Panel type catalog - prestressed hollow core element

Catalogs for precast concrete elements

"General" tab

Created on:

Date the record was created.

Last modified:

Date the record was last changed.

Name:

You can enter any name. You can find this name in the Type list box of the basic parameters for slab element design if the Description box is empty. Thus, you can enter a short name for the catalog and a detailed description for the design.

Description:

You can enter any name. You can find this name in the Type list box of the basic parameters for slab element design.

Panel thickness:

The standard value for panel thickness.

Max. panel length:

Maximum value for the panel length. If this value is exceeded during design, the program displays a message.

Longitudinal section / End face section:

Selection box of the joint section catalog. These sections are used for element design. All the edges to which you assign the longitudinal section get the Smooth edge or Stop position attribute.
To assign this attribute to a panel edge without profiling, you must define a "smooth" section in the joint section catalog and assign it here.

You can use the support conditions to modify the sections applied to the sides of the support. The sections at the joints can be modified by means of the Modify Parameters, Basic Reinforcement tool.
You can define how to display and label sections in the configurations.

Standard panel width:

The standard value for panel width. This value is used for uncut panels in element design.

Min. fitted panel width:

Minimum value for the panel width. If this value cannot be complied with, the program creates a strip made of in-situ concrete or two fitted panels (depending on your settings).

Max. fitted panel width:

Maximal value for the width of a cut panel. If this value is exceeded, the program creates two fitted panels.

Min. offset from cut to web at start or end:

Minimum value for the left or right distance from cuts in areas of hollow blocks to the web. The program uses this entry to calculate the widths of fitted panels and positions of openings.

Opt for cut in axis:

When generating fitted panels, the program tries to cut the panels in the area of the hollow block axis and to use permissible values for the support widths. If this results in an illegal panel, the program uses the minimum distances from the cuts to the webs.

Dead weight for simplified calculation:

When you enter a value that is not equal to 0.000 [to/m2], the program uses a simplified method to compute the weight, ignoring closed hollow blocks when computing the weight and volume of the precast element. In this case, the program computes the weight of the element by multiplying the weight of the panel area by the value for the dead weight specified here. To compute the volume, the program divides the computed weight by the Specific weight of reinforced concrete defined in the Concrete grade catalog.

"Recesses 1" tab

Recesses that are larger than the ones defined here can be created by means of steel headers. The program uses the recess width to define the number of webs that will be cut.

Small recess between two webs:

Maximum length of recesses which are not wider than the space available between two webs.

Medium-sized recesses:

Minimum edge offsets for recesses which are wider than small recesses; however, these recesses do not exceed the limits defined on the Recesses 1 and Recesses 2 tabs.

By defining these minimum offsets, you can prevent nonproducible or failure-prone panel webs from being generated because the program extends the recesses as far as the panel edge. However, the program considers these offsets only if it is not allowed to move the medium-sized recesses.
Thus, recesses at room edges, which result in narrow webs (due to the support) will not be treated as lateral or centered recesses. Rather, these recesses retain their positions.

Based on these minimum offsets, you can turn recesses in midspan into support recesses in the head region or into lateral recesses and vice versa.

Support recess at corner / head:

Maximum dimensions for recesses as shown in the illustration.

If it is not allowed to move the recess and if, in the case of recesses in the head region, the edge offset to the longitudinal side is smaller than the minimum offset specified for medium-sized recesses, the program creates a recess in the corner.

Note: You cannot apply the two recess options to one and the same panel!

Projecting panels in corner and head regions:

Maximum height:width ratio permitted for projecting panel parts in corner or head regions resulting from support recesses in head regions. The program checks each projecting part. These parts must always be at right angles and parallel to the span direction.

If a projecting part does not meet these criteria, the panel gets the identifier for the illegal geometry element state. You must then specify how to continue (for example, placing mandatory points, …).

"Recesses 2" tab

Recesses that are larger than the ones defined here can be created by means of steel headers. The program uses the recess width to define the number of webs that will be cut.

Recess in center of panel:

Maximum dimensions and minimum edge offset for recesses as shown in the illustration.

If the minimum edge offset is not complied with and it is allowed to move the recess, the program moves the recess to the specified offset during design.
If it is not allowed to move the recess and the edge offset to the front is larger than the minimum offset specified for medium-sized recesses on the Recesses 1 tab, the program displays a message during design.
If it is not allowed to move the recess and the edge offsets are smaller than the minimum values specified for medium-sized recesses on the Recesses 1 tab, the program creates a recess in the corner, head region, or lateral region.

Lateral recess:

Maximum dimensions and minimum edge offset for recesses as shown in the illustration.

If the minimum edge offset is not complied with and it is allowed to move the recess, the program moves the recess to the specified offset during design.
If it is not allowed to move the recess and the edge offset to the front is larger than the minimum offset specified for medium-sized recesses on the Recesses 1 tab, the program displays a message during design.
If it is not allowed to move the recess and the edge offset to the front is smaller than the minimum offset specified for medium-sized recesses on the Recesses 1 tab, the program creates a recess in the corner.

"Hollow blocks" tab

Number, type, and position of hollow blocks. You can define up to six areas.

Number:

Number of hollow blocks for the current area.

Type:

Selection box of the hollow block catalog.

x-offset, y-offset:

Axis spacing between hollow blocks and the panel edge or the axis of the last hollow block in the x-direction; edge offset from hollow blocks to the bottom panel edge in the y-direction for the current area.

"Mounting hooks, lifting bolts" tab

The mounting hooks, lifting bolts can be calculated using two different algorithms. You can either calculate the mounting hooks, lifting bolts solely by panel weight, or you can calculate them depending on the panel width and panel weight. The Calculation by dialog box is used for this purpose with the Weight and Gew+Bre (= Weight and width). The tab content will vary depending on the selection made.

• Enter the following values for the Weight setting:
  
  Position
  
  Position of mounting hooks and lifting bolts relative to the panel edges.
  The longitudinal sides are defined by the enclosing min-max box parallel to the span direction of the panel. The program thus calculates the longitudinal axes based on the offset from the panel edge of the longitudinal side in the transverse direction or on the hollow block number. The offset from panel edge of end face in span direction is measured from the point where the longitudinal axes intersect the front faces or diagonal cuts.
  
  Example of position of mounting hooks/lifting bolts
  
  Note: The number of rows depends on the element width.
  
  Anchor types:
  
  Type of mounting hook and lifting bolt. You can define different anchor types depending on the panel weight. You can use the File number and Entry boxes to access the entries in the Allplan fixture catalog.
• You can choose from the following settings for Gew+Bre
  
  Position:
  
  Position of lifting bolts relative to the panel edges of the end faces. The offset from panel edge of end face is measured from the point where the longitudinal axes intersect the front faces or diagonal cuts.
  
  Anchor types:
  
  Type of mounting hook and lifting bolt. You can define up to eight different anchor types depending on the panel width and weight.
  You can define the To panel width [mm], To panel weight [to], Hollow block 1, Hollow block 2 and Fixture parameters for each line. Please note the entries must be made in the corresponding boxes and not directly in the table
  
  All other parameters must always be entered for a complete line up to the Hollow block 2 parameter. Unlike the Weight setting, this option allows you to define only the parameters for Hollow block 1. Two anchors are then placed in the defined hollow block. Otherwise four anchors will always be created in both of the defined hollow blocks.
  
  The fixture is defined in the Selection of fixture dialog box. You can choose from the Office, Project or Private paths as well as the Manufacturer Catalog or Article Catalog paths for the fixture path. If you have selected one of the first three options, you can then select the file and the entry. For the two other Manufacturer Catalog or Article Catalog options, you need to select the required Catalog, Class, Subclass and the Article.
  
  You can add or delete lines in the table by using the three buttons above the boxes. Click to insert a new entry above the selected entry in the table. Click to add an entry to the end of the table. Click to delete the entry selected in the table. To change the existing settings for an entry, click the relevant entry and enter new values in the boxes.

"Insulation" tab

Type
Thickness / Material:

To apply insulation to the bottom side of the panel, enter the Thickness and select the required insulation material in the Material list box.

Note: If you cannot find the required insulation material, the thickness entered does not match the thickness for the required material in the insulation material catalog.
If the Define dimensions option is selected for the insulation material on the Placement tab, the program places insulating boards. Otherwise, the program creates one insulating board with the dimensions of the precast element.

End faces / Longitudinal sides

You can specify parameters for the concrete supports at the bottom side of the panel. You can make separate settings for end faces and longitudinal sides. The following variants are available: Not used, Concrete pads, and Concrete beams. Depending on the selected variant, you can define the following parameters:

• Concrete pads for end faces: Assign a Fixture and select the Entry mode by opening the list box and clicking Below each web or Below specific webs. When you select Below specific webs, enter the Web numbers below which you want to create concrete pads. Use commas to separate the individual numbers (for example, 2,8,14).
  You can use the Offset to edge box to enter the offset from the reference point of the selected fixture to the panel edge.
• Concrete pads for longitudinal sides: Assign a Fixture and select the Entry mode by opening the list box and clicking one of the options. When you select the From center of panel edge on both sides option, you define the Offset between the concrete pads and the Minimum offset. For the other two options, specify the First offset of the first concrete pad from the relevant corner. All offsets are based on the reference points of the selected fixtures.
  You can use the Offset to edge box to enter the offset from the reference point of the selected fixture to the panel edge.
• Concrete beams for end faces and longitudinal sides: All you need to do is assign a Fixture.
  You can use the Offset to edge box to enter the offset from the reference point of the selected fixture to the panel edge.

Note: The numbers you enter for File no. and Entry must be the same as those in the fixture catalog in Allplan.
The fixture you select for the Concrete pad must be a group fixture that consists of at least one linear fixture with the Interaction with precast element - Positive (merging) setting. This fixture defines the outline of the concrete pad in plan. The length of the defined linear component must be the same as the thickness defined for the appropriate insulating layer.
The fixture for the Concrete beam must be a linear fixture with the Interaction with precast element - Positive (merging) setting. This fixture defines the outline of the concrete pad in elevation.

"Bond" tab

End faces / Longitudinal sides

You can specify parameters for the recesses at the upper side of the panel. You can make separate settings for end faces and longitudinal sides. The following variants are available: Not used, Fixture, and Parameters. Depending on the selected variant, you can define the following parameters:

• Fixture for end faces: Assign a symbol Fixture and select the Entry mode by opening the list box and clicking In each hollow block or In specific hollow blocks. When you select In specific hollow blocks, enter the Hollow block numbers to indicate the hollow blocks where you want to create the recesses. Use commas to separate the numbers (for example, 2,8,14).
  You can use the Offset to edge box to enter the offset from the reference point of the selected fixture to the panel edge.
• Parameters for end faces: Specify the Length A and the Width B of the recess to be created. The other parameters are the same as those for the Fixture variant.
  
• Fixture for longitudinal sides: Assign a symbol Fixture and select the Entry mode by opening the list box and clicking one of the options. When you select the From center of panel edge on both sides option, you define the Offset between the recesses and the Minimum offset. For the other two options, specify the First offset of the first recess from the relevant corner. All offsets are based on the reference points of the selected fixtures.
  You can use the Offset to edge box to enter the offset from the reference point of the selected fixture to the panel edge.
• Parameters for longitudinal sides: Specify the Length A, Width B, Width C, Depth D, and the Chamber (hollow block) where you want to create the recess. The other parameters are the same as those for the Fixture variant. However, you cannot specify the Offset to edge.
  

Note: The numbers you enter for File no. and Entry must be the same as those in the fixture catalog in Allplan.

"->Fact." tab

Assignment of entries to factories.

The selected entry applies to the selected factories only. If no factory is selected, the entry applies to all factories.