Lateral Restraint for Bulging / Leaning Walls
Prevent movement of masonry by securing bowing or leaning brickwork to a stable floor diaphragm… a proven, minimally invasive solution.
The Problem
Bowing or leaning masonry poses a serious structural risk. This can result from inadequate restraint, loss of connection to internal floors, tie failure, or movement over time. The wall must be secured to prevent further movement and potential collapse.
Best Practice: Fixing bulging walls to a stable floor diaphragm should only be considered where the bulge does not exceed approximately one third of the wall's thickness.
Two Product Types
Lateral Restraint Ties
For joists parallel to the bulging wall. Installed through a Ø16mm clearance hole in masonry, drilled into multiple floor joists.
- • Ø8, 12mm diameter
- • Standard lengths: 1, 1.2, 1.5m
- • Grade 304 Stainless Steel
Joist-End Restraint Ties
For joists reinforcement perpendicular to the bulging wall. Ø6mm pilot hole through masonry, hammered into joist ends.
- • Ø9mm diameter
- • Lengths: 255–405mm (25mm increments)
- • Grade 304 SS (316 on request)
- • Self-tapping — no splitting of timber
Key Features
Thor Helical Masonry Connection Sleeves combine lateral restraint ties with bed joint reinforcement to provide structural upgrade to masonry. The Connection Sleeve features an internal thread that screws onto the Lateral Restraint Tie.
Test Results
Lateral Restraint Tie — Test Results
| Bar Diameter (mm) | Substrate | No. of Joists | Pilot Hole (mm) | Mode of Test | Ultimate Load (N) |
|---|---|---|---|---|---|
| 8 | Timber (47mm softwood) | 2 | Not required in timber | Tension | 6,100* |
| 8 | Timber (47mm softwood) | 3 | Not required in timber | Tension | 9,500* |
*In-house testing only — on-site pull-out tests required to evaluate substrate-specific performance.
Joist-End Restraint Tie — Test Results
| Bar Diameter (mm) | Substrate | Min. Embedment (mm) | Pilot Hole (mm) | Mode of Test | Mean Load @ 2mm (N) | Ultimate Load (N) |
|---|---|---|---|---|---|---|
| 9 | 47mm thick C16 Timber | 102.5mm in masonry / 165mm in timber | 6mm in masonry / not required in timber | Tension | 2760 | 4100 |
Thor Helical Additional Accessories
Lateral Restraint Tie — Ø8–12mm
For joists parallel to the bulging wall. Through masonry, drilled into multiple joists at 16mm clearance hole. Lengths 1–1.5m. Grade 304 SS.
Joist-End Restraint Tie — Ø9mm
For joists perpendicular to wall. Self-tapping into joist ends. 6mm pilot hole through masonry only. Lengths 255–405mm in 25mm increments.
Lateral Restraint Tie Connection Sleeve
Combines lateral restraint with bed joint reinforcement bar via threaded Connection Sleeve. Provides structural upgrade to masonry.
Downloads
Full technical data, test results and installation guidance
TH Lateral Restraint Ties
Ø8 & 12mm Lateral Restraint Ties
TH Lateral Restraint Tie Connection Sleeve
Ø8 & Ø12mm Lateral restraint connection sleeve for structural upgrade in masonry
TH Joist-End Ties
Ø9mm helical ties used to restrain bulging walls to the joist ends of a stable floor diaphragm