Corrugated Cooling Tower
Paper: Hammermill 24lb. Flyer (8.5″ x 11″)
This is made from a basic corrugated sheet. The paper is flattened, and the short sides are joined with a strip of tape. The folds are then set again. The tendency for the folds to expand flares out the top and bottom, resulting in what people at my office described as “those nuclear plant things.”
I trimmed the edges with an xacto prior to taping… the regular squared ends can be interesting too.