Angles

The angles on my portfolio stand have proven to be an area for investigation, due to difficulties had. Whilst the angle I estimated in my original design sketch, where the portfolios will be displayed, seemed to be correct and effective by my first card model, the angles where the 2 sections crossover have been problematic.

The space where the portfolio is placed is a 70 degree angle. At the point of 35 degrees, he middle points directly upwards form the center of the stand. Now my first attempt at working out the angles of the center crossover was with a scale drawing. The original intention of the drawing was:
1)To give me a more accurate diagram of how the product/stand would look.
2)  So could work out the length of the 2 sections, as the desired height was 80cm; being the stand was angled made this a bit more awkward to work out so I drew the drawing at a scale of 1:10 and measured the length and then multiplied it by 10.

Of course it just now occurs to me now that I could have just measured the angles from my scale drawing.  What I actually did to try and work out the angles was to quickly create a very basic model of my stand on 3DS Max as i did not have my first model and then measured the angle from the computer screen. Unfortunately in rushing this model I entered some information wrong and ended up with incorrect information.

I realized this error after I drew up (with what I thought were accurate measurements, shown below) a schematic of the portfolio stand on illustrator to show my tutor. It was immediately obvious to both of us that two things were wrong. 

1) The angle, what was meant to be a 70 degree angle was somehow 30 degrees. After the tutorial, I managed to draw a complete, full scale drawing and accurate sketch of the cross section and finally got it right.

2) The cut section in the design looked too thin. I eventually realized that in trying to make the cut out pieces so the 3cm wide sections would fit, I had measured the side of the wood at 3cm and not the pathway in the wood piece itself.