I’ve already written this twice. You need to resize the drawing window to fit the shape of the model. You clearly aren’t doing that.
Here’s a PDF created in LayOut. I set it up to print the model on two A4 sheets in Portrait orientation. The scale is set to 1/16" = 1’-0" That’s 1:192 not the 1:16 that you have been trying to use.
Gregory House.pdf (547.4 KB)
The setup is easy enough. Send the file to LayOut. Select the A4 portrait paper template.
With the viewport selected, go to the SketchUp Model window and select the scale.
Drag the edges of the viewport if needed to show the entire model. In order to spread it across two sheets, orient it as shown below.
Go to the Pages menu and click Duplicate. Then, with the viewport selected, Hold Shift and the left cursor (arrow) key to shift the viewport over like this:
If you were printing this on a single sheet the setup would be quicker but either way, this is much more predictable than printing it in SketchUp.
I mean that you need to change the size of the SketchUp window on screen. Look at the first screen shot I posted in my reply after getting your model. The entire SketchUp screen, window, user interface was resized so that the drawing window is close to the same proportions as the model.