Remember that the top of the shelf will be above your marks.
How to hang shelving on block walls.
Then install anchors or drive the screws into the studs and hang the shelf.
Use a hammer drill.
How to install shelves on a brick or concrete wall.
Place a pencil mark where each shelf will start and use a 4 foot.
Use a hammer drill with a 1 4 inch mason bit or an electric drill with the same bit to.
Have a shop vac or vacuum hose right under where you drill.
Adjust the level until the bubble is centered and mark the keyhole locations on the wall.
Size the screws to the weight that will be on the shelf.
Some key tips to hang shelves on cement block.
How to drill into concrete to hang a tv shelves racks etc.
Measure out the rough height at which you plan to install each shelf.
Do not drill into the joints between the blocks.
Devices called brick clips or brick hangers allow people to hang pictures mirrors and other objects on walls without drilling into the brick.
My diy way to screw brackets into cement same as brick.