How to easily Vbranches for HVAC duct systems in AutoCAD using an AutoCAD Lisp

How to draw 45 Takeoff branches for HVAC duct systems in AutoCAD?

If you are working with HVAC duct systems in AutoCAD, you may want to create a takeoff to connect the main duct to the branch ducts with a smooth transition. However, creating takeoff manually can be complicated and time-consuming, especially if you have to draw, trim, and fillet many lines and arcs. 

Introduction to AutoCAD.

Fortunately, a simple LISP code can be used to quickly and simply build takeoff for HVAC duct systems in AutoCAD. I'll walk you through using a LISP code in this article that allows you to click once to build takeoff for any duct system in your picture.

What is the AutoCAD LISP and how do you upload it to AutoCAD?

After you have uploaded the LISP file, you need to type 'BD' to activate it.

First, select the side of the sub-duct, which is closest to the main flow.

then, select the other side of the sub-duct, which is far from the main flow.

finally, select the side of the main duct, which will be connected to the sub-duct.

Download the mm lisp from here.

Download the cm lisp from here.

Download the m lisp from here.

Conclusion:

When handling HVAC duct systems in AutoCAD, you can save a ton of time and effort by utilizing this LISP code. With just one click, you can quickly and simply generate takeoff for any duct system without having to draw, trim, and fillet a lot of lines and arcs. This LISP code may also be used to make takeoffs that are smooth and consistent, particularly if you wish to adhere to a certain standard or preference.

In this post, I've explained how to use a LISP code in AutoCAD to quickly and simply generate takeoff for HVAC duct systems. This is a highly practical and helpful tool that will help you work with HVAC duct systems in AutoCAD more efficiently and produce better work. I hope this essay is useful and instructive to you. Please leave a remark below if you have any queries or comments. I appreciate you taking the time to read.