Which phrase describes 'panel, slab, and ledge' as a group?

Which phrase describes 'panel, slab, and ledge' as a group?

• A. Wood swinging doors.
• B. Metal swinging doors.
• C. Overhead rolling doors.
• D. Revolving

Answer: (A)

Panel, slab, and ledge describe how a wooden door is built. They refer to common wood door styles that swing on hinges: a panel door has framed sections with panels; a slab door is a flat, single-piece door without a built-up frame or panels; a ledge door uses horizontal ledges or braces for rigidity. Because these terms pertain to the construction of wooden doors that swing, they group under wood swinging doors. Other door types—metal swinging doors, overhead rolling doors, or revolving doors—are built differently and aren’t described by these terms.

Panel, slab, and ledge describe how a wooden door is built. They refer to common wood door styles that swing on hinges: a panel door has framed sections with panels; a slab door is a flat, single-piece door without a built-up frame or panels; a ledge door uses horizontal ledges or braces for rigidity. Because these terms pertain to the construction of wooden doors that swing, they group under wood swinging doors. Other door types—metal swinging doors, overhead rolling doors, or revolving doors—are built differently and aren’t described by these terms.