Quite often in home building, a concrete tie is needed to fasten concrete or brick together at a right angle or to ensure a concrete wall is plumb and vertical. This situation arises most frequently when building foundations. Learn more about various concrete tie types and their uses below.
What Is a Concrete Form Tie?
A concrete tie is made of high tension spring steel. The ties form a matrix that helps poured concrete stay within the forms until it solidifies. The concrete ties exert sufficient pressure to prevent bulges and air gaps in the concrete. Upon releasing the brackets holding the form ties in place, the concrete form tie matrix can be easily disassembled.
How to Assemble Concrete Form Ties
You can order the concrete form ties in any size from 6 inches long to 14 inches long. Each box has 500 ties and connectors to enable you to build the concrete form tie matrix you need to hold up poured concrete forms in almost any size room foundation.
How to Release the Concrete Form Ties
Use the flat side of a claw or ball peen hammer to tap the ends of the ties where they meet the concrete to release the matrix at the edges. Undo the brackets to disassemble the concrete form ties completely. The advantage of these concrete form ties is that they do not penetrate the concrete. You have no wires poking out of your concrete wall when it is set.
What Is a Concrete Fastening Tie
A concrete fastening tie is used on the outer edge of a foundation wall to attach another section of concrete or brick to it at a right angle. These fastening ties are made of galvanized aluminum or galvanized steel, with pre-drilled holes to take concrete anchor bolts. The concrete is drilled and the bolts are inserted to secure the concrete tie to the concrete, masonry or brick. Generally the concrete fastening tie will be covered by other material such as insulation or plywood by the time construction is completed. Concrete fastening ties are also used in buildings that will be subjected to severe wind stress such as hurricanes, or to vibration such as earthquakes.
How to Attach a Concrete Fastening Tie
Place the fastening tie on the right angled location where walls need to be fastened and reinforced together. Mark the drill holes of the fastening tie onto the concrete and other masonry. Use a carbide masonry drill of the appropriate size to drill the holes at least 1/8 inch deeper than you will be sinking the anchor bolts. Install the anchor bolts in pairs, 1 through 1 side of the fastening tie, then through its mate on the other side. Install the top pair and bottom pair first to maintain the alignment of the drill holes.
Advantages of Concrete Fastening Ties
Concrete fastening ties reinforce the structure of concrete walls at right angles, holding them steady under strong wind or vibration pressures. Concrete fastening ties also enable the later structures of walls to stand more plumb and vertical on a more solid base without shifting or cracking.