Hi, I am looking for some clear guidance on the size of these signs in a new very large open plan office. I am aware of BS5499-1, but in a new office installation the sings fitted at ceiling level appear to be less than a 3rd of the size of standard signs that I have seen anywhere else. Apparently they have been passed by building control and the person who carried out the FRA. The property team have stated that although they are much smaller, because they are illuminated they are acceptable, I still do not think they are acceptable and question whether a DDA angle would see them as unacceptable. Any idea where the acceptability of the size of signage is clearly defined?

there a 3 aspects : 1: Guides etc including the building regs, various Brit-Standards etc 2: Risk assessment 3: A combination of 1 and 2 I find that the vast vast majority of designers, CDMC's, specifiers, procurers, clients and others of that ilk hide behind the various guides etc that are around except, that is, the part of the guide [or even the law] that says undertake a RA as well. This is because its much easier to do what the 'book' says, as you have a written reference to use and justify against if somebody asks a question where its much harder to justify using the RA as your ref. Additionally you get medal's for pretty design but not necessarily for having large fire signs standing out! This is probably another CDM 'gap' where the day 2 day H&S adviser has not been involved as they should be in the design and build the BS is a guide and DDA etc must also be considered; as just putting in a sign is not good enough as if people cannot easily see it!

The risk assessment should also consider visibility in smoke :) Amazing that directional information (signage) and emergency lighting is still being positioned at ceiling level.

Just a note to say thanks for the advice offered, much appreciated.