Color steel coil is often used in the production and processing of engineering construction. In order to prevent the extravagance and waste of raw materials caused by buying too much, or the insufficient use caused by buying too little, people usually calculate the amount of raw materials to be used before buying. Many customers I don't know how to calculate its usage. The manufacturer below will give you a detailed introduction of its total area calculation method!1. The total usage of color steel coil refers to the sum of the total area of the outdoor stairs and corridors and the total area of the room surface. Among them, the total area of the outdoor stairs and corridors shall be calculated by the sum of the natural projection area, and the total area of the room surface shall be calculated by the wall width multiplied by the number of layers.