Pavers prepared and removed

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1 November 2010 Dear clients and friends: Welcome to our latest edition: November 2010 As always, we hope you find time to read our news update and find interest in our selection of projects Completion of the heritage facade works to 44 Martin Place This challenging but very rewarding heritage project has just been completed, having initially started in late May 2009 Regular readers will notice this is the third newsletter about the project Due to facade access and ground level protection issues, the works were sequenced over a number of stages, project managed by TR Group with Jackson Teece acting as heritage architects Stage 1 The removal by crane of some 2200 large concrete pavers from the roof (about 100 tonne) old steelwork and all planters and furniture from the roof area Completed over two Sundays, it involved substantial project planning and preparatory works, In this issue we have focused on: Completion of the heritage facade works to 44 Martin Place New windows, patio doors and facade works at Bellevue Hill Pavers prepared and removed as a 130 tonne crane was set up in Castlereagh St Due to the limited load capacity of the roof, preparation works were restricted So on each day small skips were placed around the roof area, partially filled, lowered, and dropped into large tipper trucks parked in Castlereagh St Stage 2 This began with the design and erection of a 32 m long x 75 m wide structural hoarding in Hosking Place Roof access points into swing stages were set up to allow our specialist repair teams to: investigate reinforced concrete window mullions (including cover meter survey, carbonation and chloride testing), document and Roof retention tank works at Dee Why Another ACRA Award for Excellence And finally, an Out of Africa story Swing stages over hoardings for investigation, repairs & coating photograph repair the window mullions, running the full height of the facade do additional window sealing and fixing work on completion, apply a protective coating to all the mullions to the cleared roof, install a two layer torch-on membrane including detailing to walls, plant areas and drains as before, load materials by crane to the roof from Castlereagh Street Stage 3 Now began the main works to Crane removes roof pavers, etc Typical mullion repair detail Roof membrane applied to roof

2 the Martin Place and Castlereagh Street facades as well as the large tower of the building: Structural hoardings erected to support the large scaffold installation to the two facades and tower Initial investigation of the sandstone elements to confirm the specified items and establish any other works to the contract Level 10 sandstone lintels demolished and prepared for new 400 kg sandstone lintels to be moved and fitted into place This included preparation and fireproofing works to the rear of each lintel Removal of southeast corner sandstone blocks to full height Again preparing the area and fireproofing steel elements prior to the installation of new stone blocks Removal and replacement of other deteriorated sandstone to the Looking down on Martin Pl facade and roof Level 10 sandstone lintel removed facade and combing back fretted stonework Prior to repointing all the Level 10 sandstone, the asbestos contaminated bedding mortar had to be removed using a special removal process which involved sealing off each area of scaffold to conform to OH&S regulations On each tower face there are fantastic statues which were in need of repair, repointing and sealing to withstand future environmental damage The deteriorated parapets and Level 10 were cleaned using a non-destructive cleaning process The parapets were capped in detailed lead weathering Other roof works involved getting all new furniture, plants and equipment put in place for a separate contract to create a fantastic roof garden and entertainment area for the main tenant To deliver a project of this size, complexity and heritage significance in the heart of the CBD Structural hoarding and scaffold at the SE corner and Martin Pl elevation Lintel in place ready for finishing and repointing Southeast corner prepared and fireproofed ready for stonework New stones cut and placed Hoardings and scaffold in place Martin Pl & Castlereagh St New lintel in and surrounding stonework finished off Stonework finished off to corner over full building height

3 required significant management and supervisory input and skill Also a very good working relationship was required of the overall team including the owners and tenants The building facades are now ready for the next 100 years, and stand testament to the foresight of Compare the statue after being repaired and treated including lead weathering with the same statue and its s u r r o u n d i n g stonework as it was the owners investing for the long term repair and protection of this prime asset A concluding spread of facade and roof top photographs tell their own story to complete the picture of a very successful major project Asbestos removal encapsulation Cleaning stonework to all of the parapet and Level 10 Parapet badly environmentally stained (below left) has been repaired, repointed and cleaned with Juliet type balconies waterproofed and protected (below right) Removal of contaminated mortar Installing new stonework

4 New windows, patio doors and facade works at Bellevue Hill Compared to the heritage work described in the lead story, this project may seem a little mundane But to the owners of the eight storey building in Victoria Road it was an investment in upgrading and increasing the value of their building The initial investigation and design work was undertaken by Ollo & Co architects, culminating in a tender process with Preservation Technologies being selected The building has two effective tower blocks with a central stair and lift shaft joining them The works started to the lower tower with the erection of a fully fixed scaffold and materials hoist These were moved to the front tower on completion of stage one The main work items were: Remove and replace all patio doors and windows with new commercial grade aluminium windows, including associated internal work to reveals, ie, patching, painting, removing and replacing blinds and shutters, and creating new door Front (left) and side and rear (right) elevations before and after thresholds where required Trial various mortar colours for ultimately repointing all facade brickwork Replace brickwork where required Clean all facade brickwork Paint all previously painted elements including handrails and metal windows Remove old spandrel tiles and install a new tile system to enhance the building facades, including over the front elevation brickwork A variety of plumbing works Some minor building works Full time supervision and significant project management was called for to manage the works, particularly with so much internal access required and with all units fully occupied during the project There was an excellent working relationship between our site team and the architect and owners committee and this proved essential to delivering the project to program and ensuring a quality outcome for the owners Typical window installation Stage one works to rear tower Large window sizes Old spandrel tiling Spandrel tiling and window Lift shaft exterior done

5 Roof retention tank works at Dee Why Following investigation of building defects by Diagnostech, a tender specification was issued, which covered major defects to what was designed as a roof stormwater retention tank An inadequate membrane had to be replaced and parapet walls reconstructed due to widespread cracking and lateral displacement The scope of works broadly covered: A fixed scaffold system was erected and moved around the building as demolition and construction works proceeded A fixed-in-place materials hoist was installed for all materials handling Roof area and set-back parapet wall prior to commencement Overhead protection was put in place as required The existing set-back perimeter wall was demolished and rebuilt off the existing hob in 150 mm reinforced core-filled blockwork, including associated dowelling in work The remaining perimeter parapet walls were demolished, with a new double skin wall put in place The internal wall was again constructed in 150 mm reinforced core-filled blockwork, pinned to the slab at max 200 mm centres with epoxy grouted N12 bars embedded 75mm into the slab and incorporating new movement The parapet walls were demolished and removed Core-filled blockwork rebuilt the parapet walls New external skin of parapet wall tied to the block wall Set back parapet wall under construction Three layer torch-on membrane application under way Outer roof finished in liquid membrane and parapets capped control joints at max 8 m centres New stepped cavity flashings were installed to the perimeter parapet walls The new walls were encapsulated internally with a torch on membrane

6 New external single skin brick parapet walls were constructed and tied to the new inner block walls, incorporating flashings, joints and weep holes The old roof membrane was waterblasted, unsound coating removed and new coves installed A three layer torch-on membrane was applied to the roof including detailing into drains, around plinths, etc To roof areas outside the tank, a liquid membrane, reinforced with polyester fabric, was applied All parapet walls were finished off by installing a new powder coated aluminium capping Internal encapsulation of the parapet wall using torch-on membrane Finally, the external face of the brick parapet walls was primed and painted in a liquid membrane coating system Mineral finish membrane in place and detailing work completed This successfully completed stage one of the overall building rectification plan ACRA Awards for Excellence 2010 We were again entrants in this year s ACRA Awards for Excellence, and as corporate members we fully support the awards process This year we entered two projects: 175 Liverpool Street facade repair and protection in Category 6 Projects from $1 to $2 million and St Aloysious Chapel soffit repair and Out of Africa This article represents some community support in South Africa that we have become involved in It is included to possibly create interest in the organisation mentioned below as well as showing how a better education can be directly linked to future employment and business needs Our involvement at this point is to provide funding to the nongovernment education organisation, SchoolTrade SchoolTrade is an educational development organization based in Pietermaritzburg that uses innovative strategies to improve the quality of education in township and rural schools One of these strategies is to deliberately twin needy schools with more resourced schools in the region Recently the maths department of well-resourced Grace College twinned with the maths department of its poor neighbour, protection in Category 3 Projects up to $500k We were very pleased to receive our Merit Award for 175 Liverpool Street, which also involved ACRA corporate members Hyder Consulting and Parchem Construction Supplies Peter Smith received the award from ACRA president, Peter Johnsson Nontokozo from Edendale Technical High, and Tiffany from Grace College at one of the maths workshops between the two schools Edendale Technical High Over several months, the two departments arranged four creative interventions involving teacher training and peer education between learners One of those interventions was a meeting between teachers and a local engineering firm so that teachers could better understand the practical application of their subject The engineering firm benefited by linking with a future source of apprentices, cadet technicians and engineers Preliminary results suggest that these interventions have been helpful to learners and teachers from both schools The twinning project is not only helping to improve maths results but also helps to build relationships Our funds invested in the twinning project between the two schools might help to add a few more African engineers to the national skills base of the country As always should you want further information on a highlighted project, or have your own project to discuss, please contact John O Connell m: e: johnoconnell@preservetech comau Until our next update