Opening - Reinforcement

After defining the dimensions of the RC slab opening, click Next. The following dialog displays:

In the upper part of the dialog, select an opening reinforcement scheme:

1. main reinforcement
2. main reinforcement and structural reinforcement
3. main reinforcement and reinforcement of corners
4. main reinforcement, structural reinforcement and reinforcement of corners.

The Main reinforcement field holds options enabling parameters of the main reinforcement of an RC slab's opening.

• Reinforcement diameter
• Reinforcement cover
• Steel grade
• Anchorage of reinforcing bars in both directions (X and Y), the anchorage depends on the diameter of selected reinforcing bars; if ‘=’ is entered before a number in the text field, the anchorage length is defined as a segment length and not as a multiple of the diameter
• Number of bars in both directions (X and Y)
• Spacing of bars in both directions (X and Y).

  Directions X and Y are shown below:

  

The options in the Structural reinforcement field are available for the second and fourth reinforcement schemes. It is an additional reinforcement perpendicular to the opening contour (see the drawing below).

Reinforcing bars of this reinforcement type have the shapes of:

• the letter U
• stirrups.

The following parameters should be specified for this reinforcement type:

• Reinforcement length depending on the reinforcing bar diameter
• Reinforcing bar diameter
• Steel grade
• Reinforcement spacing.

For the third and fourth reinforcement schemes the options in the Reinforcement of corners field are available. It is an additional reinforcement strengthening an opening corner. There are two types of corner reinforcement available:

1. 
2. .

The following parameters are available for this reinforcement type:

• Reinforcing bar diameter
• Number of reinforcing bars
• Reinforcement spacing
• Reinforcement length which depends on the reinforcing bar diameter
• Steel grade.

The example of reinforcement of a rectangular opening in a slab, with the use of all the four reinforcement schemes, is shown below.

Units used to define geometry and reinforcement of a slab opening are set in the Job preferences dialog.

The bottom of the dialog includes selection lists used to define a hierarchy of defined projects and templates; the following rules apply while creating the hierarchy:

• a project is a component superior to a group in the hierarchy
• several different groups may be defined in a project
• each group may include many templates.

Such hierarchy makes it easier to manage structure elements included in a project. It is also simpler to copy a project between two users (computers used by users), by copying a whole folder with the project name for the entire project hierarchy with all groups and templates.

The user may define an arbitrary hierarchy; the following hierarchy can be used as an example:

• Project - High-rise building
• Group - Slab 1
• Template - Opening 1.

The Template list includes user-defined templates (schemes) of reinforcement of an opening in the slab and their reinforcement. After defining the opening geometry and reinforcement, it is possible to save these settings by specifying a name in the Template field and clicking the Save button (Note: a template is saved in a selected group and a selected project). After defining the reinforcement of an opening in the slab and selecting the name of a saved template (in a selected project and a selected group), all parameters in the dialog are set exactly as they are defined in the template.

To open a template saved in a selected project and a selected group, click Load. To delete a selected template assigned to a selected project and a selected group, click Delete.

Templates saved in the macros for formworks of structure elements are available and can be loaded to the corresponding reinforcement macros. Once such a template is loaded, the Geometrytab sets parameters of the structure element geometry saved in the template.

The following buttons are located at the bottom of the dialog:

• Preview - Click to display the defined opening and reinforcement
• Back < / Next > - Click to open the dialog on the previous / next tab
• Insert - Click to place the defined opening and reinforcement in a drawing. The number of reinforcement positions and locations for the defined opening in a drawing should be defined; together with a drawing of an opening's reinforcement. A reinforcement table compliant with the settings specifed in the Job preferences dialog is inserted.