Non-fire rated lock in fire doors

O

opps

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I need to fit a lock that doesn't have a sufficient fire rating into a FD door. The door frame doesn't have enough depth to fit a regular night latch. So I sourced one of the only two self locking mortice locks that I could find. After the customer ordered the product, I looked at the installation guide. It is there that they say that it is not suitable for FD doors.

Can I slide graphite shims in to the gap either side of the fitting. The lock requires a 19mm gap. My Souber DBB has an additional 22mm cutter. I am hoping that I can slide in shims either side of the lock.

From what I have read, it seems to be possible to do that, but I would appreciate advice from someone that knows more than I do. Tnx
 
I'm on a fire door course ATM. I don't know the answer but I will next week. When do you need to know?
 
I gather you want a mortise lock with nightlatch action?

Would an Imperial G7008 do?

There may be a Wellington but they often have aluminium parts.

A 3R35 is rather expensive

I saw what looked like a Union 2332 on a hotel front door last week. Knob action from the inside as an escape lock and it had a forend snib for daytime use, which caught my eye as not often seen.

There are a few others on https://www.ironmongerydirect.co.uk/search/filter/ironmongery_type>{mortice20nightlatch}?query=nightlatch
 
I'll look later today if I get chance. See if it mentioned in book
 
Notch7 said:
:oops:

dats a bargain
Click to expand...

Yeah, not cheap...

Initially she purchased two Yale type night latches. Then discovered that the builder had only left a tiny bit of door liner proud of the wall- ruling out the lock on one of the two doors in question. Given that the doors are adjacent to each other, she has decided to pay more so that both doors look similar.
 
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