Isolation Joint

Isolation joint is similar to expansion joint but provided under the following conditions:

1. When it is desired to separate the foundation of machines from the rest of the structure.
2. When one portion of a building is higher than the other.
3. When one portion of a building rests on rock and the adjacent portion on com pressible clayey soil.

Figure 17.18 Expansion at corner of walls

Figure 17.19 Expansion joint at roof level