House construction used to always feature beams of great solid wood that carried the weight of the upper floor, or ceiling, transferring the stress to the walls. Nowadays, little has changed and wooden A-frames are still widely used to support a roof line. However in modern homes, beams and trusses are rarely on show.
Architects tend to hide away the structural elements of a home so far as possible. So, although beams and supports are still used, they are mostly invisible.