In this use, structural steel rebar provides the strength and stiffness to the concrete, while the cured cement holds the rebar stationary. Rebar alone would flex too much and cement alone would crack easily. However, when combined to form a composite, an extremely rigid material is created.
Autodesk ended Vista support in 2012 and the versions 2013 and up are not compatible with Vista. AutoCADu 2008 (and 2009-2012) compatibility applies for both 32-bit and 64-bit versions of Windows Vista Home Basic, Home Premium, Ultimate, Business and Enterprise. For AutoCAD 2007 and AutoCAD LT 2007 Autodesk has released Service Pack 2 which makes them compatible with the 32-bit version of Windows Vista.
It can also play the music that you're seeing. Scorch generally works well if you're using a windows computer, but is currently not compatible with mobile devices and some web browsers on Mac computers. If your web browser does not install Scorch automatically, you can click here to download and install scorch manually.