Step 1
Attach 6-inch L brackets to the concrete wall for each rail in your fence panel. Run a string along the top of the top fence rail to the wall. Mark the spot and use a plumb bob to locate the lower brackets directly below the top bracket. Typically, manufactured fence panels have two or three horizontal rails made of 2-by-4s. Measure the height of the rails from the ground and mark the wall at the appropriate points.
Set the first L bracket in place and mark the screw holes with a pencil. Repeat the process for all brackets.
Step 2
Use a 3/16-inch masonry bit to drill a pilot hole for every screw, typically three to four holes per bracket. Drill the hole 1/4 inch deeper than the length of the anchor. Wrap a piece of masking tape around the bit at 2 1/4 inches to mark the correct depth. Blow the dust from the hole.
Step 3
Use 1/4-inch by 2-inch tapcon type anchors to attach the brackets to the wall. Use a drill and the manufacturer-suggested screw tip. Snug the screws down firmly, but avoid overtightening.
Step 4
Attach the fence panel to the last fence post and set it against the L brackets. Use 2-inch No. 8 wood screws to attach the panel to the brackets at the wall end.