3DToolbox Overview 3DToolbox includes many time saving routines for AutoCAD® designers. 3DToolbox is: a subscription service for the design and maintenance of several AutoCAD® tools. a forum where premium members can ask for, and receive custom AutoCAD® tools. add-on software for AutoCAD® custom blocks and details for AutoCAD® a full drop down menu & settings dialog box for several AutoCAD® tools. After successfully installing 3DToolbox, AutoCAD will display the 3DToolbox menu at the end of your drop down menus (An AutoCAD restart may be required). Select any of the options from the menu to start working with that tool. Everything under the Structural section of the menu is dependent on the settings for that group as shown above. The Structural settings are explained in greater detail in the 3DToolbox_Steel section of this manual. AutoCAD will prompt the user with all the questions to complete the tool selected. See each individual tool in this manual for further instruction.