{"id":1777,"date":"2011-10-01T09:12:03","date_gmt":"2011-10-01T09:12:03","guid":{"rendered":"http:\/\/www.newsteelconstruction.com\/wp\/?p=1777"},"modified":"2013-04-15T16:03:02","modified_gmt":"2013-04-15T16:03:02","slug":"a-steel-framed-jewellery-box","status":"publish","type":"post","link":"https:\/\/www.newsteelconstruction.com\/wp\/a-steel-framed-jewellery-box\/","title":{"rendered":"A steel framed jewellery box"},"content":{"rendered":"
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The roof was installed in prefabricated units and is supported on 32m long rafters<\/p><\/div>\n

One of the most ambitious heritage projects in recent times is underway at Portsmouth Dockyard. Martin Cooper reports on the construction of the finely crafted permanent home for the Mary Rose.<\/h4>\n

<\/span>FACT FILE: Mary Rose Museum, Portsmouth<\/h5>

Main client:<\/strong> Mary Rose Trust
\nArchitect:<\/strong>\u00a0Wilkinson Eyre Architects
\nInterior architect:<\/strong>\u00a0Pringle Brandon
\nMain contractor:<\/strong> Warings
\nStructural engineer:<\/strong> Gifford, part of Ramboll
\nSteelwork contractor:<\/strong> Rowecord Engineering
\nSteel tonnage:<\/strong> 400t
\nProject value:<\/strong> \u00a335M<\/p><\/div>\n

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The structure\u2019s rounded ends are designed to resemble a ship\u2019s hull<\/p><\/div>\n

Described as one of Britain\u2019s most important archaeological finds, King Henry VIII\u2019s naval flagship the Mary Rose, will soon be housed in a new purpose built museum alongside thousands of objects which were salvaged with the ship\u2019s hull in 1982.<\/p>\n

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Since being raised from The Solent thirty years ago, the remnants of the ship and its artefacts have captured the public\u2019s imagination and thousands visit the current museum in Portsmouth Dockyard every year.<\/p>\n

The preserved objects offer a unique insight into the life and times of a Tudor warship as many of the artefacts have remained unscathed since the fateful day in July 1545 when the Mary Rose sank.<\/p>\n

About 1,000 of the 1,900 recovered objects are currently on display in the existing museum – the new facility will have more space for exhibits – while the hull itself has been undergoing preservation work, housed in a temporary structure in a nearby dry dock.<\/p>\n

The project, largely funded by a grant from the Heritage Lottery Fund, will see the Tudor warship finally ensconced in a permanent building, positioned over this dry dock in which the Mary Rose currently sits.<\/p>\n

For the Mary Rose Trust, the project represents a dream come true. \u201cIt will combine the two halves for the first time,\u201d says the Trust\u2019s Chris Dobbs. \u201cVisitors will soon be able to view the preserved hull right alongside many of the ship\u2019s objects.\u201d<\/p>\n

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Clad in black timber, the museum takes shape next to its neighbour HMS Victory<\/p><\/div>\n

Having won a design competition in 2004, Wilkinson Eyre and Pringle Brandon\u2019s concept revolves around the preserved starboard portion of the hull sitting in the middle of the new boat-shaped structure. A sort of pearl within its oyster shell, as architect Chris Wilkinson describes it.<\/p>\n

Within the museum there will be three visitor galleries, corresponding to the principal deck levels of the ship. These will run the length of the building, imitating the missing port side of the vessel and allowing the original artefacts to be displayed in context.<\/p>\n

All through the construction process the hull has remained in the middle of the project, in its \u2018hot box\u2019 –\u00a0 a tent-like structure in which air-drying is proceeding, a conservation process which will not be completed until 2016. Until then visitors will be able to see this process through viewing ports positioned along each of the gallery levels. On completion of the air-drying phase, the \u2018hot box\u2019 will be removed, allowing visitors new and dramatic views of the ship\u2019s original timbers.<\/p>\n

The new museum has also been described as a finely crafted, wooden jewellery box, as it will be clad in timber planks both reflecting the structure of the original ship and the nearby HMS Victory. The planks will be painted black and inscribed with carvings used by crew to identify their personal belongings.<\/p>\n

Constructing a building which not only encases the ship\u2019s hull but also the dry dock in which it nestles has thrown up a number of construction challenges. The dock itself is a Scheduled Ancient Monument, so there was a requirement for minimal interference to the original stonework. Something lightweight was needed; a structural frame which could also span the dock without interfering with the conservation work going on in the midst of the site.<\/p>\n

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Rowecord had to design and install a series of complex multi-hub connections<\/p><\/div>\n

\u201cThe complex shape of the structure and the need for a lightweight solution meant steel was the only real choice,\u201d explains Ben Rowe, Gifford Technical Director.<\/p>\n

The building\u2019s main steel columns sit on pads, which are isolated from the dock\u2019s stonework by a structural membrane. The pads not only protect the dock but also distribute the structure\u2019s loads evenly.<\/p>\n

From the dock the steel frame rises up and encloses the hull in an elliptically shaped structure. The frame also includes two pavilions, on the north and south side of the structure, one will house the entrance foyer while the other will accommodate an educational suite.<\/p>\n

The building\u2019s irregular shape has been formed with a number of faceted columns which rise outwards from the pads and then rake inwards to create the appearance of a ship\u2019s hull. The crank or change in direction happens at a number of multi-connections, positioned approximately 3m from ground level, a point which is nearly a third of the way up the building\u2019s side.<\/p>\n

Each of these hub connections, designed by Rowecord Engineering, not only accept the two columns sections, but also cross beams, floor beams and tubular bracing. All of the connections were prefabricated off-site and this ensured these complex pieces of steelwork arrived at the project in the required exact configuration.<\/p>\n

The main columns forming the building\u2019s rib cage are spaced at 5m intervals, while\u00a0 the internal columns are spaced at 3m intervals, a width that means these structural bays match the original size of the Mary Rose\u2019s gun ports.<\/p>\n

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Inside the completed museum, galleries corresponding to deck levels will seperate the hull from the ship\u2019s objects<\/p><\/div>\n

\u201cSteelwork was erected one bay at a time, using some temporary propping,\u201d explains Nicolas Beausseron, Warings Project Manager. \u201cHowever once the bracing, which is curved to match the perimeter shape, was installed, each bay was stabilised, allowing the next bay to be erected.\u201d<\/p>\n

More steelwork is connected to the perimeter columns, to form the visitor and object galleries that encircle the museum\u2019s interior. The visitor galleries curve, to mimic a ship\u2019s deck, and these were formed by staggered beams supporting the flooring.<\/p>\n

The lower ground floor of the museum houses not only the hull\u2019s \u2018hot box\u2019 but also an array of necessary equipment and plant for ongoing conversation work. So as not to interrupt the important work taking place, two large trusses span this plant area, forming a large column free zone.<\/p>\n

\u201cPrior to installing these trusses a crash deck was installed, during the enabling works, to protect the equipment,\u201d says Mr Beausseron.<\/p>\n

Interestingly, when the conservation work is complete in 2016 and all of the equipment is removed, this area will become a new public gallery. Positioned at lower ground floor level, it will offer visitors another view of the unwrapped hull.<\/p>\n

Topping the boat-shaped museum is an elliptical roof, which was prefabricated off-site and lifted into place over the dock, again minimising disruption to the conservation activities and following a precise methodology to reduce the risk of objects falling on to the hull. Supporting the roof are a series of 32m-long curved rafters, installed in three sections, to avoid having to work and bolted up the steelwork above the \u2018hot box\u2019.<\/p>\n

Steelwork erection and the installation of the roof was completed during August. Internal fit-out has now started with the museum scheduled to open at the end of 2012. Meanwhile, preservation work continues apace on the Mary Rose hull and it will be carefully dried out within the new facility until being finally unveiled in 2016.<\/p>\n

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From 2016 onwards the preserved hull will be unwrapped after conservation work has been completed<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

One of the most ambitious heritage projects in recent times is underway at Portsmouth Dockyard. Martin Cooper reports on the construction of the finely crafted permanent home for the Mary Rose. Described as one of Britain\u2019s most important archaeological finds, King Henry VIII\u2019s naval flagship the Mary Rose, will soon be housed in a new […]<\/p>\n","protected":false},"author":2,"featured_media":1778,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[29,334,69,23],"class_list":["post-1777","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-feature","tag-london","tag-mary-rose","tag-museum","tag-rowecord-engineering"],"jetpack_featured_media_url":"https:\/\/www.newsteelconstruction.com\/wp\/wp-content\/uploads\/2012\/05\/DSC_6442.jpg","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p3WsLP-sF","_links":{"self":[{"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/posts\/1777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/comments?post=1777"}],"version-history":[{"count":4,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/posts\/1777\/revisions"}],"predecessor-version":[{"id":16759,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/posts\/1777\/revisions\/16759"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/media\/1778"}],"wp:attachment":[{"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/media?parent=1777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/categories?post=1777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/tags?post=1777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}