Presumably access is actually identified as necessary by the local Fire Brigade/FRA. There are many premises with no "direct" access, appliances etc. access from the main road.

Just a bit more info:

Yep, this unusual building does require access for fire appliances (as determined by the/my FRA)

The roadway is < 3.6m wide, before the bend, with no way to cut the corner (without quite a few £££££s being spent).

It is possible to lay hose from the street (insofar as anything is possible), but the delay in commencing fire service operations (including rescues & establishing water supplies) is assessed as unacceptable.

This building is a high fire risk, in terms that it low likelihood of fire, but hugely significant consequences to the customer if a severe fire is allowed to develop.

There has been some serious cash spent on fire safety control measures here, but a sprinkler or water mist system is financially out of the running.

It would be much cheaper - and assist the customer's general business operation - if the access was widened, but they need convincing to part with the cash

There is good fire cover locally with the ability to get fairly large resources (8 pumps) en scene within 15 minutes. Trouble is, when they get there, they can't get anywhere near the building!!

So, any idea how to measure turning circles??

I read with interest your issue regarding fire appliance access. What needs to be considered is the differing types of appliances... pump (fire appliance) - Ariels such as turntable ladders / Ariel ladder platforms / Turntable ladders- Specialist appliances, Hose layer lorry etc. All of these are of differing dimensions and dependant on manufacture I would envisage differing turning circles (tbc). Have you considered contacting the local fire service either via the station or area BHQ? They would I am sure be only to helpful to assist you with what the PDA (pre determined attendance) would be to the location and perhaps physically bring an appliance and crew to the location to check out your issues. I hope this is of help.

No chance of getting a Bronto down there

15 minutes to attendance, what is time to fire detection, method and time to call out?

How many hose lengths from entry of lane to building structure? Response would be likely to be defensive in any case regardless of ability of access of appliance.

I would look at fire growth characteristics of Squared fire vs response time of appliance to scene compared to response time to entrance and bringing branch to scene.

What is the difference between the two response times, would flashover take place before either response times i.e. in the event of either medium, fast or ultra fast fires.

irrespective of either response time, what is the effect of confinement via compartmentation?

Bleve: These turning circle figures are indeed those I was referring to at the beginning of my post. I am obliged for the formula, but I am still unsure how to apply it practically when all I have is a curve in a narrow access point to take measurements from.

I have no idea of the figures associated with the 'track', 'wheelbase' or 'average steer angle', as I am trying to implement those minimal dimensions in ADB, and have no specific vehicle to take measurements from.

As the advice re access dimensions is recorded in ADB, surely there must be method to measure existing conditions (a tight curve in a narrow roadway) to justify changes to current arrangements?

Changes to the access (that I will be advising) will cost many £thousands to achieve and customer will want reference to an accepted benchmark standard before he spends a penny. However, I also want to refer the customer to the ADB table AND show him how the dimensions vary to what he has in place now.(Thereby justifying my advice)

Pearcebuff. Your suggestion of asking for an aplliance to check would usually be valid, but if non LGV dustcarts (designed to access alleys at the rear of shops) struggles, there's no way a major pump will squeeze through.

In addition, have scraped & bumped enough fire appliances in my time(always on the officer in charge's side of course!) to know the only way a pump would gain access to this site is if it got a lift from a Chinook

Now there's an idea :)

Near side kerb/corner should have radius of 9.6 metres with road width 3.2 metre wide to accommodate body + overhang.

You could take a look at your site/entry on Google earth.

From description, reckon you are looking at running couple of branches from entry to building.