This week we made suspension bridges in groups using chairs, ropes, string and a wooden plank.  We got  two chairs and put them apart from each other.  They were meant to be the towers of the bridge.  Then we got ropes and tied them onto the chairs, these were meant to be the cables.  We had to pull them tight and hold them.  In a real bridge they would be anchored to the ground.  We tied string onto the ropes and tried to get the string all at the same level.  We balanced the wooden plank onto the string and we sat a car on there to see if it would balance.  We had to adjust the strings to get our car to stay on the wooden plank.  In a real bridge the roadway would sway back and forth in a high wind because it is not fixed to the ground it is being held up by the cables.

There is a suspension bridge near Clackmannan called the Forth Road Bridge.  You have to go over it on the way to Edinburgh.

Here are our photos.