Support Conditions |
| Type | Description | Image | Free-Body Diagram |
| Fixed Support | a fixed support resists translation and rotation of a member at the connection point. The reactions of a fixed support compose three unknown forces, including both a vertical and a horizontal component and a resisting moment. |
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| Rocker Support | a rocker support resists translation of a structural member in the perpendicular direction to the contact surface. This reaction of a rocker connection represents one unknown force component. |
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| Pin/Hinge Support | pinned/hinged support – A pin or a hinge support resists translation of a structural member in both horizontal and vertical directions. The reactions of a pin support represent two unknown force components |
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| Roller Support | a roller support resists translation of a structural member in the perpendicular direction to the contact surface. This reaction of a roller connection represents one unknown force component. |
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