As strong as you make it... Basically a truss system is used when a beam cannot hold its load, so is one way of 'reinforcing' a beam (you could have more supporting colums or use cable stayed/suspension techniques). Its basically stronger than a beam, and 'weaker' than a suspension bridge, but to be honest it's basically as strong as you engineer it. Try searching truss bridge on wikipedia... there's lots of different types and I'm sure it'l have the info.
Yes. It is very strong.
Yes, but the bridge depends on its age. The older it is, the weaker the bridge is. The younger it is, the STRONGER the bridge is.
we use wood for make bridge strong
Try making a bridge with balsa wood
well inorder to build a strong bridge you need to design it first and then you need to get steal and stuff like that to build it
The supports that are under the bridge is very thick and strong which makes londen bridge strong.
because it poops
with glue
logos
It's arches.
The present London Bridge is a pre-stressed concrete box girder bridge which makes it very strong.
Steel and geometry, tension, straight, aches and channels make a good bridge