Steel Structure Erection Method Of Statement

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 Index
S.NO CONTENT PAGE
1 OBJECTIVE 2
2 PURPOSE 2
3 SCOPE 2
4 WORK EXECUTION PROCESS 3
5 METHODOLOGY 5
6 INSTALLATION of STEEL STRUCTURES 7
7 Welded and bolted connections 8
8 Correction of errors 9
9 INSPECTIONS 10

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1.0 OBJECTIVE
To ensure the management, erection and installation work
on site are safe, correctly, and comply with the contract
specification.
2.0 PURPOSE
The purpose of this method of statement is to establish a
work sequence on how erection and installation of steel works
will be implemented. The statement includes work methodology
and sequence of activities all in accordance with the contract
specification for structural steelwork.

3.0 SCOPE
The following works, define the activities which will be
carried out for the implementation of the erection and
installation of steelwork for KENZ DOHA HYPER MARKET
warehouse according to the contract specification: -
• Transportation of Fabricated Portal Frame
• Unloading, Arrangement, Storage and Protect Materials
• Installation of Steel Columns
• Erection of Portal Frames, Rafters

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4.0 WORK EXECUTION PROCESS
4.1 Job Site Planning & Preparation
• Make sure there is space and firmed pathway for truck
delivery, crane truck erection operation. The suitable truck
& crane capacity must be clarified.
• The plan for unloading and storage of materials on the site
should be suitable and dry location. Materials shall be
stored in designated areas for each building and clearly
identified for their location as per planning.

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4.2 Receiving of material at site
• All delivery materials to the site shall be informed to the
site manager to have the plan for unloading. Upon arrival of
materials at the storage yard, the materials controller will
match delivery notes and shall verify the agreement.
• Unloading can be done manually by term with 25-tonne
cranes. A spreader should be used for long steel
components. Lifting nylon or cloth belts with suitable SWL
shall be used for unloading the materials to minimize the
damage. Be sure to hook belts to a component with the
right number of points and position so that the load of the
component itself is not damaged or broken, especially the
coating/discolor.

• All materials receipt at the site shall be visually inspected by

site supervisor/engineer for any damage after unloading.
Any damage shall be taken immediately, if possible, to
avoid any delay of erection.
4.3 Sequence of Erection
The structural portal frames and other parts that are related to
the structural building can be erected in various ways which will
depend on the following key factor:

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 • The types of structures such as small clear span, large clear
span, low rise building, high building, taper I structure and
open-web structure, etc.

• The availability of equipment

• The site conditions
• The experience level of the erectors
• The individual job conditions.
5.0 METHODOLOGY
The erection and installation of steel that according to the
contract specification clause.
5.1 Transportation of Fabricated Portal Frame

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 The fabricated I-beam columns, rafter and truss by the
measure in range 6m to 10m length weight approximately 1.5
metric tons are transported to the site by mean of the trailer.
The steel materials (fabricated portal frame) should be properly
arranged on the trailer by separately.
5.2 Unloading, Arrangement, Storage and Protect Material.
5.21 Unloading
The fabricated portal frame is unloaded by using a 25-tonne
crane. Before unloading materials out of trucks, the platform or
access road must be prepared properly for crane and trucks by
term safely loaded.
5.2.2 Arrangement
To avoid materials being moved so much on the job site that
might cause unexpected damages of paint or discolor and
shapes, they shall be unloaded and arranged close to the
designed erection point. The materials shall be stacked in
location according to the building/areas, and should be close to
the lifting position adjacent to the area to be erected.
Conditions of each job site, the materials arrangement plan may
different based on open clear area. The fabricated I-beam or
columns should be arranged close to their anchor bolt position.
Rafter should be arranged to ensure easy to assemble and move.
All condition arrangement should be checked park-mark as
parking list enclosed before unloading for the best unloading
position.
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5.2.3 Storage and Protect Material
To prevent and protect materials from damages during storage
that are exposed to environmental factors such as storm water,
dust, etc which can cause the rust, stain, discolor, and etc, the
proper storage should be provided to avoid the steel materials
damages, deformation and contamination. The tasks below
should be considered: -
Dry area and stored above ground level with timber packing and
ventilated.
- Steel component or materials shall be stored separately for
difference sizes and types.

6.0 INSTALLATION of STEEL STRUCTURES

Adequate scaffolding material, temporary supports or tension
rope cables shall be provided and used during installation of
steel structures.
By using temporary braces, partially completed structural
assemblies to be ensured safe and stable conditions.
The structure shall be plumbed, leveled and braced before final
bolted or welded connections are made.
Column base plates shall be set and shimmed to correct
positions, elevations, and locations as shown on the erection
drawings. After grouting, anchor bolts shall be tightened.

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Temporary attachments shall be removed after the installation
is completed.
7.0 Welded and bolted connections
Field welding shall only be used if so, required on the related
drawings.
Marking, cutting, alignment, fit-up and welding which may be
required during the installation of the structures shall be
performed in accordance with related specifications and
procedures.
High strength bolt assemblies shall be installed in accordance
with specification and standards.
Bolt lengths shall be sufficient to extend approximately 5 mm
through the nut. Fitted bolts shall clear the hole before the
thread starts. Bolts and nuts shall rest squarely against the
metal. Bolts shall be tightened in accordance with tensioning
requirements (snug tight or fully tensioned) given in the related
drawings and specifications.
When assembled, all joint surfaces, including those adjacent to
the bolt heads, nuts or washers shall be free from burrs, dirt and
other foreign materials that would prevent solid seating of parts.
All bolt assemblies shall be fully tightened. Bolts and nuts shall
not be welded under any circumstances. Direct tension indicator
washers, if used, shall be installed according to the
manufacturer’s instructions. When impact wrenches are used,
wrenches of adequate capacity and sufficient air supply shall be
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used to perform the required tightening of each bolt.
Mechanically galvanized bolts shall not be mixed with hot dip
galvanized nuts and bolts. Used bolts shall not be used again and
also, they shall not be used as fit-up bolts.
Ends of the torqued bolts shall be marked by permanent
marking paint to indicate that the bolts have been properly
tensioned and are ready for inspection.
8.0 Correction of errors
Bolts shall not be improperly used. Drift pin can be used to help
for bolting process but it shall not be driven with such force as to
damage the adjacent metal areas. Holes may be carefully
enlarged in accordance with the standards, when the connection
cannot be done due to minor misfit. Enlargement of holes shall
be by reaming or drilling only. Flame cutting, burning, gouging,
chipping or drift punching shall not be permitted. Holes in
connections that misfit by more than 1.5 mm can only be
corrected if allowed as per specifications and as directed by the
Client’s representative.
All damages done during the erection works to hot dip
galvanized coatings and to shop applied paintings, shall be
repaired in accordance with the approved Surface Preparation
and Painting Procedure.

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9.0 INSPECTIONS
Structural Steel Installation shall be inspected in accordance
with the approved Inspection and Test Plans (ITP).
Related tables of the ITP cover all inspection activities for
Structural Steel Installation, in chronological order. Main
segments of ITP will be; definition of the work, referenced
documents for the work, examination/inspection method,
evaluation of the result, involving parties (contractor, client,
etc.) and report forms for recording. Personnel executing the
inspections should have sufficient experience in the similar
work.

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