# Introduction
### About Metal Framing Wall+M
**Metal Framing Wall+M** application for Autodesk® Revit® automates the modeling, data and documentation of **Light-Gauge Steel** (LGS) / **Cold-Formed Steel** (CFS) wall frames.
The rule-based automation features help users **save time** and **eliminate** **errors** when delivering LGS frame designs for fabrication.
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**Metal Framing** offers Revit® users a solution to automate **Light-Gauge Steel stud walls** – from the modeling and clash detection to real-time take-offs and shop drawings.
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**Metal Framing** does not automate the frames or connections of Structural Steel also known as:
* Hot-rolled steel (HRS)
* Heavy steel framing
* Mild steel structural framing
* I-columns/U-beams
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**Metal Framing** is suitable for automating **LGS** / **CFS** frames designed in between Structural Steel frames.
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### Sample Libraries and Configurations
Metal Framing comes with default sample LGS framing Revit® family libraries and framing configurations that support profiles for different CNC machine brands:
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### C+U Frame
The stud sits on the web of the plate. Profiles can be screwed or fixed with an angle. Blocking/nogging/bridging profiles have different shapes (C-shaped, straps).
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**C+U** families and configurations are designed to work with **Royal CNC, Scottsdale/Scotsim and Knudson** CNC exporter.
Learn more about the [Be.Smart CNC Metal Exporter here](https://docs.besmart.software/design-data-management-and-exchange/cnc-exporters/metal/introduction).
**C+U** frame style is also commonly used for on-site assembled frames.
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Metric structural framing families:
* **M\_MF Stud-Joist** (vertical stud)
* **M\_MF Track** (horizontal plate/track/header/sill)
* **M\_MF Blocking Stud-Joist** (horizontal blocking/nogging/bridging)
* **All other families that are** **NOT C+C or C+C\_CH**
Imperial structural framing families:
* **I\_MF Stud-Joist** (vertical stud)
* **I\_MF Track** (horizontal plate/track/header/sill)
* **I\_MF Blocking Stud-Joist** (horizontal blocking/nogging/bridging)
* **All other families that are** **NOT C+C or C+C\_CH**
Learn more about [default framing families here.](https://docs.besmart.software/3d-modeling-and-design/metal-framing/wall-metal-framing/load-families)
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### C+C\_CH Frame
The stud narrows (SWAGE) before cutting through the plate lips (LIP\_CUT) and web (NOTCH) of plates. Profiles are fixed with dimples (DIMPLE). Diagonal elements have chamfered edges (END\_TRUSS).
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**C+C\_CH** families and configurations are designed to work with **Arkitech**, **Howick**, **Pinnacle**, and **Royal** CNC exporter.
Learn more about the [Be.Smart CNC Metal Exporter here](https://docs.besmart.software/design-data-management-and-exchange/cnc-exporters/metal/introduction).
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Swages are not visible in the default Metal Framing families. However, the commands are visible in the exported files for CNC fabrication.
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Metric structural framing families:
* **M\_MF C+C\_CH Stud**
* **M\_MF C+C\_CH Plate**
Imperial structural framing families:
* **I\_MF C+C\_CH Stud**
* **I\_MF C+C\_CH Plate**
Learn more about [default framing families here.](https://docs.besmart.software/3d-modeling-and-design/metal-framing/wall-metal-framing/load-families)
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### C+C Frame
The stud sits on the plate lips. Profiles are fixed with an angle.
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**C+C** families and configurations are designed for **Metroll C+C** CNC exporter.
Learn more about the [Be.Smart CNC Metal Exporter here](https://docs.besmart.software/design-data-management-and-exchange/cnc-exporters/metal/introduction).
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Metric structural framing families:
* **M\_MF C+C Stud**
* **M\_MF C+C Plate**
Imperial structural framing families:
* **I\_MF C+C Stud**
* **I\_MF C+C Plate**
Learn more about [default framing families here.](https://docs.besmart.software/3d-modeling-and-design/metal-framing/wall-metal-framing/load-families)
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### Wall Type Layers
Wall structure should be layered out in the way the parts of the framing will be modeled, e.g.
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Main Frame layer (stud layer) should have Structure function and be positioned between Core Boundaries.
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Materials for every layer are mandatory!
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Avoid abnormal wall forms which sometimes occur when a wall is attached to a roof:
### Wall modeling
Walls have to be modeled according to your framing needs. **Wall+M** has the ability to frame sloped walls, but sides of a wall should always be vertical, as it is in real life:
### Wall Splitting
**Wall+M** is capable of making frames for both on-site and modular wall framing. Splitting defines the modules of the wall.
To define framing panels, maximum height of studs, maximum length of sidings, etc., you should split the wall where you want your framing to end.
Walls should be split straight vertically or horizontally.
After splitting horizontally, the newly created wall has to be aligned with the levels which it represents.
### Knee Walls
If a wall is attached to the roof, then the framing adapts to the slope of the roof. Exterior walls have to remain horizontal for placing structural elements, e.g. girders
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*For knee walls to work as expected, wall function has to be set to Exterior.*
*If wall is left unattached to roof, the top plate of that wall will always be horizontal.*
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