Longley Place

The Longley Place project is a build-to-rent scheme funded by Legal & General. The development, set around a landscaped podium deck, comprises four blocks ranging from 11 to 20 stories.

Located on an industrial site in close proximity to the rail station, the development – built on a sloping site – offers two sub-levels provided by means of a retaining wall which varies in height from 4.5m to 2m. Temporary works wall solution considers sheet piles ground-anchored to free up activities in the heavily constrained site, subsequently replaced by a reinforced concrete retaining wall in the permanent case.

Lowest slab level is home to various plant, back of house and car-parking facilities, whilst the two floors above deliver two levels of office space. Circa 200 residential units are located in the remaining upper floors, catering for a range of bedroom number formats and tenure types.

Key Technical Challenges

Basement wall retention system using ground anchors
Perimeter columns protruding past slab edge as part of masonry faced detail
Determination of weak spots in chalk substrate
Careful co-ordination of BWIC on Level 1 transfer slab

Key Innovation

Early detailed slab design attracted savings in slab thickness, thus allowing for additional floor and helped reduced the number of columns.

Sustainability

VE to perimeter columns – reducing costs of support bracketry and reducing internal columns
Upon appointment, RBG reduced slab thickness by 20%

RBG Value Add

Upon appointment, RBG reduced slab thickness by 20%
Added one floor to blocks
VE to perimeter columns – reducing costs of support bracketry and reducing internal columns
Additional fees should have been sought for four month programme prolongation due to delay in getting contractor in contract.
Rebar fees from work share partner grossly underestimated; get partner to determine no of sheets and commit to paying for own mistakes.
Know contractor’s preferred format for rebar schedules, e.g. separate column lifts
MEP engineer tender design was not to high standard; abortive costs leading to Civils redesign

Project Metrics

Project Value:

£80 Million

Year Completed:

Anticipated 2022

Project Metrics:

106,000sqft 1,2,3 & 4 bedroom lateral apartments 10,000sqft gym& spa and 2 swimming pools

Environmental Performance:

BREEAM Excellent HQM Four Star

Sectors:

Residential & Retirement

RBG Client:

Legal & General

End Client:

Legal & General

Architect(s):

EPR

Main Contractor:

No Data

RBG Services:

Civil Engineering, Construction Engineering, Geotechnical Engineering, Structural Engineering