This document provides information about different types of doors and windows. It defines threshold as the bottom of a doorway, and lists different materials used for thresholds like wood and marble. It also describes surface sliding doors, folding or bi-fold doors, louvered doors, and metal door frames. Additionally, it defines muntins and mullions as divisions in windows, and transom windows as windows above doors. Finally, it provides details about Palladian windows, noting they have a larger central arched section between two smaller side sections and were popular in Renaissance and classical architecture.

4. Closer

11. Panic Bar

14. Threshold: a strip of
wood, metal, or stone
forming the bottom of a
doorway and crossed in
entering a house or room.

15. Wood Threshold

16. Marble
Threshold

17. Marble
Threshold

27. Surface sliding door

28. Folding doors,
also referred
to as
Bi-fold doors

31. Louvered door

33. Metal door frame

59. Muntins
Mullions

62. Transom
window

64. Transom
window

65. Transom
window

66. Transom
window

67. Palladian window

68. • A Palladian window is a large window that is
divided into three parts. The center section is
larger than the two side sections and is usually
arched. Renaissance architecture and other
buildings in classical styles often have Palladian
windows. On Adam or Federal style houses,
there is often a Palladian window in the center of
the second story.

69. • The term "Palladian" comes from
Andrea Palladio, a Renaissance architect
whose work inspired some of the greatest
buildings in Europe and the United States.
Modeled after classical Greek and Roman
forms, such as the
arched windows of the Baths of Diocletian,
Palladio's buildings often featured arched
openings.