Mathew Robbins, left, and Paul Levine prepare a structure section in a frame-raising along East Animas Road (County Road 250) north of Durango on Wednesday. The style of building is traditional American timber-framing, Robbins said. The mortise, the cavity in the timber, and the tenon, the projection at the timber’s end, are pegged together without using any nails. It took “all winter to cut pieces,” said Joe Rohrich with Lorien Timberframes. Rohrich is perched on top of the frame.