# What is bridge and its function?

## What is bridge and its function?

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 do you test a toothpick bridge?

Here’s an easy, economical way to find out how strong a toothpick bridge is. Attach the Pitsco Toothpick Bridge Tester to your finished bridge. Gradually fill the tester with weights until your bridge beats the competition or collapses. Weigh the tester to determine the load capacity (or breaking point) of your bridge.

## What is the name of and how much does the most expensive bridge cost?

The five-lane San Francisco–Oakland Bay toll bridge opened in 1963, but was left crippled by the Loma Prieta earthquake in 1989. In 2002, restoration and replacement work began on the bridge at an estimated cost of \$6.3 billion (£3.8 billion).

## How strong is a toothpick?

Based on a wood strength table found on the Internet, compressive strength of tooth pick should be about 5000 psi (pounds per square inch).

Truss bridges

## How do you make a strong bridge?

While connecting two sides, make triangles. If you really have time and want your bridge to be very strong, you may also divide each triangle to 3 smaller triangles. This will give additional strength to your bridge. You may also glue additional strips of pasta over the roadway.

## What type of bridge can be the longest?

Suspension bridges

## How do you make a penny Bridge?

To begin the Penny Bridge, simply gather many one cent pieces, otherwise known as pennys. Make a stack of 10 pennies. Make what we call a triad and place it on top of the stack of ten pennies. Make another triad and place it on top of the other triad.

## What are the three major parts of a bridge?

The main components of a bridge are the foundation, substructure, and the superstructure. Each of these core areas have other parts within them. Piles and pile caps are constructed as the foundation of the bridge.

## Can your bridge hold 100 pennies?

Can you build a bridge that holds 100 pennies, using 1 sheet of paper and up to 5 paper clips? A bridge must support its own weight (the dead load) as well as the weight of anything placed on it, like the pennies (the live load). Your paper bridge must span 20 centimeters (about 8 in.).

## What is the best glue for toothpick bridges?

Any common adhesive/white glue such as Elmer’s may be used at the joints of the wood members. No Gorilla Glue, Tacky glue or Craft/Construction glues may be used.

## How do you make a toothpick bridge step by step?

Place the two bridge pieces parallel to each other one toothpick length from each other. Place toothpicks between the two parts of the bridge. Glue the toothpicks. Let the Bridge dry for 12 hours.

## How do you structure a toothpick?

Toothpick Columns To make a column of toothpicks, take seven toothpicks and coat them with a generous amount of glue. Using your fingers, gently and carefully make sure to coat all the toothpicks while grouping them together. There should be one toothpick in the middle and six toothpicks surrounding the middle one.

## What supports a bridge?

Pile: A pile is a vertical support structure that’s used, in part, to hold up a bridge. It can be made of wood, concrete, or steel. Superstructure: The superstructure is the part of the bridge that absorbs the live load. (The abutment, piers, and other support elements are referred to as the substructure.)

## How much weight can a toothpick bridge hold?

Even though elaborate school-grade toothpick bridges (for example of fully arched design) can weigh over a pound, smaller bridges in the range of 100 grams can carry the load of four or five fully solid bricks!

Pratt truss

## How do you make an arch bridge out of a toothpick?

How to Build an Arch Out of Toothpicks

1. Glue pairs of toothpicks together along the edge to make stronger building components.
2. Glue toothpicks together end-to-end on a flat surface to make a single curved line.
3. Make a second curved line exactly like the first.
4. Stand the two curves up on a foam board so the ends are touching the ground.

## How do you glue toothpicks together?

Toothpicks can be glued together very simply and will be sturdy and secure.

1. Place a large dab of tacky craft glue on the end of a toothpick.
2. Wrap the toothpick joint in thread to keep the toothpicks together.
3. Place a second dab of glue over the wrapped joint and spread to cover the thread with a thin layer of glue.