Helifix Asymmetric Tie is a dual diameter remedial tie that secures relatively soft outer leaf material to harder inner leaf material without stressing or fracturing fragile substrates.
1. Drill small pilot hole using rotary percussion drill, 3-jaw chuck type
2. Load tie into DryFix Power Driver Attachment fitted to SDS hammer drill
3. Drive in tie until outer end is fully recessed below face of masonry
The following criteria are to be used unless specified otherwise:
a. Length of DryFix ties to be sufficient to accommodate width of near leaf + width of cavity + 75mm (less 8mm to allow for recessing below near leaf 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.