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Tie Bars & Pattress Plates


001 pattress plates tie bars retaining wall stone crack structural stability Armagh Belfast Northern Ireland NIOften buildings and structures require structural repairs due to cracks in walls and masonry, caused by an assortment of problems (structural movement, additional loading & insufficient support).  Cracks in walls can be insignificant, or they can have a serious detrimental effect on your building or structure; it is therefore important to contact a specialist who can assess and provide a solution, if necessary.

Conventional means of reinforcing a structure is by tie bars and pattress plates; Stronghold Preservation are also registered installers of Cintec socked anchors, a more innovative and discreet option which may be suitable for your project.

However, pattress plates are an effective option, especially where visibility of intervention is unimportant (bridges, engineering projects, stone walls etc).  Stronghold Preservation have been involved in a number of pattress plates & tie bar projects;

Castle Street, Newry001a pattress plates tie bars retaining wall stone crack structural stability Armagh Belfast Northern Ireland NI

The engineer specified a combination of Cintec anchors (where pattress plates were not suitable), and traditional pattress plates which are clearly visible externally on this stone building.  Stronghold Preservation initially monitored the cracks to determine if the movement was active, before diamond drilling and installing the tie bars, pattress plates and Cintec anchors.

 

 

St Patricks Grammar School, Armagh002 pull test load pattress plates tie bars retaining wall stone crack structural stability Armagh Belfast Northern Ireland NI

The masonry rubble retaining wall was found to be structurally   inadequate for its intended use, and was becoming increasingly unstable.  Stronghold Preservation worked with the structural engineer to help design a solution to ensure structural stability.  A test anchor was installed by Stronghold Preservation, and a nominal load applied to determine the bond strength.  The initial test load was used by the engineer to inform the current design solution.


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