An engineering company is designing a truss bridge. How should they arrange the steel bars that make up the trusses?(1 point)
Responses
in a semi-circular shape
in a semi-circular shape
in a triangular shape
in a triangular shape
in a box shape
in a box shape
in an upside-down V shape
in a triangular shape
A city wants to build a beam bridge that will span 500 feet (152 meters). What is the best way to build the bridge?(1 point)
Responses
Link two or more beams end-to-end so the bridge does not sag in the middle.
Link two or more beams end-to-end so the bridge does not sag in the middle.
Arrange the beams in a triangular shape to distribute the load over a larger distance.
Arrange the beams in a triangular shape to distribute the load over a larger distance.
Put an arch into the beams to carry the weight of the beams and the heavy load.
Put an arch into the beams to carry the weight of the beams and the heavy load.
Drape steel cables over the supports of the beam bridge to hold up the roadway.
Drape steel cables over the supports of the beam bridge to hold up the roadway.
Link two or more beams end-to-end so the bridge does not sag in the middle.
How are drones used to help natural disaster relief efforts?(1 point)
Responses
to repair roads
to repair roads
to gather information
to gather information
to help people communicate
to help people communicate
to carry food and water
to gather information
When designing a truss bridge, engineers typically arrange the steel bars that make up the trusses in a triangular shape. This is because the triangular arrangement provides stability and strength to the bridge structure. To understand why this arrangement is preferred, let me explain a bit about truss bridges.
A truss is a framework of bars or beams that are connected together to support loads. The bars in a truss bridge are arranged in such a way that they form triangular shapes. This arrangement helps distribute the load evenly across the truss and transfers it to the supporting piers or abutments.
Triangles are structurally stable shapes because they distribute forces across their members more efficiently. The triangular arrangement allows the bars to work together in tension and compression to resist bending and twisting forces. It helps make the bridge more rigid and capable of handling heavy loads.
Now, to answer your question, the engineering company should arrange the steel bars in a triangular shape when designing the truss bridge. This can be achieved by connecting the bars together at their ends to form triangles throughout the truss structure.
I hope this explanation helps you understand why the triangular arrangement is preferred for truss bridges. If you have any further questions, feel free to ask!