Put many straws together to make it stronger
Yes
Suspension
Suspension, truss arch & truss causeways
A cantilevered steel through truss bridge.
triangleANS 2 - There is no 'best shape' - each bridge is designed for a particular place and can be almost any kind of construction.
There is no real answer, as anyone could make a new kind of truss rod, for example a licorice truss rod. Perhaps you mean that a truss rod could be under stress or under compression, or be designed for both.
It really depends on what kind of strength you are looking for, a triangle is the strongest shape when rigidity is what is needed (so when you want to have a strong cantilever structure or a general structure that can resist a variety of stresses). It's difficult to say what might be the second strongest shape in such circumstances, but maybe a triangle that is not equilateral, but this is an over simplification. An octet-truss is the strongest structure for cantilevering because of the strength of the triangle However if its 'hardness' you're looking for, or resistance to purely compression, a tessellation of hexagons is your strongest shape, and therefore perhapse an irregular hexagon is your second strongest. A lorimerlite framework is the strongest truss under compression because of the strength of hexagons.
The geometric shape used in truss bridges is the triangle.
Bridges typically have three characteristics and are built into three different types. These include truss bridges, beam bridges, and suspension bridges.
Donghai bridge is a kind of mixed-kind bridge. The first part is the arch bridge. The middle one is the suspension bridge and the last part is the arch bridge.
walnut is the hardest and strongest kind of wood
cantilever bridge it is...