This subassembly creates a ditch structure with optional bench and backslopes on the inside and the outside of the structure.
Attachment
The attachment point is the innermost point of the optional inside bench. If inside benches are omitted, the attachment point is on the innermost point of the inside wall of the ditch structure.
Input Parameters
Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1), unless indicated as a percent slope with a “%” sign.
| Parameter | Description | Type | Default |
|---|---|---|---|
| Side |
Specifes to insert the subassembly either on the right or the left side of the attachment point. |
Left / Right | Right |
| Bottom Width | Bottom width of the ditch | Numeric, Positive |
2.0 ft 0.6 m |
| Ditch Depth | Depth of the ditch | Numeric, Positive |
2.0 ft 0.6 m |
| A1 | Thickness of the inside wall at the top | Numeric, Positive |
0.45 ft 0.15m |
| B1 | Increased wall thickness of the inside wall at the bottom | Numeric, Positive |
0.6 ft 0.2m |
| C | Thickness of ditch bottom lining | Numeric, Positive |
0.5 ft 0.15 m |
| D | Depth of the tapered face on the inside wall | Numeric, Positive |
2.0 ft 0.6 m |
| E1 | Depth of the hinge point where the start of inside bench/backslope links is located | Numeric, Positive |
0.0 ft 0.0 m |
| Inside Bench Width | Width of the (optional) inside bench. Enter ZERO for no bench | Numeric, positive |
1.5 ft 0.5 m |
| Inside Bench Grade | Cross grade of the (optional) inside bench. It is measured away from the ditch structure edge, and a positive slope indicates rising bench from the ditch | Numeric, Grade type | 4% |
| F1 | Inside backslope link (optional) width. Enter ZERO value for no backslope link | Numeric, Positive |
1.0 ft 0.3 m |
| G1 | Slope of the (optional) inside backslope link. It is measured away from the ditch structure, and a positive slope indicates rising link from the start point | Numeric, Slope type | 1:1 |
| A2 | Thickness of the inside wall at the top | Numeric, Positive |
0.45 ft 0.15 m |
| B2 | Tapered width of the outside wall | Numeric, Positive |
0.6 ft 0.2 m |
| E2 | Depth of the hinge point for the start of outside bench/backslope links | Numeric, Positive |
1.0 ft 0.3 m |
| Outside Bench Width | Width of the (optional) outside bench. Enter ZERO for no bench | Numeric, positive |
3.0 ft 1.0 m |
| Outside Bench Grade | Cross grade of the (optional) outside bench. It is measured away from the ditch structure edge, and a positive slope indicates rising bench from the ditch | Numeric, Grade type | 4% |
| F2 | Outside backslope link (optional) width. Enter ZERO value for no backslope link | Numeric, Positive |
1.0 ft 0.3 m |
| G2 | Slope of the (optional) outside backslope link. It is measured away from the ditch structure, and a positive slope indicates rising link from the start point | Numeric, Slope type | 1:1 |
Target Parameters
This section lists the parameters in this subassembly that can be mapped to one or more target objects, such as a surface, alignment, or profile object in a drawing. For more information, see To Specify Corridor Targets.
Target Parameters: None.
Output Parameters
Behavior
The subassembly builds the shape for a ditch structure, as shown in the illustration. To omit benching and foreslope links, enter zero for the appropriate width parameters.
Layout Mode Operation
In layout mode, this subassembly draws as it is defined using the input parameters, starting from the attachment point.
Point, Link, and Shape Codes
The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.
| Point/Link | Codes | Description |
|---|---|---|
| P10 | Ditch_In | |
| P1, P6 | Ditch_Back | |
| P2, P5 | Ditch_Face | |
| P14 | Ditch_Out | |
| L10, L13 | Top | |
| L10, L13 | Datum | If the offsets of P11 is < P8; and P13 is > P9 respectively |
| L11 | Top | |
| L12 | Top | |
| L1 and L5 | Top | |
| L1 to L5 | Ditch_Top | |
| L8 and L9 | Datum | |
| L10, to L13 | Backfill | |
| L6 | Backfill_Face | |
| S1 | Ditch | Ditch structure shape area |
Coding Diagram
