This door is suspended from an overhead track, may use steel or nylon rollers, and has floor guides to prevent the door from swinging laterally.

This door is suspended from an overhead track, may use steel or nylon rollers, and has floor guides to prevent the door from swinging laterally.

• A. Swinging
• B. Sliding
• C. Folding
• D. Vertical

Answer: (B)

Sliding doors are mounted to an overhead track and move horizontally, using rollers and floor guides to keep them from swinging out of alignment. The overhead track and rollers let the door travel along a flat path, while the floor guides prevent lateral movement so the door stays aligned as it slides. This setup is distinct from swinging doors, which hinge and swing open, from folding doors, which are made of multiple panels that fold, and from vertical rolling doors, which roll up vertically instead of sliding along a horizontal track.

Sliding doors are mounted to an overhead track and move horizontally, using rollers and floor guides to keep them from swinging out of alignment. The overhead track and rollers let the door travel along a flat path, while the floor guides prevent lateral movement so the door stays aligned as it slides. This setup is distinct from swinging doors, which hinge and swing open, from folding doors, which are made of multiple panels that fold, and from vertical rolling doors, which roll up vertically instead of sliding along a horizontal track.