The U-shaped staircase design is suitable for large houses. These two parallel staircases are connected by 180-degree turn lending. This staircase is also called a switchback stair design. It is very easy to add them to the architectural plan. This staircase can create a focal point. This type of staircase gives good beauty and luxury. These U-shaped staircases offer a beautiful and efficient way to connect two floors in a small space. They usually have a narrow design and require less space.A straight stair design makes it an ideal choice for many types of homes. It consists of a simple staircase that leads directly from one level to another. These straight staircases are very affordable and consist of a series of steps in the same direction. Suitable and safe for homes and businesses. They are an ideal choice for homes with children and the elderly. Eco-staircase designs typically form a complete circle as the design wraps around a pole when viewed from above. This type of staircase is suitable for small-scale homes like beach houses and urban apartments.