What is the purpose of a parapet wall?

I would like to know that too; I want a professional explanation

1. The parapet wall can enhance the aesthetic appearance of a building. 2. It helps to protect people’s safety (usually at a height of 1.2 meters to 1.5 meters). 3. It is used to secure asphalt shingles or waterproofing membranes. 4. In the absence of a concrete coping, the height is measured from the top surface of the floor slab up to the top of the parapet wall. 5. It serves as a means to ensure waterproofing at the edges

A parapet is a low wall surrounding the roof of a building. Its main functions include ensuring safety; at its base, waterproof bricks are used to prevent water leakage from the waterproofing layer or water from flowing over the roof.

Why don’t many residential buildings have parapets on their rooftops?

These days, the rooftops of residential buildings are made by pouring concrete first and then covering it with tiles; the tiles themselves are also constructed from concrete. This gives them sufficient weight, preventing leaks, so there’s no need for anything else

It’s probably meant for watching over one’s husband. It looks stylish, but its practicality is limited; since it’s located on top of the beam, it’s prone to cracking at the junction with the beam

In ancient times, the parapet was called “nüqiang,” which carried the meaning of spying; it was a wall projection built on city walls in imitation of the way a woman looks down disdainfully. Over time, it evolved into a specialized term in architecture. It specifically refers to a low wall that extends above the roof of a building, and can still be seen in existing ancient buildings from the Ming and Qing dynasties. 　　 The origin of the parapet wall is quite interesting. According to folklore, in ancient times, wealthy families, constrained by feudal traditions, built a wall on top of their roofs and walls in order to prevent their daughters from going outside freely. Yet, despite being confined indoors, the girls couldn’t resist the allure of the outside world, so they would secretly climb up onto the roofs or high walls to look out through that low barrier. Over time, this structure came to be known as the parapet wall. This is another legend regarding the origin of the parapet wall. There are various architectural forms for parapets; generally, they come in solid walls and those with observation holes. 　　 According to Ciyuan, they are small walls on the city walls that have a raised and lowered texture. In Shiming: Explanation of Palaces and Houses, it is said that such walls on top of the city walls are called \"pi ni\", …… and they are also called \"nv qiang\", as they are relatively low and small compared to the main city walls. ”The reason is that in ancient times, women were of low status and had no significance, so this term was used to describe the ridged surfaces on city walls; hence the name \"daughter wall\". 　　The above is an introduction to the origin of parapets; I hope it can be helpful to my friends. With the development of society, the parapet wall has become a specialized term in the construction industry. **According to building codes, a parapet wall is a low wall made of brick and concrete, with a height of 90 centimeters.