很多店主和库管选门时只问一句“多少钱一平方”，装完第一个春天就后悔：风一吹帘片鼓包、遥控器偶尔罢工、关门底缝漏灰。卷帘门不是布帘子，它是靠“骨架+动力+平衡”三件事撑起来的户外设备。

Many shop owners and warehouse managers only ask "how much does it cost per square meter" when selecting doors, and regret the first spring after installation: the curtain bulges when the wind blows, the remote control occasionally strikes, and the bottom seam of the door leaks dust. Roller shutter doors are not fabric curtains, they are outdoor equipment supported by three things: "skeleton+power+balance".

先按场景挑类型，别全用一种门通吃：

First, choose the type according to the scene, don't use one universal door:

临街商铺、小区车库：铝合金或彩钢电动款，要静音和遥控，每天开关好几次，手动款用半年就懒得拉。

Street facing shops and community garages: aluminum alloy or color steel electric models, requiring silent and remote control, with several switches on and off every day. Manual models are too lazy to use for six months.

厂房、物流口、空旷院子：建议上抗风卷帘，帘片加厚、导轨加深，济南春秋风大，普通门容易被吹得脱轨。

Factory buildings, logistics entrances, and open courtyards: Wind resistant rolling shutters must be installed, with thicker curtains and deeper guide rails. In Jinan, the spring and autumn winds are strong, and ordinary doors are easily blown off track.

车间物流通道、叉车频繁过：选快速卷帘门，启闭速度0.6到2米/秒，减少冷气外流和等待。

Frequent passage of workshop logistics channels and forklifts: Choose a fast rolling shutter door with an opening and closing speed of 0.6 to 2 meters per second to reduce cold air outflow and waiting.

消防分区、地下车库隔断：走防火卷帘，无机布双轨或钢质都行，但建议有GB 14102检测报告和烟温联动，别拿普通门顶替，验收过不了。

Fire zone and underground garage partition: Use fire-resistant rolling shutters, inorganic cloth double tracks or steel, but there must be a GB 14102 test report and smoke temperature linkage. Do not replace them with ordinary doors, as they will not pass the acceptance inspection.

再看四个容易偷工的参数：

Let's take a look at four parameters that are prone to stealing work:

第一，帘片厚度。商铺单层彩钢或铝片别低于0.8mm，工业抗风款1.2到1.5mm起步，带加强筋。同样外观，0.6mm和1.2mm寿命差一倍。

Firstly, the thickness of the curtain. The single-layer color steel or aluminum sheet of the shop should be less than 0.8mm, and the industrial wind resistant version should start from 1.2 to 1.5mm, with reinforcing ribs. With the same appearance, the lifespan of 0.6mm and 1.2mm is twice as long.

第二，导轨和卷轴。导轨壁厚≥1.5mm，卷轴用无缝管、壁厚≥2mm。小轴配大门，转两年就中间下垂、帘片跑偏。

Secondly, guide rails and scrolls. The wall thickness of the guide rail is ≥ 1.5mm, and the roller is made of seamless tube with a wall thickness of ≥ 2mm. The small shaft is equipped with a large door, and after two years of rotation, it will sag in the middle and the curtain will deviate.

第三，电机别虚标。家用220V管状电机，商铺用800到1000W，工业大门直接380V三相。电机要有过热、过载、遇阻反弹，停电能切手动离合。

Thirdly, do not label the motor falsely. Household 220V tubular motor, commercial use 800 to 1000W, industrial gate direct 380V three-phase. The motor should have overheating, overload, rebound when encountering resistance, and can switch to manual clutch when power is cut off.

第四，平衡扭簧。很多人忽略它，其实电机只负责起步，剩下靠扭簧扛重量。扭簧断一根，门会带着帘片往下砸，非常危险，建议整组换、不能单根补。

Fourth, balance the torsion spring. Many people overlook it, in fact, the motor is only responsible for starting, and the rest relies on the torsion spring to carry the weight. If one torsion spring breaks, the door will be hit downwards with the curtain, which is very dangerous. It must be replaced as a whole and cannot be repaired individually.

安装和保养里非常值钱的两步：

The two most valuable steps in installation and maintenance:

导轨垂直度偏差每米不超过1.5mm，膨胀螺丝打混凝土梁，不打空心砖。

The deviation of the verticality of the guide rail shall not exceed 1.5mm per meter. Expansion screws shall be used to drive concrete beams, and hollow bricks shall not be used.

每季度清一次导轨石子、给链条和轴承上锂基脂；遥控距离变短先换电池，再对码，别一失灵就换整套控制箱。

Clean the guide rail stones and apply lithium grease to the chains and bearings every quarter; When the remote control distance becomes shorter, replace the battery first, then check the code. Don't replace the entire control box as soon as it malfunctions.

把“场景定门型、厚度定寿命、电机定力气、扭簧定安全”这四句记在询价单上，同样一樘门能多安稳用好几年。

Write down the four sentences of "scene determines door type, thickness determines lifespan, motor determines force, and torsion spring determines safety" on the inquiry sheet, and the same door can be stable and used for several years.