Basic concept, stay within the perimeters of type V construction to keep costs down and to construct a building as cheaply as possible for a 30 to 40 year life span.....(my house is 100 years old but major reconstruction has been performed over the past few years).
Type IV is used to match mill construction conversions to lofts or for churches primarily
Type III B is usually a butler metal building
Type II is steel stud, drywall, and may incorporate masonry block and steel frame
Type I is either masonry block with fill, poured in placed concrete, or steel framing with spray on fire proofing - generally large assemblies and high rises.
Remember, Very Basic Rule of Thumb expressed above (My opinion only as yours may differ) -- Just remember that any construction type can be classified as type V construction as long as you meet the limitations of the code. This was done several times in a metal butler building when the price of steel studs skyrocketed a few years ago and the owners wanted to use wood framing in a non-combustible building.
Others may feel free to chime in or correct any falsehoods created by this post --- Best of all radio atlas - this is a very informative board with great resources with a broad range of designers, code officials, contractors, inspectors, etc.... -
Just be sure to roll with any responses as we all have off days and may vent at the wrong person at the wrong time.... I have been guilty of it and also have been on the receiving end as well. I will say that my status pretty much sums it up (the board) for me.
Thank you for becoming a member and look forward to seeing you on here in the future.