Types of Bridges (Construction/ Engineering) - Free Printable

Let's analyze each bridge in the image and complete the table with the correct information: Type of Bridge, Description, and Which parts are under TENSION or COMPRESSION.

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🔹 Bridge 1 (Top Row)

Image: A simple horizontal beam supported at both ends by vertical supports. The deck is flat, and it appears to be resting on piers.

#### ✔ Type of Bridge:
Beam Bridge

#### ✔ Description:
A beam bridge is the simplest type of bridge, consisting of a horizontal beam supported at each end by piers or abutments. It spans a gap and carries loads directly down to the supports.

#### ✔ Forces:
- Deck (beam): Under compression on the top and tension on the bottom when loaded.
- Supports (piers): Experience compression from the weight of the beam and traffic.

> 🟩 Tension: Bottom of the beam
> 🟥 Compression: Top of the beam, piers

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🔹 Bridge 2 (Second Row)

Image: A suspension bridge with two tall towers and cables draped over them, supporting the roadway.

#### ✔ Type of Bridge:
Suspension Bridge

#### ✔ Description:
A suspension bridge uses long cables anchored at each end and suspended over towers. The roadway hangs from these cables via vertical suspender cables. It can span very long distances.

#### ✔ Forces:
- Main cables: Under tension — they carry the load from the deck and pull outward toward the anchorages.
- Towers: Under compression — they support the weight of the cables and deck.
- Deck: Experiences both tension and compression depending on location, but primarily supported by tension in the cables.
- Anchorages: Resist the tension forces from the cables.

> 🟩 Tension: Main cables, suspender cables
> 🟥 Compression: Towers

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🔹 Bridge 3 (Third Row)

Image: A truss bridge with a triangular framework above the deck.

#### ✔ Type of Bridge:
Truss Bridge

#### ✔ Description:
A truss bridge uses a framework of triangles to distribute loads efficiently. The triangular design provides strength and stability, making it suitable for medium spans.

#### ✔ Forces:
- Diagonal members: Some are in tension, others in compression, depending on their orientation and load.
- Horizontal top chord: Usually in compression
- Bottom chord: Usually in tension
- Vertical members: Often in compression, but may vary.

> 🟩 Tension: Bottom chord, diagonal members (slanted upward)
> 🟥 Compression: Top chord, vertical members

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🔹 Bridge 4 (Bottom Row)

Image: An arch-shaped bridge with the deck on top of the arch.

#### ✔ Type of Bridge:
Arch Bridge

#### ✔ Description:
An arch bridge uses an curved arch to transfer the weight of the bridge and its loads into thrust forces along the curve, pushing outward to the abutments.

#### ✔ Forces:
- Arch: Under compression throughout its structure.
- Abutments: Resist the outward thrust forces from the arch.
- Deck: May experience tension or compression, but primarily supported by the arch.

> 🟥 Compression: Entire arch
> 🟩 Tension: None in the main arch (but possible in deck if not rigid)

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✔ Final Completed Table:

| Name the type of Bridge | Write the correct DESCRIPTION | Which parts are under TENSION or COMPRESSION? |
|-----------------------------|-----------------------------------|--------------------------------------------------|
| Beam Bridge | A simple horizontal beam supported at both ends by piers. | Tension: Bottom of beam<br>Compression: Top of beam, piers |
| Suspension Bridge | Uses cables suspended over towers to support the deck; can span long distances. | Tension: Main cables, suspender cables<br>Compression: Towers |
| Truss Bridge | Features a triangular framework that distributes loads efficiently. | Tension: Bottom chord, some diagonals<br>Compression: Top chord, verticals |
| Arch Bridge | Uses a curved arch to transfer loads to abutments via compression. | Compression: Entire arch<br>Tension: None in arch (possible in deck) |

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