Below are some usefull links for the steel & timber industry

Timber related

http://www.mitek.com.au/

http://www.miteksapphire.com.au/

http://www.ftmaaustralia.com.au/

http://www.pinetimberproducts.com.au/

http://www.tilling.com.au/

http://www.timber.org.au/

http://jameshardie.com.au/

Steel related

http://framecad.com/

http://www.nash.asn.au/nash/

http://www.onesteel.com/

http://www.roofmart.com.au/

http://www.zincalume.com.au/

http://www.jdsmetaldoorframe.com.au/