V3 CMS tracker layout: Detector Break-up

This note reports on the detector and channel break-up of the CMS V3 tracker layout. A compilation of alternative layouts is also tabulated to allow for cost estimates as a function of layout configurations. The information is organized in a modular fashion: for each configuration, the break-up of 25 cm ( 'one wheel') of barrel is reported. The forward detectors ( 'disks') are described individually as a function of equipped annuli. The total number of channels, the area and the bare cost of the provisional V3 layout are estimated. This note will be updated as the V3 layout evolves.