Corridor Catch Point Staking

Corridor Catch Point Staking is similar to the standard Side Slope Catch Point workflow, but the cut and fill tie slopes are defined directly within the corridor model. Siteworks automatically identifies and displays the available tie slopes for the selected station.

Typical applications include:

• Road embankments
• Highway cut and fill batters
• Drainage channels
• Dam embankments
• Earthworks tie-ins
• Daylight line staking

A corridor may contain multiple tie slopes. For example:

• A standard road corridor typically has a left and right tie slope.
• A divided highway may contain four tie slopes, one on each side of the separate carriageways.

Start Corridor Catch Point Staking

1. From the Measurement screen, select Home > Stake.
2. Select the required corridor or alignment:
   • Choose it from the Alignment tab, or
   • Tap and hold the corridor on the map and select it.
3. In the Stake Method field, select Catch Point.
4. Tap ACCEPT.

Select a Station

1. Enter a station manually, or
2. Select a station from the map.

If tie slopes exist at that station, Siteworks displays the corridor cross-section.

If no tie slopes exist at that station, you can:

• Extend the outer corridor segments and use them as tie slopes.
• Define a custom tie slope.
• Select another station where tie slopes are available.

Select the Tie Slope

The corridor cross-section displays all available tie slopes.

To select a tie slope:

• Tap directly on the tie slope in the cross-section, or
• Use the navigation arrows to cycle through available tie slopes.

Colour coding is used to identify the slope type:

• Red = Cut slope
• Blue = Fill slope

The active tie slope is highlighted.

Modify the Tie Slope

During staking you can modify the corridor tie slope without changing the original design.

For example, if the design specifies a 1:3 cut slope but site conditions require a 1:2.5 slope, you can temporarily redefine the slope for catch point calculations.

Available options include:

After entering a custom slope, select the corridor node from which the slope should be projected.

You can also apply a hinge point offset using the Stake icon within the catch point workflow.

Locate the Catch Point

1. Navigate to the required station using the Ahead/Backward values in the Info Bar.
2. Display the corridor cross-section.
3. Walk toward the selected tie slope.

Siteworks continuously:

• Extends the selected corridor surface.
• Projects the tie slope.
• Compares it against the existing ground surface.
• Calculates the current catch point location.

The catch point is dynamic and updates as terrain conditions change.

Use the Inward/Outward guidance values to locate the actual daylight point while monitoring your station location.

Record the Catch Point

Once you are close to the calculated catch point:

1. Tap Measure.

Siteworks generates a Stake Marker Report and calculates the appropriate catch point marking information.

Catch Point Marking Methods

Catch point staking supports several marking methods, configured under:

Home > Settings > Catch Point Marking

Available methods include:

Single Stake

Uses one stake to mark the catch point.

Dual Stake

Uses two stakes to define the catch point location.

Batter Rail

Uses a batter rail arrangement for more detailed earthworks control.

Siteworks guides you through the placement and marking of all required stakes, including cut/fill information and stake labels.

Fixed and Random Station Modes

Catch points can be staked using either:

Fixed Station Mode

Stake catch points at predefined station intervals along the corridor.

Random Station Mode

Stake catch points anywhere along the corridor based on your current perpendicular location relative to the alignment.

This is useful when terrain conditions require the daylight line to be located at irregular intervals.

Best Practice

When staking earthworks batters, regularly compare the projected catch point with the actual terrain and adjust staking intervals where the ground changes rapidly. This produces a more accurate daylight line and provides better guidance for construction crews forming cut and fill slopes.