Stand tall - CLT...development is Scotland’s tallest timber building. It is also Scotland's first multi-storey domestic CLT (cross-laminated ... with the CLT panels forming the
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Transcript
At seven storeys, construction firm
CCG (Scotland)'s recently
completed Ellerslie Road
development is Scotland’s tallest
timber building. It is also Scotland's first
multi-storey domestic CLT (cross-laminated
timber) building. Building Warrant approval
has set a precedent in the country, the
result of evidence supplied to Building
Standards Scotland, Glasgow City Council
and Scottish Fire & Rescue Services.
Built on the banks of the River Clyde at
Yoker, a town just west of Glasgow,
Ellerslie Road provides 42 one-, two- and
three-bedroom contemporary mid-market
rent apartments for Sanctuary Homes, part
of Sanctuary Group. The new building,
which was designed by MAST Architects,
optimises the efficiency of CLT with six
apartment modules arranged around one
central stairway in a ‘T’ shaped form.
Apartments are designed around a
standard template used by CCG for all
residential units, however CLT’s ability to
achieve long, uninterrupted spans has
allowed for a flexibility in the layout of
apartments from floor to floor which would
have been more constrained with
traditional forms of construction. Engineer
Smith and Wallwork was responsible for
the design of the cross-laminated timber
superstructure, working collaboratively
with solid wood specialist Eurban at detail
design stage to ensure a smooth offsite
manufacture and onsite assembly process.
The entire superstructure is built from
Stora Enso PEFC certified CLT including
the common areas and lift shaft.
Structural wallsThe lift shaft structural walls are formed by
100mm thick CLT panels tied together to
form a rigid tube with the shaft independent
from the CLT separation wall between lobby
and apartment. The CLT shaft is restrained
laterally at each of the seven floor levels
with the CLT panels forming the lobby slab
and capped with a 120mm thick CLT 'lid'
used to fix the hooks to install the lift without
the need for any steel lifting beam.
A bespoke platform is used to support
the superstructure due to the
lightweight nature of CLT and the
exposure to wind loadings along the
HOUSING & REGENERATION
river. The superstructure includes
design features to provide enhanced
resistance to disproportionate collapse
and this has encouraged the Institution
of Structural Engineers ( IStructE) to
start a review process for Part A3 –
Building Regulation Disproportionate
Collapse as it is recognised that there
are a number of forms of construction
that would benefit from a review.
Rigorous standards“This is the first major domestic CLT
building in Scotland and Scottish Building
Regulations are vigorous, requiring a
supervising engineer to sign off all
calculations prior to construction,”
comments, Simon Smith, Director at Smith
and Wallwork. “One of the key issues
when building with CLT is efficiency, in
terms of material use and standardisation.
“At Yoker we have managed to deliver
a standard CLT platform construction
using standard connection details and no
platform reinforcement. CLT use density is
0.29m3/m2, which is low considering the
tall and exposed nature of the site.
Earlier this year Sanctuary Homes completed the first major domestic cross-laminated timber(CLT) building in Scotland at Ellierslie Road in Yoker, near Glasgow. LABM has all the details.