REMEDIAL WALL TIE - DU GROUT TIES APPLICATION

Thor Helical grout bonded remedial wall ties installation guide

Thor Helical 9mm D. U. Grout Tie Specification

Thor Helical 9.00mm nominal O.D., 316 grade stainless steel, helically roll - formed wire ties having a characteristic cross-sectional area of 14.88mm², and a pitch accuracy variation of no more than 0.5% from any given probate pitch along the axis, inserted into pre-drilled Thor D.U. Grout filled holes at intervals determined by a qualified structural engineer.

METHOD STATEMENT

Cavity Walls
1.	Drill 12 – 14mm pilot holes to both leaves using masonry drill and clean hole of all drillings and dust – inner leaf minimum embedment 75mm.
2.	Holes should be thoroughly flushed with water, or treated with a suitable primer where high porosity masonry exists.
3.	Install D.U. Grout to remote leaf drilled hole, with appropriate tool, and insert tie.
4. ( Test Only )	Apply test procedure after curing period.
5.	Install D.U. Grout to nearside leaf encapsulating the recessed tie and make good in accordance with specification.
(N.B. For solid walls - fully grout drilled holes and then insert tie).

Cavity Wall Tie Spacing – Must be determined by a Consulting structural engineer - Subject to minimum tensile proof loads being achieved and in accordance with A.S. 3700 2001’ i.e. Max. allowable 600mm grid spacing.

Drivefix and D.U. Grout Bonded tie procedures may be combined where far connection leaf is either harder than near leaf, or, is constructed with hardwood timber studs or timber floor/ceiling/roof timbers.

Thor 9mm D.U. Grouted Ties Thor D.U. Indicative Usage Rates - (Solid Masonry).

Repair of Corner Crack	Cross Stitching a Cracked 350mm Solid Wall (Cosmetic crack repair to walls having architectural patch resistant renders).
Repair to Internal Masonry Partition Wall (Graphics for Illustrative Purposes Only).
Repair of Masonry Arches and Lintels (Graphics for Illustrative Purposes Only).