Building Standards Law Enforcement Order Article 62-8
(The translator adds the following: This provision applies, for example, to walls erected along neighbouring property lines or road boundaries for the purpose of ensuring privacy or preventing intrusion.)
A reinforced concrete block wall shall be constructed in accordance with the following provisions (except for provisions (v) and (vii) in the case of a fence of 1.2 meters or less in height).
however, that this shall not apply where it is confirmed that the fence is safe in terms of structural capacity through structural calculations in accordance with the standards specified by the Minister of Land, Infrastructure, Transport and Tourism.
(i) The height shall be 2.2 meters or less.
(ii) The thickness of the wall shall be 15 centimetres or more (10 centimetres or more in the case of a wall not exceeding 2 metres in height).
(iii) Reinforcing bars of 9 mm or more in diameter shall be placed horizontally at the top of the wall and at the foundation, and vertically at the ends and corners of the wall.
(iv) Within the wall, steel bars of 9 mm or more in diameter shall be placed horizontally and vertically at intervals of 80 cm or less.
(v) Every 3.4 meters or less in length, buttresses with reinforcing bars of 9 millimeters or more in diameter and protruding more than one-fifth of the height from the wall at the foundation shall be installed.
(vi) The ends of the reinforcing bars arranged pursuant to the provisions of the preceding items (iii) and (iv) shall be bent in a crooked manner and anchored, in the case of longitudinal bars, to the top of the wall and to the transverse bars of the foundation, and in the case of transverse bars, to these longitudinal bars. However, where longitudinal bars are anchored to the foundation at least 40 times their diameter, the ends of the longitudinal bars may not be crooked to the transverse bars of the foundation.
(vii) The length of the foundation shall be 35 centimeters or more, and the depth of the root insertion shall be 30 centimeters or more.