> For the complete documentation index, see [llms.txt](https://docs.andymark.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.andymark.com/robits-build/intermediate-and-expansion-kits/structure.md).

# Structure

The [AndyMark Robits Intermediate Structure Kit](https://andymark.com/products/robits-intermediate-structures-kit) is a structural expansion kit designed for building larger and more complex robot assemblies. It provides a variety of aluminum tubing, gussets, plates, standoffs, spacers, threaded rods, and fasteners that can be combined to create rigid robot frames and mechanism supports.

The kit is intended to work alongside the Robits Core Kit. While the Core Kit provides the basic components for constructing a robot, the Intermediate Structure Kit adds additional structural parts for more advanced designs.

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#### Design Considerations

When designing with the Intermediate Structure Kit, structural rigidity should be considered from the beginning of the design process.

Long unsupported sections of tubing can flex under load. Adding a second structural member, a cross brace, or a triangular gusset can significantly improve rigidity.

Teams should also consider accessibility. Fasteners should remain reachable after the robot is assembled so that components can be adjusted or replaced during testing.

Moving mechanisms should have sufficient clearance from structural members. Before finalizing an assembly, check the full range of motion of arms, intakes, lifts, and other moving components.

#### Recommended Uses

The Intermediate Structure Kit is particularly useful when a robot requires more structural complexity than can be provided by a basic frame. It is well suited for building towers, mechanism frames, reinforced chassis structures, and mounting systems.

The kit does not by itself provide all of the components needed for a complete robot. This kit can be paired with the Robits Core Kit for motors, drivetrain components, electronics, wheels, gears, belts, chains, sensors, and mechanism-specific items.&#x20;