Beams, arches, and cantilevers are important shapes used in buildings and other structures. Let’s explore what they are and where you see them in the real world!

Beams

• Support in Buildings: Beams help hold things up. They carry weight and make sure everything stays stable. For example, a simple beam can support loads that are up to 20 times its own weight!
• Bridges: Beams are also found in bridges. Some can stretch over 300 meters! A famous one is the Firth of Forth Bridge in Scotland. It’s really long—about 2,528 meters!

Arches

• Architectural Structures: Arches are great for spreading out weight. The Roman Colosseum, built way back in AD 80, is a good example. It has many arches that help it hold up to 50,000 people!
• Bridges and Aqueducts: Arches are also used in bridges and aqueducts (which carry water). The Pont du Gard in France is a stunning example. It stands 49 meters high and was made to transport water over far distances.

Cantilevers

• Overhanging Structures: Cantilevers are used in places like balconies and diving boards. A cool example is Fallingwater, designed by Frank Lloyd Wright. It sticks out 13 feet over a waterfall!
• Bridges: The Humber Bridge in the UK has cantilever sections too. Its main span reaches 1,410 meters, making it one of the longest bridges in the world.

These structures—beams, arches, and cantilevers—are not just interesting; they help create buildings and bridges that we use every day!