View source for Haywards Heath Station Quarter Waitrose store

==Article in [http://www.newsteelconstruction.com/wp/wp-content/uploads/digi/NSCJuly2016digi/index.html#/14/ NSC July/August 2016]==
{{#image_template:image=File:Haywards_Heath_SQ-1.jpg‎|align=right|wrap=true|caption=Sitting atop the store are the saw-toothed roofs of the back-of-house facilities|width=500}}
'''Retail arrives at Sussex station'''<br>
The [[Construction|construction]] of a Waitrose [[Retail_buildings#Supermarkets|superstore]] and accompanying [[Car_parks|car park]] represents the largest element of the £35M Haywards Heath station upgrade.<br>

Big changes are afoot in and around Haywards Heath railway station, as the East Sussex town seeks to regenerate its transportation hub. Solum Regeneration, a partnership between Network Rail and Kier, working closely with Southern Rail, and Waitrose, have all combined on this £35M scheme. Ultimately, the overall Station Quarter development will deliver an integrated transport hub; a four-level [[Car_parks|multi-storey car park]] ([[#Multi-storey car park|see below]]); an enclosed [[Design_of_steel_footbridges|footbridge]] linking the [[Car_parks|car park]] and the station platforms; an enhanced public realm around the station, and a Waitrose [[Retail_buildings#Supermarkets|superstore]] with its own dedicated parking.

BAM Construction is the main contractor for the [[Braced_frames|steel-framed]] Waitrose part of the development and it started on site during April last year. The plot of land adjacent to Haywards Heath station was formerly occupied by a bus transfer station and a large surface car park for rail passengers. “We had to liaise with the team constructing the [[Car_parks|multi-storey car park]], because until it was open we had to keep a portion of the existing car park open and consequently couldn’t take possession of the entire site,” explains BAM Construction Project Manager Alan Newland.

BAM started by levelling part of the sloping site in preparation for the [[Braced_frames|steel frame]] of the Waitrose store and [[Car_parks|car park]] to be [[Construction#Steel erection|erected]]. This involved the removal of some 19,000m<sup>3</sup> of overburden, which required a total of 2,500 truck movements.

The [[Braced_frames|steel-framed]] Waitrose store consists of a lower level 2,300m<sup>2</sup> store and café that is dug into the previous slope and is partially subterranean along one elevation. An upper level accommodates back-of-house and storage facilities, and [[Car_parks|car parking]] for 60 vehicles. Taking in the sloping topography, the upper level car parking area of the [[Braced_frames|steel frame]] then joins a ground level surface parking lot.

The upper [[Car_parks|car park]] deck comprises a 165mm deep [[Composite_construction#Composite slabs|composite slab]], primarily supported on a series of [[Steel_construction_products#Cellular beams|cellular beams]]. These beams are up to a maximum depth of 761mm, and are supported by a series of 914mm deep [[Steel_construction_products#Standard open sections|UB sections]]. The lower level of the steel structure accommodates the Waitrose sales area and column intrusions had to be kept to a minimum in this area, according to BAM Design structural engineering team member Kangaichelian Sirijeyanantham.
{{#image_template:image=File:Haywards_Heath_SQ-3.jpg‎|caption=The Waitrose store is the largest part of the station upgrade scheme|width=600}}
“As well as the required [[Multi-storey_office_buildings#Flexibility and adaptability|long span qualities]] a steel frame gave us, the other reasons the design team went with this form of framing solution is that it is more [[Multi-storey_office_buildings#Value for money|economical]] and [[Multi-storey_office_buildings#Speed of construction|faster]].” Other advantages the project team has gained from the [[Design|design]] are that [[Steel_construction_products#Cellular beams|cellular beams]] throughout the steel frame have allowed [[Service_integration|building services to be accommodated within the beam depth]], while at ground floor, in addition to carrying the vertical loads, the [[Floor_systems|floor system]] also acts as a [[Braced_frames#Horizontal diaphragms|diaphragm]] to transfer lateral forces from the perimeter retaining walls.

Also sitting on the upper level and atop one of the main store elevations is a back-of-house area that includes a loading bay, storage facilities and offices. The superstructure of this area comprises a two-storey steel frame topped by a saw tooth profile roof formed by a series of high-level [[Trusses|trusses]].

Also on the upper level the steel frame includes a lobby structure housing a travellator and passenger lifts that connects the [[Car_parks|car park]] with the sales floor below. This small structure is stabilised by a [[Continuous_frames|moment frame]] together with the concrete [[Concept_design#Concrete or steel cores|core]] walls that form the adjacent lift shafts. Meanwhile the majority of the steel structure gets its [[Concept_design#Structural options for stability|stability]] from vertical and [[Braced_frames#Horizontal bracing|horizontal cross bracings]].

According to steelwork contractor Elland Steel Structures, [[Construction#Steel erection|steel erection]] was a challenge because of the site constraints. Using a single 70t-capacity [[Construction#Mobile cranes|mobile crane]] for its entire steel programme, that also included the [[Construction#Installation of metal decking|installation of metal decking]], Elland Steel Structures [[Construction#Steel erection|erected]] the majority of the frame from outside of the structure’s footprint. “As we had to [[Construction#Steel erection|erect]] the sales area first, which is below ground level in parts, it was easier to stand the [[Construction#Mobile cranes|crane]] just outside of the footprint,” explains Elland Steel Structures Commercial Director Jeremy Shorrocks. “The only exception to this was the initial part of the [[Construction#Steel erection|erection]] process which involved installing the steelwork furthest from our preferred [[Construction#Mobile cranes|crane]] position.” For this part of the work, a temporary ramp was installed to allow the [[Construction#Mobile cranes|crane]] access to the sales area.

Elland completed the steel programme in May and the Waitrose store is due to be completed in October.

==[[Car_parks|Multi-storey car park]]==
{{#image_template:image=File:Haywards_Heath_SQ-2.jpg‎|align=right|wrap=true|width=300}}
Built by Bourne Parking (part of Bourne Construction Engineering) acting as both main contractor and steelwork contractor, the station’s new [[Car_parks|multi-storey car park]] opened earlier this year. It is operated by Indigo Park Solutions on behalf of Southern Railway. The structure acted as a catalyst for the Waitrose part of the development as once it was open the adjoining surface car park could be closed and the [[Construction|construction]] of the [[Retail_buildings#Supermarkets|superstore]] begin.

The [[Car_parks|car park]] has four levels, consisting of a ground level and three suspended floors accommodating 1,056 car spaces. Built around a 16m x 7.2m [[Concept_design#Floor grids|grid]], the structure required 960t of steelwork. The [[Braced_frames|braced frame]] was [[Construction#Steel erection|erected]] around three concrete [[Concept_design#Concrete or steel cores|cores]] and it supports [[Floor_systems#Precast units|pre-cast concrete flooring planks]].

“Logistics was the biggest challenge on this project as we had to work adjacent to an existing car park and busy railway lines,” says Bourne Parking Project Manager Kevin Clarke. “We had to ensure our [[Construction#Mobile cranes|cranes]] didn’t overslew the adjacent car park and railway and we had to [[Construction#Steel erection|erect]] the steel frame in a sequence which ensured, in the event of an accident, it couldn’t fall on to the rail tracks. This was done by [[Construction#Steel erection|erecting]] the sections of the [[Car_parks|car park]] furthest from the rail lines first, and once we  had a stable structure the last bays along the Network Rail boundary were [[Construction#Site bolting|bolted]] onto this [[Braced_frames|braced frame]].”

{|class="wikitable" width="400"
|-
|'''Architect'''||Pozzoni Architecture
|-
|'''Structural Engineer'''||BAM Design
|-
|'''Steelwork Contractor'''||Elland Steel Structures
|-
|'''Main Contractor'''||BAM Construction
|-
|'''Main Client'''||Solum Regeneration
|}

[[Category:Case studies - Retail buildings]]