All designs and detail plans of steel work were checked .
All designs and detail plans of steel work were approved by Modjeski & Angier , consulting engineers , Chicago ; Hildreth & Co. , Chicago , performed the inspection of steel at mill and shop .
All designs and detail plans of steel work were checked and approved by Modjeski & Angier , consulting engineers , Chicago ; Hildreth & Co. , Chicago , performed the inspection of steel at mill and shop .