Metallics JHW12234 Anchors 1/2 X 2-3/4 Hmmr Drv Wedge Zn-C (Jar 25)

Overall length is 2-3/4 inches, so whatever that length is not consumed by embedment in the concrete is your usable grip. With a 1/2 inch wedge anchor the minimum embedment is in the range of 2-1/4 inches, which leaves this one suited to thin attachments like strut, conduit clamps, and equipment feet rather than thick base plates. If you are bolting through a heavy plate or a sill, step up to a longer 1/2 inch anchor.

Wedge anchors are for solid, poured concrete. In hollow block the expansion clip has nothing solid to bite into through the cell wall, and in brick the anchor can split the unit. For block or brick use a sleeve anchor or a screw anchor rated for masonry instead.

The JHW12234 is zinc plated carbon steel (the Zn-C in the description), which is a dry interior finish. It will corrode in wet, exterior, or washdown areas. For outdoor pads, parking structures, pool rooms, or coastal work, specify a stainless or mechanically galvanized 1/2 inch wedge anchor.

25 anchors per jar. The pack type is a jar, which is how Metallics ships smaller-count fastener quantities for van stock and service work, so ordering one unit gets you 25 of the 1/2 x 2-3/4 anchors rather than a single piece.

Order Metallics JHW12234. That covers the 1/2 inch by 2-3/4 inch zinc plated hammer drive wedge anchor in the 25 count jar, and it is the only model this part is sold under.

It is the anchor electricians reach for when hanging strut, trapeze supports, panel backboards, transformer and disconnect mounts, and heavier conduit racking off a concrete deck or wall. The 1/2 inch diameter is the common size for strut and trapeze work. You drive it with a hammer rather than threading it in, which makes it fast for overhead runs where you are setting many anchors on one layout.

Yes, 1/2 inch wedge anchors are routinely set overhead into the underside of a poured deck for trapeze and strut support, and that is a typical use for the 2-3/4 inch length since there is no thick fixture to grip. What matters is that the hole is blown clean before setting, since dust left in the hole is the usual reason an overhead anchor pulls out.