Rank: Super forum user 
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Something I've not really thought about until a door snapped shut as I reached for it ....!
I've just stopped and played with several doors (Office and corridor) to see how they shut on the spring loaded closures. Basically from fully open they move relatively slowly then "snap" shut over the last 10 to 15cm of movement. Is this normal? Now that I think about it surely the last few inches should be slow so you can get your fingers out of the way. Just curious really as I think the slow then fast is actually the normal way round. If so, why?
Thanks,
Curious Jim
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Rank: Super forum user 
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Hi, yes that is absolutely normal, the last 10 to 15cm is the latching close, without that the door wouldn't close against a latch. That is how door closers work, they can be adjusted to give a soft close where there is no latching requirement or you don't want doors to bang shut, but if there is a latch then you need that last bit of oomph for the door to shut properly.
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 1 user thanked Hsquared14 for this useful post.
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Rank: Super forum user
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There you go, every day's a learning day,
Thanks,
Slightly more knowledgable Jim
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Rank: Super forum user
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The real issue with this type of closer is that they require greater than 20 newtons to start the opening process and this actually contravenes the accessibility requirements under the Building Regs. However most Building Control organisations do not follow this requirement - unfortunately for the frail and disabled.
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Rank: Super forum user
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Sorry to bump this but one should really wonder why a snib catch is necessary when a door is closed to a rebate with a door closer. The closer will keep it closed and locks can also still be used without the snib.
Edited by user 12 May 2018 20:50:05(UTC)
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