(c) Demonstration of ability to engineer and deliver quality integrated steel structure and glass systems including factory structural glazing of unitized panels as required. Contractor must be able to show successful design, eng ineering, fabrication and supply of integrated glass and steel structure systems for projects for at least five (5) years. Submit with bid alist of at least 5 completed projects for which the Contractor provided glazing systems simil ar in scope and complexity as described by these contract documents. Preference shall be given to the Contractors who have successfully done projects in Thailand.