# Structures and forces acting on them

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Structures and forces acting on them

## 1. A structure is anything that has a basic form

### 1.1. The Empire State Building is a structure because it has a basic form.

1.1.1. Types of Structures

1.1.1.1. Shell

1.1.1.1.1. Shell structures are structures that have very fine layers that cover them.

1.1.1.2. Solid

1.1.1.2.1. Solid structures are structures that have everything held together.

1.1.1.3. Frame

1.1.1.3.1. Frame structures are structures that have a many braces that support the structure.

1.1.1.4. Combination

1.1.1.4.1. Combination structures are structures that are combinations of two different types of structures.

1.1.2. Forces that affect structures

1.1.2.1.1. Loads are things that effect structures, and usually break them down.

1.1.3. Factors that help destroy structures

1.1.3.1. Point of application

1.1.3.1.1. Point of application is where the load touches the structure.

1.1.3.2. Plane of application

1.1.3.2.1. Plane of application is the angle where load touches the structure.

1.1.3.3. Speed

1.1.3.3.1. How fast the object hits the structures.