As I understand the original question, about half of the building is filled with equipment. However, for the purpose of this discussion, I think it is important to understand the purpose and intent of the term Common Path of Egress Travel.
The purpose of this provision is to limit the travel distance when only a single path is available to the building user as a means of egress. It's analagous in my mind to a dead end corridor. The intent of the NFPA 101 and the IBC provisions is that in most cases a common path of egress travel is based on two separate and distinct paths of egress travel toward two or more exits.
The individuals writing the code recognize that their are certain building uses that represent such a fire hazard that they almost always require two exits - conversely, we know from fire loss history that in most instances buildings with a smaller area provide an inherently easier means of egress.
In the case of your building, you technically have only have one point of exit discharge (the West doors). The North door can be used but it cannot be treated as a component in the egress system because its location does not meet 1/2 of the diagional of the exit travel distance - that's OK under the common path of travel provisions.
I'm not sure what the Life Safety Code requires but under the IBC we previously classified the building as a Group B occupancy. IBC Section 1014.3 allows the common path of travel in Group B occupancies to 100 feet or less. Given your previously calculated occupant load, only a single door is required and its width is adequate.
Did that help answer the question?