Behind the Rock Samples
Dave Dahl, a geologist with the DNR Lands and Minerals Department in Hibbing, examines these drill cores to further learn about how the land has changed and to get a better look into geological history. This rock is studied by various mineral explorers from around the world because of the similarity in samples from different countries. These cores have also led to new discoveries of minerals throughout the State of Minnesota.
In this case, the DNR needed a very sturdy, and durable rack system to hold these heavy mineral cores. “The library’s three buildings contain 300,000 boxes of rock cores, from granite to sandstone. Each box weighs about 30 pounds, so the whole collection weighs 9 million pounds. It might be Minnesota’s heaviest library” (pg. 51). It was important for Brian to know all of these weights and capacities, so he could set up the DNR with the heavy duty pallet rack they needed. Brian utilized a Speedrack reinforced column with over sized footplates for the uprights along with standard heavy duty cross beams to complete the system. In the end, the DNR was provided with a heavy duty industrial rack system that they could easily store and access the rock samples when needed.
“Minnesota has some of the oldest rocks in the world… about 3.6 billion years old.”