On Thursday, June 6, 2019 at 9:24:33 AM UTC+1, Davidm wrote:
On Thu, 06 Jun 2019 08:13:38 +0100, Chris Hogg wrote:

On Thu, 6 Jun 2019 07:51:40 +0100, "Jim GM4DHJ ..."
wrote:

this new motorised roller shutter doesn't seem to have a lock...is that OK ?

Are you talking garage door? If so, nor does mine. It relies on it not
being possible to raise it other than by coiling it back up onto its
axle, either electrically using the remote controller or with the hand
crank inside the garage if the electrics should fail. I asked about
security before I had it installed, and the guy said it was very
secure (BHWSTWH).
Out of curiosity - what happens if you're not in the garage, the power
fails with the door closed, and you have no other entrance into the
garage?

Simple. All of these doors have a simpe way of disconnecting the gearbox and then the door can be rolled up by hand