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.
Rather than a single slope a gable roof consists of two slopes that meet at a peak running down the middle of the roof.
At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.
Roof framing 3 5 psf 1 2 drywall ceiling 2 0 psf insulation 2 0 psf d l 19 psf.
Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.
Design criteria and specifications.
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.
Roof diaphragm design shearwall design continuous footing design.
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 upper portion of the roof is heavily pitched and the lower slope is gently pitched.
As pictured above it is likely to extend much further than a mansard besides having the lower pitched slope on the bottom.
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.
Rick arnold frequent contributor to fine homebuilding and the journal of light construction presenter at jlc live the katz roadshow the remodeling show.
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.
To frame a roof start by choosing a roof style like a frame or gabled.
Add the length of the overhang beyond this mark and.
Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.
Common or box allowable shear plf anchor bolts 12 long or 15 for 2 pour upper floor sill.
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.
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.
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 roof framing must also function as part of the roof diaphragm to transfer lateral loads to the shear walls below.
To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.
