To which doors does D2.20(b) apply?

2017 NCC Information Seminars

The 2017 NCC Information Seminars included a presentation on ‘To which doors does D2.20(b) apply’ as part 2 of the 13 part BCA sessions delivered throughout February and March 2017.

Transcript

To which doors does D2.20(b) apply?

This is the provision which requires particular doors to swing in the direction of egress, and the intent is to ensure that should crowding occur at the door....

When there's crowding, it's hard to pull the door towards you.

Swinging it away into the direction of egress allows people to get out.

And people would be aware that there's been some horrible tragedies on account of swinging doors.

So, using the same floor plate, which doors here must swing in the direction of egress?

We've got the actual exits.

I'm sure we all agree that these must swing in the direction of egress when we get into the exit here, and also this door in a required exit.

What about this door?

We've had a bit of interest in this door, our secure door.

It's capturing a fair bit of space and it could be quite likely that people traveling through there in order to access the fire isolated passageway.

Does this door need to comply with D2.20 and swing in the direction of egress?

Anyone brave enough? Any nods for yes?

Or shake their head for no?

Who's just waiting to see what this guy at the front says because I don't want to get this wrong and get embarrassed.

That's what everyone is doing.

We're all waiting for the answer aren't we?

We've got to know. It doesn't have to.

Thank you. Very brave, Sir.

Any yes' in the room? We've got a yes.

Okay, what's the answer?

Let's have a look at the actual provision shall we.

D2.20. When we look at the text of the provision, we're seeing that it's very similar to D2.21, the provision we just looked at, except it only applies to two types of doors.

Doors in a required exit or doors forming part of a required exit.

We don't talk about doors that are in the path of travel to a required exit.

We're only capturing the first two.

In a required exit or forming part of a required exit, those doors which have something to do with an exit.

These are the only types of doors which have to swing in the direction of egress.

And the door in the hallway is neither of these.

It's only the door which is in the path of travel to a required exit.

So this is okay under the Deemed-to-Satisfy provisions of the National Construction Code.

So thank you very much for your bravery, Sir with the yes, but it doesn't have to.

I see a hand up over here.

I will take questions in a moment.

Just give me one slide please, Sir.

We have to keep in mind there's a few other provisions which apply to swinging doors besides D2.20.

So again, on Specification C3.4, on the screen here.

So when you have your smoke walls and a smoke door in your smoke walls.

This is in your hospitals, age cares and your corridors more than 40 meters in accordance with

C2.14 in your Class 2s and 3s.

They have to go in both directions or in the direction of egress.

We've also got G4.3(a) in alpine areas where the actual exit has to come in because there could be snow built up outside.

We've got some concessions in Part H3 for farm buildings and farm sheds, and also D3, we've mentioned before.

It might be that you need to take into account door swing for circulation spaces under AS 1428.1

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