Explains the criteria for “walls that separate dwelling units”

This time, I will explain this ‘Walls separating dwelling units’.

Hello! It’s Yamaken.

Then, I will explain.




Two types of performance are required for the Walls separating dwelling units.

Two types of performance.

① Noise reducing
② Fire resistant

Noise reducing regulation

The law stipulates as follows.

[Article 30, Paragraph 1 of the Building Standards Law]

The separation wall of each door of a nagaya or an apartment house shall conform to the following standards.
(1) The structure conforms to the technical standards specified by Cabinet Order with regard to the performance required for separation walls to reduce the noises reading from adjacent dwelling units in relation to daily life so as not to adversely affect sanitation, and uses the structural method specified by the Minister of Land, Infrastructure, Transport and Tourism, or has been approved by the Minister of Land, Infrastructure, Transport and Tourism.
(2) Reaching the wall to the attic

Next, the performance specified by government ordinance is specified as follows.

The transmission loss for the sound of the frequency listed in the left column of the following table shall not be less than the value listed in the right column of the same table.
Frequency (unit hertz)
Transmission loss (unit decibel)
125
25
500
40
2000
50

And the concrete structure method is prescribed in the notification. For example, the thickness of reinforced concrete is more than 10 centimeters. The details are written in this article, so please change the language to English.

【長屋や共同住宅における界壁とは何か】建築基準法施行令第114条の解説

2018-11-30

 

Then, next is fire resistant.

Fire resistant regulation

The law stipulates as follows.

[Article 114, Paragraph 1 of the Order for Enforcement of the Building Standards Law] The separation wall of each door of a nagaya or an apartment house shall be of semi-fire-resistant construction and shall reach the attic or the ceiling.

Semi-fire-resistant construction is basically a type that can withstand flames for more than 45 minutes.

Also, a semi-fire-resistant floor is required between the first and second floors.

Summary

This time, I explained the regulation of the walls separating dwelling units.

Product performance in actual apartment buildings is designed to exceed legal standards to improve the comfort of the living environment.

Thank you very much for watching until the end.