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Forums >> Revit Building >> Technical Support >> Formulas and Schedules
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Joined: Wed, Jun 13, 2007
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This seems very simple, but I can't make it work. I have a room schedule created and I'm attempting to generate occupancy loads. I created a new field "Occupancy Load," and "Load Factor" and then I've tried to add a calculated value in which the formula is... Occupancy Load = Area / Load Factor I'm using "Area" as defined by my room tag and "Load Factor" as an input (defined by the building code, ex. 100) I keep getting the same error message - "inconsistent units," even when I make sure that the type of parameter is consistent for both "Occupancy Load" and "Load Factor." I appreciate if anyone has any input on this. Thanks!
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Joined: Mon, Jul 4, 2005
137 Posts
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Just a shot here but what "units" of measurement did you define your occupancy load to have in your parameter data 'type'. It may have to match whatever the area definition is, e.g. Length, Number, Area, Integer, etc..
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Joined: Mon, Mar 20, 2006
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I think DGodfrey is on the right track. Our Occupancy Schedule is set up with the Load Factor as an "Area" parameter. Area is an "Area" by default. Then we make a parameter called "Occupancy Load" that is a "Number" paramter (so it generates integers by rounding) and use the following formula: Area / Load Factor + 0.4999 That last bit is important. The calculation will make fractions of people and the "Number" parameter will round to the nearest person. By code, fractions of people count as a whole. Example, a 210 sf room with a 100 sf/person load should report 3 people, not 2. By adding half a person, it forces the calculation to round up fractions of people...3.2 people become 3.7 people and rounds to 4...2.7 people become 3.2 people and correctly rounds down to 3. You'll notice we use 0.4999 people. That is to account for evenly divisible rooms. If you have an exactly 200 sf room with 100 sf/person, it will calculate to 2 and if you were to add .5 (instead of .4999) then it would become 2.5 and then round to 3. Hope this helps.
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