Image courtesy of Win Clark. Disclaimer: Images are for illustrative purposes only. We do not assert that any building shown or part thereof is earthquake-prone. Further we do not guarantee that any building, part thereof or associated work will be eligible for the Heritage EQUIP fund. Information on eligibility is available at Am I eligible.
 

Hazard

Parts of unreinforced brick masonry wall break off or entire wall collapses onto ground – life hazard to those on ground and to structural integrity of the building.

Potential structural strengthening project

Project to enhance the wall’s capacity to resist loading in a direction at right-angles to the plane of the wall.

A saw-cut is made vertically into the brickwork to just over half the thickness of the wall. A carbon strip or galvanized steel bar is grouted into the saw-cut with epoxy. The remaining depth of the saw-cut is filled with mortar. The brick surface can be left exposed or hard plaster finished.

If access is available from both sides of the masonry wall, the strips or bars can be installed on both sides, into saw-cuts that are of sufficient depth to just take the strip or bar.

Project to enhance the wall’s capacity to resist loading in the direction of the wall plane.

Glass or carbon fabric is saturated with epoxy resin and placed against the prepared surface of the masonry. Vertical tie-downs may be required at each end of the wall.

Possible first steps with a structural engineer

They assess the structural capacity of the masonry wall and provide specifications for the required strengthening work.

 
 

Updated on 15th December 2016