|
Thor Helical 9mm Diaphragm Tie Specification
Thor Helical 9.00mm nominal O.D, 316 grade stainless steel, helically roll - formed wire 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, impact driven
through pre-drilled, pre-determined sized pilot holes in the perimeter masonry and through into the second parallel framing timber,
or, an embedment depth not less than 75mm into the timber framing end grain at intervals determined by a qualified structural
engineer.
METHOD STATEMENT
Diaphragm Tie Spacing – Must be determined by a Consulting Structural Engineer - (Nominal 600mm horizontal spacing).
| 1. |
Drill pilot holes through masonry to penetrate two parallel floor or ceiling
joists, or a minimum of 75mm into timber end grain using, initially, a masonry drill size 6 – 7.5mm, followed by a similar sized
wood bit if available.
N.B. To assist in accurate tracking across cavities allow the drill to STOP rotating prior to contacting and drilling
each leaf. CAUTION – THE TIE MUST VISIBLY ROTATE AT A CONSISTENT RATE WHILST PENETRATING. The pilot hole diameter is critical,
too small and the tie may bend rather than penetrate, too large and the tie will ream out the drilled hole in the masonry as it
penetrates and will not be seen to rotate. |
| 2. |
Drill clearance hole to masonry for installation of Test Key if required. |
| 3. |
Drive in 9mm Thor Helical Drive Fix tie using telescopic SDS support tool & recess below brick face. |
| 4. |
Make good with clear silicon and brick dust from drilling. |
CAUTION - ENSURE FLOOR/CEILING VOIDS ARE FREE OF SERVICES.
Where Thor bed-joint reinforcements are also being installed they must be in the mortar joint directly above or below the Thor Diaphragm Ties.
Download PDF Brochure: THOR Remedial Diaphragm Ties
 |
 |
| Cavity Walls |
Solid Walls |
|
 |
 |
Bays Windows
(Graphic for Illustrative Purposes Only) |
|
|
 |
| Stairwell Application |
Back to Top
|
