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Exterior Deck

LGreene

Registered User
Joined
Oct 20, 2009
Messages
1,126
Location
San Miguel de Allende, Mexico
I was contacted about an antique barn that has been repurposed as an event space. The calculated occupant load of the barn is 140 people based on the unconcentrated assembly occupant load factor and I will verify that they have at least 2 egress doors with panic hardware.

Here's the question for you. There is a 3,000-SF deck attached to the barn, which has its own exits to grade (it's 1 story up). The local fire department is saying that the deck does not increase the allowable occupant load of the total event space, because people on the deck might enter the barn during inclement weather, thereby increasing the number of people in the barn above 140.

I have never heard of this. I would have expected the barn and the deck to have two separate occupant loads, since each has its own means of egress. I also thought that the calculated occupant load was used for determining the required amount of egress width, the number of plumbing fixtures, etc. I didn't think the purpose was to establish the maximum number of occupants that the barn could hold. And if the fire department is trying to come up with that number, why not use the concentrated use factor and then check to make sure the barn has the means to support that number of people?

Can you help educate me?
 

fatboy

Administrator
Joined
Oct 17, 2009
Messages
6,265
Location
Northern CO
This may help;


1004.2.1 Intervening spaces or accessory areas. Where

occupants egress from one or more rooms, areas or spaces

through others, the design occupant load shall be the combined

occupant load of interconnected accessory or intervening

spaces. Design of egress path capacity shall be

based on the cumulative portion of occupant loads of all

rooms, areas or spaces to that point along the path of

egress travel.
 

cda

Sawhorse 123
Joined
Oct 19, 2009
Messages
20,358
Location
Basement
As long as the deck has two code complying exits,,, it should stand alone.

Now if say one exit is back into the building, that is where exiting needs to be looked at.
 

ADAguy

Sawhorse
Joined
Sep 11, 2013
Messages
5,862
Location
California
If the barn exits are at grade vs the deck being above grade then you may have an argument for them being separate occupancies but then the deck may not be accessible and "that" is another issue.
 

JPohling

Sawhorse
Joined
Aug 16, 2011
Messages
1,250
Location
San Diego
As long as both spaces have compliant exiting you should be fine.
I would be more concerned about increased live load requirements on the floors for this new assembly occupancy.
 

Pcinspector1

Platinum Member
Joined
Oct 28, 2009
Messages
3,620
Location
MID WEST
The local fire department is saying that the deck does not increase the allowable occupant load of the total event space, because people on the deck might enter the barn during inclement weather, thereby increasing the number of people in the barn above 140.

Confused:confused:

Does toilet counts and ADA access to the deck come into play?
 

LGreene

Registered User
Joined
Oct 20, 2009
Messages
1,126
Location
San Miguel de Allende, Mexico
Confused:confused:

Do toilet counts and ADA access to the deck come into play?

That's a great question! I'm guessing that the accessible entrance/exit is through the building and the bathrooms are inside. Would that mean that the allowable occupant load for the barn + deck is equal to the occupant load of the barn, with no additional occupants for the deck?
 
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