1. Steel Construction Manual;Achulitz,2000
2. Structural Steel Design: a Practice-oriented Approach;Aghayere,2009
3. Steel vs. concrete frame: the impact of resent price rises;Andrews;Econ. Bull.,2004
4. Environmental Pollution Control Act (1999);Attorney General's Chambers,2014
5. Code of Practice on Buildability;BCA,2011