What is a parapet, why is it called a parapet, and the parapet specification requirements.
The parapet, also known as the "granddaughter wall", is a low wall around the roof of a building. Its main function is not only to maintain safety, but also to make waterproof bricks at the bottom to avoid water seepage from the waterproof layer or rainwater overflow from the roof.
According to the regulations of building technical regulations, parapets are regarded as railings. If the building is above 10 floor, the height should not be less than1.2m.. In order to prevent the owner from intentionally heightening the parapet, it is also stipulated that the height shall not exceed 1.5 meters.
The function of parapet is to protect personnel safety and decorate the building facade. The function of parapet is not only to decorate the facade, but also to fix linoleum or waterproof coiled material.
In a word, parapet is a technical term of architecture, also called cornice wall, which is a joint treatment between roof and external wall. As a measure to deal with the appearance of roof railings or houses, it can not only prevent people from falling, but also play a role in waterproofing the roof.
Why is it called parapet?
The name of such buildings as "parapet" is quite special, which has aroused many people's curiosity. They want to know why the parapet is called the parapet. The specific answer is as follows:
The legend of parapet:
An ancient bricklayer was busy with his work and had to take his little daughter with him. One day, while building a house on the roof, my daughter accidentally fell to her death, and the craftsman was heartbroken. In order to prevent the tragedy from happening again, bricklayers later built a low wall on the roof, which was later named "parapet".
The true origin of parapet:
The "architectural style" of the Song Dynasty-"its simplicity, compared with the city, women are to their husbands" is the part above the edge of the city wall.
On the east bank of Huaihe River, the ancient cold moon, midnight, peep at the old palace. -Liu Yuxi's "Stone City"
It is very real to talk about it in its cave. Also known as the female wall, compared with the city, it is humble and small, if a woman is to her husband. "The Thirty-first Story of the Water Margin": "This Mengzhou City is a small place, and that Tucheng is not very bitter. On the side of the female wall, bow your head and press the giant, with the tip of the knife on the top and the tip of the stick on the bottom. " Also known as parapet, parapet and arrow crib.
Parapet specification requirements
Parapet specification requirements are as follows:
The main function of parapet in building is waterproof, which is often called parapet flooding. General roofing, slope, heat preservation, heat insulation, waterproof, etc. It's all done, about 250mm thick, and then consider that the end of the waterproof layer is rolled up to 250mm high, and the parapet is always 500mm high (now it is usually 600 or 700mm high).
In the specification, different places have different requirements for this height, which are basically limited. After all, this is a non-structural component and an unsafe factor in an earthquake.
As for other height expressions, such as not less than 1200mm, the parapet is considered as safety protection, which is different from the original intention. Considering the safety problem, a 600mm high railing can be made on the 600mm high daughter wall as protection.
It should be noted that increasing the height of parapet out of thin air not only increases the cost, but also has potential safety hazards. Therefore, it is best to take lightweight protection measures for the roof.
For the roof platform or roof garden for the elderly, the height of parapet guardrail on the roof should not be less than1.10m; The height of the roof protruding from the platform should not be less than 0.60m.