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Guidelines for Cemetery Conservation - National Trust of Australia

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GUIDELINES FOR CEMETERY CONSERVATION<br />

PART FOUR -- APPENDICES<br />

5. Cracked or broken mortise or tenon with plinth<br />

• Fall The options are:<br />

(a) if the tenon is still sound:<br />

• replace the plinth with a new facsimile, or<br />

• cut back the top <strong>of</strong> the existing plinth and remortise it, or<br />

• set the stone in a moulded concrete plinth with mortise, in the same <strong>for</strong>m as<br />

the original, or<br />

(b) if the tenon is broken <strong>of</strong>f<br />

6. Masonry cracking<br />

• level the plinth top and fix the upper piece with non-ferrous dowels.<br />

Pressure from the continuing process <strong>of</strong> iron rusting and<br />

expanding when damp<br />

(a) where iron cramps within the masonry have expanded, remove them. If necessary,<br />

replace with bronze or stainless steel clamps, and repair masonry.<br />

(b) where wrought iron rails, posts and bars have expanded and cracked masonry:<br />

• remove iron from masonry<br />

• scrape away loose rust<br />

• treat as set out in 10. (hot dip galvanise if possible)<br />

• apply protective paint<br />

• repair masonry<br />

• using quality elastomeric sealant, fix-in a prepared hole in the masonry,<br />

ensuring that no part <strong>of</strong> the iron is in contact with the stone<br />

• stop up interstices in the masonry to make watertight, and ensure that water<br />

is diverted from the area.<br />

CEMS\Policy Paper Review & model letters\2nd Edition Jan 2010.doc 131

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