This guide will take you through various components of Grasshopper that will allow you to create, query, modify or delete structural elements.
Add Beam System
Use the Beam System+ v1.14 component to Add Beam System in the project.
Add Wall Foundation
Use the Wall Foundation+ v1.14 component to Add Wall Foundation in the project.
Use the Add Truss+ v1.14 component to Add Truss in the project.
Working with Analytical Models
Review this introductory video where you can see how to get started working with analytical models in Revit.