Parameters of DT Placement

You define the parameters of DT placement on several tabs in the palette. Alternatively, you can interactively define the lowering by using the handles at the placement points. In addition, you can use the other handles to define mandatory joints at the placing points, split and merge the placing regions, and select a placing region. You can also select a double-tee beam for displaying and interactively modifying the stem offsets. If columns have been cut out, you can select the required double-tee beam by using handles at the corners of the cut-outs.

Geometry tab

Enter reference plane

Plane

Click the Reference plane button to open the Relative height dialog box, where you define the top level of the double-tee beams in relation to a plane or as an absolute value. You can see the defined offset to the plane or the absolute height in the box.

Placing line 1/2

Points

You can use these buttons to edit the points of the placing line.

New entry: Use this to re-create all points of the placing line.
Insert point: Use this to insert an additional point into the placing line. First select a segment between two existing points of the placing line.
Delete point: Use this to delete a point from the placing line. This is only possible if there are more than two points.
Move point: Use this to modify the position of an existing point of the placing line.

Projection

Specify the value by which the double-tee beams end in relation to the placing line. The value applies to the corresponding segment between two points of the placing line. Based on the direction of the placing line you defined by entering the points, positive values result in a projection to the left of the placing line; negative values result in a projection to the right.

Tip: You can also specify the projection when you define the placing line. After you have placed the first point, enter the offset in the dialog line.

Lowering

Enter the height difference of the point of the placing line in relation to the height of the placement. To create a lowering, you must enter negative values.

Tip: You can also define the lowering interactively by using the point handles at the placement points. To exactly define a lowering, you must enter a negative value in the box for the length.

Joint

Specify whether you want to create a mandatory joint at a selected point of the placing line. If this point is within a double-tee beam, the program starts at this point to place the following double-tee beams. To adjust the width of the overlapping double-tee beams, you might have to split the placing regions. If the placement ends before the last point of the placing line and you select the Joint option, the program adds another double-tee beam.

Tip: You can also place and remove the joints by clicking the geometry handles at the placement points.

Span direction

New entry

If the two placing lines are parallel, the span direction is automatically perpendicular to the placing lines. To define any span direction, click the Start button and then click two points or a line.

Placement tab

Mark number of double-tee beam

Define the mark number with which you want to start and the additional text. The program proposes the mark number following the greatest mark number that is already assigned.

Allplan assigns the mark numbers in ascending order. Double-tee beams that are geometrically identical get the same mark number across placements. If the mark number with which to start is smaller than or equal to the greatest mark number, Allplan uses the mark number following the greatest mark number.

Double-tee beam

Profile name

Select a predefined profile of the double-tee beams from the list box. With the User defined entry, you can define a custom profile with the dimensions specified.

Joint width

Define the width of the joint between the individual double-tee beams. Allplan applies half the joint width to the beginning and end of the placement.

Length tolerance

Define the length tolerance for calculating the element lengths of the double-tee beams. The actual length will be rounded off to a multiple of this value. Elements with slight differences in the actual length, which result from lowering the placement points, can be combined into elements with a common mark number.

Modify geometry

Specify whether to cut double-tee beams across their width. First define the beam up to which the following definition is to apply. If the number is smaller than the total number of double-tee beams in the placement, you can see an additional line with the ascending region index.

Tip: You can also split the placing regions by clicking the move handles at the joints. If you want to merge the placing regions split, click the move handle turned 45 degrees.

In the Cut area, specify whether you want to create uncut double-tee beams (Standard setting) or whether you want to cut the double-tee beams across their width on the left, right, or on both sides. Enter the width of the cut double-tee beams.

When you select the Adjust on the left, Adjust on the right, or Adjust on both sides setting, ALLPLAN tries to automatically define the width so that double-tee beams fill the placing region completely. If you want that the width calculated does not change when you make modifications later, select the Left, Right, or On both sides setting.

You can use the and buttons to switch between several regions. Thus, you can define a different profile for the current region index.

Tip: You can also select the regions individually by clicking the special handles in the placements.

Washer tab

Washer

Define the height and width of a washer. You need to define the width for each side of the placement. ALLPLAN applies the height to the edge of the placement. Starting from there, the height goes down to zero across the width entered.

Fixtures tab

Edge connection

By selecting the path, file, and entry, you define the fixture that will be created at the start or end of the placement along the longitudinal side of the double-tee beams if the Edge fixture on the left or Edge fixture on the right option is selected.

To place the fixtures, enter the distance between the fixtures in the longitudinal direction of the double-tee beams and the distance from the top of the double-tee beams. For the minimum distance to the start, ALLPLAN uses the value defined in the Joint connection area.

Joint connection

By selecting the path, file, and entry, you define the fixture that will be created to connect the double-tee beams when you select the Add fixture option. In addition, ALLPLAN also creates the fixture at the start or end of the placement if the Edge fixture on the left or Edge fixture on the right option is not selected in the Edge connection area.

To place the fixtures, enter the distance between the fixtures in the longitudinal direction of the double-tee beams and the distance from the top of the double-tee beams. You also define the minimum distance to the start of the placement. ALLPLAN also applies this value to the fixtures at the edges, which might be different.

Lifting bolts

By selecting the path, file, and entry, you define the fixture that will be created to transport and assemble the double-tee beams when you select the Add fixture option. ALLPLAN always creates the lifting bolts in the stems.

To create the four lifting bolts, enter the distance from the start and end of the upper slab.

Bearing beam

By selecting the path, file, and entry, you define the fixture that will be created to support the double-tee beams when you select the At line 1 or At line 2 option. Depending on the option selected, ALLPLAN applies this fixture to the undersides of the stem ends at placing line 1 or 2.

To place the fixtures, enter the distance between the fixtures and the stem ends.

Chord

When you select the At line 1 or At line 2 option, ALLPLAN creates a hard-coded fixture in the upper slab at placing line 1 or 2. You cannot change this fixture, but it automatically adapts to the width of the double-tee beam.

Use Distance from edge and Distance from top to define the middle of the fixture relative to the top level of the upper slab.

Regions without fixtures

Click the Add polygon button to define any polygonal area where you do not want to create fixtures. If you have defined several regions, you can use the drop-down menu to select the active region.

You can edit the active region as follows.

Delete polygon: Use this to delete the entire region.
New entry: Use this to re-create all boundary points of the region.
Insert point: Use this to add an additional boundary point to the region. First select a segment between two existing points of the region.
Delete point: Use this to delete a boundary point from the region. This is only possible if there are more than three points.
Move point: Use this to modify the position of an existing boundary point of the region.

Stem offset tab

Global values

Offset at line 1/2
Joint

Define the value by which you want to shorten or lengthen all stems within a placement in relation to the upper slab. ALLPLAN applies the value to the stem ends at placing lines 1 and 2. Positive values shorten the stems; negative values lengthen the stems. ALLPLAN considers the joint only when shortening the stems.

Dap ...

Define the dimensions of a dap that will be created at all stems within the placement. The length applies to the end of the stem; the height to the bottom level of the stem. The chamfer applies both horizontally and perpendicularly to the point where the length and width intersect. When you enter a positive value for the offset, ALLPLAN lengthens the dap by this value on the underside of the stem, thus chamfering the perpendicular surface of the dap.

Direct offset input

Select this option to show boxes for the current double-tee beam in the placement. You can use these boxes to directly enter the values by which you want to shorten or lengthen the stems. Note that you need to enter negative values if you want to lengthen the stems.

Double-tee number

Use the and buttons to individually select the double-tee beams of the placement and define different values for the stem offsets and daps of the four stem ends in the following regions.

Tip: You can also select the double-tee beams individually by clicking the geometry handles in the placements. Then, you can interactively define the shortening or lengthening of the stems by using the point handles at the stem ends.

Offset 1 - 4

Offset
Dap ...

Define different values for the stem offset and dap of the double-tee beams selected in Double-tee number. You can see the number of the stem end in the placement. When you select the required check box, ALLPLAN locks the value. Consequently, it remains unchanged when you enter a value in the Global values area.

Recesses tab

Joints at columns

Joint width

Define the width of the joint that generally applies to the recesses of the columns at the corners of the double-tee beams.

Double-tee number
Joint 1 - 4

Use the and buttons to individually select the double-tee beams of the placement and define different values for the joint widths in the following boxes. You can see only boxes for the corners that are actually cut out. When you select the required check box, ALLPLAN locks the value. Consequently, it remains unchanged when you enter a global value for the Joint width.

Tip: You can also select the double-tee beams individually by clicking the geometry handles at the columns.

Recesses

Click the Add polygon button to define any polygonal recess. If you have defined several recesses, you can use the drop-down menu to select the active recess.

You can edit the active recess as follows.

Delete polygon: Use this to delete the entire recess.
New entry: Use this to re-create all boundary points of the recess.
Insert point: Use this to add an additional boundary point to the recess. First select a segment between two existing points of the recess.
Delete point: Use this to delete a boundary point from the recess. This is only possible if there are more than three points.
Move point: Use this to modify the position of an existing boundary point of the recess.
Joint width: Use this to define the width of the joint around the recess.

Buttons in the border of the palette

You can find the following tools in the lower border of the palette:

Load favorite: Use this to select and load a favorite file (*.pyv) that contains the parameters of a DT placement.
Save as a favorite: Use this to save all parameters of the current DT placement as a favorite (*.pyv).
Restore basic settings Use this to restore the default settings.