topic Re: DESIGN OCCUPANT LOAD in Collaboration with other software

DESIGN OCCUPANT LOAD

Steve Jepson — Wed, 12 May 2010 19:30:26 GMT

I would like to have a schedule for calculating the Design Occupant Load per area and dispaly the total of those areas.

I would prefer to use the areas extracted from zones on a certain layer but it could work with fills too.

Can such a schedule be made with ArchiCAD ?

area/300 + other area/100 + other area/500 = Total Design Ocupant Load

Something like that. Do I need ArchiQuant or what ever it's called ?

Re: DESIGN OCCUPANT LOAD

Anonymous — Wed, 12 May 2010 19:37:35 GMT

I am doing that in a zone stamp... It is taking the area and dividing by the occupant load. Then you can use a schedule and add all the loads per zone together. There is a zone in the depository that does this also.

Re: DESIGN OCCUPANT LOAD

Steve Jepson — Wed, 12 May 2010 19:38:58 GMT

Thanks.

Re: DESIGN OCCUPANT LOAD

Anonymous — Wed, 19 May 2010 17:35:21 GMT

I'm noticing that the zone stamps round the value of the occupant calculation down.

The building codes in many US states require the value to be rounded up. Any way to do this?

Re: DESIGN OCCUPANT LOAD

Anonymous — Wed, 19 May 2010 18:10:56 GMT

You can edit the zone stamp to fix this. Whever the calculation is being made for the occupants there is probably the use of the INT function which will take only the whole interger for the occupant load. For example if the claculation works out to 10.234 occupants, INT will return 10. It you replace the INT function with CEIL it will return 11.

Re: DESIGN OCCUPANT LOAD

Anonymous — Wed, 19 May 2010 20:08:37 GMT

Hm.
Here's the line, I took out ROUND_INT and replaced it with CEIL

occLoad = STR (CEIL((net_area_val/SqFtPerson)-0.5),1,0)

In a room that is 1,627 sq ft, at 100 sq ft per occupant, the load is being returned as 16, not 17 as is required by code.

Re: DESIGN OCCUPANT LOAD

Anonymous — Wed, 19 May 2010 20:18:42 GMT

StaceyS wrote:
occLoad = STR (CEIL((net_area_val/SqFtPerson)-0.5),1,0)

Try this instead: occLoad = STR (CEIL(net_area_val/SqFtPerson),1,0)

I'm not sure why the .5 was being subtracted from the calculation, but that was changing the value from 16.27 (which with the CEIL would return 17) to 15.77 (which with the CEIL would return 16)

Re: DESIGN OCCUPANT LOAD

Anonymous — Wed, 19 May 2010 22:00:37 GMT

That did it. Thank you!

Re: DESIGN OCCUPANT LOAD

Anonymous — Mon, 20 Jun 2011 20:00:12 GMT

was this tag ever perfected? if so can you share? I need the same type of tag and haven't learned GDL yet... still early in the move from Revit and Adesk.

Re: DESIGN OCCUPANT LOAD

Anonymous — Wed, 06 Jun 2018 16:56:44 GMT

Anyone have more recent information on how to do this in AC20? Can't find this line of code in the Zone 20 script!

Re: DESIGN OCCUPANT LOAD

vfrontiers — Wed, 31 Aug 2022 00:51:44 GMT

For various reasons, I'm trying to achieve the same thing using properties. I keep running into a snag where the EXPRESSION calculator has no way of knowing that my 100 is PEOPLE / SF and says that my expression should equal an AREA instead of Number...

Any help appreciated..

Re: DESIGN OCCUPANT LOAD

Stuart Smith — Wed, 31 Aug 2022 16:49:36 GMT

Duane,

Here is the expression we use

(can't copy and paste for some reason)

'Occupant Load' is another property (number) derived from the list of Space Functions

Re: DESIGN OCCUPANT LOAD

vfrontiers — Fri, 02 Sep 2022 16:07:17 GMT

Stuart,

Thanks for the response... I went a slightly different route, but looks like yours might work better... I had to dumb the result into TEXT in order to acheive the UNITS I needed... looks like your version keeps everything as a number...

Does your SPACE FUNCTION list contain a bunch of IF/ THENs? to get LOAD related to the SPACE? or do you have a different method for that?

Re: DESIGN OCCUPANT LOAD

Stuart Smith — Fri, 02 Sep 2022 18:52:10 GMT

The Space Function property is an Option Set with all the space functions as listed in the IBC

The Occupant Load property derives the numeric value from the selected Space Function property using STRTONUM (string to number):

All the user has to to do is select the appropriate space function from the list and the Occ load gets calculated automatically for that zone.

Re: DESIGN OCCUPANT LOAD

vfrontiers — Tue, 06 Sep 2022 14:29:48 GMT

Nicely Done!