Using ¼ x 3 inches hammer set nail drive concrete anchors. The wood is 2 inches’ x 6 inches’ x 10 Feet.

Has hammer drill. First what size masonry drill bit (1/4?) Second how long should the
Fastener be, thickness of the wood is 2” leaving only an inch into the concrete, is that sufficient? Finally, can the process be done, in one shot. Just the wood placed against the concrete drill the hole completely through the lumber into the concrete and hammer the nail in.
Is that possible?

Horizontal or vertical? On a wall or floor? If a floor, I would use power driven nails. In a wall, I would use lead anchors. You are in FL I believe. If this is outside you most likely have wind codes if this is for a wall.

Horizontal in cbs block. Hurricane shutters to attach to the wood at the bottom. Top wood already has been in place . Bottom wood untreated rotted away. Man used concrete nails. Got to have a lot of muscles for those

Look at SPAX screws, go right into block, probably without drilling. I would not be hammering a lot on a block wall.

Thanks you so much. I have used lead anchors before but lining up the holes in the wood to correspond to the anchors in the concrete has been a problem. Especially
After the first one is done.

Holding wood in position, drill a small pilot hole through wood until it makes a dent in block. This will keep everything in line.

Chuck

Okay Thanks so much

Another tip is to drill the holes in the wood, place it where you want and shoot some black spray paint through the holes. Easy to see and lined up.

Sounds great. Simultaneously marking the entire board at its end. To make sure
the board doesn't shift out of its place. Then the holes in the wood will correspond with the lag shields in the cement. If the lag shield is 1/4 does that mean the masonry drill bit must be 1/4 also?

Sounds great. Simultaneously marking the entire board at its end. To make sure
the board doesn't shift out of its place. Then the holes in the wood will correspond with the lag shields in the cement. If the lag shield is 1/4 does that mean the masonry drill bit must be 1/4 also?
No, bigger hole needed. . the lag shield will be marked with the size drill needed but will probably be 1/2".