Framing Level Box Style Roof

To frame a roof start by choosing a roof style like a frame or gabled.

Framing level box style roof. It is used where large buildings are framed under one roof where hasty or temporary construction is needed and where sheds or additions are erected. The roof is held up by walls or posts where one wall or the posts on one side are at a higher level than those on the opposite side. Rick arnold frequent contributor to fine homebuilding and the journal of light construction presenter at jlc live the katz roadshow the remodeling show. This type of roof provides more options for extending the loft and installing windows allowing a greater amount of natural light into the room.

The upper portion of the roof is heavily pitched and the lower slope is gently pitched. Position the square at the end of the rafter board with the tongue on your left and facing away from you. As pictured above it is likely to extend much further than a mansard besides having the lower pitched slope on the bottom. Rather than a single slope a gable roof consists of two slopes that meet at a peak running down the middle of the roof.

Roof framing 3 5 psf 1 2 drywall ceiling 2 0 psf insulation 2 0 psf d l 19 psf. A half hipped roof is almost identical to a simple hip roof design but instead the two sides of the roof are shortened creating eaves at the either side of the house. Next use these calculations to determine how many rafters you ll need for your roof and cut them to size. Common or box allowable shear plf anchor bolts 12 long or 15 for 2 pour upper floor sill.

The roof framing must also function as part of the roof diaphragm to transfer lateral loads to the shear walls below. Design criteria and specifications. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. It is a complex framing style that can be or usually is a variation of the hip roof but a gable home may also make use of bonnet frame.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. Add the length of the overhang beyond this mark and. Then gather your measurements by calculating the run rise and length of each rafter segment in feet and the pitch of your roof in inches.

The roof framing must support the roof decking and sheathing and resist loads applied to the sheathing and transfer loads vertically to support walls or frames. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.