Our free of charge calculation service

Need support or planning security for your project? We will be pleased to support you. Our technical team will advise you individually and provide you with the following standard-compliant calculations - based on your data - free of charge:

Emergency Overflow

Snow Guard System

Fastening System

Solar Panel Fastening

You will find all data input sheets here.



Please fill out the relevant form to your project and send it to technik@bst-gmbh.de.

Do you have any questions or need support?

Our technical team will be pleased to help and advise you. Feel free to contact us by phone via +49 (0)8051 69 09 70 or simply send us your request by e-mail to technik@bst-gmbh.de.

Calculation tool for determining the drainage capacity:

Round Emergency Overflow Drains / Parapet Drains

Flow Rate Q [l/s]

Rectangular Emergency Overflow /Parapet Drains

Flow Rate Q [l/s]

Pressure height in round and rectangular emergency overflow / parapet drain:

The water pressure height [mm] is essential for the drainage capacity. The higher the pressure height, the greater the drainage capacity. To determine the pressure height, the maximum allowed water level on the roof must be known.