Soffits are a deprecated structure type. They have been replaced by the new Attachment Point structure. Please see: How to Create a Soffit Structure.
The steps below will guide you through adding a legacy Soffit structure.
Step 1: Place a marker
Place a circle to act as a marker for the position you would like to place the structure.
Step 2: Left click the 'Structures: Place' button
You may need to left click & hold on the 'Structures' button to reveal additional buttons.
Step 3: Left click the marker
This should be the marker you placed in Step 1.
Step 4: Right click
This will allow placement of a Soffit structure.
Step 5: Left click the Left Rail
This should be the leftmost rail of the tracks you wish the structure to be associated with when looking in the direction of increasing chainage.
Step 6: Left click the Right Rail
This should be the rightmost rail of the tracks you wish the structure to be associated with when looking in the direction of increasing chainage.
Step 7: Select 'Soffit' Structure Type
The following 'Create Structure' form will now appear. From the 'Type' drop-down menu, select 'Soffit'.
Step 8: Enter 'Structure Details'
Complete the 'Structure Details' section with a name and the chainage the structure should be located at.
Name: Identifier for the structure
Chainage: Chainage value the structure should be placed at in kilometres
Step 9: Select Soffit Style
After selecting 'Soffit' the layout of the form will update to the one shown below. From the drop-down menu, select the style you would like to allocate.
Step 10: Configure Soffit
Adjust values for the Height, Length, Bearing and RECOS.
Height: Height of the Soffit in metres (Determined from height of the tunnel roof above sea level)
Length: Length of the tube in metres
Bearing: Rotation of the Soffit in degrees measured from North (0°)
RECOS: Distance from the centre of steel to the running edge of the closest rail in metres
Step 11: Left click 'Confirm'
This will close the 'Create Structure' form.
Step 12: Confirm the Structure has been placed correctly
You can now check that Lineardraft has placed a structure, which will be visible in both the 3D and Plan views.