Each space or interval between the frames of a steel building is a "bay." In the illustration below, a 100' long building has been divided into four bays by spacing the frames 25' apart (4 x 25' = 100'). This configuration is described as "four bays at 25." A 100' building could just as easily be configured with five bays at 20 (5 x 20' = 100') by adding another main frame. Often, using fewer frames reduces the weight and, hence, the cost of a metal building, but this is not always the case. It depends on the size of the building, the width of the bays, the load requirements and many other factors. Our online design and pricing system offers only symmetrical bay spacings; however, you can request a special quote
for mixed bay configurations.