C plf pounds per lineal foot is used to describe loads on walls or long members such as beams.
Hip roof tributary area.
The illustrated area is part of the tributary area at the roof deck level.
A simple span roof hip beam s load is a distributed load of triangular shape with load 0 at the corner of the roof and max.
This beam picks up load from joists of varying lengths.
Roof tributary length 9 ft roof psf live 25 dead 13 total 38 load f roof point load live 9 ft x 25 225 lbs live loadrafters.
The beam receives an equal load for each foot of length.
You probably know this but i see ridge beams with huge tributary areas for uplift simply toe nailed into a stud stack all the time.
The load on each sq ft is 100 psf.
Shaded area is contributing load to hip rafter r2 2 3 load hip the hip rafter exterior walls ridge rafters roof slope is 9 12 pitch.
The hip beam also picks up a point load reaction from a pair of the roof girders.
Beam a has 2 sq ft of contributing load on each side a tributary load.
In this case the resulting load distribution would have a linearly varying component.
Area is defined as the expanse or measurement of a given surface and there are a few methods for measuring your roof s area.
Hip roof area calculator.
Our roof calculator uses base length and base width to find the estimated area.
To total the load on an area multiply the area times the psf.
I get confused over the tributary area.
Also agree that a sketch would help.
Assuming 34 psf dead and live load and assuming that the hip is the diagonal of a 9ft x 9ft square 18ft wide roof with equal slopes and assuming i m using the true length of the beam as supposed to the.
Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise common and hip rafters length and roof area based on width height of roof base and the roof pitch identical for all sides.
On another note just remember that larger tributary areas for roof beams mean big wind loads just like they mean big gravity loads.
In general terms perhaps the forces on the hip rafter jack rafter connection consist of the tributary roof load transfered by the jack rafter plus a force along the axis of the jack rafter for our purposes the force along the axis of the jack rafter has a vertical component that supports the hip rafter the method of computing this supporting force and the resulting stress and deflection.
Refer to page 243 definition of effective area tributary width need not be less than 1 3 span length roof trusses span 30 feet 2 feet on center 60 square feet tributary area use 10 feet wide x 30 feet 300 sq feet for effective area for gcp part 1.
