Example Slab Having Mesh Of Straight Rebars

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Freecad.svg Tutorial
Topic
Example Slab Having Mesh Of Straight Rebars
Level
Intermediate
Time to complete
Authors
Shiv Charan
FreeCAD version
0.20
Example files
See also
None

Description

The Slab Reinforcement tool allows the user to create reinforcing bars inside a Slab Arch Structure object.

This command is part of the Reinforcement Workbench, an external workbench that can be installed with the Std AddonMgr.svg Addon Manager via the Tools → Addon manager → Reinforcement menu.

In this example we will create Slab Reinforcement for Slab having Mesh of Straight Rebars (straight rebars in both parallel and cross direction ) as shown in below figure.

Slab having straight rebars in both direction.png

A Example of Slab Reinforcement of Slab Spanning having Straight Rebars in Slab Arch Structure

Usage

1. Select any face of a previously created Slab Arch Structure.svg Arch Structure object. as shown in below image.

Selected face for Slab Arch Structure.png

Selected face for Slab Arch Structure

2. Then select Arch Rebar Slab Reinforcement.svg Slab Reinforcement from the rebar tools.

3. A dialog box will pop-out on screen as shown below.

Slab Reinforcement input dialog box.png

Dialog Box for the Slab Reinforcement

4. Select the desired type of cover of reinforcement mesh (Top or Bottom) In example Bottom is selected.

5. Select the StraightRebar rebar type and other input data for rebars in parallel direction of selected face as show in below image.

Straight Rebars in parallel for Slab Spanning in One Direction.png

Dialog Box for Slab Reinforcement of the Rebars in parallel direction of selected face

6. Now click on Next button or select Cross Rebars in list view.

7. Now select StraightRebar rebar type and other desired data for input data for rabars in cross direction of selected face as show in below image.

Straight rebars in cross direction.png

Dialog Box for Slab Reinforcement of the Rebars in cross direction of selected face

8. Click OK or Apply or Finish to generate Slab reinforcement.

9. Click Cancel to exit the dialog box.

Properties Used for Slab Spanning in One direction

Properties for Rebars in Parallel Direction to selected face:

  • DataMesh Cover Along: It represent alignment of rebar mesh along top or bottom face of structure. It can have two values "Top" and "Bottom".
  • DataRebar Type: Type of rebar for parallel rebars for slab reinforcement. It can have four values 'StraightRebar', 'LShapeRebar', 'UShapeRebar', 'BentShapeRebar'.
  • DataFront Cover: The distance between parallel rebar and selected face.
  • DataLeft Cover: The distance between the left end of the parallel rebar to the left face of the structure.
  • DataRight Cover: The distance between the right end of the parallel rebar to right face of the structure.
  • DataBottom Cover: The distance between parallel rebars from the bottom face of the structure.
  • DataTop Cover: The distance between parallel rebars from the top face of the structure.
  • DataRear Cover: Rear cover for slab reinforcement of parallel rebars.
  • DataDiameter: Diameter of parallel rebars
  • DataAmount: It contains count of parallel rebars.
  • DataSpacing: It contains spacing between parallel rebars.

Properties for Rebars in Cross Direction to selected face:

  • DataRebar Type: Type of rebar for cross rebars for slab reinforcement. It can have four values 'StraightRebar', 'LShapeRebar', 'UShapeRebar', 'BentShapeRebar'.
  • DataFront Cover: The distance between cross rebar and selected face.
  • DataLeft Cover: The distance between the left end of the cross rebar to the left face of the structure.
  • DataRight Cover: The distance between the right end of the cross rebar to right face of the structure.
  • DataBottom Cover: The distance between cross rebars from the bottom face of the structure.
  • DataTop Cover: The distance between cross rebars from the top face of the structure.
  • DataRear Cover: Rear cover for slab reinforcement of cross rebars.
  • DataDiameter: Diameter of cross rebars
  • DataAmount: It contains count of cross rebars.
  • DataSpacing: It contains spacing between cross rebars.

Scripting

See also: Arch API, Reinforcement API and FreeCAD Scripting Basics.

The Slab Reinforcement tool can be used from the Python console by using the following function:

Create Slab Reinforcementof Slab Spanning having Straight Rebars Reinforcement

To create Slab reinforcement having Straight Rebars Reinforcement shown in above figures you can use makeSlabReinforcement function as follows:

from SlabReinforcement.SlabReinforcement import makeSlabReinforcement
SlabReinforcementGroup = makeSlabReinforcement(
    parallel_rebar_type="StraightRebar",
    parallel_front_cover=20,
    parallel_rear_cover=20,
    parallel_left_cover=10,
    parallel_right_cover=10,
    parallel_top_cover=30,
    parallel_bottom_cover=20,
    parallel_diameter=8,
    parallel_amount_spacing_check=False,
    parallel_amount_spacing_value=50,
    cross_rebar_type="StraightRebar",
    cross_front_cover=20,
    cross_rear_cover=20,
    cross_left_cover=10,
    cross_right_cover=10,
    cross_top_cover=29,
    cross_bottom_cover=20,
    cross_diameter=8,
    cross_amount_spacing_check=False,
    cross_amount_spacing_value=50,
    mesh_cover_along = "Bottom",
    structure=App.getDocument("slab").getObject("Beam"),
    facename='Face4',
)
  • Creates a SlabReinforcementGroup object for Slab Spanning having Straight Rebars Reinforcement from the given structure, which is a Slab Arch Structure, and facename, which is a face of that structure.
    • If no structure nor facename are given, it will take the user selected face as input.

Properties used for slab spanning in two direction for scripting

Properties for Rebars in Parallel Direction to selected face:

  • Dataparallel_rebar_type: Type of rebar for parallel rebars for slab reinforcement. It can have four values 'StraightRebar', 'LShapeRebar', 'UShapeRebar', 'BentShapeRebar'.
  • Dataparallel_front_cover: The distance between parallel rebar and selected face.
  • Dataparallel_rear_cover: Rear cover for slab reinforcement of parallel rebars.
  • Dataparallel_left_cover: The distance between the left end of the parallel rebar to the left face of the structure.
  • Dataparallel_right_cover: The distance between the right end of the parallel rebar to right face of the structure.
  • Dataparallel_top_cover: The distance between parallel rebars from the top face of the structure.
  • Dataparallel_bottom_cover: The distance between parallel rebars from the bottom face of the structure.
  • Dataparallel_diameter: Diameter of parallel rebars.
  • Dataparallel_amount_spacing_check: If is set to True, then value of parallel_amount_spacing_value is used as rebars count else parallel_amount_spacing_value's value is used as spacing in parallel rebars.
  • Dataparallel_amount_spacing_value: It contains count of rebars or spacing between parallel rebars based on value of amount_spacing_check.

Properties for Rebars in Cross Direction to selected face:

  • Datacross_rebar_type: Type of rebar for cross rebars for slab reinforcement. It can have four values 'StraightRebar', 'LShapeRebar', 'UShapeRebar', 'BentShapeRebar'.
  • Datacross_front_cover: The distance between cross rebar and cross_face (face perpendicular to selected face).
  • Datacross_rear_cover: Rear cover for slab reinforcement of cross rebars.
  • Datacross_left_cover: The distance between the left end of the cross rebar to the left face of the structure.
  • Datacross_right_cover: The distance between the right end of the rebar to right face of the structure relative to cross_face.
  • Datacross_top_cover: The distance between cross rebar from the top face of the structure.
  • Datacross_bottom_cover: The distance between cross rebar from the bottom face of the structure.
  • Datacross_diameter: Diameter of cross rebars.
  • Datacross_amount_spacing_check: If is set to True, then value of cross_amount_spacing_value is used as rebars count else cross_amount_spacing_value's value is used as spacing in rebars.
  • Datacross_amount_spacing_value: It contains count of rebars or spacing between rebars based on value of cross_amount_spacing_check.

Common Properties for Parallel and Cross Rebars:

  • Datamesh_cover_along: It can have two values "Top" and "Bottom". It represent alignment of rebar mesh along top or bottom face of structure.
  • Datastructure: Arch structure object. Default is None
  • Datafacename: selected face of structure. Default is None

Edition of Slab Reinforcement of Slab Spanning having Straight Rebars Reinforcement

You can change the properties of the Slab Reinforcement for Slab Spanning having Straight Rebars Reinforcement by using editSlabReinforcement function as follows

from SlabReinforcement.SlabReinforcement import editSlabReinforcement
SlabReinforcementGroup = editSlabReinforcement(
    SlabReinforcementGroup,
    parallel_rebar_type="StraightRebar",
    parallel_front_cover=20,
    parallel_rear_cover=20,
    parallel_left_cover=10,
    parallel_right_cover=10,
    parallel_top_cover=30,
    parallel_bottom_cover=20,
    parallel_diameter=8,
    parallel_amount_spacing_check=True,
    parallel_amount_spacing_value=10,
    cross_rebar_type="StraightRebar",
    cross_front_cover=20,
    cross_rear_cover=20,
    cross_left_cover=10,
    cross_right_cover=10,
    cross_top_cover=20,
    cross_bottom_cover=20,
    cross_diameter=8,
    cross_amount_spacing_check=True,
    cross_amount_spacing_value=10,
    mesh_cover_along = "Bottom",
    structure=App.getDocument("slab").getObject("Beam"),
    facename='Face4',
)
  • slabReinforcementGroup is a previously created Slab Reinforcement group object.
  • The other parameters are the same as required by the makeSingleTieFourRebars() function.

you can change any property to edit Slab Reinforcement.