# Quick Answer: What Makes A Bridge Strong?

## What is the strongest type of bridge and why?

Truss bridges are extremely effective because they have a high strength to weight ratio.

In this experiment we have tested which type of truss bridge is the strongest, yet uses the least amount of material.

Two of the most used truss bridges are of the Pratt and Howe design..

## What shape bridge is the strongest?

catenary curveThe overall shape of many bridges is in the shape of a catenary curve. The catenary curve is the strongest shape for an arch which supports only its own shape.

## What is the most important part of a bridge?

Foundation: The foundation (or base) of a bridge is the element that connects the structure to the earth and transfers loads from it to the ground below. Girder: A girder is the main horizontal support beam on a bridge. It supports the smaller beams.

## What chords to use in a bridge?

A simple way to structure a bridge is to switch to another diatonic chord (a chord that occurs naturally in the song’s key) and hold off fully resolving to the I until you return to the verse or chorus. A common choice in a major key is to go to the IV or V chord in the bridge—you also might try the ii, iii, or vi.

## What does a bridge need to be strong?

The prototypical bridge is quite simple—two supports holding up a beam—yet the engineering problems that must be overcome even in this simple form are inherent in every bridge: the supports must be strong enough to hold the structure up, and the span between supports must be strong enough to carry the loads. …

## What keeps bridges from falling down?

They do it by carefully balancing two main kinds of forces called compression (a pushing or squeezing force, acting inward) and tension (a pulling or stretching force, acting outward), channeling the load (the total weight of the bridge and the things it carries) onto abutments (the supports at either side) and piers ( …

## How do you structure a bridge?

For designing safe bridge structures, the engineering design process includes the following steps: 1) developing a complete understanding of the problem, 2) determining potential bridge loads, 3) combining these loads to determine the highest potential load, and 4) computing mathematical relationships to determine the …

## What type of bridge is the weakest?

beam bridgeIn their basic form, beams are the simplest bridge design with anything from a stretch of elevated highway to planks of wood over a small ditch forming a beam bridge. The weight placed on a beam bridge is pressed directly downward, toward any underneath support, which makes the middle portion of the bridge the weakest.

## What is the strongest shape?

TrianglesTriangles: The Strongest Shape. One shape is a favorite among architects, the triangle. The triangle is the strongest shape, capable of holding its shape, having a strong base, and providing immense support.

## What is the main purpose of having a bridge?

A bridge is a structure built to span a physical obstacle, such as a body of water, valley, or road, without closing the way underneath. It is constructed for the purpose of providing passage over the obstacle, usually something that is otherwise difficult or impossible to cross.

## How can bridge collapse be prevented?

Allow water or large debris to pass through bridges, creating better resistance during floods. Use clear span bridges that go over a channel without exposed supports. Make sure design standards outlined by the American Society of Civil Engineers are surpassed.

## What is the most common truss bridge?

Pratt truss bridgeOriginally designed in 1844 by railway engineers Thomas and Caleb Pratt, the Pratt truss bridge is one of the most common bridge designs.

## What makes a bridge weak?

Structural trauma caused by earthquakes, floods and fire may not result in total collapse but can seriously damage or weaken a bridge. Other problems may be less obviously destructive and come with the element of surprise discovery. Corrosion is a major threat to bridges.

## Which type of bridge can hold the most weight?

arch bridgeThe arch bridge can hold the most weight of the three, the deck truss bridge can hold an average amount of weight, and the beam bridge could hold the least amount of weight. This experiment tested the arch, deck truss, and beam bridges to see which could hold the heaviest amount of weight.

## How do you make a good bridge?

25 Bridge Building TipsHumidity affects the weight of your bridge. … Go easy with the glue bottle. … Keep your hands clean! … Perfect practice makes perfect. … Keep your bridge from twisting by using lateral bracing.An L-beam is more efficient than a square, but harder to build.Balsa wood comes in a wide range of densities and stiffness.More items…•

## What is the easiest bridge to build?

Beam bridgesBeam bridges typically span up to 250 feet, and they’re also the cheapest and easiest bridges to build.