3skeng products are designed for Trimble SketchUp and require a running SketchUp on your Windows or Mac computer.

• Current "3skeng 2025" for Mac and Windows PCs is available on the download page (running with SketchUp 2025, 2024 and 2023).
• Previous "3skeng 2024" for Mac and Windows PCs is available on the download page (running with SketchUp 2024, 2023, 2022, 2021 and 2020).
• Previous "3skeng 2023" for Mac and Windows PCs is available on the download page (running with SketchUp 2023, 2022, 2021 and 2020).

Certainly we support 3skeng for Windows. You can use the following desktop versions of Windows:

• Windows 10
• Windows 11

Yes, we support 3skeng for OS X. You can use the following versions of OS X:

• 10.11 (El Capitan)
• 10.12 (Sierra)
• 10.13 (High Sierra)
• 10.14 (Mojave) - 3skeng 2018 and higher
• 10.15 (Catalina) - 3skeng 2019 and higher
• 11.6 (Big Sur) - 3skeng 2021 and higher
• 12.1 (Monterey) - 3skeng 2022 and higher
• 13 (Ventura) - 3skeng 2023 and higher (also ARM M1)
• 14 (Sonoma) - 3skeng 2024 and higher (also ARM M1)

We have tested the setup software and the 3skeng software very carefully. Nevertheless it is a complex software and we may have not tested all possible configurations. Please send us an email to support@3skeng.com with a description of the problem as detailed as possible. Clarifying screen shots are highly appreciated. We will help you as soon as possible!

Please consult guide 3skeng - Starting Guide.pdf

Please consult guide 3skeng - Starting Guide.pdf

Please consult guide 3skeng - Starting Guide.pdf

We know that some computers has problems with the synchronization process of 3skeng. Normally the synchronization process finished its job within a maximum of 15 minutes.
There are some typical reasons for not synchronizing. And there are also some tips for you:

• Ensure that you have installed our latest version of 3skeng.
• If you have doubts about the version, uninstall 3skeng, reboot, do not start any other software, install the newest 3skeng version, reboot.
• For some firewalls it is necessary to open the internet access for "SketchUp.exe".
• Enable session cookies for the Internet Explorer (PC) or Safari (Mac).
• Allow Cookies at least for our server address http://web02c.3skeng.net
• Allow execution for JavaScript
• Open the Internet Explorer, click: Tools -> Internet Options -> Advanced, check to be sure al least the TLS 1.2 protocol is enabled under the security section.
• In some company networks, the internet access works only over a Proxy Server. This version of 3skeng synchronization may not work over a Proxy! Ask your Network-Administrator to help you getting a direct and unrestricted access to the internet. At least replace any proxy script by the IP-Address or name of the Proxy-Server.
• If that does not work, synchronize your computer in another network, e.g. at your IT-Helpdesk or in your home network.

Please note, only change your firewall settings if you know what you do. You may need to consult your network administrator.

• Open the following firewall for the remote ports 80 (HTTP) and 443 (HTTPS).
• 3skeng client needs unrestricted access to the servers www.shk.com, www.3skeng.net and web02c.3skeng.net
• Some Firewalls (e.g. Avira) may operate as Web-Proxy to check your Web communication. This may results in changes of outgoing and incoming ports for TCP-Communication.

This indicates that the registration process failed.
Please ensure you have entered the correct activation code, you received from noreply@3skeng.com.
Please allow Session Cookies and JavaScript. Check also that no firewall, proxy server or virus scanner restrict your web communication.
Feel free to send us an email to support@3skeng.com with a detailed description.

• Ensure you have installed all suggested Microsoft updates.
• Ensure you have the latest version of SketchUp.
• Ensure you have enabled session cookies and JavaScript.
• Check if you have installed the latest version of 3skeng, if you are in doubt, just download and install it from http://www.3skeng.com
• Do not double click any buttons and links in 3skeng. All 3skeng buttons and links are intended to be clicked one time.
• Please feel free to send us an email to support@3skeng.com with a detailed description of the problem. Clarifying screen shots are highly appreciated. We will help you as soon as possible!

Please make sure that the trays "Components" and "Outliner" are closed!
3skeng and an open "Components" and / or "Outliner" tray requires lots of computing power and may therefore lead to temporary freezing!

The most common reason is that your Credit Card company declines international transactions by default. In such a case, please contact your credit card company or issuing bank to (temporarily) unlock Germany for your 3skeng purchase(s).

In certain cases, 3skeng has to reload your account content from the server.
To do so, please click on "Check for update":
SketchUp 2015 and higher:
Extensions \ 3skeng Engineering 20xx \ maintenance \ Check for update
SketchUp 2014:
Plugins \ 3skeng Engineering 20xx \ maintenance \ Check for update
This may be the case if you purchase the tool or upgrade in one SketchUp version and open 3skeng in another SketchUp version afterwards.

Start by generating a pipeline with the pipe tool in empty space and do not connect to an existing pipeline. Make sure the switch in the upper area of the 3skeng client is set to "detail". To toggle the switch just click on the switch icon. Proceed by following the tutor in the 3skeng client window.

Most 3skeng libraries come with a basic set of fittings and components. Open the client, click on "my 3skeng" and "manage libraries...". Please consider the descriptions in the 3skeng shop and learn more about the contents of most libraries through the pdf-files.

Please send us an email to support@3skeng.com with a description of the problem and tell us your "wrong" email address and the email address you intend to use for purchases.
We will help you.

No, you don't need any transaction key or activation to use your purchased Tool(s) and Libraries. After a successful purchase, 3skeng synchronizes and asks for a restart. You can use your purchase after the next start of SketchUp.

There are multiple ways:
1) The prices are also available on the following pages: download and buy 3skeng.
2) You can download, install and activate the software and use it during a 30 day free trial period. You can find the prices for libraries and tools if you click "manage tools..." or "manage libraries...".
3) Contact your local reseller. Find a worldmap at the bottom of the page buy 3skeng to find out the reseller in your area.

That's really easy.

• Install Trimble SketchUp. We recommend to use the latest version.
• Then install newest version of 3skeng. It is best to download the latest version from our homepage.
• Start SketchUp and you will be prompted within our Activation Form to activate your 3skeng installation.
• Wait a couple of seconds and you will receive an email with your personal Activation Code. Type the code into the Activation Form.
  It is very important that you use the same email address that you used for initial activation and purchases.

That's all.

All your purchases are registered on our 3skeng Activation Server - similar to an AppStore.
The server recognizes you by your email address (your personal 3skeng-ID) during the Activation.
After reinstalling and activation all your 3skeng Tools and Libraries will be restored automatically.

You will have to reinstall the latest 3skeng version available for your Sketchup version.
If reinstalling should not work, uninstall, reboot and reinstall 3skeng.

We currently support the following 3skeng versions:

• 3skeng 2025 for SketchUp 2025, 2024 und 2023
• 3skeng 2024 for SketchUp 2024, 2023, 2022, 2021 und 2020
• 3skeng 2023 for SketchUp 2023, 2022, 2021 und 2020

The Trimble SketchUp import and export functionality including .dwg, .dxf and COLLADA file format also can be used in 2D or 3D also with all elements generated with 3skeng. Please note, that you have to purchase a Trimble SketchUp Pro license to use this functionality.

We will soon implement more functionality with tools covering major parts in scope of 3D engineering to 3skeng. The feedback from the 3skeng users will help us to set the right priorities. Check out regular this web site to see what happened in the meantime.
If you like 3skeng please give us your feedback under support@3skeng.com and let us know, what is are main tasks you are using SketchUp and 3skeng for. Please tell all your friends about 3skeng - we have many, many ideas, concepts and prototypes. The product realization speed is directly linked to the feedback and acceptance of our customers.

The 3skeng client needs connections to our servers www.3skeng.com and/or web02c.3skeng.net:

• At the very 1st start after installation to activate your 3skeng license and load the initial tool set (necessary).
• When you load additional evaluation tool.
• When you buy 3skeng tools and/or libraries.
• When you manage your account.
• From time to time to check if updates available for you.

If you want, you can prevent this connections by firewall settings (not recommended).

For purchasing over PayPal 3skeng client needs additional connections to the following servers:

• web02c.3skeng.net:443
• *.paypal.com:443
• *.paypalobjects.com:443
• paypal.d1.sc.omtrdc.net:443

For purchasing with Creditcard 3skeng client needs additional connections to the following servers:

• web02c.3skeng.net:443
• paysolution.directpos.de:443

You can access the available libraries in the 3skeng client tab by clicking on “manage libraries” and select a library of your interest (see screenshot).
Here you can learn more about the libraries content in the provided pdf-files.

We know that we cannot fulfill all our users expectations concerning library content. So we came up with a solution that allows you to make your own parts/components compatible to 3skeng functions.
The parts/components you create won’t become a part of the 3skeng library directly but 3skeng will recognise docking points and will select the appropriate pipe or connectors (e.g. Flange). This allows line attachement and also works with the functions edit/rotate and connect.

To make parts/components compatible to the 3skeng tools, you simply add one or multiple 3skeng pipe(s) (concept or detail) and/or fitting(s) (e.g. flange) inside those components, right-click on them, go to "Pin outside visible" and select the appropriate pin (Pin 0 = Start) or all pins.

Learn more in the tutorial “3skeng compatible groups & components” by clicking on the grey arrow in the tutor tab of the client window (see screenshot below)
or the menu "Extensions/3skeng Engineering 20xx/more tutorials...".