Columns (57)

Columns (57) creates typical longitudinal and tie reinforcement for a column.

Reinforcement created

Prestress strands for longitudinal reinforcement in a column
Mild longitudinal bars for longitudinal reinforcement in a column
Reinforcement for composite rectangular columns

Use for


Situation	More information
To define longitudinal prestress reinforcement size and location
To define longitudinal mild reinforcement size and extent
To define tie size and spacings

Before you start

Create the column.
Calculate the required area and quantity of strands and other reinforcement.
Define other reinforcement properties.

Strand reinforcement tab

Use the Strand reinforcement tab to define strand attributes and for a description of the geometric layout of pre-stress strands in the column.

This tab lets you define the strand reinforcement in the primary section of the column. Up to 8 strands may be defined.


Option	Description
Size	Define the size of the strands by selecting if from the reinforcing bar catalog.
Grade	Define the strand grade.
Pull	Define the pull force of the strands.

Specify strand-centerline-to-surface dimension, de. For corner strands 1-4, this distance defines the strand centerline position relative to both adjacent column faces. For strands 5-8, the strand is located on the face centerline, offset from the face by distance de.

Longitudinal rebar tab

Use the Longitudinal rebar tab to define the longitudinal reinforcement to be used in the primary section of the column.

Reinforcement pattern

Longitudinal bars are presumed to run the entire length of the column (less the End Clearance distance at each end of the member). Standard longitudinal reinforcement configurations are provided in a convenient drop-down, and up to 12 bars may be defined.

Select the desired reinforcement pattern from the drop-down combo-box. There are 10 predefined patterns:


Description	Option
4 Bar Symmetrical
6 Bar X-X
6 Bar Y-Y
8 Bar Symmetrical
8 Bar X-X
8 Bar Y-Y
10 Bar X-X
10 Bar Y-Y
12 Bar X-X
12 Bar Y-Y

Rebar properties


Option	Description
de	Specify the reinforcing bar-centerline-to-surface dimension. This value is used to locate most of the bars in each pattern.
d1	Specify the dimension, which is used in only the 10- and 12-bar patterns to locate off-axis bars. This value should default to the half the appropriate primary section dimension less de, divided by 2.
End clear distance	Specify the end clear distance for both ends of the longitudinal reinforcing bars.
Size	Select the size of the bar at each bar location.
Grade	Select the grade of bar at each bar location.

Primary ties tab

Use the Primary ties tab to define the ties used in the primary section of the column.

Reinforcement pattern

Primary ties are distributed along the entire length of the column.

First select the desired tie reinforcement pattern from the list box. There are 16 predefined patterns to choose from. The longitudinal reinforcing bar selection will affect which of these patterns can be used. The component will verify that the primary tie configuration correlates with the primary longitudinal reinforcement configuration. Furthermore, the location or stirrup in section may depend on the location of longitudinal bars (e.g. 8-bar X-X).


Description	Option
4 Bar Symmetrical
6/10 Bar X-X (A)
6/10 Bar X-X (B)
6/10 Bar Y-Y (A)
6/10 Bar Y-Y (B)
8 Bar Symmetrical (A)
8 Bar Symmetrical (B)
8 Bar Symmetrical (C)
8 Bar X-X (A)
8 Bar X-X (B)
8 Bar Y-Y (A)
8 Bar Y-Y (B)
12 Bar X-X (A)
12 Bar X-X (B)
12 Bar Y-Y (A)
12 Bar Y-Y (B)

Properties


Option	Description
Tie size	Select the size of the tie bar.
Tie grade	Select the grade of the tie bar.
Hook type	Select the tie hook type. The options are 90-degree and 135-degree hooks.
c1	Specify the minimum clear cover. The component must verify that with the clear cover specified the tie properly fits around the longitudinal reinforcing bar with the locations specified in previous tab.
d1	Specify the distance to the centerline of the first tie from the top and bottom. Often there are anchor bolt pockets at the bottom of columns. The component should interpret the d1 distance to be above those pockets.
X	Specify the quantity.
Spacing	Define the reinforcing bar spacing. Use a space to separate spacing values. Enter a value for each space between the reinforcing bars. For example, if there are 3 reinforcing bars, enter 2 values.
Bars	Define the number of reinforcing bars.
Same as left end	Define whether the same spacing and reinforcing bar properties are used at the right end.

Secondary reinforcement tab

Use the Secondary reinforcement tab to define the longitudinal bar and ties used in the secondary section(s) of the column.

The component will automatically determine these sections from the column geometry.


Option	Description
Longitudinal bar size	Select the bar size for the secondary longitudinal bars.
Longitudinal bar grade	Enter the grade for the secondary longitudinal bars.
Tie size	Select the bar size for the secondary ties.
Tie grade	Enter the grade for the secondary ties.
Min. clear cover c2	Specify the minimum clear cover from the secondary longitudinal bars to the column face.
End clear distance	Specify the end clear distance from the top and bottom of each secondary section to the ends of the secondary longitudinal bars.
Hook type	Select the secondary tie hook type. The options are 90-degree and 135-degree hooks.
Spacing	Define the reinforcing bar spacing. Use a space to separate spacing values. Enter a value for each space between the reinforcing bars. For example, if there are 3 reinforcing bars, enter 2 values.
Bars	Define the number of reinforcing bars.
Same as left end	Define whether the same spacing and reinforcing bar properties are used at the right end.

Circular column tab

Use the Circular column tab to define the reinforcement parametrics for circular columns.

The component will only create reinforcement in constant diameter members. Tapered columns and circular columns with ledges are not supported.


Option	Description
Number of main bars	Specify the desired number of main bars in the column, from 4-12.
Main bar size	Select the size of the main bar.
Main bar grade	Select the grade of the main bar.
Tie size	Select the size of the tie bar.
Tie grade	Select the grade of the tie bar.
c1	Specify the tie clear cover.
End clear distance	Specify the end clear distance from the top and bottom of each secondary section to the ends of the secondary bars.
d1	Specify the top end distance from the centerline of the first tie to the top of the column.
d2	Specify the bottom end distance from the centerline of the last tie to the bottom of the column. Often there are anchor bolt pockets at the bottom of columns. The component should interpret the d2 distance to be above those pockets.
X, s1	Specify the quantity, X, and spacing, s1, of the first group of ties at top and bottom.
Max. spacing	Specify the maximum spacing, s2, of primary ties throughout the length of the column.
Bars	Define the number of reinforcing bars.
Spacing	Define the reinforcing bar spacing. Use a space to separate spacing values. Enter a value for each space between the reinforcing bars. For example, if there are 3 reinforcing bars, enter 2 values.

Attributes tab

Use the Attributes tab to define naming and numbering of the reinforcement.


Option	Description
Prefix	Prefix for the part position number.
Start number	Start number for the part position number.
Name	Tekla Structures uses the name in drawings and reports.
Class	Use Class to group reinforcement. For example, you can display reinforcement of different classes in different colors.
Minimum cut size	Define the minimum length of the boundary of cut/hole, to be considered as cut in this field. The default value is 200 mm.

Strand code

Store strand code – With option Store strand code you may choose to store (or not) a user-defined textual attribute TS_STRAND_CODE to part.

Strand code – In field Strand code you may enter a string template for the value of the above mentioned user-defined attribute. The default template is the total number of created strands. The template may contain any text and the predefined fields for:

%NUMBERS – is the numbers of created strands with different sizes and/or grades e.g. 10 (for one size & grade) or 6+4 (if two sizes and/or grades has been used).
%SIZES – sizes of the strands e.g 1/2 or 1/2 + 3/8.
%GRADES – grades of strands.

Strand creation at voids

Create strand at voids – The option Yes will show the strands even though the voids are present. The option No will not show the strand if void is present at any location along the strand path.

Select to cut the strands at void locations from Cut strands at voids.