Introduction
Every drawing file has a pair of invisible, default reference planes.
Think of the default reference planes as two horizontal planes (one upper plane and one lower plane) that stretch to infinity.
By default, the elevation of these default reference planes is set as follows:
• Lower reference plane: 0.000 m
• Upper reference plane: 2.500 m
Fehler! Es ist nicht möglich, durch die Bearbeitung von Feldfunktionen Objekte zu erstellen.
You can define the height of architectural elements by entering values for the top and bottom levels relative to these default reference planes. The height of all the architectural elements which are set relative to these planes can be modified in an easy and comfortable manner: all you need to do is change the elevation of the default reference planes and all the components associated with them will be updated automatically.
The advantage of this method is that all architectural elements can be lengthened or shortened in a single operation by changing the elevation of the planes. For example, if you wish to change the story height, you do not need to modify the height of every individual component. Rather, change the height of the planes in the drawing files containing the components of the story whose height you wish to change.
You can define the height of the default reference planes by using the Default Planes function in the Architecture flyout.
You can set up the height of an architectural element relative to the default reference planes when you enter the element. Of course, you can also modify these settings at a later stage. You can define the top and bottom level of an architectural element so that it is flush with the default reference planes or you can also enter an offset between
102 Task 5: Height Setup and Component Heights Allplan 2005
the top level and/or bottom level of the architectural element to the upper and/or lower reference planes.
Upper default reference plane
Lower default reference plane
TL relative to upper plane,
offset –1.275 m BL relative to lower plane,
offset 0.00 m
TL relative to lower plane,
offset 3.00 m BL relative to lower plane,
offset 0.50 m
TL relative to upper plane,
offset 0.5 m BL relative to lower plane,
offset –0.75 m
Overview
This requires the following tools:
Function Access
Open on a project-specific basis Standard toolbar
3 Viewports Window menu
Default Planes Roofs and Planes flyout Change Archit. Properties 3D Modification flyout Filter archit. elements Filter Assistant toolbar
Solution
The top of the finished floor is +/- 0.00 m. All the other height settings are based on this value. The slab is 18 cm thick and the thickness of the floor covering is 15 cm.
The story height is 2.75 m and the top and bottom levels of the walls are associated with the upper and lower reference planes so that they are flush. Based on this information, the height can be defined as follows:
Fit for CAD Basics Unit 2, Exercise 1: Floor Plan, First Floor 103
• Lower reference plane: 0.000 m – 0.150 m = – 0.150 m
• Upper reference plane: 2.750 m – 0.150 m – 0.180 m = 2.420 m
To define the height of the first floor
Drawing file setting: 1000 current, 100 open in edit mode 1 Open drawing files 1001 - 1005 in edit mode.
2 Switch to 3 Viewports (Window menu).
3 Click Default Planes (Roofs and Planes flyout).
4 In the Default Planes dialog box, set the Input method to Modify entries with the same height together.
104 Task 5: Height Setup and Component Heights Allplan 2005
5 Change the height of the lower default reference plane for one drawing file.
To do this, click the box below Default lower plane, enter –0.150 m and press ENTER to confirm.
The new height of the lower default reference plane is automatically applied to all the other drawing files.
6 Change the height of the upper default reference plane in the same manner to 2.420 m.
Fit for CAD Basics Unit 2, Exercise 1: Floor Plan, First Floor 105
7 Click OK to confirm the dialog box.
You can see how the height changes in isometric and elevation view.
8 Close drawing files 1001 to 1005 again.
106 Task 5: Height Setup and Component Heights Allplan 2005
The bottom of the glass wall is associated with the lower reference plane so that it is flush. In other words, it is 15 cm lower than the top of the finished floor and thus 15 cm below the floor covering.
But as the bottom of the glass wall is to rest on the finished floor, the height association needs to be redefined.
To correct the height setup for the bottom of the glass wall
Drawing file setting: 1000 current, 100 open in edit mode 1 Click Change Archit. Properties (3D Modification flyout).
2 Define properties or select elements
In the Change Archit. Properties dialog box, check the Height box.
3 Enable the Modify bottom level check box in the Height dialog box.
4 Check that BL relative to lower plane is active and enter 0.150 m.
5 Click OK to confirm the Height dialog box.
6 Define properties or select elements Select the two parts of the glass wall.
7 Click Apply and then Close to quit the tool.
Fit for CAD Basics Unit 2, Exercise 1: Floor Plan, First Floor 107
As the slab above the first floor (d = 18 cm) is to rest on the inner tier of the exterior wall whereas plaster, column and chimney are to be flush with the top of the slab above the first floor, the height setup relative to the upper reference plane needs to be changed for these elements.
To correct the height setup for the top of the coat of plaster applied to the exterior wall
Drawing file setting: 1000 current, 100 open in edit mode 1 Double click the top right exterior wall with the left mouse
button.
2 On the Parameters, Attributes tab in the All layers same settings area, remove the check mark beside Height.
3 In the column of the first line (= layer 1, coat of plaster), click .
4 In the Height dialog box, enter 0.180 m for the height of the Top level ( TL relative to upper plane is active) and click OK twice to confirm.
108 Task 5: Height Setup and Component Heights Allplan 2005
5 Click Change Archit. Properties (3D Modification flyout).
6 Define properties or select elements
In the Change Archit. Properties dialog box, click Match and then the modified coat of plaster applied to the exterior wall.
The parameters are transferred to the Change Archit. Properties dialog box.
7 Click Filter archit. elements (Filter Assistant toolbar).
8 Component, thickness or material to filter
In the Architecture Filter dialog box, select Wall in the Component area, choose 0.080 in the Wall thickness area and click OK to confirm the dialog box.
9 Define properties or select elements <Wall 0.080>
Select the exterior wall in its entirety – with the exception of the two wall sections toward the terrace.
Check that only the coat of plaster is displayed in the selection color.
10 Click Apply and then Close to quit the tool.
To correct the height setup for the top of the column and chimney
Drawing file setting: 1000 current, 100 open in edit mode 1 Double click the column with the left mouse button.
2 Click Setup beside Relative height. The Height dialog box is displayed.
Set the height of the Top level to 0.180 m ( TL relative to upper plane needs to be active).
3 Click OK twice to confirm.
4 Change the height setup for the top of the chimney in the same manner.
Fit for CAD Basics Unit 2, Exercise 1: Floor Plan, First Floor 109
Now the coat of plaster, column and chimney are 18 cm higher than the interior walls and the load-bearing tier of the exterior wall. Only the height of the coat of plaster of the wall toward the terrace will remain unchanged, as the slab, which will be applied later, will also cover the outline of the terrace.
The bottom of the glass wall toward the terrace is now 15 cm above the top of the unfinished floor. This is clearly visible when you view your design from the inside: