LATERAL RESTRAINT | BOWING WALLS & LATERAL RESTRAINT
The most common reason to install additional lateral restraint in a domestic property is to prevent unrestrained external walls from moving further out of plumb. An external wall that has moved laterally, or bowed, is fixed back to the main part of the building by making a strong connection between it and the internal floors or walls.
There are many buildings where the walls are in danger of moving or collapse because of inadequate lateral restraint of the wall to floor joists, ceiling joists or roof structure.The problem can be caused by one or a combination of factors. such as:
- Re-roofing using heavier materials such as the removal of slate tiles and replacing them with modern concrete tiles would give increased vertical loads which could exceed the load-carrying capacity of the wall and when wet the concrete tiles hold water and increase there weight.
- The omission of lateral restraints or their failure in service can magnify the effects of other contributory causes.
- Decrease of wall stiffness and resistance to buckling and wind loading, can occur, with wall tie corrosion or insufficient wall ties installed during construction.
- Addition of new storeys to property.
- Walls too high for their thickness.
- Vibration from road traffic or building works locally.
- INCREASED WEIGHT LOADS TO FLOORS.
WHAT IS THE SOLUTION TO THE PROBLEM
Lateral restraint ties to tie into the floor joists and partition walls to help stabilise the main wall. The remedial systems we use In most cases we are able to do this with a lateral restraint tie which is quick and easy to install without any major disruption to our clients with only the need to lift a few floor boards, unlike the old method of having to remove skirting boards and screw restraint straps down to the floor joists causing unnecessary disruption to the client and is therefore unsatisfactory.
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