What is the difference between putlog and independent scaffolding

A putlog is a type of scaffolding that is put on walls and extensions from walls support it. In most buildings that use putlog scaffold, the hole where the putlog is extended from is never covered. It is left that way for future constructions. It is important to note that the walls have to be strong enough to support the weight of a scaffold before it is erected. 

The main difference between putlog and independent scaffolding is the way they are erected. The putlog scaffold is supported by the wall while independent scaffolding is erected from the ground up. 

Scaffolding built using putlog system

Even though it is erected from the wall, there may be some supporters from the ground that helps in distributing and balancing the weight. It is used in construction but is most common in festivals. 

Putlog vs Independent scaffolding

It has extensions from the wall supporting itIt is erected from the ground up
It offers more stability due to its rigidityNot as rigid compared to putlog
You need fewer materials to erectNeeds more materials for the erection
There are uncovered holes left on the wall after removing the putlogDoes not need or leave any holes on the wall