Why can't I create a rabbet on the last interior face of this box lid?

SketchUp
1

I’m sketching a hamster cage to build out of plywood. The top is 3/4" ply with a cutout for a lid, which I created by drawing a rectangle and using push/pull to remove from the component. I then added a 3/8" high 1/2" rabbet around the cutout by drawing a rectangle on each interior surface and pulling it out 1/2". This worked perfectly for 3 of the 4 sides, but on the last side, drawing the rectangle even with the proper geometry (29 1/2" x 3/8") immediately creates a surface that fills in the entire cutout. Its driving me batty, I can’t figure out why. It doesn’t matter if I select the face or not. Its easy to see what I’m talking about in the attached skb file. Any advice? Thanks in advance!!

cage top.skp (49.1 KB)

2

Draw an edge between the two rabbets you have, no need to draw a rectangle. It will create a face across the opening. Just pick on the face and delete it. The edge is still there. Push pull the appropriate face. If that doesn’t work. IDK. Worked for me.

3

You might find it easier to use a different approach to modeling this. I see parallels in the way I would cut this opening in the shop.

opening
opening1053×710 432 KB

4

Thanks, I got it working finally!