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2008-May-10 - Wooroloo - Installing Purlins weekend #1
Spent a fair bit of time checking some columns for vertical

Ran a string line - to check for straightness of this edge

Have about 4mm of error on the LHS edge

Came up with a strategy to keep purlin straight

Welded on cleats on stairway beam, and two front beams

Purlin dropped in perfectly.

Drilled holes and bolted in 12 mm galvanised bolts at the cleats

Used Tek Screws at a number of places along the steel framing to secure purlins.