Where do designers draw the line at disclosing information? The equipment we designed and installed is now causing problems with other supplier's equipment downstream. We have supplied all our usual information regarding our equipment but not information on this output. We were unaware that the output was critical. I have referred back to the CDM regs and am looking at the part where information for the health and safety file must be agreed at an early stage. Who ultimately decides what information is required for the health and safety fle?

Designers have an obligation under CDM to ensure all safety aspects are 'designed out' at this stage, wherever possible.

Firstly CDM (amongst other matters ) should ensure clear means of co-ordination, communication,& co-operation full all persons involved in the project, and with that in mind Reg 10 CDM2007 places a duty on to the client to ensure that all the information in his possession relevant to the project is provided promptly to the designers (via the CDM-C ) Secondly CDM2007 places no duty on the designers to provide information on design risk assessments or details of residual risks that a competent person should be aware of, however there is a duty to pass on information from design risk management that identifies residual risks (and control measures) that other designers need to be aware of or that competent persons may not be aware of. Thirdly CDM2007 specifically seeks to put ownership on to identified hazards and hazardous activities where they cannot be eliminated to ensure that the risk is suitably controlled. I suggest that designers on this project need to communicate with each other and that the CDM-C should fulfil his duty by ensuring that all parties are co-operating.