The Grand Dining Room is 130 feet long and 51 feet wide, with a 34-foot ceiling supported with rock columns creating a cathedral-like atmosphere. For fire safety reasons, the wood beams in the dining room are actually hollow and contain steel beams. The alcove window at the end of the room perfectly framed Yosemite Falls when the hotel was completed. Although the dress code for the park is usually very casual, the Ahwahnee Dining Room used to require a jacket for men, but it later relaxed that tradition. Now collared shirts for men are allowed and women may wear either a dress or slacks and a blouse.