Grid System
You can use the Grid System tool to lay out a grid system for large structures. The grid system is useful when creating welded structures. The grid system is also helpful when you work with multiple users who use different third-party applications because they can make grids from the same baseline.
Grids can help specify the location of key elements in structures. To use the Grid System tool, you create a sketch to represent the grid. You can then specify the number of levels (floors) for the structure and the distance between each level. The sketch is replicated for every level in the structure. Balloons are attached to the grid items to help with orientation. A 3D sketch acts as a support between each level in the structure.