Siphonic rainwater drainage systems are high-performance solutions optimized through advanced engineering studies. The design of these systems is based on international regulations and precise calculation methods, with TS EN 12056-3 being the primary standard utilized in Turkey.

Critical Parameters for Optimum Design

To ensure the stable formation of the siphonic effect and reach the targeted capacity, the following criteria are vital during the calculation phase:

• Use of Meteorological Data: Regional statistical rainfall data from the General Directorate of Meteorology must be used. This ensures the system reaches full performance quickly after installation.
• 100% Fill Rate: Calculating pipe cross-sections based on a full fill rate is necessary for maintaining vacuum power.
• Software Reliability: Calculations performed using professional software with proven accuracy minimize engineering errors.

The Correct Engineering Approach: Emergency Drainage Line

A common mistake is taking rainfall intensity much higher than normal to "stay on the safe side," thereby enlarging pipe sections. However, this can prevent the siphonic effect from being established during average rainfall, leading to dangerous water levels above the outlets.

The correct approach is to ensure building safety by designing an Emergency Drainage Line instead of artificially enlarging sections:

• Secondary Siphonic Line: Building safety is ensured with a second siphonic system, configured either through the parapet or as an independent line, to activate during extreme conditions that exceed the main line's capacity.
• 100-Year Data Analysis: 100-year extreme rainfall data for the region is taken into account when calculating emergency lines.
• Snow Load and Structural Balance: Snow load values used in roof structural calculations determine the maximum allowable water height. For instance, for a snow load of 1.05 kN/m², it is critical to discharge water before it rises above 10 cm to prevent roof collapse.

For detailed information on our precise calculation methods and safe emergency drainage solutions, please contact our technical team.

Review Our Engineering Solutions:
➤ Zet Mekanik Product Catalog