pad grading question

[jim]

i have attached a screenshot. i created a large corridor w/ several regions. some of these on the perimeter have assemblies that have a 50 shoulder w/ daylight to multi intercept so my corridor surface TIN has roughly accounted for the townhouse pads. i was able to make the TIN behave on the regions where the assembly stopped at the back of curb with no shoulder or daylight (the NE corner of screen). when i try the same technique on the perimeter pads the TIN wont create a flat pad. when i cursor over the pad the elevation changes as is reflected on the corridor surface below. the cursor should show 915.16 as the pad elevation. i can see the TIN "looking at" the boundary of my corridor surface below. i would like to keep the daylight part of my surface an interject the building pads into the corridor surface. thanks for any advice!

[Civil3DReminders_com]

Based on the contours the lower left corner point is at a different elevation than the lot elevation just to the north, causing you to not have a flat pad.

[jim]

i think the problem is the TIN reading the corridor surface boundary. i made a grading surface from a feature line that identifies the correct grade. now...how do i tell the new grading surface to model with the corridor surface???