Creating slabs




The DMEXTRUDE command allows to extrude a closed 2D entity such as polylines, circles, ellipses and extrude a detected boundary, enclosed by walls and/or 2D entities.

The POLYSOLID command allows to create pitched roofs.

Creating floor slabs between walls

Make sure that:
  • The Enable Boundary Detection option of the SELECTIONMODES system variable is ON.
  • The bottom faces of the surrounding walls are in the XY-plane of the current coordinate system.

    If necessary, move the origin of the coordinate system.

  • Dynamic dimensions are ON.
  1. Move the cursor inside the surrounding walls.
  2. When the boundary highlights, choose Extrude in the Model command group in the Quad.

    The slab is extruded dynamically.

  3. Do one of the following:
    • Type the thickness of the slab in the dynamic dimension field.
    • Pick a point.

Creating a pitched roof slab

Make sure that:
  • Dynamic UCS is ON.
  • Dynamic dimensions (DYN) is ON; it is recommended to have the Tracking dynamic dimensions option of the DYNMODE system variable set.
  • Entity Snap Tracking (STRACK) is ON.
  • Endpoint entity snap is ON.
  1. Launch the POLYSOLID command.

    You are prompted: Start point or [Height/Width/Justification/Entity/Separate solids/Dynamic] <Entity>:

  2. Move the cursor over the outside face of a wall which is perpendicular to the roof slab you want to create.
  3. When the face highlights, hit the Shift key to lock the dynamic UCS.
  4. Do one of the following:

    To create the roof at the top edge of the wall, snap to the exterior top corner of the wall.

    To create a roof overhang (eave):
    • Move the cursor over the exterior top corner of the wall to require a snap tracking point.
    • When a small red cross indicates the tracking point is acquired, move the cursor to the outside and type the overhang distance in the dynamic entry field.

  5. Hit the TAB key to activate the Angle field, then type the pitch angle and hit the TAB key again to jump to the Distance field.

  6. Specify the height of the roof slab, then press Enter twice: the first Enter creates the footprint of the roof slab, the second Enter interrupts the creation of a second solid.

    The roof slab is extruded dynamically.

  7. Specify a point to define the length of the extrusion.

  8. Repeat the previous steps to create more roof slabs.
  9. Use CONNECTWITHNEAREST to connect the walls to the roof slabs.