air case ▁leading ▁to ▁the ▁bas ement ▁level . ▁This ▁level ▁contains ▁class rooms ▁and ▁lock ers ▁ ▁for ▁the ▁Wayne ▁State ▁School ▁of ▁Business ▁Administration . ▁The ▁building ▁contains ▁a ▁total ▁of ▁ ▁of ▁class room ▁space , ▁some ▁of ▁it ▁under ne ath ▁the ▁surrounding ▁m all . ▁A ▁bas ement - level ▁tunnel ▁connect s ▁the ▁building ▁to ▁the ▁Helen ▁L . ▁De Ro y ▁Aud itor ium . ▁ ▁Helen ▁L . ▁De Ro y ▁Aud itor ium ▁ ▁The ▁De Ro y ▁Aud itor ium ▁is ▁a ▁nearly ▁square ▁two - story ▁window less ▁steel - frame ▁building ▁with ▁a ▁flat ▁roof ▁with ▁broad ly ▁project ing ▁e aves . ▁The ▁fa ç ades ▁are ▁cl ad ▁in ▁narrow ▁gray - color ed ▁cast ▁concrete ▁pan els ▁with ▁white ▁mar ble ▁ch ips . ▁On ▁all ▁four ▁sides , ▁raised ▁rib s ▁are ▁over la id ▁on ▁the ▁pan els , ▁termin ating ▁in ▁Goth ic ▁arch es ▁just ▁beneath ▁the ▁e aves . ▁The ▁rib s ▁project ▁about ▁four ▁inches ▁at ▁ground ▁level , ▁but ▁gradually ▁increase ▁in ▁depth ▁toward ▁the ▁top ▁of ▁the ▁building ▁until ▁they ▁project ▁almost ▁two ▁feet ▁near ▁the ▁top . ▁The ▁broad ▁e aves ▁and ▁cur ving , ▁project ing ▁rib s ▁create ▁striking ▁sh adows . ▁The ▁g oth ic ▁arch ▁treatment ▁on ▁the ▁De Ro y ▁Aud itor ium ▁is ▁strongly ▁similar ▁to ▁Yam as aki ' s ▁design ▁of ▁the ▁United ▁States ▁Science ▁Pav il ion ▁at ▁the ▁