To give a little more information on this matter. I run a construction company that erects prefabricated (frameless) steel buildings. I have been asked by the main contractor for torque certificates for the bolts in the building. Now, this building has 12,500 bolts in it and unlike a portal frame building does not rely on a small number of bolts to hold the framework together. In all the years I have been working for this company I have never been asked for this certificate. I have spoken to a structural engineer who has said that our kind of building does not require this and that torque certs and seldon asked for these days anyway.

The manufacturer of the building give a minimum and maximum torque value for the bolts used in the building and we are within these values. We have carried out random tests on a small percentage of the bolts using a torque wrench and sent the results to the manufacturer who have confirmed that these values are expectable. My question is, under CDM, am I required to provide these certificates or do I just have to satisfy myself/my company that we have met these valves? We have worked all over the world and for some very large companies (power, water, defence and local authorities etc) and like I have said before, never been asked for this information regarding these torque certificates, so I just needed to know what is expected of us so that I know for the future.

12, 500 bolts, eh? You'd be cheaper forking out for a certificate/declaration from your structural engineer contact. Maybe ask if your client would find that acceptable alternative - perhaps they're only looking for some assurance?