homogeneous concrete structure

[Anonymous]

Hi everyone!

 I'm a new user of Revit's environment. I have a simple question to ask you. I'm modeling a simple concrete structure but I have noticed that the "beam to column" connection doesn't create an homogeneous face. There are some lines between the elements.

The structure is created by the Grid tool (red circles in the image). Instead, If I copy and paste the column the problem doesn't appear (green circles)

Where is the problem?

I attach below an image for a better explaining.

Thank you!

[syman2000]

Can you check and see if those column and beam have the same material. Usually if they aren't the same, you will see lines.

[barthbradley]

Doesn't look like the surfaces are perfectly aligned. Try Aligning them in that 3D view you are in. 

[Anonymous]

The materials are the same and the alignment is correctly made (I suppose)

I attach below more images

[barthbradley]

Are the Cutbacks zeroed out? 

[Anonymous]

Yes, it is.

The strange fact is that when I copy and paste each column the problem doesn't show off. 

[barthbradley]

.

[martijn_pater]

Join geometry and/or check alignment.