load-bearing steel structure. long-term use. chemical aggressive environment. corrosion. cracks. static calculation. strengthening. nosná oceľová konštrukcia. dlhodobé použitie. chemické agresívne prostredie. korózia. trhliny. statický výpočet. zosilnenieGramblička, Štefan, 1948- Repairs of Steel Structures after Long-Term Use in Aggressive Environment. -- 10.4028/www.scientific.net/KEM.714.213. Živner, Tomáš, 1981- In: Key Engineering Materials. -- ISSN 1013-9826 Conference on the Rehabilitation and Reconstruction of Buildings. -- Vol. 714, (2016), s. 213-220.