BEAM BRIDGES

THE HISTORY BEHIND IT

• One of the oldest and most common bridges.
• First invented by Joseph Aspdin
• Oldest form consists of a log being placed across a stream.

WHAT IS A BEAM BRIDGE?

• Rigid structure
• 1 beam that is supported at each end
• Held up by pillars

PROS OF A BEAM BRIDGE

• Very strong
• Easy to build
• Inexpensive
• Built since ancient times
• Can be made out of natural materials

CONS OF A BEAM BRIDGE

• The older they are, the weaker.
• Can only span about 650 feet.
• Not as eye-catching as other bridges.

HOW DO BEAM BRIDGES WORK?

BIBLIOGRAPHIES

• "Beam Bridges." Design Technology. N.p., n.d. Web. 10 Jan. 2014.
• Corporation, Conjecture. "What Is a Beam Bridge?" WiseGEEK. N.p., n.d. Web. 10 Jan. 2003.
• "Beam Bridge:Forces." PBS. PBS, 1995. Web. 10 Jan. 2014.
• "Beam Bridges History, Construction, and Future." Brighthub Engineering. Bright Hub Inc., 2012. Web. 10 Jan. 2014.

ANY QUESTIONS?