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1. A circular-shaped office building is located in downtown Boston, Massachusetts. It has a height of 160 ft, to which the lateral load is transferred to the MWFRS through the floor and roof system. The front-facing wall that receives the positive external pressure has an area of 1600 ft2, of which 400 ft2 is an open area. The other three side walls have a wall area of 1600 ft2 and openings of 100 ft2 each.

Is this office building an open, partial open, or enclosed building?

Which is the most appropriate MWFRS procedure to determine the wind loads?