Building Envelope Terminologies

Have you ever wondered how a "chicken head" is used in curtain wall?  How about the difference between Mineral Fiber and Mineral Wool?  A Dead Load Anchor and a Wind Load Anchor?  From AAMA to Window Wall this glossary of building envelope terms, provided by Wheaton & Sprague Engineering, defines many of the industry specific terms and phrases.   The glossary is found here: http://www.wheatonsprague.com/building-envelope-industry-terms.htm