Awarie Budowlane 2009
Streszczenie referatu

W referacie przedstawiono przyczyny uszkodzenia p�atwi kratowych o rozpi�to�ci 12,0 m pokrytych p�ytami korytkowymi. Stalow� konstrukcj� no�n� dachu 5-cionawowego budynku halowego rozdzielni na terenie elektrowni zrealizowano niezgodnie z projektem technicznym, zmieniaj�c m.in. zarys geometryczny p�atwi oraz jej schemat statyczny. Przyczyn� awarii by�o tak�e pomini�cie w obliczeniach normowego obci��enia �niegiem, wynikaj�cego z mo�liwo�ci gromadzenia si� �work�w �nie�nych� na po�aciach dachowych ni�szych naw bocznych budynku.

The paper presents the reasons of the damage of steel trussed purlins with a span of 12,0 m covered by trough plates. The carrying steel structure of the roof of hall with the 5 aisles of the switching station of the power plant had not been constructed in compliance with the technical design. The geometrical profile of trussed purlins and its static outline had been changed. The breakdown was also caused by the fact that the standard load of snow had not been taken into account in the calculations, neglecting the possibility of the formation of so-called �snow-bags� on the lower surfaces of the roof.