This guideline has benefitted from the support and vision of TIJ, together with the knowledge and experience of experts on the design of physical environment. The ideas and recommendations presented in this guideline are not meant to limit or exclude other approaches which may be more appropriate in other contexts or situations. In addition, it should be pointed out that illustrations in the guideline are simply there to illustrate our ideas and suggestions. They are not meant to be used as a literal design plan for construction work.