White wood
Primarily as a beam to support a board or wood so it can be sawed.
A flush beam is a beam that is flush the the surrounding floor or ceiling joists. Often held in place with metal connectors. It could be a steel 'I' beam, lvl, built up wood. It is used when ceiling height is needed to be maintained.
Shims are flat pieces of metal or wood that are used to adjust for any height differences between the piers and their contact with the desired height of the beam.
That will depend on the distance between the points where the beam is supported, as well as the type of wood.
No only wood
it is a 4 in wood beam that gymnasts tumble on and u you want to stay on
That is not a simple anwer. It depends on the roof design and how many, and where the load points are, and the material of the beam(wood, metal, composite). See a structural engineer.
The wood will cast a shadow, as the light can not pass through wood.
The majority of these cabinets would use a hardwood veneer material and then a durable stain-proof white paint with a buffer. This wood can also be used in tables, chairs, and desktops.
16" on center
The beam is a narrow beam of covered wood set a few feet off the floor. You do basically everything you do on floor on it, but in a more limited area.