CMU Newell Simon Hall 3002
Newell-Simon Hall is indicated on the following map (note, South is up on this one!). The area where construction is taking place is shown in orange and is inaccessible. You should park in the Morewood lot across Forbes Avenue. Most of the parking area in front of Newell-Simon is fenced off, but a few parking spaces for the disabled are generally available between Newell-Simon and Hamburg Halls.
Walk into the third floor door also known as the main entrance of Newell-Simon Hall.
The interior doors are normally locked. A sign in the entryway will give you a phone number to call for someone to let you in. Room 3002 is just ahead on the left as you enter. A larger map (where North is up) is shown below.
Also see this Google map if you need directions to the area.