A good place to begin is the Interior Design Research Guide on the Library home page. This guide is a gateway to the resources that provide information on interior design. Often books provide high resolution plans and elevations, so you may want to start your search in the Library catalog. Search the Library catalog using the keywords "plans" and "restaurants" together to get a list of books. You can limit to Wentworth only if you wish, since other schools in our consortium, such as the Mass College of Art, may also have useful books.
Also, listed on the Interior Design Research Guide is a tab called Drawings & Plans. Use Avery Index to search for articles from architecture periodicals. Once in the Avery database, you can go to the "Advanced Search" feature and limit by choosing "plans" and/or "sections" under "Physical Description" to find only articles with plans and/or sections. Some of these may be in paper format only, and you will have to request Library staff to retrieve the journal for you. Be sure to get all of the information about the article -citation information - to allow us to locate it easily. Citation information includes the following: title of the periodical, title of the article, the author's name, the year and month it was published, and any volume and number information.
If you still are not finding what you need, be sure to ask a librarian to assist you.