gelbuilding

I have a roof to build with i beams and fill with timber. It has a raked ceiling and i need to work out the steel work. CA can handle the i beams in the structure though its very tedious in positioning the member exactly where they need to be. See attached dwg, The 3D view ok though in plan view the beams that on the hip run past the ridge, im baffled why this is in the plan view and not in the 3D view.. Any suggestions would be greatly appreciated.

Recently installed CAx6 and i don't understand why this error coming up all the time while i`m working.PITA. I deleted the data file. CA put it back in the same place and still have this error. My HD is C:/ weird why its saying cannot find, lol Any suggestion. My computer only six month old.

Just downloaded the viewer though cannot find it for my i pad. Any time soon will it be available for using it on an i pad.