A typical conditions for timber framing?

I spend at least most of the year in a climate with intense heat and high relative humidity. The timber resources don't look like the ones I typically see in timber framing movies or online discussions. I therefore wonder the following:

Is there a required minimum size for timbers that goes beyond what engineering would potentially determine?

How should durability problems caused by bio agent attacks be handled? Termites are a problem, and because of the environment, fungus is also widespread.

rony, welcome to the forum.

I feel that the size of the timber used would depend on several things.

What are you building?

A typical conditions for timber framing you will be building in?

What type of timber are you using?

What Kind of roof will this building have?