A manual on building rigid frame buildings using 4 straight peices of lumber together with nailed plywood gussets to create a rigid load carring unit. Once all ribs are ready they are stood up and covered with plywood on the exterior. After having built 4 of these I can say that construction is fast. Frame is up in one day and covered on all sides with plywood. 2nd day the roof was finished and siding started. Interior is wide open with no need for load bearing walls. We used 2x8 construction and super insulated. Only used 1 cord of wood to heat in the Maine winter.