Americans have gotten bigger, leading to bleacher seat widths increasing from 18 to 20 inches. When developing outdoor event seating, planners must consider ADA and safety guidelines like closing areas under seats, railings on aisles, and enclosing structures. In the 1960s-1980s, many natural turf fields were converted to synthetic turf to reduce maintenance costs and allow flexible scheduling, but player injuries and new synthetic turfs replicating grass led to conversions back in the 1980s-1990s. Key elements of a great field include drainage and a backstop to keep balls in play, protect spectators, and safeguard others involved in the game.