Engro Chemicals Ltd.
Urea2 Area Steel Stack extension Daharki, Pakistan
A 265ft high self supported steel tower to support a 280ft high stack pipe. 50 years old existing tower already supporting a 270ft high stack pipe was assigned to reanalyze for additional eccentrically positioned stack pipe. Old structural drawings were consulted to get better understanding of existing design approach. Scope of work includes the reanalysis of the tower with the new conditions and to keep the tower deflection and member stresses within permissible limits by strengthening at required locations. Three-dimensional modal was constructed and CAD aid was taken to precisely locate the coordinates of the structural geometry. More than 1000 elements contributed in defining the geometry and SAP post processor SAPSTL was used for steel stress check. Proper pedestal and anchor bolts were provided for vertical support. The assignment as a whole was really challenging and learning. |
updated: June 2002