https://www.youtube.com/watch?v=4bWMpB2yf7w
We've all been stuck in traffic waiting for a drawbridge. Have you ever stopped to wonder what it takes to move a bridge? Learn more in this HowStuffWorks vi

https://en.wikipedia.org/wiki/Drawbridge
Drawbridge at the fort of Ponta da Bandeira in Lagos, Portugal A double-beam drawbridge, The Poortbrug in Leeuwarden, Netherlands. A drawbridge or draw-bridge is a type of moveable bridge typically at the entrance to a castle or tower surrounded by a moat.In some forms of English, including American English, the word drawbridge commonly refers to all types of moveable bridges, such as bascule

https://www.madehow.com/Volume-6/Draw-Bridge.html
Draw bridges are made primarily from concrete and steel. Seventy-five hundred short tons (6,804 metric tons) of structural steel and 150,000 short tons (13,6080 metric tons) of concrete were used in the Casco Bay Bridge. A typical draw bridge. in Portland, Maine; it has a 360-foot (10-nm) tall opening and was completed in 1997.

https://www.drawbridgespecific.com/2019/03/30/drawbridge-principles/
Principles Of A Drawbridge. Drawbridges operate as they do based on certain principles. These include the principles of the lever, the pivot and the pulley among others. By using these principles in their designs of drawbridges, engineers are able to successfully move extremely heavy structures with relatively small electric motors.

https://www.historyanswers.co.uk/inventions/how-drawbridges-worked/
Classical, medieval drawbridges worked via the simple principle of counterweight, with large wood and metal bridges pivoted via a series of balancing weights in a castle's gatehouse. The weights, which were attached to the bridge's lifting chains, enabled the platform to be raised via a windlass, which in turn rotated a pair of lifting

https://www.britannica.com/technology/movable-bridge
The drawbridge, or bascule, is the best known; it may be single- or double-leafed.It originated in medieval Europe, probably Normandy, as a defensive feature of castles and towns. It was operated by a counterweight and winch. The drawbridge that formed one span of Old London Bridge was occasionally raised to permit passage of a ship having masts too tall to pass under at this point.

https://medievalbritain.com/type/medieval-life/architecture/parts-of-a-medieval-castle-the-drawbridge/
A castle's Drawbridge typically formed its entrance and lead to the gateway. It spanned over the moat and could be raised to prevent entry into the fortification. Drawbridges were commonly made of wood. The wooden deck had one edge hinged or pivoting at the gatehouse threshold so that it could be raised and flushed against the gate.

https://knightstemplar.co/medieval-engineering-the-art-of-castle-drawbridges/
The drawbridge is an enduring symbol of the medieval era and a testament to the engineering skills and strategic intelligence of the time. Serving as the frontline of castle defense, it showcased the power, authority, and fortitude of the castle's inhabitants. Over the centuries, drawbridge designs have evolved, influencing the art of

https://www.youtube.com/watch?v=ytzNCxTaNxQ
My Patreon: https://www.patreon.com/Kobean_HistoryMy Twitter: https://twitter.com/Kobean_HistoryMy Discord Server: https://discord.com/invite/Twp4JQP (disco

https://chicago.curbed.com/2017/11/17/16666966/chicago-river-bridges-architecture-video
Now, almost two centuries after the first structure was built, things work quite differently. 43 of the original 52 drawbridges still operate, with the help of 108-horsepower motors and enormous

https://www.towerbridge.org.uk/discover/history/how-does-tower-bridge-work
They act like batteries, storing the energy by holding the water under high pressure. Then, when the Bridge was required to open, the water was released into the drive engines, powering yet more pistons to turn a set of cogs. These cogs connect to a rack on the back of the bascules, opening them for passing river vessels.

https://www.drawbridgespecific.com/2019/03/31/types-of-drawbridges/
Types Of Drawbridges. There are many types of drawbridges that are either in use today or have been in the past. These range from floating pontoon bridges, bridges that lower themselves down into the water to allow boats to pass above and even a bridge with a single, narrow, hand removable plank that allows for only the masts of sailboats to

https://study.com/academy/lesson/drawbridges-definition-design-types.html
A drawbridge is defined as a type of bridge that has the capability of moving parts, The sections of a drawbridge lift, slide, or rotate, which allows shipping traffic to easily pass through the

https://www.drawbridgespecific.com/2019/03/30/drawbridge-history/
Drawbridge history goes back to the ancient Egyptians who are believed to have built and used a drawbridge around 4,000 years ago at the fortress of Quban. But it wasn't until the middle ages that drawbridges became relatively common. ... many modern drawbridges operate almost exactly as they would have when Theodore Roosevelt was being sworn

https://www.drawbridgeahead.com/dbfacts.html
I have created a fact sheet on the sequence of operation when a drawbridge has to be opened for you to read. The fact sheet is in Adobe PDF format; you will need the Adobe Reader to view the fact sheet. Here's a video created by Marshall Brain of How Stuff Works that shows how a drawbridge works, which you can find in the videos section of

https://www.youtube.com/watch?v=Ah-l88JAAaE
The Drawbridge is a toy bridge that can be raised to allow passage of a ship having masts too tall to pass under or to defend the entrance of a medieval cast

https://history.stackexchange.com/questions/62148/how-were-drawbridges-and-portcullises-used-tactically
The drawbridge is a routine, minimal, defense (drawn up nightly for example) intended against attack mainly to provide time to lower the inner portcullis. The fortification is the headquarters of the defender's territory, such as a capital city; and/or. It's seen as a status symbol: " Look! a drawbridge!

https://mvmagazine.com/news/2014/05/01/how-it-works-building-drawbridge
It extends above the surface of the water and protects the environment outside of the work area. Once in place, the water is drained from the cofferdam, thereby providing a dry place to build the foundation. As of now, the new bridge is scheduled to be drivable and ready for testing in May of 2015.

https://www.bbc.co.uk/teach/class-clips-video/articles/zft7nrd
LAUREN:'Sege's feature drawbridge works by using a chain and barrel mechanism. 'To make things move, the barrel, 'which is operated by an electric motor at the back of the drawbridge, 'will roll

https://www.youtube.com/watch?v=YgNj4eTfMJ8
This bridge tender was kind enough to let me film him raising the Racine Street Bridge. We saw a sailboat coming. At the beginning of the video the driver

http://drawbridgeahead.com/videos.html
How a drawbridge operates. Here is a video put together by Marshall Brain of How Stuff Works which shows you how a drawbridge operates. Drawbridges of the Pinellas Beaches! Join me on a ten minute trip showcasing the drawbridges of the Pinellas beaches. In this video which I produced, I'll take you across the many drawbridges that connect the

https://forums.funcom.com/t/drawbridges-how-to-open-from-the-outside/200255
Oh man, i was shocked the 1st time i built a decent looking castle with a nice drawbridge, only to figure out i cant open it from outside XD. Had to put the Drawbridge and a Gate behind it. Leaving the bridge either open at all times or closed when im insside and open when i leave the base. Needless to say i was very disapointed

https://www.usatoday.com/story/news/world/2023/06/25/ukraine-russia-war-live-updates/70354622007/
On Sunday, roadblocks and checkpoints around the city had been removed and crowds swarmed the downtown area on a warm, sunny day, packing street cafés with customers, the Associated Press reported.

https://www.youtube.com/watch?v=o08jCFU4nD4
In this video, I will show you how to build a drawbridge that also works as a trap in The Forest. The trap side of it works very well. I go through 5 ways to