Manic Monday--But How Do They Get The Helicopters Out?

I know you've all wondered what was inside of those mysterious skyscraper headquarters of those nefarious 1960s criminal organizations. Well, thanks to Brave And The Bold #64 (1966), we got the answer for you (click to embiggen):

If you'll note, the building is "on stilts"--there is no first floor. So how, exactly, do they get those howitzers and helicopters and vehicles out of the upper floors without being seen?

I am glad they have an entire floor dedicated to "Crime Class." Because a criminal mind is a terrible thing to waste...