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A Dutch Hip is a variation of a standard hip that has a small gable section at the peak. The small gable can provide an attractive alternative to the standard hip as well as provide room for additional ventilation. To calculate a Dutch Hip, Easy Rafters essentially calculates a common rafter for the main roof and calculates a 90º bay for the dutch hip section of the roof.
The Dutch Hip preview window displays a plan view, side view, and elevation view of the dutch hip roof that reflects the actual dimensions of the roof and updates as the dimensions are changed. The drawing pages display dimensioned side views of the common, dutch common, dutch hip, and dutch center ledger rafters. A schematic top view is included in the hip rafter drawing to illustrate the location of the measuring line and the types of bevels required.
The Parts of a Dutch Hip Roof
The common rafters extend perpendicular from the side wall of the building to the peak of the main roof. The main roof common rafters will always be longer than the dutch common rafters.
Dutch Common Rafter
The dutch common rafters extend perpendicular from the end wall of the building to the center ledger of the dutch hip. If separate ledger boards are used dutch common rafters also serve as the side ledgers that run from the side walls to the ends of the center ledger.
Dutch Hip Rafter
The dutch hip rafters extend at a 45º angle from the outside corners of the building to the joints between the side ledgers and center ledgers with their top edges flush to the tops of the ledger boards. If separate ledgers are not being used, the location of the ledgers should be marked on the end rafters of the main roof and then used to locate the hip rafters.
Dutch Center Ledger
The dutch center ledger, if used, fits between the ends of the side ledger rafters. If no ledgers are used, the location of the ledgers should be marked on the end rafters of the main roof and the area of the center ledger should be filled in flush to the face of the end rafters to provide a nailing surface for the dutch common rafters.
Jack rafters extend perpendicular from the wall plates to the hip rafters. The tail ends of the jack rafters are identical to the common rafters, but the top plumb cuts have a single 45º bevel to frame against the hip rafters. Use the jack rafter common differences listed on the hip rafter printout to determine the jack rafter lengths.