Manual release controls for electronically secured doors

[hammer1]

Afternoon

We have a construction company stating that some of our electronically secure doors that are located on a means of escape do not require manual release controls (green break glass units) as they failsafe on fire alarm activation.

Is this in line with BS 7273 Part 4 requirements?

Many thanks

[William 29]

Er..nope

[hammer1]

Er..nope

Thought not... thanks for prompt reply.

[wee brian]

Just point them at the building regs - AD B covers this

[hammer1]

Just point them at the building regs - AD B covers this

They have stated only 2 of the 3 requirements need to be implemented in reference to ADB (section 5.11)?

[David Rooney]

Don't know where they get that from ....

5.11 basically says electronically locked doors should release on

a. fire condition
b. loss of power or
c. activation of a manual release unit.

There's no 2 out of 3 as far as I can see.

Re 7273-4 an emergency manual release is needed directly in line with the power to the locking mechanism in case the for whatever reason, the automated signal from the fire alarm should fail.

[Mike Buckley]

Wilful misreading of the document?

[David Rooney]

Probably ... it would also be interesting to hear their definition of "failsafe" as I suspect it will be different from the definition within 7273-4 ....

it would also be handy to know the 7273-4 category of each door .....