Self-restrained dismantling joints are versatile and can be employed in numerous engineering applications. For example, in the field of civil engineering, SRDJs are commonly used in pipe systems for water supply, sewage, and gas distribution. These systems often require periodic inspections, and the ease of dismantling provided by SRDJs simplifies maintenance processes significantly.
As it has been mentioned, round manhole cover is very common to see and you may wonder why it appear that way. This is mainly for the reason that circular covers cannot surely slip into the hole even if it will be push diagonally, unlike manhole covers in rectangular, square, or oval which can slip into the hole if not placed on the right position.