Framing Level Box Style Roof

Next use these calculations to determine how many rafters you ll need for your roof and cut them to size.

Framing level box style roof. The roof framing must also function as part of the roof diaphragm to transfer lateral loads to the shear walls below. Rather than a single slope a gable roof consists of two slopes that meet at a peak running down the middle of the roof. When matched to the angle and proportions of other rooflines on the house your gable roof will add visual interest and character to the home making the addition look like an asset that belongs with the house. This type of roof provides more options for extending the loft and installing windows allowing a greater amount of natural light into the room.

Roof framing 3 5 psf 1 2 drywall ceiling 2 0 psf insulation 2 0 psf d l 19 psf. 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. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. As pictured above it is likely to extend much further than a mansard besides having the lower pitched slope on the bottom.

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. 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. 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. Common or box allowable shear plf anchor bolts 12 long or 15 for 2 pour upper floor sill.

Design criteria and specifications. Add the length of the overhang beyond this mark and. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. The shed roof or lean to is a roof having only one slope or pitch.

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. Roof diaphragm design shearwall design continuous footing design. To frame a roof start by choosing a roof style like a frame or gabled. Rick arnold frequent contributor to fine homebuilding and the journal of light construction presenter at jlc live the katz roadshow the remodeling show.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. The upper portion of the roof is heavily pitched and the lower slope is gently pitched.