So architects draw stuff and then get that stuff built. One of the key bits that some may not realise is that one of the biggest (and most important jobs) the architect does is in checking the building materials.
Below is a photograph from a site visit today of the stamp on a piece of structural timber (its from the roof rafter on a flat roof). Besides it being stamped (essential) and it being the right size (9″ x 2″ which it was); I also need to check the grade of wood is as specified which in this case was C16. I’m not going to go into massive detail regarding wood strength and grading, for that CLICK HERE for the excellent site ‘Wood Spec’ (the website managed by COFORD, the National Council for Forest Research and Development.)
If you look carefully, you can see the C16 stamp on the right hand side. Pass.
This is one of the reasons to employ an architect. He/She are paid to firstly know what the specification should be and then secondly to check the right specification is being built.