His design was strong , fireproof , inexpensive to construct , and opened up by eliminating heavy obstructive columns .
Kahn was one of Detroit 's foremost industrial architects , known for his large concrete - reinforced automobile factories .
Kahn 's design was strong , fireproof , inexpensive to construct , and opened up by eliminating heavy obstructive columns .
Kahn was one of Detroit 's foremost industrial architects , known for his large concrete - reinforced automobile factories .