Join Date: Jul 2002
Location: Still going through ORD security when boarding has already started
Programs: AA EXP, UA Silver, HH Gold, Bonvoy Gold, IHG Plat, Hyatt Disco, Reno Air MEGA Platinum
Posts: 10,293
This is very normal for the FS Chicago. The front desk used to give out cards at checkin on windy nights to warn guests ahead of time. Should have earplugs in the room too.
As iluv2fly mentioned, the building is designed to sway in the wind, causing the creeking noise. The lowest floor at FS Chicago is the 30th, so there's no avoiding it.