Here are a few slides that have some construction details.
https://www.flickr.com/photos/advance-design_parts_co/albums/72157632203721308
These will be similar methods of construction.
https://www.flickr.com/photos/advance-design_parts_co/albums/72157632397678708
I think there is enough detail provided in the strips to establish construction was steel frames with wood decks.
https://www.flickr.com/photos/advance-design_parts_co/albums/72157632262719304
https://www.flickr.com/photos/advance-design_parts_co/albums/72157632906249201