Introduction You can use the rules listed in the sections below to accurately select connections and
connection properties when using AutoConnection and AutoDefaults. Using these rules you can create your own standards to apply project or company defaults.
General The general rules are:
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Profile name: the name in the Name field in the Profile catalog dialog box.•
Profile type: use the following table to find the correct number:Profile type Number
I 1
L 2
Z 3
U 4
Plate 5
Round bar 6
Pipe 7
Square pipe 8
C 9
T 10
ZZ 15
CC 16
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Number of secondaries.•
Number of primaries.•
Material name.Orientation Depending on the relative angle a beam, the connections can be classified as:
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Sloped angle (relative to primary part cross section)The longitudinal axis of the secondary part follows the slope of the longitudinal axis of the primary part.
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Skewed angle (relative to primary part longitudinal axis)The longitudinal axis of the secondary part is skewed according to the primary part cross section. The angle is the smaller of the angles between the longitudinal axis of the secondary part and the primary part Z or Y axis.
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Cant angleFor rotated secondary parts.
Dimensions
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Profile depthCW 17
Polygon plate 51 Profile type Number
Sloped, skewed, and cant angle value can be 0 - 90 degrees. Do not use negative values.
For profiles with an upper and lower flange, web depth is:
To use either of these features for a rule set:
1. Click Detailing > AutoConnection > AutoDefault Settings...
2. Browse the tree and right-click a rules set.
3. Select Edit rule set...
4. Set Parameters files selection to one of the following options:
Feature Description
Combining You can save connection properties files covering different groups of properties, then use these files to define many rules. For example you can have one file for bolt properties and another for profile properties. Tekla Structures combines the files when it runs AutoDefaults.
Iterating Tekla Structures tests properties until the connection symbol is yellow or green. Iteration changes connection properties automatically if connection fails, even if the rules would match. If Connection Check is set on, the iteration results in connection properties that have passed the check.
Option Description
Use combination of first parameters
Tekla Structures uses the properties files it finds in the first matching sub-rule set and does not check other rule sets.
Iterate until the connection symbol is green
Tekla Structures checks sub rule sets until it finds matching properties that leave the connection symbol green.
Limitations
Tekla Structures cannot iterate properties files directly. Use a single iteration rule set with sub rule sets.
You cannot have many parallel iteration rule sets. Use a single iteration rule set and place it just before the default rule set.
Place the combination rule sets above the iteration rule set in the tree.
Combination rule sets can only be one level deep.
Tekla Structures disregards empty rule sets, so include at least one rule in each rule set.
See also Combining properties (p. 162)
Iteration with connection check (p. 163)
Combining properties
The AutoDefaults combine feature combines separate properties files into one file. This means you define fewer files, because you use one file for several rules. If files contain different values for the same property, Tekla Structures uses the last property it finds. See the image below.
Iterate until the connection symbol is yellow
Tekla Structures checks sub rule sets until it finds matching properties that leave the connection symbol yellow.
Use combination of all parameters
Tekla Structures checks all rule sets and uses prop-erties files in all matching rule sets. The order of properties files is important, since the last over-rides.
The order of files in the tree is important. When Tekla Structures combines the properties files, the most recent files (the lowest in the tree) override previous ones. If you leave properties blank, Tekla Structures does not override previous properties with blank properties.
Option Description
See also Combining and iterating properties (p. 161)
Iteration with connection check
This example shows how you can use the iteration feature of AutoDefaults. In this example iteration sets the number of bolts according to the result of the connection check.
When using this rule group for a connection in the model, AutoDefaults sets the number of bolts until the connection symbol is green.
Creating iteration rules
First, create connection properties files for each number of bolts. See Editing connection properties (p. 158).
1. Click Detailing > AutoConnection > AutoDefaults Settings...
2. Right-click the tree and select New rule group. Click the rule group and rename it to
"Iteration example".
3. Browse the tree and find connection 144. Right-click it and select Create additional rule sets....
4. Right-click the rule set and select Edit rule set..., to open the AutoDefault rules dialog box.
5. Change the Rule set name to "ITERATION".
6. Set Parameters file selection to Iterate until the connection symbol is green. 7. Click OK.
8. To create a rule set "2 bolts", right-click the first rule set and select Create additional rule sets....
9. Right-click the new rule set and select Edit rule set.... AutoDefault rules dialog box appears.
10. Select rule Secondary 1 depth and set the minimum and maximum depth values for two bolts.
11. Set Parameters file selection to Use combination of first parameters. 12. Click OK.
13. Right-click the connection properties file standard.j144, and click Select connection parameters.. to open the Attribute File List dialog box. Select the properties file for two bolts and click OK.
14. Repeat steps 8 to 13 for other rule sets.
Using rules and check together
You can use the connection check result when applying AutoDefaults with iteration. If a rule matches, but connection do not pass the check and symbol remains red, AutoDefaults continues
The iteration rule forces Tekla Structures to tests sub rules until the connection symbol is green in the model.
1. Open the connection properties dialog box.
2. Load the <Defaults> properties.
3. Click General tab and set AutoDefaults Rule Group to the "Iteration example" you created.
4. Click Design type tab and set Connection check to Yes.
5. Enter the load from secondary members in the fields Shear, Tension, Moment. 6. Click OK to create the connection.
Checking To see which rules AutoDefaults used, right-click the connection symbol, and select Inquire. To see which values AutoDefaults set, double-click the connection symbol to open the connection dialog box, select <AutoDefaults>, then click Load.
Reaction forces and UDL
You can save reaction forces:
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In the user-defined attributes of a part (for AutoConnection and AutoDefaults).•
On the Design tab in the connection dialog box (for AutoDefaults).Using reaction forces
When you use reaction forces in a rule and AutoDefaults is activate, Tekla Structures first searches for reaction forces in the corresponding connection’s properties. If they do not contain reaction forces, Tekla Structures searches the user-defined attributes of the secondary part of the connection. If Tekla Structures finds no forces there, you cannot use reaction force rules.
Shear force calculation
Shear force calculation is the exception. If you have not given any reaction force values, shear force is calculated using the UDL shear force routine. The UDL calculation is based on the AISC ASD Specification and is mainly intended for use with imperial units. It uses the yield stress value, profile dimensions, and UDL percentage to calculate the maximum allowable shear force.
Tekla Structures compares the result with the Shear force rule in AutoDefaults.
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Yield stress is defined in the material catalog.•
Profile dimensions come from the profile catalog.•
UDL percentage is taken either from the connection dialog box or from a variable.UDL for
AutoConnection
To switch on UDL calculation for AutoConnection:
1. On the Design tab in the connection dialog box, set the field Use UDL to Yes.
2. Enter the UDL percentage in the UDL % field. If this field is blank, Tekla Structures uses a default percentage (set using the variable XS_AUTODEFAULT_UDL_PERCENT).
UDL for AutoDefaults
To switch on UDL calculation for AutoDefaults:
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Set the variable XS_AUTOCONNECTION_USE_UDL to TRUE.•
Use the variable XS_AUTODEFAULT_UDL_PERCENT to set the UDL percentage.6 CNC
Introduction CNC (Computer Numerical Control) refers to the operation of a machine tool via motors, switches, and so on, with a computer controlling the manufacturing process. During the manufacturing process a machine tool or machining center cuts or shapes the piece of material.
In this chapter This chapter describes how to export CNC data from Tekla Structures models for use by machine tools. We explain how to export the data in different formats, such as DSTV, Peddimat, and DXF. We describe how to generate pop-marks in NC files. Pop marks are small holes that help the shop assemble individual parts to form an assembly. Then we explain how to generate hard stamps in NC files. Hard stamps are text marks that can contain various kind of information about parts. Finally we explain the plate nesting procedure.
Contents This chapter is divided into the following sections: