Doug_N

Does anyone know why rounding in Ruby acts like this? 3.4000....4 certainly shouldn't round to 4.08

This has been a most informative thread, thank you Glenn, Scott and Rene.

Those are actually created by CA when you move the windows around. I think they are related to the wall openings in the furred wall. 

Yes I agree, but doing custom furred walls allows more design flexibility and works better with the wall schedule for as-built situations, which is the bulk of my work.

It happens more than you might think in as-built situations. I did the attached plan file just to demonstrate the problem. If you delete one window, the problem is still there and it happens with doors as well.

Well, here I am again, the head finder of window problems. Believe me when I tell you that I would be happy for someone else to find these problems instead of me finding them just as I try to finish up a project. If anyone has a workaround for this I would love to hear it. The plan file that is attached is just for demonstrating the problem and not part of an actual project. Stem Wall and Furred Wall Openings_02.wmv Walls and Window Openings.plan

Wow great analysis. Thanks!

So you could control which walls are going to be displayed in the table. Usually, the problem of limiting distance only rears its ugly head on the wall closest to the property line. Most often only one side yard line needs to be considered where an additional window needs to be added to the design. Of course, this excersize is needed for all new builds as well.

I notice this is from a plan view, so the table is for one floor? If the building had 2 floors and a basement with windows there would be 3 tables?

Hi David, Thanks for going through that exercise. I will chase down the problem. Many of the things that you noted like the bathroom wall gap for the furring wall was actually a plumbing chase. There are some very strange items that I wouldn't have done, for example, the masonry wall where the stairs go to the basement. This was a very rough draft of the house just getting to the spot where I was blocking out spaces from the site measurements. Typically in an occupied house, it is really hard to get all measurements that would help to resolve conflicts because of furniture, drapes and sometimes a corner of the house with piles of stored materials. I suspect there is a discontinuity somewhere with one of the interior walls and the exterior walls. But so far I can't find it. Some of the things that you moved make the build not "as-built" but that is such a minor quibble. You found the needle in the haystack, and that is what counts. Thanks David.

This is strange but on floor level 1 only the whole building footprint can be selected, not individual rooms. Anyone have any ideas as to what I have done wrong. This plan is an asbuilt that is in progress. As Built Basement Apartment Zip.zip

That is pretty much what I do, but I include an elevation with the area boundary shown so that the plans examiner knows how I got to the calculations that I am using. I have been trying to get the macro for the window area to work like you are showing in your second pic showing the area circled in blue.

Joe, Column 1 is used to determine which row is being used. So if the wall is 26m^2 then you have to use row for 30m^2. Note that the total area of a window in a window well is NOT used. Only the area above the grade is included. In Canada only metric units are used for building code. There are no Imperial values used. So many drawings are done in metric units. That being said, most plan examiners still accept imperial drawings so long as rounding is done according to the 4/5 rule. 0.4 is rounded down, 0.5 is rounded up for example. For metres, usually, things are rounded to 2 decimal places, and for mm, no decimal places.

The exposed area is taken from the elevation of the wall, so when the wall has a hip roof the wall ends at the eave. Where the ceiling is lower than the eave, then the exposed part of the wall ends where the ceiling would stop the flame spread. I think this is just a bit arbitrary, but welcome to the world of building code and drawing examinations.

Yes 9.10.15 is exactly what I am talking about. Whenever a new window is added to a building the designer must create an elevation of that wall along with the area of the wall between the eaves or the uppermost ceiling (if that is lower than the eaves) and the surface of the finished grade. Then you must show on the elevation a calculation of the gross wall area and the window area as a percentage of the gross wall area. For the distance from the wall to the property line, there are limits as t0 the amount of window area allowed. Less than 1.2m no windows are allowed. See the table included.

Joe, does this system have a name. What do you charge for it? Can I use it on walls and windows?

Doors are not considered unprotected openings unless they have a window in them. The unprotected opening rule is for radiation through glass I think.

Hi Joe, Gosh my apologies, I didn't see your message. Yes I am still interested! my email is info@measurite.ca

Joe, I am getting very excited about this! My only question is when? I have to do this on every darn project I do, the room area glass thing. The other thing is the unprotected wall openings in exterior walls that have a limiting distance. The code requires the designer to calculate the percentage of the sum of window opening area as a percentage of the wall above the grade and below the eaves. If the wall is less than 4' from the property line then no unprotected (window) openings are allowed. At 4' you may have about 7% unprotected opening, and that percentage goes up and the distance from the wall to the property line increases. In general, you make the calculation based on a percentage from a table in the codebook.

And yet another solution. Untitled_1.zip

LOL that wasn't my request!!! I know how to do this without using a cheque.

Gif files can as well.

This is weird, but in this section view, the brick seems to be on the wrong side of the wall. Here is a vector view and here is a standard view This just seem strange

Here is the best excuse for not paying me for services provided. The client can't pay me because he has bills to pay.

All they care about is do you have a permit yet.