What Is The Proper Concrete Control Joint Spacing

See the full blog post about concrete control joints at www.concretetoo...
In todays video I want to share with the proper spacing for concrete control joints.
Often times people don't put their cuts in the proper locations and rather decide to put them wherever looks good aesthetically. The thing is, there is a time and place for everything and unless you are just putting in decorative concrete cuts then you are going to want to be sure that your cuts are put in the right spots.
To plan out where you are going to puts your cuts it is going to be important to know the depth of your concrete slab. The reason for needing to know this is because you will want to take the depth of your slab and multiply it by 24 to 36. See examples below...
If you have a 4 inch slab and multiply it by 24 to 32 you will find that your joints should be placed every 96 to 144 inches or 8 to 12 feet
If you have a 5 inch slab and multiply it by 24 to 32 you will find that your joints should be placed every 120 to 180 inches or 10 to 15 feet
Or another way to figure this out is to times it by 2 or 3 in feet. So for example if you take a 6 inch slab times 2 is twelve feet or times 3 is 18. I'm sure you get the picture, pretty simple right?
Another very important part about figuring out where your control joints are going to is and outside 45 degree angle (or any sharp angles for that matter). Often times this is going to be the very first point that you will run into concrete starting to crack. It is very important to get your cuts put on your 45's either while finishing or as soon as you possibly can afterwards. Often times I have even returned early when saw cutting my joints just to cut my corners and then came back a little later to do the rest.