This pro edition features a no nonsense approach to calculate anything to with construction. If your wanting to advance yourself in construction, then you need this (the most valuable tool in the toolbox.)
Featuring a collection of wizards that guide you through:

Diagonals for squaring up layouts

Stairs

Common rafters

Lean-to rafters

Jack rafters

Hip roof (complete and works with different pitches)

Gable studs

Roof decking