If I am understanding well you are going to start a construction project in Brussels. If it is so you need to go through the Directives related to construction. However if you visit the EU Bookshop Site there are publications that can guide you through the process. For example there is a publication that guides step by step on how to produce a H&S plan according to the directives. The site has further publication of non binding guides which are very useful for these kind of projects that are to be executed on the continent.

see this link - http://www.hse.gov.uk/org/belgium.htm

this is the link to the EU Book shop - http://bookshop.europa.eu/en/home/

hope this helps