I need to drill 2 holes in a concrete wall, about 1.5m apart and I need the line between them to be as horizontal as possible.
I have a level, not that big, and few other basic tools.
How can I align them properly?
How to align 2 holes 1.5m apart
drillhole
Related Solutions
Do you need more shelves, or do you just need one of the existing shelves to be at a different height?
If it's the latter, it may be easier for you to add some supports underneath one of the existing shelves like this:
The supports should run the depth of the cabinet, and you can attach them with command strips or double-sided tape. Be careful removing them because shelves are often covered with paper that's printed to look like wood.
If you need more shelves, it may be better for you to build a new shelf using the same idea, but have the new shelf resting on one of the existing ones. You'd lose a little bit of space on the lower shelf, but you'd avoid the risk of breaking your rental agreement and/or losing your deposit. You'd also need to be careful not to overload the lower shelf or the whole thing could come down.
The vendor will be able to give you this information based on the thickness they apply the material and any specs you gave or requested when they quote the job.
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Best Answer
Make a plumb bob by hanging a heavy and centered weight from a chalk line and snap it in the center of your desired holes.
. Now pick a point on the wall that will be your left hole and two points on your chalked line. Use a wire and measure the distance from the hole to the upper point on your chalk line. Draw an arc on the opposite side of the wall. Repeat for the lower point on your chalk line; where they intersect is the location of your other hole.