In June 2023, a roof of the amphitheater of the Municipal Theater in Most was successfully completed. The membrane structure has been specially designed to provide protection from the sun and rain above the stage, while making the entire space a visual attraction. The author of the design is Carl Stahl & spol.; the calculation was carried out using the programs RFEM 5 and RWIND 2.
At the end of April 2023, a new aviary was completed at the Sichuan Pavilion in the Prague Zoo. The aviary structure has a length of 14 m and a width of 10 m. The company Carl Stahl & spol. created the architectural and structural design, calculated in RFEM 5.