Learning how to frame a house includes picking the right lumber for the job. Most people will want to pick pine, spruce, or fir for the framing. These types of lumber are affordable and produce sturdy framing for structures. Look for kiln-dried lumber to reduce the risk of shrinkage or insect damage after installation. As part of what’s included in framing a house when you hire a professional, the contractor should order the lumber, so you don’t have to worry about finding the right lumber.

In framing, studs are placed at 16-inch intervals to coincide with the typical spacing of wall materials such as drywall or plywood. This spacing is called "on-center" and is necessary for maintaining structural stability and efficient use of materials. The 16-inch spacing also helps to distribute the weight evenly across the building's structure. For those looking to cut material costs and improve energy efficiency, 24-inch stud spacing can be employed through a method called "advanced framing". This requires careful planning and adherence to local building codes to ensure structural integrity.

Yes, ceiling joists are typically load-bearing. However, their primary function is to support the weight of the ceiling and loads applied to it, like lighting fixtures and ceiling fans. They can also help support the roof, especially if they’re part of truss systems. Remember, the load-bearing capacity of ceiling joists depends on the material, size, and space between them. 

Removing a load-bearing wall affects the structural integrity of your home, so you’ll need a permit before starting the work. Building codes vary by municipality, and obtaining a permit and having the work inspected after completion will ensure you’re in compliance with all applicable regulations.