Teknisk tegning til terrasse

Sorry for english, bad Canadian here. Planning to build a larger terrasse on the side of our house and need help to get drawings that i can submit to bærum kommune. Have spoken with neighbors, so that is ok. Simple square terasse with 2 steps. The reason i need help is that is is bigger then 50m squared and part will be 2 metres high so supports need to be placed in the ground. Will build the terasse myself (have built 3). From the image, will expand the existing terrasse out just over 2 metres.