https://forums.autodesk.com/t5/civil-3d-forum/structure-height/m-p/6001546#M220683 <P>I can not input a structure height of less than 4'. I found on here to change the Model Parameters in the Parts Builder, which i did and it still won't allow anything less than 4'.&nbsp; I also adjusted the pipe rules for minimum cover and nothing. Can anyone see something in the Model Parameters I've set that isn't right and not allowing under 4?</P><P>thanks.</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 22 Jan 2016 15:50:53 GMT Anonymous 2016-01-22T15:50:53Z https://forums.autodesk.com/t5/civil-3d-forum/structure-height/m-p/6001546#M220683 <P>I can not input a structure height of less than 4'. I found on here to change the Model Parameters in the Parts Builder, which i did and it still won't allow anything less than 4'.&nbsp; I also adjusted the pipe rules for minimum cover and nothing. Can anyone see something in the Model Parameters I've set that isn't right and not allowing under 4?</P><P>thanks.</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 22 Jan 2016 15:50:53 GMT https://forums.autodesk.com/t5/civil-3d-forum/structure-height/m-p/6001546#M220683 Anonymous 2016-01-22T15:50:53Z https://forums.autodesk.com/t5/civil-3d-forum/structure-height/m-p/6001779#M220684 <P>Set your barrel clearance to List instead of Constant...</P> <P>&nbsp;</P> <P><IMG src="https://forums.autodesk.com/t5/image/serverpage/image-id/213180iC7A4328DF9D7DC25/image-size/original?v=mpbl-1&amp;px=-1" border="0" alt="1-22-2016 11-46-25 AM.png" title="1-22-2016 11-46-25 AM.png" /></P> Fri, 22 Jan 2016 17:44:40 GMT https://forums.autodesk.com/t5/civil-3d-forum/structure-height/m-p/6001779#M220684 Todd_Rogers 2016-01-22T17:44:40Z