Support loads refer to the forces or loads that are applied to a structure to ensure its stability and resistance to external forces. These loads are crucial in preventing the structure from collapsing or deforming under the applied loads. In engineering, various structural elements are used to provide support and distribute these loads effectively. Some of the commonly used structural elements for support loads are frames, machines, trusses, and beams.

Frames:
- Frames are structural elements that consist of interconnected bars or beams arranged in a rigid framework. They are used to support loads by transferring the applied forces to the foundations or other supporting structures.
- Frames can be made of various materials such as steel, concrete, or timber, depending on the application and the required strength.
- Frames are commonly used in buildings, bridges, and other structures where the loads need to be distributed and transferred efficiently.

Machines:
- Machines, such as cranes, hoists, and lifts, are often used to support heavy loads and move them from one place to another.
- These machines are designed with strong structural components, such as beams and frames, to provide the necessary support and stability.
- The structural elements in machines are specifically designed to withstand the dynamic forces and vibrations generated during the operation.

Trusses:
- Trusses are structural elements composed of interconnected triangular units. They are commonly used to support loads in roofs, bridges, and other structures.
- The triangular units in trusses distribute the applied loads evenly along the members, making them highly efficient in supporting large loads.
- Trusses are lightweight and can span long distances, making them an ideal choice for structures where weight and span are critical factors.

Beams:
- Beams are horizontal or vertical structural elements that are used to support loads by transferring them to the supports or foundations.
- Beams are often made of materials such as steel, concrete, or timber, depending on the required strength and the specific application.
- Beams can be simple or composite, depending on the complexity of the load distribution and the structural requirements.

In conclusion, frames, machines, trusses, and beams are all used as support loads in various engineering applications. Each of these structural elements serves a specific purpose in providing stability, distributing loads, and ensuring the overall structural integrity of the system.