Unless you have a finished attic the ceiling joists are typically exposed.
Decorative wood between floor joists ceiling.
Owt ornamental wood ties ironwood 6 in.
Adjustable galvanized steel joist hanger tab 6 piece per box.
Floor live load of 40 psf between the kneewalls.
You may need to lift insulation or plywood to see the joists.
Attic and floor dead load of 10 psf.
Floor covering is the aptest description since everything below the substrate can be considered the real floor in terms of structure and permanence.
Ceiling board allows you to heat your room far more efficiently.
Ceiling drywall hides the unpainted unfinished wood of joists beams or the floorboards supported by the beams plus a lot of other junk detailed below.
Bonus room floor joist selection guide.
You would be able to check if this is the case in your home by going up into the attic.
Generally floor or ceiling joists run parallel to the rafters.
Lower ceilings shrink the volume of the room to be heated.
In general floor planks should be installed perpendicular to the ceiling joists although the presence of a plywood sub ceiling or a layer of perpendicular furring strips will allow you to install parallel to the joists.
For other conditions including holes use fastbeam software or call georgia pacific at 877 437 9759.
For finished ceilings first disconnect the electricity and remove all light fixtures and other obstacles.