Gable Roof No Ceiling Joists

How to frame a gable roof with no ceiling.

Gable roof no ceiling joists.

Spans for ceiling joists shall be in accordance with tables r802 4 1 and r802 4 2. Gable end truss to end wall top track. In this design the tops of the rafters attach to a load bearing ridge beam that runs along the length of the roof. At gable end truss.

10 screws in accordance with table r804 3 1 1 3 evenly spaced not less than 1 2 from all edges. Rafter ties or ceiling joists acting as rafter ties are required by code unless the house is designed so that the walls or a structural ridge beam carries the full load of the roof. For other grades and species and for other loading conditions refer to the awc stjr. A client wants to create a vaulted ceiling in an addition with a shallow 4 12 pitch roof the rafters are 16 inches o c with no structural ridge.

Someone with more knowledge please correct me if i m wrong. The thrust to worry about is at the tails of the common rafters. The shape and size of a roof depends on the span and the floor plan of the building. A structural ridge is the standard alternative to ceiling joists.

On edges and 12 o c. Ceiling joist or roof truss to top track of bearing wall b. Yes you can raise the ceiling joists but with restrictions. Can i raise the ceiling joists to create the vaulted ceiling.

If you build a square hip roof you can do it without ceiling joists. A gable roof consists of two upward sloping sides that slope at the same angle and from the end look like a symmetrical triangle. A gable roof is a heavy structure and if you want to prevent your roof from collapsing you ll have to frame the structure correctly. The sheathing top plates hold the corners together.

If you are framing a cathedral ceiling there are a couple ways to deal with the need for rafter ties. If you remove the ceiling joists its like removing the bottom leg of a triangle. The most common tension tie observed in roof framing for a conventionally framed gable roof is the ceiling joist that forms the bottom chord of the roof triangle shown below. Darren tracy pe owner of west branch engineering in saratoga springs n y responds.

And the roof covering material determines the size cross section area of the roofing timbers used. Rafter to ceiling joist. Table r802 4 1 ceiling joist spans for common lumber species uninhabitable attics without storage live load 10 psf l δ 240.