Step by Step Guide for Fabrication of Steel Box Girders for Bridge Construction

Architectural Specification: General

1    G E N E R AL

This section sets out the general requirements for carrying out any works for the project and shall be read in conjunction with all relevant work sections and other contract documents.

1 . 1   P r o j e c t P a r t i c u l a r s

1 . 1 . 1  T h e S i t e

The site is located at ｘｘｘｘｘｘ.

1 . 1 . 2  P r o j e c t T e a m

The following words shall have the meaning assigned to them:ｘｘｘｘ

1 . 1 . 3  S u p e r i n t e n d i n g O f f i c e r ( S O 

           SO shall refer to “Project Manager ” or “Resident Engineer”

1 . 2   G e n e r a l D e s c r i p t i o n o f t h e W o r k s

The civil and structural works shall cover the provision of a complete power plant which include the Turbine Hall, Feedwater Structure, Heat Recovery Steam Generator structures, Gas Insulated Switchgear substation, Cooling Water Intake Structure, Electrical Building and Transformer Area, Warehouse, ECP, Fuel Gas Treatment & Compressor Area, Fuel Oil Pump Station & Storage; and associated facilities/systems.

1 . 3   C o d e s, R e g u l a t i o n s , S t a n d a r d s a n d T e c h n i c a l R e f e r e n c e

1 . 3 . 1  R e g u l a t i o n s

The whole of the Works and materials are to be in accordance with the Building Control Regulations, other regulations as set out by the authorities having jurisdiction over the works, and the relevant bylaws unless otherwise stated.

Ensure that the requirements in the Specification are strictly adhered to when carrying out the Works, unless otherwise directed.

1 . 3 . 2  S t a n d a r d s a n d C o d e s o f P r a c t i c e s

Unless otherwise agreed by the SO, ensure all of the Works comply with the relevant requirements of the Standards and Codes listed below or referenced in the body of the Specification.  Alternative Standards and Codes may be proposed for approval by the SO, provided it can be demonstrated that the alternative Standards and Codes comply with the requirements of the standards specified. All Standards and Codes quoted are the current version, unless specific year references are noted.

In the event that the Standards or Codes are partially superseded or become obsolete, refer to the latest edition or the approved substitution for the relevant clauses.

In case of conflicting requirements between the codes, refer to the SO for resolution. Assume priority of precedence of different standards and codes in descending order as follows:

a.     Singapore Codes SS and SS CP

b.     SS ISO or ISO

c.      BS or BS EN

d.     Other standards such as ASTM (US), AS (Australia) and DIN (German), as    agreed            with the SO

1 . 3 . 3   T e c h n i c a l R e f e r e n c e

Where specified, be guided by the principles and methods as set out in the technical reference when carrying out the works. Alternative methods and principles may be proposed in lieu of the referenced document, subject to SO’s acceptance, if it can be demonstrated that the specified quality or performance of the works can be achieved.

1 . 4   W o r k P r e a m b l e s

1 . 4 . 1  Am b i g u i t y

Before commencing any works, obtain clarification or instructions in relation to any discrepancy or ambiguity, which is discovered within and between the Specification Worksections, and / or other contract documents issued by the various parties.

1 . 4 . 2  A p p r o v e d S u b - c o n t r a c t o r s

All sub-contractors for the works are subject to the SO’s acceptance. At the time of tender, submit the list of subcontractors intended to be engaged for the works. Submit with the

list, details such as the relevant track records of the firms, the qualification of the personnel and details of equipment to be engaged for the works.

1 . 4 . 3  L i c e n c e s , P e r m i t s a n d L i a i s o n w i t h t h e A u t h o r i t i e s

Be responsible to initiate the application for all necessary licences, permits, etc and to carry out all necessary liaison with the Government Departments and Statutory Boards,etc whenever necessary, for the satisfactory completion of the Works. Be responsible for ensuring that these licences and permits are obtained in good time.

1 . 4 . 4  S a f e t y R e g u l a t i o n s a n d T e m p o r a r y W o r k s

Strictly observe all necessary safety requirements to comply with the provisions of the Factories Act Revised Edition 1998 and The Factories (Building Operations and Works of Engineering Construction) Regulations Revised Edition 1999, and any other requirements from the authorities having jurisdiction over the works.

1 . 4 . 5  S a f e g u a r d i n g P r o p e r t i e s Ad j a c e n t t o S i t e

Propose and adopt site procedures and methods of working such as to limit to a minimum any disturbance and vibration to the buildings around the Site.

Identify and implement protective measures necessary to safeguard the adjacent properties prior to carrying out the works.

Indemnify the Employer in accordance with contract conditions against all claims for loss and/or damage to the adjoining properties by reason of the carrying out of the works or by reason of insufficiency of precautionary measures.

1 . 4 . 6  S i t e S u p e r v i s i o n

Provide personnel with adequate and relevant experience to SO’s acceptance, to

supervise the Work. Submit the CV of the superviser(s) to SO where directed.

1 . 4 . 7  C o o r d i n a t i o n o f W o r k s

Ensure that all units, components or assemblies whether from one or different sources, are available in time for incorporation into the Works.

1 . 4 . 8  M a i n t e n a n c e M a n u a l

Develop and submit for SO acceptance, a strategy in the form of a maintenance manual and logbook, to ensure that elements that are likely to deteriorate significantly can be replaced or rectified.

The maintenance manual and logbook are to describe the procedures for the satisfactory long-term care and regular maintenance of the materials and components identified in the work sections, to be carried out by the building owners. Include the following information, where appropriate:

a.      An outline description of the installation and detailed description of specific items with product names, types, serial numbers, etc.

b.      The name, address and telephone number of each supplier, fabricator, finisher, installer etc. involved in the Works.

c.      Recommendation on maintenance periods and planned preventive maintenance procedures.

d.       Copies of manufacturers’ warranties or guarantees, service manuals, brochures,      recommendations, etc.

e.       Copies of test and approval certificates.

f.      One original copy of documents showing “As Built” information and the like,      relevant to the installation. Submit the “As-Built” information in soft copies where directed by the SO. The Contractor shall compile one single set of the information from various sub-contractors for submission.

g.     Compilation of a list of parts to be replaced periodically and the names and contacts of the suppliers.

h.   Realignment and adjustment instructions where relevant.

i.      Procedures for dismantling and reassembling.

j.       Details of finishes, including color and required maintenance.

k.     Logbook pages set up for recording the times of performance of the above procedures, sufficient in number to receive the entries for a minimum of ten years or otherwise directed.  Show examples of typical entries by recording any

     maintenance procedures (such as cleaning) performed during the contract and or defects liability periods.

             

The forms of the maintenance manual and logbook are to be in A4 size, printed or typed on durable printing paper, each page consecutively numbered, neatly bound in durable vinyl or similar hardcover, and permanently labeled with the project name and date of issue. The Contractor shall compile one single set of the information from various subcontractors for submission.

1 . 4 . 9  T e s t i n g Au t h o r i t y

When tests and checks are called for in the specifications, engage a suitably equipped organization or laboratory accredited under the Singapore Laboratory Accreditation Scheme (SINGLAS) and to SO’s acceptance, to carry out the tests and checks required.

1 . 4 . 1 0  Q u a l i t y C o n t r o l P l a n

Prepare and submit a quality control plan for SO’s acceptance. Include a set of

Procedures/actions to:

·    Ensure the understanding of the project brief.

·    Ensure a number of checks and verification are put in place in the work process to enable the delivery of the brief.

·    Ensure the right person is employed to carry out the works.

·    Ensure the works are carried out based on proper operating instructions.

·    Ensure feedback and poor/defective works is picked up and attended to, and corrective / preventive action is in place.

·    Ensure prior approvals are obtained from SO for any deviations from the specifications before works commence.

·    Ensure documents of all tests and quality checks as specified are properly done and kept as records.

1 . 5   Ab b r e v i a t i o n s a n d D e f i n i t i o n s

1 . 5 . 1  A b b r e v i a t i o n s

The following abbreviations are applicable when referred to in the specifications:

AS             Australian Standard

ASTM          American Society for Testing and Materials

ASHRAE       American Society of Heating, Refrigerating and Air-Conditioning

                            Engineers

BCA           Building and Construction Authority

BMS           Building Management System

BMU           Building Maintenance Unit (Also known as Gondola system, Façade

  Maintenance Unit)

BS             British Standard

CFC           Chlorofluorocarbon

ETTV          Equivalent thermal transfer value HCFC          Hydro-chloro-fluoro-carbon

OH&S          Occupational Health and Safety OTTV           Overall thermal transfer value

PE              Professional Engineer PSD            Project Specific Data PVC            Polyvinylchloride

SAA            Standards Association of Australia

SS and SS CP Singapore Standard and Code of Practice

MSDS          Material Safety Data Sheets M&E           Mechanical and Electrical

RH                      Relative Humidity

SO            Superintending Officer

UV            Ultraviolet

1 . 5 . 2  D e f i n i t i o n s

Wherever the following terms are used they shall have the following meaning:

“The Works”       The whole of the Works envisaged by the Contract including the works of the Local Authority and Public Undertakings unless specifically stated otherwise.

"Directed"          Directed by the SO.

"Inspected"         Inspected by the SO.

"Submitted" or      Submitted to or submit to the SO for review and acceptance.

“Submit”

"Accepted" or       Accepted or acceptance by the SO.

"Acceptance"

"Approved" or       Approved by or approval from the SO.

“Approval”

“Acceptance” and “Approval” are used within the following limitation:

No approval or acceptance by the SO shall relieve the Contractor of any responsibility to achieve the specified quality and performance of the work under the Contract.

Any approval given in respect to samples of materials, workmanship or methods of construction submitted in accordance with the requirements of the Specification, are not to be interpreted as denoting any degree of satisfaction with the materials used in the Works or in the execution of the Works.