What is the difference between CN and PN in Jianbei symbols?
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What is the difference between CN and PN in Jianbei symbols? That friend knows how to give some guidance.
PN refers to the design north direction; it is not necessarily the exact north direction of the building’s location, as there may be a certain deviation. CN, on the other hand, is determined based on coordinates and indicates the true north direction!
What the friend on the second floor meant is that CN=N. You can understand it that way, right! What are the abbreviations for C and P in English?
PN PLANT NORTH: PN is different from the north direction indicated on the map.
Addition: CN Jianbei Construction north
Isn’t PN Plant North, meaning construction in the north?
PN=CN; these two are the same thing.
PN means northern construction direction, which is different from the geographical north direction
I still don’t understand. Please explain it in more detail!
It can be said that PN and CN mean the same thing: Plant North = Construction North. But there is also another concept related to north direction, namely Geographical North, which refers to the true northern direction; on engineering compasses, this is denoted by the letter N. Geographic north refers to north in geographic coordinates, which is true north geographically. The north in a factory is also called Jianbei; it refers to the north in architectural coordinates and is a relative coordinate. Generally, the two do not overlap and there is an angle between them. It’s similar to absolute elevation and relative elevation. This angle is generally the angle between the wind rose in the general layout and the coordinates.
It’s the first time I’ve heard of something like this; I’ve learned something new.
True NORTH is sometimes used to represent TN in geography
CN PN DN I’m confused. Could you explain it again? Why is it so complicated to say?
I’ve learned a lot, gained plenty of insights, and my thinking has become more open. Thank you
The second half of the answer on the 2nd floor is incorrect; it should be: CN, just like PN, refers to the north direction as defined in construction standards, and not the true geographical north.
What was said upstairs makes a lot of sense; it’s the first time in all these years of working that I’ve noticed Pn
It was only by looking at the standard HG/T20546.1-2009 that I learned about the concept of PN.