This week we've had to put a roof on to a large underground shed that houses the water tanks for the house I've been working on. For this roof we had to make two large pine trusses as the roof is to have Coraline sheeting on, so there will be no rafters only purlins.
Pine truss ready to go in
Made out of 9"x3" timber they are mortised and tenonned together with a large bridle joint for the top of the truss. They look really smart and should last many years.