Below is the link to BUILDING CONTRUCTION AUTHORITY (BCA)
you can download the PDF for The Code of Practice on Buildable Design
on this website: http://www.bca.gov.sg/BuildableDesign/buildable_design_codes.html
OR, you can take a look for "CODE OF PRACTIVE ON BUILDING DESIGN 2000"
OR, you can take a look for "CODE OF PRACTIVE ON BUILDING DESIGN 2002"
OR, you can take a look for "CODE OF PRACTIVE ON BUILDING DESIGN 2004"
OR, you can take a look for "CODE OF PRACTIVE ON BUILDING DESIGN 2005"