The 1-Side Room is one of the basic sections that adds rooms to your corridor layout. Place the 1-Side Room in between any two corridor sections to add a room that splits off to the side. The room is sized so that you can wrap other corridor sections around it and it will fit snugly in the middle. Two 1-Side Room sections will not fit right next to each other because of the width of the room piece, but replace those rooms with Narrow Side Rooms and you can line up as many 1-Side Room sections as you like. Like all Bug Hunt Corridor rooms, the door moves so that you can use it either open or closed.