Recent Projects
Below is a list of projects we have recently worked on:
- O2 Car Park
- Crown House, London
- University Campus of Suffolk, Ipswich
- Chelsea Academy Sports Hall Roof
- Great West Quarter Tower, Brentford
- Guildhall Square, Southampton
O2 Car Park
| Client: | O2 |
|---|---|
| Main Contractor: | Foundation Developments Limited |
| Structural Engineer: | Walsh Associates |
| Construction Period: | April to August 2009 |
Design and Construct Project by FDL in which PSC were responsible for the design, supply and installation of the post-tensioning to the car Park flat slabs. A particular feature of this project was the 16 m x 9.6m grid, pushing the limits for a 400mm thick flat slab with fairly small section columns necessitating heavy punching shear details. The floor plate was divided into four roughly equal pours with a conventionally reinforced construction joint connecting between them.
 Flat slab level 1 pour 3 installation. Final checks prior to concrete pour |
 Level 1 soffit, highlighting expansive clear space between columns for freedom of parking |
Crown House, London
| Client: | UK Kingsway Ltd |
|---|---|
| Main Contractor: | ISG |
| Frame Contractor: | FDL |
| Structural Engineer: | Thornton, Thomasetti, Postawa de Hoog |
| Construction Period: | January 2009 to February 2010 (concrete frame only) |
The project was for the construction of a post-tensioned concrete frame for a commercial building as an alternative to a structural steel frame behind the retained existing facade of the original building. PSC designed and detailed the slabs from Ground level to Level 9 and installed the bonded flat slab post-tensioning system.
Stressing access was restricted by the facade along the front face of the building requiring the extensive use of top of slab pans. Each floor plate was divided into two pours joined by a conventionally reinforced infill strip poured at a later date.
The facade is retained by steel angles bolted to the floor slab and the structure steps back at level 6, 7 and 8 requiring post-tensioned transfer beams to support the offset columns.
Level 9 transfers the loads from the structural steel frame of the residential tower above.
 Bonded flat slab tendons installed with concrete pour underway at Crown House |
University Campus of Suffolk, Ipswich
| Client: | University Campus Suffolk |
|---|---|
| Main Contractor: | Willmott Dixon Construction Ltd |
| Frame Contractor: | FDL |
| Structural Engineer: | AECOM |
| Construction Period: | July 2009 to February 2010 (frame only) |
PSC Ltd is responsible for the design and installation of post-tensioned flat slabs on the project between level 1 and roof (6 levels in all). The slab is constructed in one pour and is varies in depth between 400mm and 350mm. Ancon fixable dowels have been employed to separate one of the two cores prior to stressing so as to allow shrinkage and movement. The dowels are grouted at a later date to provide a positive connection between slab and core for stability.
Punching shear reinforcement is provided by shear stud rail to minimise reinforcement congestion. The post tensioning system 15.7mm bonded flat duct construction.
 Bonded post-tensioned slab concrete pour at University Campus, Suffolk, Ipswich |
 Bonded post-tensioned slab at University Campus, Suffolk, Ipswich showing shear rail column head detail |
Chelsea Academy Sports Hall Roof
| Client: | Wates Construction Ltd |
|---|---|
| Frame Contractor: | FDL |
| Structural Engineer: | Campbell Reith |
| Construction Period: | October 2009 November 2009 (roof only) |
PSC Ltd supplied the bonded post-tensioning system and carried out the design and detailing for the sports hall roof, which has a MUGA all weather sports surface applied above it. The hall has major spans of more than 19m requiring the use of post-tensioned band beams. The slab is 175mm in general spanning between the beams with 225mm in the longer end span. The beam depth was kept minimal (750mm), so as to provide maximum headroom below. The in-situ post-tensioned alternative was utilised to replace the original structural steel beamed frame, which presented logistical problems for transport and lifting in the narrow congested streets surrounding the structure.
 Bonded post-tensioned Band beam with tendons in flat ducts at Chelsea Academy Sports Hall |
Great West Quarter Tower, Brentford
| Client: | Barratt Homes |
|---|---|
| Frame Contractor: | J. Reddington Ltd |
| Structural Engineer: | Winward Dexter |
| Construction Period: | June 2009 ongoing |
PSC Ltd is supplying and installing a 15.7mm bonded flat slab system for construction of floors from Ground level to level 26. The structure is oval in shape with the post tensioning is used to introduce longer spans and reduce the slab thickness.
 Floor Plan of Great West Quarter Tower |
Guildhall Square, Southampton
| Main Contractor: | Dawnus Construction Ltd |
|---|---|
| Frame Contractor: | J Reddington Ltd |
| Construction Period: | August to October 2009 (frame only) |
PSC Ltd supplied and installed the 15.7mm un-bonded post-tensioning system for the floor slabs between Ground level and Level 4 for the structure in two pours each. The solution allowed fast cycle times for the reinforced slabs allowing quicker stripping of the formwork than in conventional reinforced concrete construction.
 Un-bonded flat slab construction at Guildhall Square, Southampton |
 Un-bonded anchors in banded layout at Guildhall Square, Southampton |