The forst section of tower crane is added to the stub at 171 Aberdeen.

Two tower crane permits. An additional foundation permit to add more caissons. Both scenarios conspiring to delay the assembly of a tower crane for 171 Aberdeen, the 11-story mixed-use apartment project in the West Loop.

But that’s all in the past. Tuesday, Central Crane Service was on site putting the crane together at long last. By the end of the day, the main shaft was up, with the cab sitting atop it. Expect the boom Wednesday, and an operational crane no later than week’s end.

Videos and photos follow: