Slab Design Settings

Slab Design Settings

You can display the settings and parameters of “Slab”  in “Settings” menu.

Design

Basic design settings are controlled on this tab.

Support Top Steel

Support top bars lengths are determined using the factors specified in “Top Steel Extension Lengths” fields. These multipliers are applied to the effective span lengths of the slabs. Also, user can define minimum of moment of span to be taken into account in designing the slab.

Slab Span Lengths in Analysis

You can use these fields to toggle using "Use Clear Span" or "Use Centerline Span" (spans calculated between centre-line of beams).

Support Band Beam Width

You can use these fields to toggle using "Use 25% of Non-adjacent Slab Edge" or "25% of Short Edge of Slab" (spans calculated between centre-line of beams).

Ribbed Slab Filler Blocks Unit Weight

This field requires users to input the value for unit weight of ribbed slab filler blocks.

Slab Steel Concrete Cover 

Depth of concrete cover for slabs can be given in the "Slab Steel Concrete Cover" field.
If you leave this field as zero then the concrete cover will be determined based on active codes.

Rebars

Steel bar selection and layout settings are controlled on this tab.


Slab Steel Pattern

For slab reinforcement, the Bar Pattern options are “Bent-up Pattern” & “Straight Bar Pattern”. 

Slab Bar Spacing

Minimum and maximum steel bar spacing for slabs can be provided in “Slab Bar Spacing” fields. When the spacing determined for a steel bar is less than the minimum spacing, then the program will increase the diameter of the bar automatically.

Steel Bar Spacing Step

Steel bar spacing values will be rounded up to the “Steel Bar Spacing Step” value provided in this field.
For example, if the Steel Bar Spacing Step is provided as  “25 mm”, then the calculated spacing values will be as 150, 175, 200, 225 etc.

Steel Bar Length Step

Steel bar lengths will be rounded up according to the “Steel Bar Length Step” value provided in this field.
For example, if the Steel Bar Length Step is “50 mm”, length values calculated will be rounded up to end up with 50’s.

Steel Bar Edge Clearance

In slabs, steel bars parallel to an edge of the slab starts at a small distance from the edge of the slab. This distance can be defined in the “Steel Bar Edge Clearance” field. Steel Bar Span Lines will be set considering this value.

Make Bob for Top Steel Cantilevers

If you check the “Make Bob for Top Steel Cantilevers” option, top steel bars in cantilever slabs will end with bobs. Otherwise, the steel bars will end with hooks at the end of the cantilever slab.

Put Slab Support Bars to 1st Layer in Both Directions

This field can be checked if it is preferred to put all the support bars to 1st layer. Otherwise, the program will determine the layer of the bars based on the slab dimensions.

Extend Support Bars Symmetrically When Slab Spans Vary

If you like to extend the support bars symmetrically to the slabs you can check this option. If this option is checked, larger effective span length is used to control the length of the support bar.

Put Bent-up Bars Along Long Edges of One-way Slabs

By default, bent-up bars are not placed along the long edges of the one-way slabs. You can check this option if you want to put bent-up bars along the long edges of the one-way slabs.

Appearance

This tab is used to control how the steel bars are displayed.


Slab reinforcement can be displayed either with all the segment lengths or with only the total length. If you check the “Print Steel Bar Segment Length” option, then all the segment lengths of bars will be displayed on the drawing.

If you check the “Print Steel Bar Total Length” option, the total length of each steel bar will be displayed on the drawing. 

Show No. of Bars in Bar Label

If you check this field, the number of bars calculated based on the spacing and length of the span lines will be suppressed.

A steel bar in a slab can be on the top or bottom of the section. Similarly, according to its direction the same bar can be on the first or second layer from the top or the bottom. If you check the “Display Steel Bar Layer Information” option, then the position and the layer of the reinforcement will be indicated.
If you check “Print Alternative Layer Information” option, following texts will be printed as steel bar layer information:
  • TT: 1st Layer of Top Steel (T1)
  • TB: 2nd Layer of Top Steel (T2)
  • BB: 1st Layer of Bottom Steel (B1)
  • BT: 2nd Layer of Bottom Steel (B2)


Steel Bar Positions

Display Bar Marks in Detail Drawings (Slab and Footing Details)

If you check this option, the bar marks of each steel bar (Slab and Footing) will be displayed on the drawing. 

Transverse Rib Insertion Conditions

In this field, users are required to enter value of "First Transverse Rib Distance Limit" and "Second Transverse Rib Distance Limit".

Slab Hole

In this field, user can choose the visual of slab hole in the model, either present as "X" or "Y".

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