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Consultancy for Conservation Study of Chik Kwai Study Hall at Pat ...

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6.7 Work required to remove the interventions and to repair<br />

the ro<strong>of</strong>s etc.<br />

6.7.1 The whole building<br />

All removable decor<strong>at</strong>ive items and other artifacts should be removed from site and stored. All<br />

other artifacts th<strong>at</strong> can not be removed should be protected from damage.<br />

There should be a complete renewal <strong>of</strong> the ro<strong>of</strong> timbers to the Front and Main <strong>Hall</strong>s. Work is<br />

also required to remove the concrete floors, columns and beams <strong>of</strong> these halls, and the ro<strong>of</strong> slabs,<br />

columns, beams and internal facing brick walls <strong>of</strong> the side halls. This will mean<br />

� the external walls to the side halls will be unrestrained in the top storey<br />

� the tops <strong>of</strong> the walls <strong>of</strong> the front and rear halls will only be restrained by the wall<br />

returns.<br />

� the granite columns to the front porch and the main hall will have no l<strong>at</strong>eral restraint.<br />

� the granite column capitals <strong>of</strong> the side halls will have to be removed from the<br />

embedment <strong>of</strong> the concrete beams.<br />

� there will be mechanical oper<strong>at</strong>ions within the building including vibr<strong>at</strong>ion, hammering<br />

and other impact.<br />

As a result it is recommended th<strong>at</strong> the entire building should be scaffold with a framed steel<br />

scaffold designed to give l<strong>at</strong>eral support to the walls and columns. It should be erected to all areas<br />

other than the cockl<strong>of</strong>ts prior to any work commencing. A scaffold should be erected to support<br />

decking below concrete slabs and beams to collect debris during demolition and to additionally to<br />

beams to be demolished to prevent prem<strong>at</strong>ure collapse or transfer <strong>of</strong> loads.<br />

The packing and bracing to give l<strong>at</strong>eral support to the walls from the scaffolding should be in<br />

timber to prevent damage to the brickwork with any decor<strong>at</strong>ive fe<strong>at</strong>ures considered individually.<br />

External scaffolding should either not block the ingress or egress to the adjoining properties<br />

or altern<strong>at</strong>ive access should be arranged.<br />

A full temporary ro<strong>of</strong> should be erected over the whole building, excluding the central<br />

courtyard, to protect the walls from deterior<strong>at</strong>ion.<br />

Pointing and Decor<strong>at</strong>ive works<br />

Prior to the demolition <strong>of</strong> the scaffolding the walls should be checked and repointed as necessary,<br />

Pointing should include the raking out <strong>of</strong> all brick joints and perpends and deep pointing to all<br />

joints all to be carried out in lime mortar. The mortar should be b<strong>at</strong>ched by weight to maintain the<br />

colour and consistency; complete areas being pointed <strong>at</strong> one time r<strong>at</strong>her than <strong>at</strong> different times<br />

214

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