Longitudinal skylights refer to the roof smoke vent arranged longitudinally based on the mountain wall. Taking into account the drainage of the slope roof, the longitudinal smoke vents will not be arranged on the slope, but directly installed on the ridge of the factory building, so it is called the roof smoke vent. Relatively speaking, the general geometric size of the roof louver vent arranged on the ridge is larger than that of the downhill smoke vent skylights, because they are located in the factory building. For most factory buildings with the same slope length, they are located in the center of the air inlets on both sides of the factory. The location has a greater impact on the overall indoor ventilation. Both horizontal skylights and longitudinal skylights can choose roof louver vent and streamlined natural ventilator. For example: refer to the national standard atlas of roof ventilation industry 11CJ33 "Ventilation and daylighting skylights" in the figure on page 5 MCW1Z type smoke vents mean that the model of the ventilation skylight is MCW1 low-profile ventilator, "Z" means longitudinal arrangement; MCW6H type ventilation The skylight also refers to the transverse ventilation skylight of model MCW6. Roof ridge ventilation skylights (longitudinal skylights) are generally more than 3 meters in size, and their structure depends on the selection. Commonly used reference national standard atlases for ventilation skylights are 05J621-3 "Ventilation skylights", 11CJ33 "Ventilation daylighting skylights" Etc., ridge ventilation skylights (longitudinal skylights) can also be customized by professional roof skylight manufacturers to non-standard specifications. Different types of roof ventilation skylights (longitudinal skylights) have different structures. For example, thin roof ventilation skylights are usually made of aluminum-zinc-plated steel sheet. They are characterized by mass production, light weight, convenient assembly and assembly, and low ventilator height. It is short and has good wind resistance; the streamlined roof ridge ventilation skylight frame is mostly made of thin-walled hollow square steel, which is bent and welded, and then installed on site. Its characteristics are streamlined structure, beautiful appearance, and high ventilation efficiency. The ridge ventilation skylight (longitudinal skylight) can be set to open or open and close according to the actual situation of the steel structure factory. It is worth mentioning that there is a certain difference in cost between open and open roof ridge ventilation skylights (longitudinal skylights), and the cost of open and close opening methods will be slightly higher than that of open opening methods. I hope that customers and friends can choose the ventilation skylights and opening methods suitable for their own plants within the budget.