To design economical frame structures. it is necessary to determine the optimum frame layout and optimum cross-sectional area of each frame member. Although previous studies have proposed a variety of optimization methods. they can be applicable to small-scale frame structures and have been verified only for simple frame structures with a small number of design parameters. https://www.roneverhart.com/Cincinnati-Bengals-Pranzo-Lunch-Bag-Cooler-with-Utensils/