10 ACCIDENT ANALYSIS IN CONSTRUCTION


glass roof


east side


glass wall


west side


atrium restaurant Figure 1: Schematic view of the atrium showing the walkway layout (not to scale) roof truss


sliding bearing


box beams


hanger rods


fixed bearing


glass wall at rear (west side) Figure 2: Schematic elevation of the atrium showing second- and fourth-floor walkways (not to scale) continuous rod


from roof truss to 2nd floor


concrete on steel deck


rod from 4th floor to roof truss


upper hanger rod pulled out


two steel C- section beams butt-welded to form a box beam


nut and washer rod from


4th floor to 2nd floor


Figure 3: Box beam detail – as designed


steel channels


welded to form transverse box beam


Figure 4: Box beam detail – as built


lower hanger rod


Figure 5: Failed box beam


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