engineering.
Oops! Looks like your browser is out of date. Is this page displaying correctly? If not, try upgrading your browser or use a different one.

Shrewsbury Flaxmill Maltings.

At the historic Shrewsbury Flaxmill Maltings industrial site in western England, AKT II has supported Feilden Clegg Bradley Studios and Historic England to regenerate the 1790s-built, Grade I-listed Main Mill building – the world’s first iron-framed structure, and the genesis of all modern steel-framed buildings – and its adjoined 1890s-built, Grade II-listed Kiln.

AKT II has restored the world’s oldest iron-framed structure – the genesis of all modern steel-framed buildings.

Location
Shrewsbury, UK
Client
Historic England
Architect
Feilden Clegg Bradley Studios
Project Value
£25 million
Floor Area
4,136 m²
Status
On-site

The wider campus contains six further heritage-listed buildings. Once complete, the Main Mill will rise out of the UK’s ‘Heritage at Risk Register’ and, together with the Kiln, will provide a mix of cultural and commercial spaces. The mill’s existing cast-iron frame is retained and repaired, with only subtle strengthening, while the building’s wider fabric is restored and rejuvenated. The Kiln meanwhile receives a new steel frame and lift core (its existing frame was irreparably corroded), while its roof is reconstructed in steel and timber.

Our approach goes beyond simple conservation. The Main Mill had already lived two long lives, first as a flax-mill and then a maltings. Our structural design strategy took everything back to first principles; through performance-based design we justified the additional capacity that gives the building a further life, while at the same time preserving its historic fabric.

By understanding the entire structure’s behaviour we were able to devise sensitive, discrete interventions that enhance the existing structure’s robustness and resilience. A new steel frame is inserted through the lower levels to provide capacity for the most overloaded existing columns, and presents only a few new columns within the final ground floor. Elsewhere, a system of ties and reinforced overlays provides alternate loading pathways to achieve an overall reliability. We sought out inherent strength within the existing frame and then targeted all interventions to sensitively enhance the frame’s apparent weaknesses.

Rescuing the timber elements within the Main Mill’s perimeter masonry walls required a complete integration of construction sequencing, temporary works and repair proposals. AKT II performed extensive investigations to understand the existing situation, and then led the integrated strategy.

Dubai
Creek
Footbridge.
 
The
Red Sea
 
Project.
Oxford
North
 
 
1–4 Marble
Arch.
 
 
Athletes'
Village.
 
 
Arding
&
Hobbs.
 
Grosvenor
Square.
 
 
Horizon
 
Building.
 
Canada
Water
Plot K1.
 
Cadogan
Place.
 
 
CASPAR
I.
 
 
Kivik
Pavilion.
 
 
One
Centaur
Street.
 
Nike
myThread
Pavilion
 
Museum
of the
History of
Science.
2-12
Symons
Street
 
Southwark
Gateway.
 
 
Brindleyplace
Café
 
 
Queen
Mary
Students'
Union.
30
Kensington
Church
Street
Burlington
Danes
Imaging Centre.
 
Bedford
Music
School
 
Royal
Holloway
Student
Residences.
Howe
Dell
Primary
School.
39-49
Wigmore
Street
 
1
Finsbury
Square
 
London
Bridge
Glass
Sculpture.
Hilton
London
Tower
Bridge.
Bishop Challoner
Catholic Collegiate
School.
 
Butterfield
Innovation
Centre.