Sentence:  From the doors of these rooms went men with loaded <WSD>trucks</WSD>, to the platform where freight cars were waiting to be filled; and one went out there and realized with a start that he had come at last to the ground floor of this enormous building. 
Meaning of the word marked with <WSD> tags:  A small wagon or cart, of various designs, pushed or pulled by hand or  pulled by an animal, as with those in hotels for moving luggage, or in libraries for transporting books.