In a recent case in the Court of Session
in Edinburgh Lord Drummond Young decided that although building services
drawings had been described as "fully coordinated and approved
for construction", this did not necessarily mean the drawings
in question were ready for installation. Some further background is
required to explain this decision.
The dispute arose out of a subcontract for the electrical installations
for the New Royal Infirmary and Medical School in Edinburgh. Following
difficulties between the main contractor and an earlier subcontractor
for the electrical services, Emcor Drake and Scull had been engaged
to carry out phase 2 of the works. The subcontract made it clear that
Emcor was not responsible for the design of the electrical installations,
but nevertheless Emcor wished to put together a realistic price for
the works against the background that a rapid start on site was envisaged.
Accordingly Emcor qualified its tender and subcontract with the words
"Our bid has been prepared on the understanding that the vast
majority of tender drawings received are fully coordinated and approved
for construction". Disputes arose concerning the meaning of this
qualification and these were referred to the court as a preliminary
issue.
Lord Drummond Young commented upon the complexity of the building
services on a project of this type. The services typically included
lighting and power cabling, plumbing and drainage, central heating
and air conditioning, fire alarm and emergency lighting systems, medical
gases and nurse call systems. The main distribution for these services
ran through the corridors of the building at high level in the ceiling
void.
The distribution network and connections of each of those services
would be indicated in the mechanical and electrical engineers' design
drawings and in those drawings a degree of coordination would be involved
to satisfy, for example, that there would be adequate space in the
ceiling void to accommodate all the services.
Lord Drummond Young characterised this as the first stage of the coordination
of service drawings. This was confirmed by the drawing protocols annexed
to the subcontract in which it was stated that the services engineer
was to "spatially coordinate the services with the structure"
in producing design drawings.
A second stage of coordination of services drawings occurred after
completion of the engineer's design drawings. This was the responsibility
of the various specialist subcontractors engaged for the installation
of those services. This involved identifying the precise routes to
be taken by the ducting or piping for the different services in such
a way as to avoid any clashes. In carrying out this activity, each
specialist subcontractor must prepare detailed working drawings which
can be used by its employees to install the service in question. These
define precisely where the service is to run, including heights, and
the components that are to be used including bracketry and other fixings.
This work is generally carried out by CAD operators who produce multi-layered
coordination drawings showing all of the services.
Lord Drummond Young held that the drawings provided to Emcor with
the tender package were of a status which was "approved for construction",
but these were design drawings rather than detailed working drawings.
Indeed, it was not in dispute that an electrical engineer who looked
at the tender drawings would have realised that they were design drawings
and not detailed working or installation drawings. The drawings lacked
invert levels, lacked fixing points for bracketry to support the electrical
containment and did not indicate how maintenance access to adjacent
services was to be preserved.
Moreover, in relation to the general contractual background, other
terms of the contract clearly placed a considerable onus on Emcor
to check the drawings provided for the purpose of the subcontract.
These provisions were inconsistent with any argument that the main
contractor had warranted that the drawings provided at tender stage
required no further development to ensure coordination with other
subcontractors. The court also had to take into account that at the
time when Emcor began work on the electrical installations, it already
had very extensive knowledge of the way in which the services were
to be accommodated within the building, having already been engaged
for installation of the heating and plumbing installations.
In conclusion, Lord Drummond Young held that the expression "fully
coordinated" referred to the first stage of coordination, not
the second. The expression "approved for construction" simply
meant that the drawings in question must have attained final release
status, where no further revisions would be required except in the
case of minor amendment. The qualification of the subcontract therefore
meant no more than that the tender drawings relied upon by Emcor in
fixing its price were of a sufficient quality to comply with the first
stage of the design coordination process. Emcor retained the obligation
to develop those drawings into installation drawings to fulfil the
second stage of coordination.
In effect, fully coordinated meant only partly coordinated; Emcor
were not entitled to assume that the tender drawings would generally
have reached the stage of development where installation drawings
could immediately be issued to its operatives on site.
- Geoff Brewer
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