Using a metal jointing tool the.
Cutting lines in concrete driveway.
The outside lines indicate where the concrete should be cut.
Lift the line simultaneously from each end and slap it to the ground.
A good rule of thumb is to make your cut the thickness of your concrete.
If of your slab s thickness doesn t reach 1 make sure you still cut at least a 1 depth.
Get a friend to hold one end while you hold the other and run the line over the region to be cut.
Score the length of the cut three or four times with the chisel.
Designate the area of finished concrete to be cut using chalk lines.
Make sure you are cutting joints soon enough.
Don t force a blade into a cut.
These are called control joints.
One thing to be aware of before we go further.
Apply the line as thick as possible.
Mark the places you want to cut on the concrete slab either using chalk line good for long straight edges or chalk.
How to saw cut concrete.
A circular saw with a masonry blade can also be used to either score or completely cut through the block.
Once you ve laid out the joints to be cut mark them using a chalk line.
Factors such as curing techniques slab thickness slab length and base type must be analyzed before selecting where joints should be cut.
If you re using water cutting equipment make sure that the water is running all the way down to the blade.
Step 2 place the tip of a walk behind concrete saw blade over the center of one line.
You ll ideally run a trickle of water.
When you are looking for saws to do relief cuts make sure that it is a down cut.
These joints should be cut in a quarter of the depth of the concrete slab during the very beginning of the curing process within 24 hours of the initial pour.
Measure to the left and to the right of the chalk line 2 inches and snap two additional chalk lines.
In this condition if you don t want to use a grooving tool to cut joints there are early entry dry cut lightweight sawsthat can be used almost immediately after finishing.
The joints can also be installed as soon as the concrete hardens by using a diamond saw that cuts the line.
If your cut doesn t need to be exact use a cold chisel and hand sledge to cut the concrete.
When you re cutting concrete that is already poured and finished use a chalk line to mark the region.
The lines act as pre weakened stress points that encourage the concrete to crack at these locations.