Installing roof trusses

Here is an excellent resource that gives you a brief on how to install pre-fabricated roof trusses.

http://www.itc-sa.org/

Know more about timber frame building in South Africa

For all those interested in timber frame building, I would recommend that you have a look at http://www.satimberhomes.co.za/  The team at SA Timber Homes also offer a timber frame building course at a very reasonable price.  They are highly recommended.