See also: Progressive pop and Art rock. The term progressive rock is synonymous with art rock, classical rock, and symphonic rock. Historically, art rock has been used to describe at least two related, but distinct, types of rock music.
The usual range of sizes for internal doors is: 6'6 x 2'3 (1981mm x 686mm), 6'6 x 2'6 (1981mm x 762mm), and 6'6 x 2'9 (1981mm x 838mm). Kitchen Cupboard Door Sizes. The standard widths for kitchen cupboard doors are 300mm, 400mm, 500mm, 600mm, 800mm, and 1000mm. Wall unit doors are usually 600mm or 720mm high.
For exterior doors, the minimum opening is 0.90 m when the door is open. For interior doors, the minimum opening is 0.80 m when the door is open. The minimum door opening can be 0.75 m if the access is straight or if the door can stay open by itself (fig. 5).