Statics › Section B · Forces and other vectors › Topic B.3
3D vectors and direction angles
Guy wires, crane jibs and roof bracing rarely lie in a single plane. To handle them you need a third axis, a standard way to orient it, and ways to describe a direction in space when one angle is no longer enough.
In this topic
- Into the third dimension
- Right-handed axes
- Rectangular components in 3D
- Direction cosine angles
- Worked example: a force on an anchor bolt
- Worked example: finding the third angle
- Spherical coordinates
- Worked example: a guy-wire force
- Cylindrical coordinates
- Common mistakes to avoid
- Key takeaways
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