Pick the Pen Tool (P), draw a 40px, vertical path and place it as shown in the following image. Add a 6pt stroke, set its color at R=209 G=211 B=212, and change the blending mode to Multiply. Select this stroke from the Appearance panel and go to the Stroke panel.
Check the Dashed Line box, then enter 1pt in the dash box and 4 in the gap box. Finally, go to Effect > Stylize > Drop Shadow. Enter the data shown below and click OK.