{"id":11314,"date":"2007-01-01T13:52:38","date_gmt":"2007-01-01T13:52:38","guid":{"rendered":"http:\/\/www.newsteelconstruction.com\/wp\/?p=11314"},"modified":"2012-10-01T14:00:46","modified_gmt":"2012-10-01T14:00:46","slug":"new-look-for-hull-city-centre","status":"publish","type":"post","link":"https:\/\/www.newsteelconstruction.com\/wp\/new-look-for-hull-city-centre\/","title":{"rendered":"New look for Hull city centre"},"content":{"rendered":"
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The retail roof supports the mall\u2019s signature roof<\/p><\/div>\n

The new multipurpose St Stephen\u2019s development has benefited from a number of important steel elements including more than one mile of shop front steel.<\/h4>\n

<\/span>FACT FILE: St Stephen\u2019s development, Hull<\/h5>

Main client: <\/strong>ING Real Estate Development
\nArchitect:<\/strong> Holder Mathias
\nStructural engineer:\u00a0<\/strong>White Young Green + Hinde Carville Design
\nMain contractor: <\/strong>HBG Construction
\nSteelwork contractor: <\/strong>Bone Steel
\nProject value:<\/strong> \u00a3200M
\nSteel tonnage: <\/strong>1,700t<\/p><\/div>\n

The city of Kingston-upon-Hull has committed more than \u00a31.5bn on a raft of new developments during the past five years. These landmark projects are set to transform and reshape the skyline, with one of the largest on-going schemes being the 40-acre St Stephen\u2019s mixed use development.<\/p>\n

This city centre project sits adjacent to the main railway station and will comprise 30,000m\u00b2\u00a0of retail, 14,000m\u00b2\u00a0of leisure, 220 homes, a hotel, 1,550 car parking spaces and a new home for the locally acclaimed Hull Truck Theatre Company and the Albemarle Centre for children\u2019s music.<\/p>\n

Scheduled to be completed by the Spring of this year, the project is anchored by a large 10,200m\u00b2\u00a0Tesco supermarket which Jaime Greenock, Project Manager for Bone Steel, says is the largest steel element of the project requiring approximately 700t.<\/p>\n

The Tesco store is basically a large single-storey warehouse erected on top of a concrete slab. \u201cThis building was erected with multi-span columns and cellform rafters,\u201d Mr Greenock says.<\/p>\n

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All of the Tesco store\u2019s columns can take extra loading<\/p><\/div>\n

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Fourteen skewed columns support the music centre<\/p><\/div>\n

Although the 8.5m-high store is linked to an adjacent mall, it is an independent structure designed to incorporate large open plan areas. The building has a footprint of 120m x 84m and consists of 20 bays, each 6m deep.<\/p>\n

Stuart Hinde, Director at Hinde Carville Design (Bone Steel\u2019s design engineers) explains: \u201cAlternate \u2018hit and miss\u2019 internal columns give the client the required open plan store, resulting in 16.5m long cellbeam rafters on a 6m x 16.5m grid, and 12m long spine beams.\u201d<\/p>\n

However, what has made the Tesco store interesting, for those involved, is the 1,500m\u00b2\u00a0mezzanine level.<\/p>\n

\u201cOriginally a mezzanine level was in the client\u2019s plans, but we were later instructed to omit it,\u201d Mr Hinde says. \u201cHowever, in anticipation of it\u2019s reinstatement, we designed the building to work with or without the mezzanine. It has since been reinstated.\u201d<\/p>\n

Mr Greenock agrees and says: \u201cAll columns, external and internal, are capable of taking the extra floor level.\u201d By adding the mezzanine level, Bone Steel will supply another 200t of structural steelwork and approximately 1,500m\u00b2\u00a0of decking.<\/p>\n

However, reinstating the mezzanine level at a relatively late stage means the erection process will be a little challenging. The Tesco store is nearly complete, including the roof. Adding another floor level inside a finished building means doing the erection without the aid of any cranes.<\/p>\n

\u201cThere\u2019s no room inside for even a small mobile crane and the concrete slab probably wouldn\u2019t take the weight,\u201d Mr Greenock says. \u201cWe\u2019\u2019ll be using telehandlers to bring the steel into the structure and to do most of the steel erection.\u201d<\/p>\n

The entire project is centred around a curved 200m-long mall, covered by the development\u2019s signature steel wave-like roof. With the Tesco store situated at one end, there are retail outlets of differing sizes arranged along the mall on two levels. Although both sides of the mall are essentially concrete structures, there is some significant steelwork.<\/p>\n

A large steel roof covers the retail and cinema complex, which is situated on the mall\u2019s southern elevation. Constructed on top of concrete columns, the roof covers an area of some 10,000m\u00b2. Mr Hinde says, a lightweight steel roof for this concrete structure was always planned as it offers a quick and cost effective solution.<\/p>\n

Large open areas were important in the retail outlets and cinema complex, so cellbeams were predominantly used with some spanning up to 30m.<\/p>\n

\u201cAs the roof follows the curvature of the mall, most of the grids are different and this proved challenging in the design stage,\u201d explains Mr Hinde. \u201cWe also used cellbeams where necessary, instead of trusses, as this was more cost effective.\u201d<\/p>\n

\u201cErecting this roof meant we were continually punching off concrete,\u201d says Mr Greenock. \u201cSome of the concrete columns were cast with bolts which allowed the steel members to be easily installed, and on the perimeter columns there were cast in plates and we welded the beams to their fins,\u201d he adds.<\/p>\n

The roof also supports the adjacent signature roof over the mall. \u201cWe had to take the extra loading into account and use a robust bracing system,\u201d says Mr Hinde.<\/p>\n

Beneath the roof along the mall itself, Mr Greenock estimates Bone Steel will eventually supply and erect more than one mile of shop front steelwork and perimeter louvre steel around the outside of the Tesco store. \u201cMuch of this is dummy steelwork, covering up the concrete columns,\u201d says Mr Greenock. \u201cAesthetically, steel looks better than concrete.\u201d<\/p>\n

More than 400t of steel is being used for the eight level hotel which is being constructed on top of the development\u2019s concrete car park.\u00a0 Mr Greenock explains the decision to use steel for this part of the project. \u201c A steel-framed structure is lighter and also quicker to erect,\u201d he says.<\/p>\n

To the north side of the hotel stands the Albemarle theatre building which Mr Greenock says has been the most challenging aspect of the whole project.<\/p>\n

The steel-framed theatre consists of a main rectangular three-storey block with an elliptically-shaped music centre building attached to the front. \u201cThe music centre is oval and needed 14 skewed columns as its frame,\u201d says Mr Greenock. \u201cThey couldn\u2019t be conventionally bolted down using base plates because they\u2019d just fall over, so we had to tie them together with cross members using a frame.\u201d<\/p>\n

Bone Steel had to pre-assemble the steel frame on site and then build this frame into another frame. This then created the oval shape and the gaps were filled in with beams.<\/p>\n

\u201cThe structure had to be supported until the first concrete floor was poured,\u201d says Mr Greenock. \u201cUp to this point it wasn\u2019t stable.\u201d<\/p>\n

The oval-shaped music centre has a footprint of 150m\u00b2\u00a0and columns used ranged from 254 x 254 x 76 to 356 x 368 x 129 UKCs<\/p>\n

For logistical reasons the oval-shaped structure was erected first and then the rectangular block was built around it.<\/p>\n

Mr Hinde says the music centre structure lent itself to steel design. \u201cIt looks a little like a tee-pee. The geometry was again challenging, with both elliptical and radial curves to floor plans as well as a reducing footprint as you move up through the structure,\u201d he adds.<\/p>\n

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The project covers a vast previously derelict site adjacent to the city\u2019s main railway station<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

The new multipurpose St Stephen\u2019s development has benefited from a number of important steel elements including more than one mile of shop front steel. The city of Kingston-upon-Hull has committed more than \u00a31.5bn on a raft of new developments during the past five years. These landmark projects are set to transform and reshape the skyline, […]<\/p>\n","protected":false},"author":2,"featured_media":11315,"comment_status":"closed","ping_status":"open","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":[929,1518,184,47],"class_list":["post-11314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-feature","tag-bone-steel","tag-hull","tag-leisure","tag-retail"],"jetpack_featured_media_url":"https:\/\/www.newsteelconstruction.com\/wp\/wp-content\/uploads\/2012\/10\/2005467.jpg","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p3WsLP-2Wu","_links":{"self":[{"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/posts\/11314","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=11314"}],"version-history":[{"count":2,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/posts\/11314\/revisions"}],"predecessor-version":[{"id":11320,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/posts\/11314\/revisions\/11320"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/media\/11315"}],"wp:attachment":[{"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/media?parent=11314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/categories?post=11314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsteelconstruction.com\/wp\/wp-json\/wp\/v2\/tags?post=11314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}