PORTAL FRAME CONSTRUCTION

Bunnings store

This photo was taken inside the store, it shows rafters supporting 'z' purlins. The z purlins are holding up the roof, sarking and safety mesh.

Here is the rafter joint, it is where the two rafters meet in the centre of the roof. The two end plates are bolted together and a column supports this joint.

This is a closer detail of a knee joint, where the column supports the rafter with a welded joint between the end plate of the rafter and the side of the column. A haunch is connected with a welded joint between the column and the rafter to help shear forces