Asymmetric Tie is a dual diameter remedial tie for securing soft outer wythe materials to a hard inner wythe, such as concrete.
1. A small pilot hole is drilled through the near wythe masonry and into the far wythe, to a predetermined depth, using a rotary percussion drill (3-jaw-chuck-type). Note: The hole in the near wythe is then re-drilled to open it up to the specified diameter.
2. The DryFix asymmetric tie is loaded into the special patented Power Driver Attachment (PDA) which is fitted to an electric hammer drill (SDS type).
3. The tie is power driven into position until the outer end of the tie is automatically recessed below the face of the near wythe masonry by the PDA.
4. The entry hole is made good using matching materials.
Points to note
The following criteria are to be used unless specified otherwise:
a. Length of DryFix ties to be sufficient to accommodate width of near wythe + width of cavity + 75mm (less 8mm to allow for recessing below near wythe face by PDA)
b. Depth of pilot hole to be length of DryFix tie + 25mm
c. Diameter of pilot holes to be ascertained on site, by conducting pull-out tests, to determine diameter of tie and pilot holes to comply with the specification.
- Developed specifically to secure relatively soft outer wythe material to a harder inner wythe, such as concrete or dense brick.
- The asymmetric tie has a longer section with a standard diameter (8mm or 10mm) and a shorter reduced diameter section (6.5mm or 8mm respectively) which penetrates 75mm into the inner leaf via a small pilot hole.
- It is installed in the same manner as standard DryFix ties to provide a rapid, reliable and concealed solution.
- Does not stress or fracture fragile substrates
- Requires only a small diameter pilot hole
- Easy to install and fully concealed
- No chemicals or expansion devices
- Withstands cyclic loading
- Accommodates differential movement
- Usable in all weathers and temperatures
