Ceiling Joist Framing Ideas For L-Shaped Floor Plan Design
This video provides an informative overview on ceiling joist framing for this L-shaped floor plans in new home construction. Then dives into various aspects of ceiling joist framing, including:
Ceiling Joists and Rafters
The video begins by explaining the installation of ceiling joists and rafters. Ceiling joists are typically spaced 16 inches on center and are connected to rafters at each end. In the L-shaped floor plan, the garage rafters are sized at four feet on center and are attached to a rafter at each end. Additionally, they are connected to a gable stud, which is a vertical stud located at the end of the wall.
Then recommends using 2x8s for ceiling joists and 2x10s for rafters. These rafters are then connected to a beam with hangers. The beam itself sits on top of the wall and is supported by a post underneath it. In most cases, an additional footing is required to support the beam.
Rafter Ties and Straps
Rafter ties are crucial components that help to prevent the rafters from spreading outwards. Then emphasizes the need for rafter ties every four feet along the rafters.
These ties are typically straps or metal connectors that are nailed or screwed into the rafters.
Size Requirements for Different Components
Greg acknowledges that the size requirements for various components, such as ceiling joists and rafters, can vary depending on the specific application. The span of the room, the distance between the walls, and the bearing points all influence the size of the lumber needed. For instance, the video mentions that while 2x8s might be sufficient for ceiling joists in certain situations, an engineer might specify 2x10s for longer spans.
Access Hole for the Attic
It also covers the creation of an access hole for the attic. The size of the access hole depends on whether or not a forced air unit is present for central heating and air conditioning. If there is no forced air unit, a minimum size of 22.5 inches by 22.5 inches is recommended. However, if there is a forced air unit, a larger opening of 30 inches by 30 inches might be necessary to accommodate the unit.
Additional Information
Overall, this video offers a valuable introduction to ceiling joist framing for L-shaped floor plans. By explaining the installation of ceiling joists and rafters, beam placement, rafter tie requirements, and size variations for different components, then provides viewers with a solid foundation for understanding this aspect of home construction.
