Abstract: A frame assembly for at least partially enclosing a raised floor structure includes a bottom frame member positioned adjacent an associated raised floor structure. A pair of spaced apart side frame members are connected to and extend upwardly from the bottom frame member. A top frame member is spaced from the bottom frame member and connected to the pair of side frame members. At least one picket extends between and is connected to the top and bottom frame members. The at least one picket is oriented approximately parallel to the side frame members. A screen is selectively mounted to at least one of the top and bottom frame members and the side frame members. The screen is located adjacent the at least one picket.