How do I find these questions in the 2005 National Building Code of Canada binder?

What is the maximum length permissible for foundation walls with no crack control joints according to the National Building Code of Canada? Also, when crack control joints are required, what is the maximum spacing required?

How do I find these questions in the 2005 National Building Code of Canada binder?
I'm going to answer based on my knowledge of the international building code (paradoxically, this is a US standard, we're just uppity), the IBC doesn't list crack control joints, leaving it to the ACI, really crack control joint spacing depends on the shrinkage expected in the concrete, if you need it watertight, and other things, so the building code in the US doesn't set limits. You can get guidelines from ACI on crack control spacing, perhaps 20 feet to thirty feet being reasonably common (and this is not a completely blind guess, but I don't do a lot of long walls, so it has some grounding in reality but not an expert answer by any means), up to 100' if you really got specific on the concrete formulation and used special (expensive) concretes.





I would suspect that the NBC of Canada does the same thing, in other words, offers no advice and you'll have to go to the canadian equivalent to the ACI (the American Concrete Institute), who publishes ACI 318, the standard for building construction in concrete for the U.S.





If you are asking about residential construction, I would be surprised if many contractors put in crack control joints, preferring to pour it full length and let it crack, the cracks are not likely to be large and the homeowner can be left with the headache of sealing the crack in a year when the shrinkage finally stops and they notice water through the wall. Barring that, the International Residential Code might have some information but I doubt it. If I find anything more specific I'll post it.





Sorry I can't be more specific.