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Anonymous users2024-01-23GMFM stands for steel and wood fire door (insulation depends on A or B at the back), 1024 width and height, b stands for door leaf with glass, d stands for single notch of door frame, l (L) stands for upper light (meter of door leaf, above is bright window) A is completely insulated! B is partially insulated, C is not insulated, which means that the fire resistance limit is 1 hour, B represents grade B, and -1 is a single fan. 5 is clockwise and 6 is counterclockwise!
k for the lower box!
Wanjia security door is good. Tier-one brand. Special lock, anti-technical opening time of 180 minutes, both convenient and anti-theft. The door panels are also good.
Anti-theft stamp. The new national standard changes the original three grades of the security door to four grades of "A", "B", "C" and "D", with Grade A being the highest and decreasing in turn. The anti-vandalism time of Class A security door is not less than 30 minutes, Class B is not less than 15 minutes, Class C is not less than 10 minutes, and Class D is not less than 6 minutes. >>>More
Now there are many varieties of security doors on the market, and the quality is also uneven, even if it is a well-known big brand of products, it is divided into several grades, so I choose the security door to consider the following issues, the owner of the tower reference. >>>More
This door is not protected from rain, your door is open, the best thing to do is to increase the height of the 2 floor tiles in the room behind the door by centimeters. I'm installing a water door, installing that kind of thin isolation door.
Now there are many brands of anti-theft doors on the market, so you must choose good quality when buying anti-theft doors. >>>More