Plan and Profile

Is there a way that somebody knows how to do the trenching with linear or segment that each segment could have a start and stop rim and FL so we don't have to do a new takeoff for every lentgh of pipe and still have it calculate the trench volume if i could collaborate and share ideas to see if we could come up with a work around.

Some of the depths are deeper in the middle of the run so we cant just use a simple slope