Good practice may well be not to supply DRA - nothing in the CDM regs requires supply of a discrete Designer Risk Assessment document.

Good practice would be a record demonstrating how the designers have discharged their duty to eliminate hazards where reasonably practicable and reduce risks remaining, alongside a robust method of communicating the significant and unusual residual hazards to people further along the project. The latter is probably not a DRA.

What is a generic risk within your plant/equipment (ie, a risk that applies to every item you produce) may still be an unusual risk to a general contractor, so it's possible that a document generic to your product is relevant, but if it's generic generic material, I agree, it's not wanted or useful.

Designer risk assessment? My sides are splitting here.

Ok, probably slightly unfair however, based on some of the installations that I've encountered in recent times many, many designers/installers give the square root of zero consideration to the H&S of those tasked with maintaining installed systems. Some installations are so perverse that I'd have to wonder if there was a competition to 'design' the least maintainable layout possible.

The design team should certainly hand over the information on residual risks, but as I said before - good practice in this respect would be a robust method of communicating the significant and unusual residual hazards to people further along the project, and this is probably not a DRA.

If it's simply work at height, I don't think that's an unusual residual hazard. Your designers probably need a record demonstrating why they still have valves etc at height and close to an edge, but I don't see why or how a document recording that a valve close to the edge is close to the edge and an operative is at risk helps those maintaining the equipment. Your designers need a document justifying the design to be able to demonstrate that they've discharged their duties, but that isn't something that needs handing over to those maintaining the plant. If you need to service a valve close to an unprotected edge, does it make it safer if you know why the valve is close to the edge?

If, however, the designers have incorporated something clever that lets the maintenance be done without going close to the edge, that should be documented and passed along, but again, I don't think that would look like a DRA, it would look like a maintenance manual.