination. The $200 million project was led by S.J. Amoroso Construction Co., LLC, with team members Owen Group/Bureau Veritas, Bali Construction, and Rigsbee Engineering. Rigsbee Engineering was responsible for the fire and life safety system design and the engineering of the underground fire water tank. Throughout the project, Rigsbee Engineering served as a strategic consultant, collaborating with multiple disciplines, contractors, and Metro officials to translate complex programmatic requirements into coordinated, constructible solutions.
The facility’s designation as the Emergency Security Operations Center for LA Metro introduced several unique design challenges. One of the most critical components was the design of an underground fire water storage and distribution system. To meet these specialized requirements, Rigsbee Engineering developed a gravity-fed HDPE piping system that connected the underground water tank to a vertical turbine fire pump well with an open-air gap configuration, supported by an automatic refill system. Acting as both fire protection and civil engineering consultant, Rigsbee Engineering coordinated the system’s integration across trades, ensuring compliance with applicable codes, specifications, and long-term operational needs. The project was successfully delivered to LA Metro, meeting all safety, performance, and expansion objectives.
The LA Metro Center Street Project involved the design/build delivery of a new, state-of-the-art operations center in the Los Angeles Arts District, serving as the central hub for LA Metro’s security operations, dispatch, and emergency coordination. The $200 million project was led by S.J. Amoroso Construction Co., LLC, with team members Owen Group/Bureau Veritas, Bali Construction, and Rigsbee Engineering. Rigsbee Engineering was responsible for the fire and life safety system design and the engineering of the underground fire water tank. Throughout the project, Rigsbee Engineering served as a strategic consultant, collaborating with multiple disciplines, contractors, and Metro officials to translate complex programmatic requirements into coordinated, constructible solutions.
The facility’s designation as the Emergency Security Operations Center for LA Metro introduced several unique design challenges. One of the most critical components was the design of an underground fire water storage and distribution system. To meet these specialized requirements, Rigsbee Engineering developed a gravity-fed HDPE piping system that connected the underground water tank to a vertical turbine fire pump well with an open-air gap configuration, supported by an automatic refill system. Acting as both fire protection and civil engineering consultant, Rigsbee Engineering coordinated the system’s integration across trades, ensuring compliance with applicable codes, specifications, and long-term operational needs. The project was successfully delivered to LA Metro, meeting all safety, performance, and expansion objectives.
Retail Dispensary
Alternative Means and Methods Report
Planet 13, located in Santa Ana, California, is the nation’s largest cannabis dispensary. The Orange County Fire Authority (OCFA) identified concerns that decorative umbrellas suspended from the ceiling might obstruct sprinkler coverage. Rigsbee Engineering was hired to conduct a site survey and prepare an Alternative Means and Methods Report (AMMR) to evaluate the umbrellas’ impact on the fire protection system. The team documented the umbrellas’ size, placement, and proximity to sprinkler heads, then performed a small-scale burn test using one of the actual umbrellas to assess its performance under heat exposure. The results showed that the umbrellas would rapidly melt and disintegrate when exposed to fire, demonstrating that they would not act as fixed obstructions to sprinkler discharge.
As part of the analysis, Rigsbee Engineering reviewed NFPA 13 requirements, which define obstructions as fixed elements that interfere with sprinkler discharge. Because the umbrellas were hung by fishing wire and allowed to move freely, they did not qualify as fixed obstructions. Additional review revealed that the existing sprinkler system was designed to Ordinary Hazard Group 2 standards—exceeding the required design density for the low-hazard retail space—further supporting the case for code compliance. The team also evaluated egress distances, confirming that travel paths remained within allowable limits even under an un-sprinklered condition. Based on these findings, the AMMR concluded that the umbrellas posed no adverse impact to fire safety. Only minor corrective actions—such as removing sprinklers attached to decorative piping—were required, allowing Planet 13 to retain its design aesthetic while maintaining full compliance with fire protection and life safety standards.
Planet 13, located in Santa Ana, California, is the nation’s largest cannabis dispensary. The Orange County Fire Authority (OCFA) identified concerns that decorative umbrellas suspended from the ceiling might obstruct sprinkler coverage. Rigsbee Engineering was hired to conduct a site survey and prepare an Alternative Means and Methods Report (AMMR) to evaluate the umbrellas’ impact on the fire protection system. The team documented the umbrellas’ size, placement, and proximity to sprinkler heads, then performed a small-scale burn test using one of the actual umbrellas to assess its performance under heat exposure. The results showed that the umbrellas would rapidly melt and disintegrate when exposed to fire, demonstrating that they would not act as fixed obstructions to sprinkler discharge.
As part of the analysis, Rigsbee Engineering reviewed NFPA 13 requirements, which define obstructions as fixed elements that interfere with sprinkler discharge. Because the umbrellas were hung by fishing wire and allowed to move freely, they did not qualify as fixed obstructions. Additional review revealed that the existing sprinkler system was designed to Ordinary Hazard Group 2 standards—exceeding the required design density for the low-hazard retail space—further supporting the case for code compliance. The team also evaluated egress distances, confirming that travel paths remained within allowable limits even under an un-sprinklered condition. Based on these findings, the AMMR concluded that the umbrellas posed no adverse impact to fire safety. Only minor corrective actions—such as removing sprinklers attached to decorative piping—were required, allowing Planet 13 to retain its design aesthetic while maintaining full compliance with fire protection and life safety standards.
20MW BESS Facility, New Jersey
Fire and Thermal Runaway Gas Hazard Analysis
Rigsbee Engineering performed a fire and gas hazard analysis for an existing battery energy storage facility that was constructed prior to the establishment of NFPA 855 and the local adoption of Chaper 12 in the International Fire Code (IFC). The original battery enclosures lacked UL 9540A test data, Rigsbee Engineering conducted detailed research on the Nickel Manganese Cobalt (NMC) battery chemistry to determine a heat release rate (HRR) associated with a thermal runaway event. The HRR values were then adjusted to reflect the specific energy capacity of the battery cells installed at the project site.
Using advanced fire and gas dispersion modeling, Rigsbee Engineering evaluated fire spread between enclosures under both calm and prevailing wind conditions and analyzed the performance of the Novec 1230 clean agent suppression system. Additional simulations assessed CO and hydrogen gas accumulation to verify compliance with NFPA 855 guidelines, which require maintaining flammable gas concentrations below a percentage of the Lower Flammability Limit (LFL). The analysis provided our client and project stakeholders with a comprehensive understanding of potential fire dynamics, suppression system effectiveness, and gas detection performance, supporting informed design and operational decisions to enhance safety at the project site.
Rigsbee Engineering performed a fire and gas hazard analysis for an existing battery energy storage facility that was constructed prior to the establishment of NFPA 855 and the local adoption of Chaper 12 in the International Fire Code (IFC). The original battery enclosures lacked UL 9540A test data, Rigsbee Engineering conducted detailed research on the Nickel Manganese Cobalt (NMC) battery chemistry to determine a heat release rate (HRR) associated with a thermal runaway event. The HRR values were then adjusted to reflect the specific energy capacity of the battery cells installed at the project site.
Using advanced fire and gas dispersion modeling, Rigsbee Engineering evaluated fire spread between enclosures under both calm and prevailing wind conditions and analyzed the performance of the Novec 1230 clean agent suppression system. Additional simulations assessed CO and hydrogen gas accumulation to verify compliance with NFPA 855 guidelines, which require maintaining flammable gas concentrations below a percentage of the Lower Flammability Limit (LFL). The analysis provided our client and project stakeholders with a comprehensive understanding of potential fire dynamics, suppression system effectiveness, and gas detection performance, supporting informed design and operational decisions to enhance safety at the project site.
Manufacturing Facility
Fire Master Plan, Fire Alarm & Fire Sprinkler Design, Hazard Materials Inventory Statement and Management Plan
This project supported the relocation of the client’s butyl tape manufacturing operations from the City of Industry to a new facility in the City of La Habra, California. Rigsbee Engineering provided comprehensive fire protection consulting and design services, including the development of a Fire Master Plan (FMP), conceptual fire alarm and sprinkler system designs, High Piled Storage (HPS) analysis, Hazardous Materials Inventory Statement (HMIS), Hazardous Materials Management Plan (HMMP), and assistance with the City of La Habra fire inspection package required for business licensing. The property consisted of two buildings which required a new system design and underground connection.
Our scope included defining fire department access, hose pull distances, and turnaround conditions, as well as designing and structurally engineering a cantilever canopy to satisfy Fire Department clearance requirements. Rigsbee Engineering also prepared the conceptual fire sprinkler and alarm layouts for contractor bidding and designed the HPS, HMIS, and HMMP packages in accordance with both LA County Fire Department and City of La Habra Building and Safety requirements. Through detailed coordination with multiple reviewing agencies, our team successfully obtained approvals and delivered a fully code-compliant fire protection framework to support the client’s safe and efficient transition into their new manufacturing facility.
This project supported the relocation of the client’s butyl tape manufacturing operations from the City of Industry to a new facility in the City of La Habra, California. Rigsbee Engineering provided comprehensive fire protection consulting and design services, including the development of a Fire Master Plan (FMP), conceptual fire alarm and sprinkler system designs, High Piled Storage (HPS) analysis, Hazardous Materials Inventory Statement (HMIS), Hazardous Materials Management Plan (HMMP), and assistance with the City of La Habra fire inspection package required for business licensing. The property consisted of two buildings which required a new system design and underground connection.
Our scope included defining fire department access, hose pull distances, and turnaround conditions, as well as designing and structurally engineering a cantilever canopy to satisfy Fire Department clearance requirements. Rigsbee Engineering also prepared the conceptual fire sprinkler and alarm layouts for contractor bidding and designed the HPS, HMIS, and HMMP packages in accordance with both LA County Fire Department and City of La Habra Building and Safety requirements. Through detailed coordination with multiple reviewing agencies, our team successfully obtained approvals and delivered a fully code-compliant fire protection framework to support the client’s safe and efficient transition into their new manufacturing facility.
LAX Police Locker
Industry: Transportation, Airport
Services: Air-Flow and Pressurization Modeling
Analyzed the airflow for 56 lockers in a double-row and T-shaped offshoot with an exhaust plenum above. The HVAC system exhausts air through each locker and out through the plenum above. A 3D model was analyzed in Fire Dynamics Simulator and another model was analyzed in Contam. These results were provided to the mechanical contractor to validate their proof of concept and general design parameters. Results were provided in video format showing pressure, and flow through the lockers and plenum.
Services: Air-Flow and Pressurization Modeling
Analyzed the airflow for 56 lockers in a double-row and T-shaped offshoot with an exhaust plenum above. The HVAC system exhausts air through each locker and out through the plenum above. A 3D model was analyzed in Fire Dynamics Simulator and another model was analyzed in Contam. These results were provided to the mechanical contractor to validate their proof of concept and general design parameters. Results were provided in video format showing pressure, and flow through the lockers and plenum.
Los Angeles County Coroner's Office
Industry: Municipality
Services: Fire & Life Safety Assessment
The Department of Public Works utilizes a deferred maintenance program for this facility. Our Assessment was used to ensure continued safety of county employees. Deficiencies and corrective actions were reported pertaining to the building, fire, and life safety systems.
Services: Fire & Life Safety Assessment
The Department of Public Works utilizes a deferred maintenance program for this facility. Our Assessment was used to ensure continued safety of county employees. Deficiencies and corrective actions were reported pertaining to the building, fire, and life safety systems.
W 82nd St., Los Angeles
Industry: Residential, Multi-Family
Services: Fire Sprinkler Design
This fire sprinkler project was for a 3 story modular 3-story residential building constructed of reconditioned shipping containers.
Services: Fire Sprinkler Design
This fire sprinkler project was for a 3 story modular 3-story residential building constructed of reconditioned shipping containers.
cBase
Industry: Oil & Gas
Services: Third Party Fire Protection Report
A site survey was completed on for multiple wells and out buildings on the leased land. A third party fire protection report including a hazardous materials management plan (HMMP) and a hazardous materials inventory statement (HMIS).
Services: Third Party Fire Protection Report
A site survey was completed on for multiple wells and out buildings on the leased land. A third party fire protection report including a hazardous materials management plan (HMMP) and a hazardous materials inventory statement (HMIS).
AGMG Endoscopy Center
Industry: Healthcare
Services: Physical Environmental Checklist (PEC), Fire Risk Assessment, Inspection, Maintenance and Testing Report
Facility Certification with AAAHC and CMCS
Associated Gastroenterology Medical Group and AGMG Endoscopy Center, an ambulatory care facility, is an out-patient facility which provides anesthetizing procedures in a medical office building adjacent to a 24-hour hospital. Recent changes in the certification process for CMCS and AAAHC updated to newer edition of the Life Safety Code (NFPA 101) which references the Health Care Facilities Code (NFPA 99), also updated. Each certification body conducts a survey in accordance with the Life Safety Code to ensure the ambulatory care facility meet all provisions to safeguarding patient’s lives.
Services: Physical Environmental Checklist (PEC), Fire Risk Assessment, Inspection, Maintenance and Testing Report
Facility Certification with AAAHC and CMCS
Associated Gastroenterology Medical Group and AGMG Endoscopy Center, an ambulatory care facility, is an out-patient facility which provides anesthetizing procedures in a medical office building adjacent to a 24-hour hospital. Recent changes in the certification process for CMCS and AAAHC updated to newer edition of the Life Safety Code (NFPA 101) which references the Health Care Facilities Code (NFPA 99), also updated. Each certification body conducts a survey in accordance with the Life Safety Code to ensure the ambulatory care facility meet all provisions to safeguarding patient’s lives.
Just Tires, Tustin
Industry: Automotive
Services: High-Piled Storage
This Just Tires location was cited by the Fire department for unpermitted high piled storage (HPS) of rubber tires, a high hazard commodity. Rigsbee Engineering provided Fire Protection and Structural Engineering services to resolve this issue. Design and engineering included a new rack layout plan with proper aisle widths and structural analysis for gravity and seismic loads on the existing foundation and walls of the building. Rack design was in accordance with 2016 CBC, ASCE7-10, and ANSI MH 16.1 Specification for the Design, Testing and Utilization of Industrial Steel Storage Racks. This complete package was accepted by the building department and fire department for construction.
Services: High-Piled Storage
This Just Tires location was cited by the Fire department for unpermitted high piled storage (HPS) of rubber tires, a high hazard commodity. Rigsbee Engineering provided Fire Protection and Structural Engineering services to resolve this issue. Design and engineering included a new rack layout plan with proper aisle widths and structural analysis for gravity and seismic loads on the existing foundation and walls of the building. Rack design was in accordance with 2016 CBC, ASCE7-10, and ANSI MH 16.1 Specification for the Design, Testing and Utilization of Industrial Steel Storage Racks. This complete package was accepted by the building department and fire department for construction.
PetSmart, Santa Ana
Industry: Retail
Services: High-Piled Storage
This pet supply store was sited by the local fire authority for high piled storage (HPS). The retail store had existing permitted and unpermitted HPS. The scope of this project included Fire protection, and Structural engineering. Commodities classified, aisles and flue space detailed for HPS storage.
Services: High-Piled Storage
This pet supply store was sited by the local fire authority for high piled storage (HPS). The retail store had existing permitted and unpermitted HPS. The scope of this project included Fire protection, and Structural engineering. Commodities classified, aisles and flue space detailed for HPS storage.
Muskrat Ave., Adelanto
Industry: Cannabis, Extraction Facility
Services: Code Consulting, Fire Protection Report, Hazardous Materials
Assisted architect and owner on this cannabis extraction facility in the City of Adelanto. Fire protection engineering consulting to achieve plan check approvals with the City of Adelanto and the San Bernardino County Fire Department (SBCoFD). The facility uses CO2 and ethanol extraction techniques.
Services: Code Consulting, Fire Protection Report, Hazardous Materials
Assisted architect and owner on this cannabis extraction facility in the City of Adelanto. Fire protection engineering consulting to achieve plan check approvals with the City of Adelanto and the San Bernardino County Fire Department (SBCoFD). The facility uses CO2 and ethanol extraction techniques.
S Hill Street, Los Angeles
Industry: High-Rise
Services: Structural, Mechanical Equipment
Structural engineering to replace a chiller on historic 13-story downtown building in the jewelry district.
Services: Structural, Mechanical Equipment
Structural engineering to replace a chiller on historic 13-story downtown building in the jewelry district.
Just Tires, Yorba Linda
Industry: Commercial
Services: Structural, Footings for Truck Lift
Just Tires needed a new truck lift. We designed and engineered the foundation for the new lift. Got plans approved with the city and dealt with a Certificate of occupancy issue for the client that was blocking the issuance of the construction permit.
Services: Structural, Footings for Truck Lift
Just Tires needed a new truck lift. We designed and engineered the foundation for the new lift. Got plans approved with the city and dealt with a Certificate of occupancy issue for the client that was blocking the issuance of the construction permit.
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