I am planning to do some decking (not the decking with fists lol). It will be laid on existing slabs, the size im planning for is 8 metres by 4 metres. With the frame, how far apart do i place the support beams and noggins (i think thats what they are called). Also ive been looking on websites and they mention "joists" is that another word for the support beams? As you can tell amateur DIYer.

If you have any other advice, even if its not relating to this question, please leave aswer.