Topping out

The traditional ceremony when the final, highest structural beam is hoisted into place on a new building. Typically the beam is painted white, signed by the crew, and flown with an American flag and an evergreen tree lashed to it. Roots trace back to Scandinavian tree-topping rituals — bringing a tree to the top of the new structure to appease the spirits of the displaced trees. Now it's a crew milestone, an excuse for food, beer, and photos.

Also: finishing your apprenticeship. The day you 'top out' you're a journeyman. Often celebrated with a turn-out ceremony at the union hall.