Roof Joists Or Rafters

Rafter ties help tie the roof rafters together structurally eliminating the need for ceiling joists.

Roof joists or rafters.

There is no difference in the quality of roofing provided by both. Similarly ceiling joists are the planks of wood that create the flat surface of your attic floor or top story ceiling. A pair of rafters is called a couple. Roof rafters are lengthy planks that support the roof sheathing.

Building with them is known as stick framing. Rafters form the foundation for attachment of the roof boards onto which the final roof covering is fixed. This means that each rafter is built on the job site using dimensional lumber. They are important load bearing structural elements that hold up both the weight of the ceiling materials for the floor below as well as the weight of any objects or people that may be housed within.

From the quality point of view both rafters as well as trusses are equally good. Rafters are roof beams that slope from the ridge beam to the top of the wall and have been used since older times. Rafters are the building components that run diagonally from the wall plate to the apex of a roof structure. A rafter is one of a series of sloped structural members that extend from the ridge or hip to the wall plate downslope perimeter or eave and that are designed to support the roof deck and its associated loads.

Ceiling joists can be on both low sloped roofs and high sloped roofs and help to prevent racking and spreading of your rafters or walls which could lead to sagging. In traditional timber they are nominally 2 inches thick and typically 8 to 10 inches wide. In home construction rafters are normally made of wood. Roof rafters don t need to be parallel to ceiling joists when rafter ties are used.