Designing fire protection systems is a combination of standards, real risks and operational logic. Even one mistake at the start can be costly: from rework and downtime to ineffective extinguishing at a critical moment. Below are seven situations that most often “break” projects. The material will be useful to developers, technical directors and operational services of warehouses, factories, shopping malls and office centers. The team of the company “Kyivpozhbezpeka” regularly encounters such cases during audits and commissioning.
1. There is no complete risk assessment of the facility
The most common reason for failures is copying solutions from another building. Without calculating the combustible load, storage height, features of technological processes and fire spread scenarios, the system turns out to be either excessive or weak. These are exactly the typical fire extinguishing design errors that are discovered too late. To avoid this, it is worth starting with a pre-design survey and categorization of premises according to fire hazard.
2. Wrong choice of extinguishing agent and type of installation
Water is not universal: inert gases are needed in server and archive rooms, foam is needed for LZR, powder or aerosol is needed for local areas. An unsuccessful choice leads either to insufficient extinguishing or to damage to property. To avoid this, solutions are selected according to the function of the premises, taking into account the safety of people, the sensitivity of equipment and the requirements for ventilation after start-up.
3. Hydraulic errors and pressure losses
Incorrect diameters, underestimated losses, “weak” pumps and sprinklers on remote branches do not provide the design intensity. These are classic fire system design errors that result in NDP. To avoid this, hydraulic calculations are performed with the current coefficients, the “worst” branch is checked and a reasonable reserve is laid.
4. Non-compliance with DBN during design
Indentations are violated, fire protection cut-offs are missing, sprinklers under beams are not recalculated, cable lines are not compatible, and the expert review turns the project around, and the construction site stops. Non-compliance with DBN during design most often occurs due to outdated templates or haste. To avoid this, work according to the current DBN/DSTU, record all deviations with justification and c
5. Isolation from architecture and related engineering systems
Firefighting does not work in a vacuum. Without integration with ventilation, smoke extraction, alarm and ACS, evacuation becomes chaotic, and smoke can “migrate” to neighboring areas. To avoid this, a matrix of interactions (who gives the command to whom) is prescribed at the concept level and tested during FAT/SAT together with the adjacent ones.
6. Ignoring service and operation
Valves covered with panels, inaccessible collectors, missing platforms for cylinders - this makes maintenance expensive and risky, and downtime increases. This is how typical fire extinguishing design errors are born, which hit the budget hard during operation. To avoid this, access zones, cut-off nodes, drainage and test points are provided, and maintenance regulations are added to the design documentation.
7. Формальний пусконалагоджувальний етап
Even an ideal project is not worth much without real tests: pressure and flow checks, notification tests, fire/evacuation scenarios, personnel training. The formal approach leaves “blind spots” until the first emergency. To avoid this, a detailed NDP program is prepared with a list of measurements and acts and integration tests are carried out together with operation.
How to reduce the risk of errors at the start?
Below is a short checklist for the customer and the general designer. It does not replace the standards, but it helps to keep key decisions under control. If you follow it from the first meetings, the chances of “running into” expensive alterations become much smaller:
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Conduct an audit of the initial data: planning decisions, technology, and room categories.
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Coordinate the fire safety concept with all related sections even before the working documentation.
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Maintain a register of decisions and deviations from the DBN with calculation bases and change history.
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Set a budget and schedule for testing, training, and follow-up service.
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Attract a contractor with a specialized portfolio and transparent calculation methodology - the experience of Kyiv Fire Safety will help here.
A properly organized “design for operation” process reduces risks, speeds up approvals, and makes the system predictable in a real alarm. This is how teams work, focusing not only on paper compliance, but on results in the field - without unnecessary downtime and with guaranteed extinguishing efficiency.