Base Parts Destroying Vehicles While Building

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Working on a hangar of sorts.  It is large enough for my Mohawk to call home.  It is big.  My doors are three stories high and six wide.  During a trial fit, two stories weren't enough to get the tail in.  So I'm closing up shop for the night.  I made sure to park far enough forward to get the doors closed.  As I'm installing the doors, one of them must have gotten too close to the tail as I rotated it into position and my Mohawk instantly explodes.

Same kind of thing happened to my truck.  I'm trying to place some stairs as difficult as that is at times.  Get it to where I think it needs to be , press 6 to pause it, nope not close enough, press 6 to release it and they drop all the way down to the story below and blow up my pickup truck.  

Can base parts be made as pass through until a second after they are placed?  Kind of like when physics are applied?  To pause a second and then become a solid object?