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Steel Designers' Manual - 6th Edition (2003)
materials delivered to site should be stored and stacked carefully in designated
areas to ensure that damage to those materials does not occur.
Within the method statement, an approved testing and inspection plan will
have been agreed to ensure that the as-built frame conforms to specification and
design intention. BS DD ENV 1090–1 10 Execution of steel structures, General rules
for buildings defines the plan fully. However, as a guide, the following should be
monitored:
(1) The building position is in accordance with the tolerances laid down.
(2) The methods of construction have allowed for process quality control, and the
tracing of components from supply source to completion.
(3) The construction has not deviated from the design requirements or
specification, without all changes being approved by the appropriate body,
and a full record kept of those changes.
In the case of the alignment of the structure, the dimensional survey should include
the location, zone or area tested. This should include the tolerance the survey has
been carried out to. Survey results should be transposed onto a drawing, noting the
location surveyed, and any deviations from line and level. Any out-of-tolerance
areas should be highlighted and a non-conformance report (NCR) instigated to
enable the design engineer to approve or reject the change.
Bolting or welding should be carried out to plan to enable ease of monitoring and
signing off. In multi-bolt connections, as the bolt is tightened, it should be marked
to ensure all bolts are adequately secured. It is often a good idea to require
the operative who has tightened complex connections to initial each connection,
and for management to record those connections. A drawing showing progress and
areas completed should be kept and handed over to the customer as and when
appropriate.
33.7.2 Non-conformance procedures
Quality control 987
During the construction of a building, modifications to the existing structure or
repairs to the new members may be necessary. All variations after the work has
started must be accompanied by an NCR, traceable throughout the entire process
and signed off by the design engineer.
• Any damage or discrepancy should be reported using the NCR system and
repaired or replaced following this approved system.
On completion of the project a register with a copy of all NCRs should be given
to the customer. This should include site location drawings, sections, sketches, test
certificates, etc., to help complete the building’s log and ensure that all parties are
aware of the changes made. A typical NCR form is shown in Fig. 33.7.