Rules Tab (Pipe Rule Set Dialog Box)

Use this tab to view or edit the rules included in this set of pipe rules.

You can change values of existing rules, add rules, or delete rules. You can also change the order in which rules are processed by changing the order they appear on this dialog.

Note: Rules are not applied to pipes or structures when importing pipe networks from either LandXML or from the Storm Sewers Extension.

Add Rule

Click this button to display the Add Rule dialog box where you can select a new rule to add to this rule set.

Delete Rule

You can remove a rule from the rule set by selecting the rule on this dialog box and clicking this button.

Up and Down Arrow Buttons

You can change the order in which rules are processed by changing the order they appear on this dialog. Rules are processed sequentially, starting from the rule displaying at the bottom of this dialog box, and ending with the rule displayed at the top of this dialog box.

Cover And Gradient

This rule ensures that a pipe gradients appropriately and warns when a pipe is placed too close to a ground surface. For more information, see About the Cover And Slope Pipe Rule.

Maximum Cover: Specifies the maximum cover of soil over the length of the pipe, based on the surface being referenced by that pipe. If the maximum cover is exceeded, a rule violation occurs. Note that this parameter provides validation only; it does not alter (move or resize) the part in the drawing in any way. It simply produces a rule violation on the part if the specified value is exceeded.
Maximum Gradient: Specifies the maximum gradient of the pipe, expressed in percent. If the pipe gradient is greater than the maximum, a rule violation occurs for that object.
Minimum Cover: Specifies the minimum cover of soil over the pipe, based on the surface being referenced by that pipe. During layout, a pipe will be created that attempts to maintain the minimum cover. This is also used to determine the initial levels of the pipe. If the pipe is edited so that its cover is less than the minimum cover value, a rule violation occurs for that object.
Minimum Gradient: Specifies the minimum gradient of the pipe, expressed in percent. During layout, a pipe will be created according to its minimum gradient rule value. If the pipe is edited so that its gradient is less than the minimum, you can still edit the pipe as desired, breaking the minimum gradient rule, but a rule violation occurs for that object.

Cover Only

This rule is intended for laying out pipes in a pressure-based pipe network where pipe levels are determined according to a specified depth below a terrain. This rule ensures that the minimum cover is met along the length of the pipe, and also validates that both the minimum and maximum cover values are not violated along any length of the pipe. For more information, see About the Cover Only Pipe Rule.

Maximum Cover: This is the maximum cover of soil over the pipe, based on the surface being referenced by that pipe. If the pipe cover exceeds the maximum cover value, a rule violation occurs for that object. Note that this parameter provides validation only; it does not alter (move or resize) the part in the drawing in any way. It simply produces a rule violation on the part if the specified value is exceeded.
Minimum Cover: This rule represents the minimum cover of soil over the pipe, based on the surface being referenced by that pipe. During layout, a pipe will be created that attempts to maintain the minimum cover. If the pipe is edited so that its cover is less than the minimum cover value, a rule violation occurs for that object.

Length Check

This rule governs the behavior that produces a warning condition on a pipe if the pipe length exceeds the value specified for the maximum pipe length, or is less than the value specified for the minimum pipe length. For more information, see About the Length Check Pipe Rule.

Maximum Length: Specifies a maximum length for pipes. When this rule is in use, you can still draw pipes that exceed the defined maximum pipe length. However, the object will be displayed with a warning icon in the Prospector list view. Note that this parameter provides validation only; it does not alter (move or resize) the part in the drawing in any way. It simply produces a rule violation on the part if the specified value is exceeded.
Minimum Length: Specifies a minimum length for pipes. When this rule is in use, you can still draw pipes that are shorter than the defined minimum pipe length. However, the object will be displayed with a warning icon in the Prospector list view. Note that this parameter provides validation only; it does not alter (move or resize) the part in the drawing in any way. It simply produces a rule violation on the part if the specified value is not met.

Pipe To Pipe Match

This rule governs how a pipe level is determined in a pipe network that contains only pipes (no structures), and or when a pipe is inserted onto an existing pipe to break the pipe. For more information, see About the Pipe To Pipe Match Rule.

Match Location: This parameter controls whether the inserted pipe holds to the pipe’s invert, soffit, or centerline level (location).
Drop Value: The drop value on a structure can determine a pipe’s depth.

Set Pipe End Location

This rule allows you to set the start and end locations of the pipes to be at the structure center or at an offset relative to the structure's inner or outer wall. For more information, see About the Set Pipe End Location Rule.

End Location: Specifies that the end of the pipe be located relative to the Structure Center, Structure Inner Wall, or Structure Outer Wall. Without the rule, the end of the pipe will be located at the Structure Center.
Start Location: Specifies that the start of the pipe be located relative to the Structure Center, Structure Inner Wall, or Structure Outer Wall. Without the rule, the start of the pipe will be located at the Structure Center.
End Offset: Specifies an offset distance from the specified End Location toward the center of the ending structure. This offset is not applied when the End Location specified is Structure Center. Negative values and values that would extend the pipe further than the structure center are ignored.
Start Offset: Specifies an offset distance from the specified Start Location toward the center of the starting structure. This offset is not applied when the Start Location specified is Structure Center. Negative values and values that would extend the pipe further than the structure center are ignored.