Hip Roof Tributary Area

Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet.

Hip roof tributary area. I get confused over the tributary area. The illustrated area is part of the tributary area at the roof deck level. 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. In this case the resulting load distribution would have a linearly varying component.

This calculator will help you estimate hip roof parameters including rafters and roof area person outline anton schedule 2011 08 29 17 53 20 one of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area. To total the load on an area multiply the area times the psf. On another note just remember that larger tributary areas for roof beams mean big wind loads just like they mean big gravity loads. Beam a has 2 sq ft of contributing load on each side a tributary load.

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 hip beam also picks up a point load reaction from a pair of the roof girders. Also agree that a sketch would help. Hip roof area calculator.

The base width is the distance from one corner of your roof to the other at its base on the short side of your house. Our roof calculator uses base length and base width to find the estimated area. 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. 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.

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. 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. 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.

The load on each sq ft is 100 psf. This beam picks up load from joists of varying lengths.