1.5 PROGRAMME
1.5.1 Detailed Programme
1.5.1.1 The contractor shall provide a detailed programme to show the planned timing of the
various items of work to be done,
including:
(a) Alternative / Connection design calculation submission and approval
(b) Preparation and submission of construction information
(c) Order and delivery of materials
(d) Fabrication / Manufacture
(e) Application of Protective Coatings
(f) Transport
to
Site
(g) Assembly and Erection
1.5.2 Inspection and Testing
1.5.2.1
The Contractor shall provide a detailed programme and include in the programme
the
necessary time for all procedural trials, inspection and testing, and trial
assemblies, if
required. The Contractor
shall also
make allowance
for the time required by the ITA to carry out cross-checking of the Contractor’s testing.
1.5.3 Progress
1.5.3.1 The Contractor shall present the programme in a manner that the actual progress can be monitored against each item.
1.6 QUALITY ASSURANCE/ QUALITY CONTROL
1.6.1 The Fabricator shall provide and document all inspection, testing and quality control
for structural steelwork throughout the fabrication and erection of the works.
1.6.2
Materials and workmanship
shall be submitted
for inspection
and testing in
mill, shop and/or field by SCI and/or Testing Agency. Such inspection and testing does not relieve the Contractor of his responsibility to provide his own inspection, testing and
quality control as necessary to furnish materials and workmanship in accordance with
requirements of the Agreement.
1.6.3
The
fabricator shall maintain the inspection and quality control of his shop and field work. Quality control and inspection of welding work shall consist of meticulous supervision by
the
Contractor's welding inspector using non-destructive spot testing at not less than but not limited to the following rates and depending upon performance, the percentage of inspection shall be increased.
1.6.4 The Testing Agency shall carry out the following tests on the welds as directed by SCI
in accordance with the British Standards indicated:
c) Magnetic-particle test
to
BS EN ISO 9934-1. d) Dye-Penetration test to BS EN
571-1.
Weld Type
|
Test
|
Full
penetration butt
welds
|
50% radiographic (RT) or ultrasonic testing (UT)
and 50%
magnetic
particle (MT) or dye
penetrant testing (PT). (for site welds the above
will be 100%)
|
Partial
penetration
butt
welds
|
Minimum 25%
ultrasonic
(UT) and
25% magnetic particle (MT) or dye penetrant testing
(PT). (for site welds the above will be 50%)
|
Fillet
welds
|
Minimum 20% magnetic particle (MT) or dye penetrant testing (PT). (for site welds the above
will be 50%)
|
1.6.5
Non-destructive testing shall be done by
radiographic, magnetic particle or ultrasonic method, whichever is the most effective for the joint to be tested. Testing of welds
shall be carried out by qualified personnel.
All the results of such tests shall be submitted to SCI.
1.6.6
The fabricator shall notify SCI and the Testing Agency prior to the commencement of
any fabrication, erection, or other phases of work so as to allow them
reasonable opportunity to inspect
the work.
1.6.7 The fabricator shall facilitate inspection and testing by SCI and shall, at his own expense,
furnish the following, upon request:
a) Complete
sets of approved
Shop Drawings and
corrective work procedures at fabricating shop(s) and in the field.
b) Cutting lists, order
lists, material
bills, and shipping lists.
c) Information as to time and place of all rollings and shipments of material to shops and field.
d) Representative sample pieces requested for
testing as selected by SCI.
e)
Full and ample means and assistance for testing materials, and proper facilities for inspection of work, in mill, shop and field including access
ladders, scaffolding, lighting and protective gear.
1.6.8
Welding acceptability criteria shall be based on AWS D1.1-1988 and all NDT results
on this project
shall be assessed on this basis.
1.6.9 The fact that steelwork has been accepted at the shop shall not prevent its final rejection at the job site, or even after it has been erected if it is found to be defective in any
way.
1.6.10
The fabricator shall
provide all necessary arrangement
for SCI and his representatives
to inspect
the production
in
the factory, place of assembly
and erection on site. Any
work or material found to be of sub-standard shall be rejected and removed from site.
These
defective work or materials shall be replaced with corrective work/ materials to
the
satisfaction of SCI
1.6.11 In addition to conforming to
the
requirements of the British Standards and Codes of Practice listed in this specification, all bolting in workshop shall
be in accordance with the following requirements.
General
a) Connections to be bolted shall be secured in close contact by service bolts or
a sufficient number of permanent bolts before the connections are finally bolted.
b) Hardened tapered washers shall be provided at taper flanges to compensate for
the
lack of parallelism.
c) A minimum of one washer to be supplied per
bolt, positioned under
the
nut.
d) Taper washers shall
have
a minimum thickness of 3mm at the thin end.
Black and Precision Bolts
a) Bolts shall show not less than three clear threads through the nuts, and the threaded portion shall not bear upon the thickness of connected plies in
a tightened condition.
b) Drilled holes shall be accurately positioned to
template and burrs shall be
removed from edges of holes before parts are assembled.
Punching of holes shall be restricted to
the limitations as highlighted in this specification.
Drift
pins will
be allowed only for bringing together the several parts of the structure and shall not be used in such a way as to distort the work or enlarge the
holes.
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