18 © Daniel Shearing NEW DEVELOPMENTS
CLT stands tall on Dalston Lane
L
ocated in the London borough of Hackney and standing at 33.8 metres at its highest point, Dalston Lane is one of the tallest structures yet built in timber worldwide. It is thought to be the world’s largest
load-bearing CLT building yet completed, with the greatest volume of the material in one contiguous structure. The largest timber panels of the mixed-use residential and commercial
scheme measure 12 metres long by 2.8 metres high. In line with Hackney borough’s timber-first approach, the entire frame is of CLT, from the external walls, to party and core walls, right through to floors and stairs. Ranging from five to 10 storeys , the CLT building developed by Regal
Homes and delivered by B&K Structures incorporates 121 residential units comprising contemporary designed one to three-bedroom apartments – spread across nine floors and with a total gross external area of 11,591 m2 The residential units include 101 private rental units, five intermediate,
.
‘more affordable’ units which “bridge the gap between open market value and social housing,” and 15 affordable rental units. Commercial space, with a total gross internal area of 3,600 m2
– is mainly
located in the basement and ground floor levels, although the link structure between the residential units houses prime office
space.The construction is 90 minute fire rated, with 120 minutes for the stairs and lift elements, together with the parts over six storeys. Andy Goodwin, managing director for B & K Structures, commented: “All
credit to the borough of Hackney for their approach and Regal Homes for investing in this pioneering project. We formed an outstanding partnership with the architects Waugh Thistleton and timber-engineering experts Ramboll to deliver this vast project which has generated global attention – putting Hackney firmly on the map as a world leader for timber construction.”
SUSTAINABILITY The building’s intricate brickwork references both the surrounding Victorian and Edwardian housing and the craftsmanship-like detailing of local warehouses. As well as meeting the need for high quality, high-density housing, the ground-breaking use of timber technology has significantly reduced the carbon footprint of the building in terms of both material production and onsite time and energy consumption. The volume of timber used is calculated at 4,649 m3
of steel beams used – achieving 3,576 tonnes of sequestered carbon and 976
DALSTON LANE PROJECT DETAILS:
Client: Regal Homes Main Contractor: Regal Homes Construction Limited Architect:Waugh Thistleton Structural Engineer: Ramboll UK Ltd Structural Frame Provider: B & K Structures Key materials: Cross-laminated timber, concrete and steel
tonnes CO2e of embodied carbon. This means a net carbon footprint of 2600 tonnes CO2e – and when compared to an equivalent block with a concrete frame, with over 2,000 tonnes CO2e – a saving of around 4,600 tonnes CO2e. To put this in perspective, the carbon removed from the atmosphere in
the building of Dalston Lane using cross laminated timber as the core structural solution, is equivalent to the emissions produced by 1703 cars over a year. If each of the 121 households in the development were to buy a car they could run it for 14 years without producing a carbon footprint.
LIGHTWEIGHT BENEFITS Supported by a raft foundation, as piled foundations could not be considered due to the proximity of the HS1 rail tunnel and the proposed Crossrail tunnel, the robust, yet lighter weight cross laminated timber structure was a major benefit to the project. Using CLT as the core structural solution permitted additional floors within the loading restrictions, offering the developer a better return on investment.
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, with only seven tonnes
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