What are the various kinds of union structures?

What are the various kinds of union structures?

• Craft Union: In this type of trade union all the members perform same type of work even they possess specialized skills and training.

• Industrial Union: in this type of union is the group of many employee of the same industry. It is having all types of members with different position. These unions have both skilled and unskilled members.

• General Union: This type of union have members from different industry from a particular region or city.

• Federations: These are national level unions from where all the above unions get affiliation.