Check to make sure there are no electrical or plumbing lines.
Cutting a trench in concrete.
I think he was seeing rebar.
Though a good concrete cutter can tell the difference between rebar and cable if he s cutting it.
With the jackhammer cut the drainage channel down to where you dug the trench in your yard so that the water will flow in the correct direction.
To cut concrete with a 15 amp circular saw start by using chalk to mark cut lines on the surface of the slab.
Once the concrete is out you can dig in the remaining trench to remove the sand or soil before running the new plumbing.
Turn on the saw blade and slowly.
I ve just cut several trenches 2 3 ft wide x 25 ft long in my existing concrete slab to run plumbing.
Tools used in this video.
Rosin paper stihl diamond saw exhaust fan if you have any questions.
Locate the area of the concrete floor where you would like to cut the channel.
This is how to video on cutting a plumbing trench in concrete.
Snap a chalk line over the concrete where you want the center of the drainage groove.
I also had to break up footings in a few locations as well.
Once you ve cut along the borders of the trench the next step is to remove the strip of concrete from between the two.
How to cut drain grooves in concrete step 1.
The slab was about 4in thick with wire mesh and a plastic barrier between the concrete and the wet clay like soil home located in new orleans.
Continue to cut along the entire length of the chalk line then go back to the starting point and make a second pass.
Step 5 install the pipes to finish the job mix the cement and spread a layer about 3 inches thick around the mouth and sides of the drainage channel.
Considerations cutting through a concrete floor should be a last resort.
Next set the saw s blade depth to 2 inches and attach a 7 inch diamond blade using vice grips so that the teeth point in the opposite direction of movement.
Place the tip of a walk behind concrete saw blade over the center of one line.
The same guy that operated the scanner cut the trench.
Set the bit down between the two saw cuts and about four.
Measure to the left and to.
Don safety glasses hearing protection and steel toed boots for protection.
