The Temple Institute: In-Depth Temple Study: The Mikdash: Outer Structure
 
The Mikdash: Outer Structure: Dimensions

The compartments were three stories high. Each compartment had at least three openings which were used to pass from one toanother. An additional opening provided access between the lower and upper compartments.The width of the compartments was narrowon the bottom floor - 5 cubits - and increased by one cubit with each ascending level. *  

Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII