Some notes on preparing the roof trusses for the steel framed buildings

Start by removing the three tabs (as circled in blue), from each truss

Next, the small tabs on the ends of each truss require trimming such that the tab looks central; using a scalpel just remove a sliver from one side on each tab

Before:

After:

When it comes to positioning the truss into the side piece, make sure the truss tab sits on the inside of the building, such that the truss sits flush on the upright

Note that the small triangle brackets on the uprights should face inside the building