{Building Elements Category Tree
	{Floors
		{Raised Floors}
		{Floor Covers}
	}
	{Ceilings
		{Hung Ceilings}
		{Ceiling Finishes}
	}
	{Walls
		{Outer Walls}
		{Fire Walls}
		{Office Walls}
		{Posting Walls}
		{Display Cases}
	}
	{Doors
		{Entrance Doors}
		{Fire Doors}
		{Regular Doors}
		{Light Glass Doors}
		{Door Locks}
	}
	{Windows
		{Fixed Windows}
		{Openable Windows}
	}
}