Timber is an accepted building material so if properly spec'd and installed can't see there being any issues in theory. However whether it's suitable for the intended use of the building is a totally different question.
As counter intuitive as it seems, you're often safer in a wooden structure than steel.
The wood - until you're down to silly little sections- will char, and take some time to burn through to the point of structural failure*, whereas steel that's near to it's max load gets hot, and goes all bendy!
*not relevant to this question, but oak frames are astonishing in this...they can takes hours to burn through to the point of failing.
Can I use wooden purlins on a building that has been designed and made for industrial purlins?
Answer is yes I used 1000mm long 10mm plates to span the joints pre drilled to match the cleats with a hole either end to put a bolt through and strengthen the roof and prevent sag.
Can I use wooden purlins in an industrial project?
Depends what the architect/engineer says