Structural solutions that guarantee peace of mind

Structural solutions that guarantee peace of mind

Structural solutions that guarantee peace of mind

Structural Repairs

AAWU members can offer a range of services in the area of structural repair & stabilisation of masonry that are both highly effective, non-disruptive and economical compared with rebuild options. Your local AAWU member can undertake repairs to deal with Crack stitching, Lintel re-enforcement, Overbeaming, Expansion joints and Lateral restraints.

Structural repairs to timber beams are also possible using discrete resin systems and this approach is frequently deployed by by AAWU members on behalf of English heritage as a way of minimising disturbance to existing structures. please don’t hesitate to contact an AAWU members in your area for further details on all these methods of repair (beam-end replacement, flitch plates, load bearing tolerance up-grades, etc.).

Remedial Wall Ties

The system for Remedial Cavity Wall Ties can be employed to reinstate stability to existing walls damaged by; the expansion of corroding mild steel vertical twist ties, loss of wire ties by corrosion, insufficient ties, ineffective ties and or unrestrained masonry.

The choice and validation of suitable Remedial Wall Ties and their density must provide the fixing in both inner and outer leafs required by the imposed loads (refer to topographic tables) and conform with BRE Digest 329, 401 and BS 5628. AAWU members can install a variety of Remedial Wall Ties from the Thor Helical range (http://www.thorremedial.com) including the unique ‘DriveTie’, a friction-bond helical wire tie
manufactured from 304 stainless steel.

Remedial Wall Ties are the cost effective solution for the majority of problems

Testing

Testing should be undertaken at a minimum of one or two fixings to each elevation to determine the minimum pull load obtainable from both leafs. On large projects 5% of ties should be tested as part of the installation routine. The tensile load results should be used to prove, and/or determine the suitability of, the fixing and density in accordance with BRE Digest 401.

It is not practical to carry out compressive resistance tests on site. Thor remedial ties can be considered adequate in compression as compression required is usually 80% of that needed in tension when tested in accordance with DD140: part 1.