The dual structure of fireproof doors and conventional shutters is integrated into the shutter system. The internal space of the building is used to the maximum (effectively installed around narrow aisles, emergency stairs and escalators in department stores). Emergency doors are installed on any part of the left, right or center (forward, backward, two types of automatic hinges). It fits perfectly without sagging or emergency opening. It is a type of door that can automatically slam shut when there is a fire alarm signal. They have the effect of preventing fire from spreading to other areas, establishing a fire compartment and creating a safe zone. Therefore, this is an indispensable part of office buildings, factories, plants, apartments, basements, schools. After many fires occurred causing great damage to both property and people, people have become more aware of using materials to help prevent and minimize the risk of fire and explosion, including fireproof rolling doors. From here we begin to hear fireproof terms such as E standard, EI standard or fireproof rolling door EI 60, EI 90, EI 120... EI fireproof rolling door, such as EI15 fireproof rolling door, EI30 fireproof rolling door, EI45 fireproof rolling door, EI60 fireproof rolling door, EI70 fireproof rolling door, EI90, EI fireproof rolling door, EI60 fireproof rolling door, EI70, EI fireproof rolling door equipment EI70 insulated fireproof rolling door, EI60 insulated fireproof rolling door, EI45 insulated fireproof rolling door, EI30 insulated fireproof rolling door, EI15 insulated fireproof rolling door Features E60 fireproof rolling door Can prevent smoke and fire for a period of 60 minutes. After 60 minutes, the rolling door begins to burn, not achieving the effect of resisting the fire. With a short fire resistance time, the 60-minute fire-resistant rolling door is only suitable for households or residential buildings with few people. For industrial parks, factories, and workshops, you should consider rolling doors with better fire resistance time. E70 fire-resistant rolling door Reaches the E fire resistance limit of up to 70 minutes. It has the same structure as the 60-minute door but will be reinforced in the structure to increase the fire resistance time to ensure that the door's material components are of the best quality but the price is still cheap. E120 fire-resistant rolling door is the rolling door line with the highest fire resistance level today, used by many contractors to ensure the highest safety for people and goods. EI standard in fire-resistant rolling doors EI (Integrity & Insulation) is the standard that specifies the fire resistance limit of materials and fire prevention means. E - Integrity is the integrity of fire prevention materials. Within a certain period of time, if the material still maintains its original shape or changes slightly within the allowable limit, the material meets the E standard. I - Insulation is the limit of thermal insulation. Within this limit, if the material still maintains its thermal insulation and the structure remains stable without being affected by heat, the material is considered to meet the I standard. The fire resistance limit of fireproof rolling doors is determined by the time from the beginning of the experiment of burning the material/product sample until the time when signs of cracking, breaking, exploding, etc. begin to appear, clearly noted in the instructions on fire safety. EI stands for the English phrase Integrity and Insulation, which is a set of standards regulating the fire resistance limit of fireproof and insulating components and products. This limit is determined by the unit of time from the start of the fire resistance test under the standard heating regime (ie increasing the temperature from 0 - above 1500 degrees Celsius) until the structure begins to show signs of the specified state limits. Specifically: E (Integrity): Is the limit of the integrity of the fireproof structure. At this certain limit, the structure still maintains its shape without breaking, cracking, etc. Regardless of the heat transfer capacity of the fireproof material. I (Insulation): Is the limit of the insulation capacity of the fireproof structure. At this certain limit, the structure still maintains stable insulation capacity and the main structure is not affected by the impact of high temperatures. Understanding the concept of the EI standard is very important. Because to classify fireproof products, we often rely on its EI standard. E (Integrity): The ability of a structure to prevent the spread of fire and smoke through the structure. During the 70-minute period, the structure must remain fire and smoke-free. I (Insulation): The ability of a structure to maintain the temperature of its unexposed surfaces below a safe level. During the 70-minute period, the temperature of the unexposed surfaces must be kept below a certain level to prevent dangerous heat transfer.