Room Area Minus Door Swing

[caleb.mitchell694426]

I've been asked to subtract the swing of a door from the area on a room schedule. I can't figure out a calculation that identifies a door from room schedule... then runs (pi*r^2)/4 on it. any ideas?

[jsteinhauer]

Hello,

Welcome to the forums. We will try and help.

I'm not sure why this is even a question. There are no standard that I can name (BOMA, AIA) for calculating room areas that subtract the door swing from the room. That being said, I would create an Integer Project Parameter and apply it to Rooms. In a working door schedule, I would add said parameter & group the doors by Room Number. Then manually add enter the number of doors to the new room parameter. In your room area schedule, have your Calculated Value parameter reference the door count room parameter.

What happens when you have a door that swings more than 90°? I would push back on this request, because to me it doesn't make sense.

Cheers,
Jeff S.

[Steve_Stafford]

It does sound like a pretty idiosyncratic request but I've seen a similar request that only floor area that isn't obscured by cabinets be counted as room area. That was for a school project, maybe this is too? Or perhaps it is just an academic problem...

Within Revit there isn't a way to combine a door schedule with a room schedule AND do some calculations that evaluate the size of a door or doors and then determine how much less area there is. However the rooms probably have a reasonably consistent door size selected. If so you can add columns to a room schedule that let you specify how many doors each room has and their total size. You can add a column that lets you provide the opening angle to decide how big the doors swing arc will be. Then a calculated parameter can deal with these columns in the formula, ultimately subtracting the door arc area from the room's calculated area. You just need to provide the information so the schedule can work through the rest. A room schedule can use an Embedded Schedule (doors) so you can at least see the doors assigned to the room and how big they are.

I also imagine that Dynamo (http://www.dynamobim.org) could be used to extract the information, calculate the area and then do the work so the results can be applied to a column in a room schedule, or some custom programming via the API directly.

[MikeJarosz]

Well, to an architect it is a peculiar request, but I've seen peculiar requests myself. When designing hospitals, there are rules about medical facilities that were written by medical authorities, not architects. I remember an odd rule for dialysis facilities that specified a minimum circulation space - i.e. the space left after deducting everything that sat on the floor.

Hospitals are regulated in NY State by a "Certificate of Need" that specifies exactly what could be included in a new hospital. The idea was to prevent an oversupply of profitable facilities like lithotrypsy in a city, while ignoring community needs such as alchohol abuse clinics. Those rules are written in Albany by layers and bureaucrats, sometimes even doctors, but rarely an architect.