Pesado when it comes to ser and estar?

Pesado when it comes to ser and estar?
 

I am from South Texas I have always said la caja esta pesada(the box is heavy) no es

and el hielo esta pesado instead of es(ser), This is the way I was taught, is incorrect?

"es pesada" is an assertion about the box
"está pesada" is an opinion or you simply are saying that the box is (too) heavy for you. Once you have moved the box, it still "es pesada" but no longer "está pesada".

wow, this is weird for me

no la caja esta vacia means the box is empty, then why cant I use esta pesada too?

if "la caja está llena de esto" or "llena de lo otro", the box itself has changed?

is estar used with pesado like described in the photos?
http://nazagenia.files.wordpress.com...08/pesadas.jpghttp://nazagenia.files.wordpress.com...aja-pesada.png

En la segunda foto la caja pesa mucho.
(La primera no la entiendo)

We have a real problem here pose by your approach to the subject. Do you think "it's cold" because your teeth are chattering? You don't go swapping "ser" and "estar" constantly because you're carrying the box or you are laying it on the floor. Either the box es pesada from a standard point of view or you subjectively declare está pesada (para mí; me resulta pesada) like the penguin as its sweat drops are telling in the drawing. You may use correctly estar regarding to a box in a lot of situation but I see no point in exploring them if a) you don't know well the differences between ser and estar, or b) you have acquire a folksy way to use it, from humble origins, reserved to family, friends, and pretty much the private part of life, with that way being as respectable as any other way but pretty scope-limited and strongly based on instinctive and practical epistemologies.