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Door openings

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Community Veteran
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Re: Door openings

I bet no-one knows why very tall buildings tend to have revolving doors at ground level instead of normal ones! (Tip - I do!) Wink

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Anonymous
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Re: Door openings

@nozzer - Well you've just lost your bet, as you know the answer. Grin

All the same, an interesting one, are these revolving door mandatory?

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Aspiring Hero
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Re: Door openings

@nozzer

It is definitely not to do with keeping horses out. Smiley

It is energy efficiency and increased foot traffic flow.

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Re: Door openings


@Anonymous wrote:

@nozzer - Well you've just lost your bet, as you know the answer. Grin

All the same, an interesting one, are these revolving door mandatory?


It depends on what the buildings internal arrangement is like from the point of view of keeping the building fairly airtight.

@SpendLessTime It's a safety concern rather than efficiency.

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Re: Door openings

Because the air temperature (air conditioning) inside remains constant rather than being cooled/heated by the air outside. A properly designed revolving door is actually never open to the outside elements. For safety reasons many are designed to fold back the doors in the case of being used as an emergency exit.

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When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
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Re: Door openings

@petlew

You're getting there. It's to do with the lift (elevator Smiley).

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Re: Door openings

Clue...   in a normal building many internal doors can be fixed open, but they should be on a magnetic catch so that if there is a fire alarm the doors automatically swing closed.

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Re: Door openings

If you don't want to know, look away now!...................

As @petlew says, a properly designed revolving door is actually never open to the outside elements. That obviously means that large amounts of fresh air can't get into the building. The lift(s) ride in a shaft, which is a wonderful chimney. A fire on the ground floor or thereabouts would just love a nice chimney to roar up. That is reduced dramatically by having a set of entrance doors which can't be left open. So the tendency for the building and lives to be lost is much reduced.

A nice man in the Empire State told me that. Cheesy

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Re: Door openings

Just a thought.

Would outward opening external doors be an advantage in areas liable to flooding.

With the doors closed and a flood in progress the weight of water against the door would press it tighter against the frame helping to keep out the flood.

The opposite could occur with inward opening doors.

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Community Veteran
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Registered: ‎02-08-2007

Re: Door openings

Amazing number of responses to the original question.

Now, sliding doors. There must be a question linked to that but I can't think of one.

Smiley

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Aspiring Legend
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Re: Door openings

Funny

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Community Veteran
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Re: Door openings


@gleneagles wrote:

Amazing number of responses to the original question.

Now, sliding doors. There must be a question linked to that but I can't think of one.

Smiley


Er hem.  Can you fit sliding doors to an ice rink?

Community Veteran
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Re: Door openings

Thumbs_Up

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Community Veteran
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Re: Door openings


@gleneagles wrote:

I guess your front and back door open inwards


Our old neighbours door opened outwards.. and it was a modern house with the PVC type door.

I guess it's handy if you get an unwanted caller.. you can open it and then give the door a bash to send them flying Cheesy

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Aspiring Hero
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Re: Door openings

@PeterLoftus  Will your French doors have to leave the country upon Brexit, or will you have to apply for a work permit for them after proving that you tried to get British doors but none was interested?