Painterly illustration of a cutaway studio built with T-slot aluminum framing: a standing desk, shelving, an acrylic machine enclosure, a camera rig and a clamped workbench

T-slot framing

T Slot Design Software

Design T-slot aluminum racing rigs, lab carts and frames in 3D on your computer or phone. Only compatible joints and accessories snap onto each rail.

How it works

From idea to parts list in three steps

  1. 01

    Snap the frame together

    Bring a rail or bracket close to an open slot and it seats into place, lined up with the rest of the frame.

    Watch the demo
  2. 02

    See every rail and fastener

    The parts list counts each rail by length along with brackets, panels and screws, and the cut plan shows how to cut them from stock.

    Watch the demo
  3. 03

    Build it in order

    Step-by-step assembly guides show which parts join at each step, so the frame goes together the first time.

    Watch the demo

Snap-to-Connect

Snap-to-Connect demo

Bring a loose part close to a supported connection point and it seats into place, lined up with the rest of your build. Snapping takes the fiddly guesswork out of joining uprights, rails and other members, so each piece meets its neighbour at the connection itself rather than just floating nearby.

What Connects to What?

What Connects to What? demo

Click an open end on a pipe or fitting and the parts drawer opens with compatible options, such as the next elbow or length of pipe. Pick one to attach it at that joint. On PVC pipe projects, the next part comes from the joint that needs it, not a long catalog hunt.

Auto-Adjust the Design Based on Joints

Auto-Adjust the Design Based on Joints demo

Drag one handle and a connected design changes size, with related members adjusting together. Try a wider pergola, bench or pipe frame. It works on builds of at least three connected parts, one with a flexible length, and the directions you can drag depend on the structure.

Make It Flush!

Make It Flush! demo

Line up a part's face or edge with its neighbor's boundary without resizing either piece. Select the part, pick the edge you want it to meet as the alignment reference, and it moves into position along that boundary. It is a quick way to get flush edges on shelves, frames and workbench builds.

What Parts Do I Need?

What Parts Do I Need? demo

Every board, pipe and fitting you add shows up in a parts list beside your 3D model, with quantities that update as the design changes. Hover a row to find those parts in the scene, then check the counts before you cut or shop. Your design becomes a list you can review line by line.

Get Your Cut Plan

Get Your Cut Plan demo

Find out how many stock lengths your project needs before you buy. Choose a stock length and see your finished pieces laid out along each length, with the leftover shown. Your parts list becomes a simple cut list, so you can plan the trip to the lumber yard with fewer surprises.

Instant Assembly Guides

Instant Assembly Guides demo

See how your project goes together, one numbered step at a time. Each step names the parts to join, marks where they connect, and shows that subassembly within the whole build. It turns a finished 3D model into clear woodworking plans you can review before you head to the shop.

Massive Library of Real Parts

Massive Library of Real Parts demo

Over 7,300 real parts across 346 categories, ready to drop into your design: lumber in every common size, pipe and fittings in PVC, copper and steel, 80/20 aluminum framing, steel tube and bar, screws and brackets, wheels, casters and actuators, electrical and HVAC parts, plus people, plants and furniture for scale.

See all 27 features

The parts library

T-slot extrusion and accessories in the library

Frames, enclosures, carts and workstations are built from the same rails, joints and accessories you'd order, each matched to its slot size.

Counted from the live catalog. Search every part in the library.

Why Crafti

Made for T-slot projects at any skill level

Illustration of a person inspecting a box of parts with a magnifying glass

Am I Doing This Right?

Many new users purchase incompatible T-slot Aluminum parts, resulting in lots of frustration and lots of lost $$$. When you use Crafti you can rest assured that the aluminum parts you've design with are fully compatible. Whatever can be connected to another part is compatible!

Illustration of a person on a skateboard sketching an idea

Racing Rig or Lab Cart? It's All Possible

Whether you're looking to create a basic aluminum T-Slot truck bed or an incredible tricked-out racing simulator, the possibilities are endless! Just start with something simple and let your imagination run wild. It's a fantastic playground to bring your ideas to life and have some fun!

Read more

Crafti is so simple and fast that you can get immersed in your ideas instead of learning a new complicated app to design something with t-slot extrusions.

Illustration of a person lifting a giant wrench overhead

It's Easy to Learn When You're Having Fun!

When you're not an expert in modular aluminum framing, it can be really intimidating to try building something on your own.

Read more

Especially considering that T-slot parts can be quite pricey.

But fear not!

You have the freedom to start with a blank canvas or modify existing T slot designs to suit your needs. You'll be able to extend / shorten / delete / add new aluminum parts to any design you see!

Illustration of a person with a light bulb idea

Made Lots of T-Slot Projects Before? Or Your 1st? Doesn't Matter!

Whether you're engineer that design T-slot projects all day or just a passionate hobbyist, it doesn't matter.

Read more

We've made it easy for the novice to start working with T-slot components but also have a very expansive library for the expert.

Our DIYers' app mission is to make building and designing your ideas accessible to everyone.

We believe that this versatile material should be within reach for all, regardless of skill level or background.

So, no matter who you are or where you come from, we're here to empower you with the possibilities of T Slot Aluminum and help you bring your DIY ideas to life.

All the T-Slot Components You Need

We've worked hard to identify the most common aluminum parts but don't hesitate to reach out if you see any parts missing or if you wish to access a specific t-slot design in our example section.

80/20 parts library: panel hangers, mesh and acrylic panels, roller wheel
80/20 parts library: rail hinge, panel hanger, tablet arm, wheel and end cap
80/20 parts library: T-slot rails, track panel slide and end inside joint

Is that T- Slot component compatible with this one?

We know the size, type and depth of each connection of an aluminum T-Slot So we show you only compatible joints and accessories when you're designing an aluminum project!

Compatible 80/20 parts shown around a T-slot rail’s connection points

T-slot framing

Why T-Slot Aluminum?

T-slot aluminum is often referred to as "Legos for Adults" because of its incredible versatility. It's a fantastic option to any project that requires lightweight + strong material. It's a great alternative to steel because it's lighter and it doesn't require welding so this means it can be easily assembled and disassembled.

Read more

The "T" slot design on all four sides gives you the freedom to easily add more rails or accessories without any cutting involved. Components such as nuts, bolts, and connectors can be easily inserted into the slots with no special tools. Despite its lightweight nature, it delivers impressive strength allowing you to bear considerable weight. People have used T-slot aluminum in a wide range of places, from labs, warehouses, and pickup trucks to vans and schools. Basically, whenever you need a durable and customizable solution without the need for welding, T-slot aluminum is the way to go!

Fill Your Cart

Once your design is ready, Crafti matches every line on your parts list to a store product and fills your cart at McMaster-Carr, The Home Depot or Lowe's. You review it before checkout, and nothing is bought until you decide.

80/20 aluminum parts list with rail lengths and quantities

Questions

T-slot design questions

Is T-slot the same as 80/20?

80/20 is a popular brand of T-slot aluminum extrusion. Crafti's library uses its profile series, so designs work for either name.

Can I add acrylic panels and doors?

Yes. Panels, panel hangers, hinges and handles are in the library, so you can design enclosures with doors.

Can I see the frame's exact rail lengths?

Yes. Every rail is listed with its length, and the cut plan groups them by stock length.

Is this a downloadable app?

No! It all works on the browser. It works on your phone as well as your computer!

Can I save my design?

Yes! You can save your design in your account.

Can I share my design?

Yes! You'll have a unique URL for every design you save which you can send to anyone! They can then see or clone the design. They cannot edit your design. You can also delete it whenever you'd like.

What materials do you support?

Crafti has 7,300+ parts across aluminum 8020, steel, wood, HVAC and PVC! Let us know if we're missing a part.

Where did the idea for this app come from?

I spent a year building an off grid farm and knew nothing about construction / plumbing / electrical work…
I saw that most people had to go the hardware store multiple times and many times they weren’t able to finish their work that day because the vendor didn’t have the part. So I thought if you can design your project beforehand, it will allow us to check for compatibility while you’re designing and then fill your cart at the store with everything you need! Much easier!

Can I connect PVC to wood, t-slot / aluminum 8020?

Yes. There are transition parts that allow you to connect PVC to wood or wood to aluminum 8020. If there is interest, we will start adding parts like motors and electrical components as well.

The idea for Crafti is to be a place where you can design your entire project with all of its components so when you want to get to building, all you need to do is review your cart and check out!

Can I buy the parts through Crafti?

Crafti doesn't sell parts itself. When your design is ready, it fills your cart at McMaster-Carr, The Home Depot or Lowe's so you can review everything before you check out.

How do you deal with long and heavy parts (like 2x4s)?

When you have parts longer than 36" or of a certain kind (like lumber beyond a certain WxH), we just give you the dimension / exact length for you to go buy that at your local store.

Are you going to add more parts?

Yes. We keep adding parts and features based on the feedback we get, so let us know what you need!

Why not just use CAD?

You can! If you have all the parts downloaded already and are an expert in CAD software. Also, I would hope that your CAD software gives you a clean output of all the parts / their exact measurements.
What CAD software won't do is allow you to share the design online and allow others to see your design and specs.

Do you have tips I can follow for different materials?
Do you have any tutorials on how to use the app?
Do I need Crafti Pro?

No. You can design for free, and many features work in the free version. Crafti Pro unlocks some features and includes monthly credits for Crafti AI. See Pricing for what it includes.

Start Your T-slot Project

Design in your browser on your phone or computer, then get the parts list, cut plan and assembly steps.

Start a Project

Crafti Pro

More room to build, create and bring your ideas to life.

  • Use your Claude/ChatGPT subscriptions to power Crafti AI
  • Private designs and invites
  • Save more than three designs
  • Custom part uploads
  • Export your designs (GLB, STL, OBJ...)
  • Generate Assembly Instructions
  • Included credits to use with Crafti AI
Billing interval
Subscribe

Already subscribed? Manage your subscription