From Atlanta, GA take I-85 north to exit 14, which is SC 187 (sign is for Clemson). Go left and take 187 north ab out 5 miles until it dead ends into US 76. Turn left and go about 5 miles to Clemson.
US 76 dead-ends into US 123. Go left. The next light is College Avenue. Go left. College Avenue dead ends into SC 93 (second light). Go left. Take your first left off of SC 93. The building on your right is the alumni/visitor center. You want to go into the visitor center to get a visitor parking permit and a map of the campus. They can also give you directions. To get to the visitor center is a little tricky. You have to turn right at the stop sign and go past the visitor center and the next building and then turn right - go around the second building and when you come back around the other side you can veer off to park at the visitor center.
My office is 300D Riggs Hall. From the visitor center go back to SC 93 and take a left. At the next light turn right. At the stop sign turn right. You are now heading directly towards Tillman Hall (with the clock tower) and the statue of Clemson.
At the statue bear left. Follow that road to the stop sign. Go straight through. That road goes down and then makes a 90 degree right turn. The building on your left is Riggs Hall. At the stop sign go left. Go to next stop sign and go straight. This is a cul-de-sac with visitor parking on the left. If you cannot find any open visitor space, park anywhere you can near by. Walk back up the street to Riggs Hall.
My office is on the 3rd floor. The building is a large U. My office is at the end of one of the "arms" of the U. You have to go down a little hallway off of the main hallway, and my office is at the end. There is a sign in the main hallway.