Technical Specifications - Grazioli Roof and Skylight.pdf

Embassy of The United States of America Rome, Italy

GRAZIOLI

Replacement of the Skylight at the building “A” and Pedestrian Roofs, both

Building “A” and “B”

Facility Engineering Office

Summary

1. GENERALITY'

1.1. SUBJECT OF THE SCOPE OF WORK 4

1.2. GENERAL REQUIREMENTS OF THE SOW 4

1.3. OFFER AND ALL-INCLUSIVE PRICES 5

2. DESCRIPTION OF THE WORKS

BRIEF DESCRIPTION OF CURRENT STATE – BUILDING A

BRIEF DESCRIPTION OF CURRENT STATE – BUILDING B

WORKS FORESEEN IN THE PROJECT;

NEW SKYLIGHT

NEW FLOORING

NEW STEEL STAIRCASE

INTERFERENCES IN GENERAL BUILDING “A”

SCAFFOLDING BUILDING “A”

SCAFFOLDING BUILDING “B”

WORK IN GENERAL

CONSTRUCTION SITE SAFETY

3. PROCEDURE FOR EXECUTING THE WORKS

3.1.1. Material acceptance rules

3.1.2. General rules

3.1.3. QUALITY OF MATERIALS

4. FLOORING

5. TECHNICAL REQUIREMENTS FOR THE EXECUTION OF RENTALS AND TRANSPORT ... 23

5.1.1. Provisional works

5.1.2. Rentals

5.1.3. Transportation

6. REQUIREMENTS ON QUALITY AND ORIGIN OF MATERIALS

6.1.1. Materials for structural works

7. STEEL FOR METALLIC STRUCTURES

7.1. TYPOLOGY 24

7.2. IDENTIFICATION 25

7.3. MARKING 25

7.4. LOCATION OF MARKINGS 25

7.5. STAMPING 25

7.6. LENGTH 25

7.7. COMING TO COMPRESSION 26

7.8. STORAGE AND HANDLING ON SITE 26

7.9. PRE-ASSEMBLY ON SITE 26

7.10. ON-SITE ASSEMBLY 26

7.11. CUT 27

7.12. BEARING CONTACTS FOR JOINTS SUBJECTED TO COMPRESSION 27

7.13. STIFFENERS 27

7.14. STRAIGHTENING 27

7.15. WARM UP 27

7.16. TEMPORARY CONNECTIONS 27

7.17. ASSEMBLY 28

7.18. ALIGNMENT OF STRUCTURES 28

7.19. PILLAR LEVELLING 28

7.20. THEORETICAL DESIGN COUNTER-ARROWS 28

7.21. COUNTER-ARROWS FOR THE SETTLEMENT OF THE JOINTS 28

7.22. BASEPLATE BOLTS IN SLEEVES 28

7.23. WELDED JOINTS 29

7.24. WELDING PROCEDURE 29

7.25. TEMPORARY WELDS AND TEMPORARY CONNECTIONS 29

7.26. BUTT WELDS 29

7.27. WELDS OF PINS OR CONNECTORS 29

7.28. WELDING TEST 29

7.29. SLAG REMOVAL 30

7.30. HOLES FOR BOLTED CONNECTIONS 30

7.31. PREPARATION OF THE ELEMENTS TO BE BOLTED 30

7.32. CONDITION OF THE BOLTS 30

7.33. WASHERS 30

7.34. VARIABLE THICKNESS WASHERS 30

7.35. LOCKING BOLTS 30

7.36. LENGTH LIMITS 30

7.37. BOLT PULL 31

7.38. CONNECTIONS THAT ALLOW MOVEMENT - SLOTS 31

7.39. CHEMICAL CONNECTORS 31

7.40. ANCHOR BOLTS 31

7.41. CORROSION PROTECTION - GALVANIZING 31

8. CHECKS

8.1. STEEL FOR METALLIC CARPENTRY 32

9. TECHNICAL REQUIREMENTS FOR THE EXECUTION OF THE WORKS

9.1.1. Laying of the materials

10. SITE ORGANIZATION AND SAFETY

10.1. DAMAGE 35

11. PHOTOGRAPHICAL DOCUMENTATION

12. SOLICITATION CHARACTERISTICS

12.1. CONTRACT PHASE 42

12.2. IMPLEMENTATION PHASE 42

12.3. CONCLUSION PHASE 43

12.4. PERFORMANCE TIME AND PENALTIES FOR DELAYS 43

12.5. SUBCONTRACTING AND PIECEWORK 43

12.6. WORK PROGRESS 44

12.7. PARKING 44

13. PRESENTATION OF OFFER

14. CATALOGUE CUTS

15. REGISTRY OF SUBMISSION

16. DRAWINGS

1. GENERALITY'

1.1. SUBJECT OF THE SCOPE OF WORK

The object of this contract concerns the works relating to:

- demolition of the existing Skylight which is now damaged and unsafe at the Building “A”;

- demolition of the pedestrian roof floor, including foundations and waterproofing, both buildings

“A” and “B”;

- installation of a new Skylight for the patio, in steel and aluminum and glass with thermal break and of the “Visarm” type, at the Building “A”;

- new walkable roofing package;

- new steel access ladder for ordinary plant maintenance, both at the buildings “A” and “B”;

- Painting of the internal facades of the Patio of the building called "A";;

The works are located inside the Compound called "RESIDENCE GRAZIOLI ".

The works object of the contract, described in this Scope of Work (hereinafter SOW), must be complete in all their parts, even for what is necessary not expressly mentioned, but in any case for the complete and workmanlike work, suitable for the meeting the anticipated need.

For a complete identification of the work, please refer to the technical conditions indicated in this SOW and to the drawings.

A complete maintenance booklet for each individual component must be delivered.

1.2. GENERAL REQUIREMENTS OF THE SOW

All the works described in the descriptive and graphic documents must be carried out in the most scrupulous observance of the current Laws, rules and regulations, in any case, in a workmanlike manner.

It stand to reason that all the costs for the issue by the competent Authorities of any access permits or temporary occupation of the external area are borne by the Contractor (hereinafter the Company or Contractor).

All non-reusable removal materials, contemplated in this deed, will be transported to public landfills or eventually to places indicated by the Client at the care and expense of the

Contractor Company for which suitable transport documentation must be provided and delivery to authorized landfills without the expenses such as the work will not be compensated.

It also remains established that all costs relating to site inspections and surveys that the company deems most appropriate during the construction site or temporary site inspection are included and compensated for in the lump-sum prices referred to in this contract.

Prior to the start of work, the contractor must provide the Client with:

within days 30 (thirty) calendar and consecutive days, including holidays and semi-holidays from the date of the Notice to Proceed:

a construction site and assembly project , complete in every detail and completion of the project responsible for the basis of the tender signed by company technical staff responsible for the production of the modules themselves;

a detailed work schedule;

Any executive Calculations, personally signed by a qualified person, adapted with suitable geological investigations, of the structures to be built including the construction details of the solutions adopted for their construction.

Upon delivery of the works, the contractor will arrange at its own expense to organize and set up the site within the area dedicated to the works, being responsible for the custody of means and materials, as will be better specified in the following documents that the company is required to draw up and send to the COR, before handing over the construction site, to the

CSE and to the Project Supervisor.

All charges relating to demolitions, removals of the relative areas of intervention must be considered included and compensated, including handling on site, any lifting and lowering, loading and transport to landfill of resulting materials and download charges.

All the charges relating to the preparation of all the temporary works, such as delimitations and anything else necessary for the safe execution of the works relating to the intervention in question, are also to be considered included and compensated in the lump sum prices.

Any material used (“gravel, scree…”) to make the site area suitable for vehicles is included.

With regard to removals and excavations, these must be carried out in an orderly manner and with the necessary precautions, in order to prevent any injury to workers and to avoid inconvenience or disturbance to the performance of activities within the area.

The production of dust must be limited, therefore the resulting materials must be, if necessary, covered and contained in "removable" containers until they are disposed of.

For the indications referring to the constructional and dimensional characteristics of the artefacts, reference must be made to the description of the works and to the current state of the places, which the contractor must have compulsorily examined in the places concerned.

Finally, it should be noted that the unit prices applied to the various magisteriums must therefore include general expenses, any costs for design, assembly and assembly, company profits, charges for labour, transport, freight and materials, etc.

1.3. OFFER AND ALL-INCLUSIVE PRICES

The works referred to in this deed are "lump sum contract". By accepting this contract, the contractor declares, to all intents and purposes, that in formulating the offer it has taken into account all the particular and general situations inherent in the contract covered by this deed and, in particular, that it has evaluated all the obligations and charges indicated or referred to even implicitly, also evaluating the new prices if present, with the relative analyses.

The contractor agrees to carry out the works according to the conditions and methods established or referred to in this Deed, even implicitly.

In accepting this SOW, the contractor declares to have taken full knowledge of the area subject to intervention and its nature, which lead to greater costs, to have normally examined the general, particular and contractual circumstances relating to the contract and the execution times and that you have taken all of this into account in your offer.

The contractor acknowledges that the consideration for the contract, agreed in the manner and under the conditions all indicated or referred to implicitly in this deed, is inclusive of all the works and furniture required for the perfect execution of the contract itself in its entirety and functionality, including charges of all kinds.

With the lump sum prices of the estimate, it is intended to compensate the contractor for any general and particular burden for undertaking the works to be fully functional and complete even in the non-mainstream parts and prescribed in these Specifications. Consequently, the estimated prices cannot be subject to changes due to incomplete or erroneous forecasts made by the Company in determining the offer during the tender. In the price the value of the offer, the Company must also include for all prices take into account the charges referred to in the

Administrative Conditions and in particular:

• on-site supplies of all materials;

• sources of energy and water supply;

• labor performance;

• rental of all necessary equipment of any kind;

• charges deriving from the general and particular conditions of these Regulations

(geotechnical tests and professional services, relating to checks, calculations, tests, documentation and certifications, static tests, technical tests - provisional, final test, etc.);

• contractual and tax expenses.

At the beginning of the works, the contractor will take care and expenses to organize and set up its construction site on the areas granted, according to its instructions given by the Facility

Management, as per the timetable presented by the same company, being responsible for the custody of vehicles and materials , as will be better specified on the POS (operational safety) that the company will be required to prepare in advance of the construction site installation.

All charges relating to the construction site of the intervention areas (delimitations, shelters, walkways, systems, etc.) which will be implemented from time to time by the Contractor

Company must be considered included and compensated, even if not expressly provided for in these Specifications, but however necessary for the correct execution of the contract. All charges relating to the preparation of all temporary works, such as scaffolding, shoring and anything else necessary for the safe execution of the works relating to the intervention in question are included and compensated in the lump-sum prices.

2. DESCRIPTION OF THE WORKS

The design of the works has the purpose of replacing the old and damaged Skylight affect building

“A”, and both the flooring on the pedestrian Roof of the building “A” and “B”.

Picture 1 – Territorial classification, in the red circle the building called Grazioli “A e B”.

Picture 2 – Inside the yellow line the Pedestrian Flat Roof in question – Building “A”

Picture 3 – Inside the yellow line the Pedestrian Flat Roof in question – Building “B”

Brief description of current state – Building A

Currently, the areas in question are in a very poor condition with evident signs of deterioration, both as regards the Clinker flooring, broken in many points, but above all the glass/cement roofing of the

Patio, built several decades ago, it showed signs of failure with portions of it falling from a height.

Furthermore, it should be noted that:

• several old satellite dish/aerials, no longer in use for many years, must be removed;

• the pedestrian roof has not a protective railing along the perimeter, with consequent danger for those responsible for maintenance of the systems that insist on it;

Finally, the project aims to improve access to the roof terrace, it does not exist today, by installing a steel staircase with a protective railing and an anti-intrusion gate. In fact, in order to access the aforementioned areas, our maintainers must place a temporary ladder.

Picture 4 – Existing Plan Building “A”

Picture 5 – Existing Sections Building “A”

Some Picture:

Picture 6 and 7– Existing state Building “A”

Brief description of current state – Building B

Currently, the areas in subject are in a very poor condition with evident signs of deterioration, as regards the Clinker flooring, broken in many points.

Furthermore, it should be noted that:

• the last pedestrian roof, on top of the Roof, please see picture 8, top called “b”, has not a protective railing along the perimeter, with consequent danger for those responsible for maintenance of the systems that insist on it;

Finally, the project aims to improve access to the roof terrace, it does not exist today, by installing a steel staircase with a protective railing and an anti-intrusion gate. In fact, in order to access the aforementioned areas, our maintainers must place a temporary ladder.

Picture 8 – Existing Plan Building “B” b

Works foreseen in the project;

More specifically, the works will concern:

Fencing of construction site areas and preparation of storage area and temporary routes;

Installation of the scaffolding inside the Patio area, at the building “A”;

Demolition of the existing and damaged Skylight at the building “A”;

Demolition of the existing Flooring including the floor foundation, both “A” and “B”;

Installation of the steel staircase with a gate and railings from attic to super attic, both “A” and

“B”;

Installation of new Skylight at the building “A”;

Installation of the Flooring, with new floor foundation, new waterproofing, new screed and new

Tiles, both building “A” and “B”;

Installation of the Permanent Safety steel Railings, both “A” and “B”;

Painting of the internal surface of the Patio, at the building “A”;

Picture 9 – Axonometry New Project of the Building “A”

Picture 10 – New Plan of the pedestrian Roof , building “A”

Picture 11 – New Sections of the patio and Pedestrian Roof of the building “A”

Picture 12 – New Plan of the pedestrian Roof , building “B”

NEW SKYLIGHT

The need to replace the Skylight stems from the evident state of abandonment and deterioration of the current glass roof, built more than forty years ago with glass/cement bricks.

The new structure must be made of steel/aluminum and "Visarm" / VSG laminated safety glass.

Picture 13 – Structure for skylight

The roofing system must be hooked to the perimeter walls by means of a reinforced concrete curb.

and external gutter that covers the entire curb up to a height of at least 40cm. For more details, see figure 9, below.

Pictures 14 – Structure for Skylight – detail

As far as the glass plates are concerned, they must have insulating thermal break of the Visarm /

VSG type, i.e. laminated safety, as indicated in figure 15.

Pictures 15 – Structure for Skylight – detail Glass

NEW FLOORING

The existing flooring has cracks and signs of deterioration in several points, moreover, as can be seen in figure 16, it was built without thermal insulation.

Pictures 16 – Existing Flooring Stratigraphy

Pictures 17 – Existing Flooring Stratigraphy – Inspection detail

The new flooring aims, in addition to replacing the old and obsolete, to create a thermal barrier aimed at energy containment of the building.

Below is the proposed stratigraphy.

Pictures 18 – New Flooring Stratigraphy to use

NEW STEEL STAIRCASE

Among the planned works, there is the construction of a steel staircase with railing and gate with lock. The system must be developed by the contractor, providing the necessary drawings and calculations according to current legislation. The "staircase" system, at the base, will be connected to the existing steel beams or alternatively directly connected to the structural floor of the building, by means of mechanical anchor bolts. As for the landing at the top, it can be connected to the beams of the reinforced concrete building, by means of mechanical anchoring with screws having a depth not less than 15 cm. The railing must have geometry and height compliant with American safety regulations. The steel to be used for the metal carpentry must be of the type compliant with structural use in Italy and in any case not lower than S235. See pictures below.

Pictures 19 – New Steel staircase –axonometric – building “A”

Pictures 20 – Plan of the new steel staircase – Building “A”

Pictures 21 – Elevation of the new steel staircase – Building “A”

INTERFERENCES IN GENERAL BUILDING “A”

On the top of the Terrace, there are several channel, and there could be various interferences, of an electric, water, sewage type, each of which must be respected, and/or replaced or moved.

The interference item includes all manufacturing, materials and/or services necessary for the perfect functionality of the interference found. Therefore, excavations and backfilling, the supply and installation of concrete, sand, wells, cast iron manhole covers, pipes of the same material and/or section as the existing one are included.

SCAFFOLDING BUILDING “A”

The works require the installation of scaffolding inside the patio, on all four sides until reaching the useful height for the installation of the Skylight, but also for painting the internal facades. The work also includes the assembly and rental of a Flag elevator and the installation of two intermediate safety floors that will cover the entire plan surface of the patio. Before the start of the works, the contractor have to present a regular scaffolding project and all the necessary procedures for working in safety according to Legislative Decree 81/08 and subsequent amendments.

SCAFFOLDING BUILDING “B”

The works require the installation of scaffolding out of the building “B”. The work also includes the assembly and rental of an elevator. Before the start of the works, the contractor have to present a regular scaffolding project and all the necessary procedures for working in safety according to

Legislative Decree 81/08 and subsequent amendments.

WORK IN GENERAL

All works, civil, electrical, hydraulic, temporary safety of the sites, must be supported by plans and executive drawings for the construction site, which must be approved by the COR.

At the end of the work, the contractor must provide files in original format (e.g. dwg, word, excel, etc.)

of the As-Builts.

CONSTRUCTION SITE SAFETY

The safety of the construction site, including all charges foreseen by the current legislation, will be an important aspect for the planned works. The item includes the following:

- Securing the existing masonry wall using wooden beams and struts for the entire section affected by the excavations, including executive drawings and calculations signed by a qualified technician;

- Fencing of the construction site area, temporary walkways, construction site bathroom.

- All types of scaffolding possibly necessary for carrying out the planned works, including elevators needed.

3. PROCEDURE FOR EXECUTING THE WORKS

3.1.1. Material acceptance rules

The materials required for the construction of the works, whatever their origin, will be of the best quality, and will be considered accepted only when, at the unquestionable judgment of the

COR, they correspond to those designated below in terms of nature, quality, durability, suitability and application. Except for special materials, all the works must come from quarries, factories, refineries, etc., deposits. chosen exclusively by the Company, which cannot make any exceptions, if during the course of the cultivation of the quarries, or operation of the factories, establishments, refineries, etc. the materials no longer met the prescribed requirements, or were missing and it was therefore obliged to resort to other quarries, in different locations, or of different origins, it being understood that, even in such cases, the stability unit prices in the list will remain unchanged and the sums for lump sum fees, as well as all that is observed to the quality and individual materials.

3.1.2. General rules

The articles below must establish the execution rules for the various works contemplated in the

Contract, as well as the technical specifications of the materials used.

As a general rule in the execution, the Company will have to comply with the best rules of the art as well as with the following works. For the categories of works that are not found in this

SOW, and for which no special rules have been prescribed, in particular for any work to be carried out economically, the Company must follow the best procedures dictated by the technique and comply with the orders that for this purpose, the Works Management will issue.

Works which, for any reason, immediately or subsequently prove to be badly performed, must be redone at the Company's expense, without the need for a formal request from the Works

Management; the possible presence on site of an overseer of the Principal cannot be invoked by the Contractor in discharge of its liability.

For the works on the networks and for the construction of artifacts and works of art, the

Company, having received the delivery, referring to the project cornerstones, will first carry out the tracing of the work by affixing the stakes and modifiers for the axis, for the sections and for the works of art; at his care and expense the pickets will be maintained until completion.

3.1.3. QUALITY OF MATERIALS

All the works envisaged by this SOW can be performed in perfect working order and with materials that meet the technical specifications indicated and/or referred to in this SOW and in the annexed documents.

The quality of the material used in the execution of these works must meet, when not otherwise specified by company rules or regulations, the requisites required by the laws in force and by the official standards of good construction techniques.

The Client, during construction and at any time, may take material samples from the manufactured articles used to verify their perfect correspondence with the approved types.

In this case, the company will have to make an operating team available to the client to carry out the activities necessary for the execution of these checks, carried out with the help of a specific specialized company. These charges will be charged to the Contractor, including any demolition and reconstruction of the works found to be non-compliant.

The Contractor must promptly report any defect or anomaly found on the materials supplied directly by the Principal. .

4. FLOORING

The new flooring shall have the following stratigraphy, from bottom to top:

1. "Ready" screed to recreate the slopes necessary for the drainage of rainwater:

2. Two layers of bituminous sheath having a minimum thickness of 4mm (4+4=8mm)

3. Layer of non-woven fabric;

4. Insulating layer having a minimum thickness of 5cm with a compressive strength of 500Mpa

(i. e. Styrodur type or similar);

5. Desolidarition layer;

6. Lightweight screed, minimum thickness of 3.5 cm + light electro-welded mesh 5/5 F2;

7. Porcelain stoneware flooring, type R11;

As regards the type of material and the methods of installation, refer to the technical data sheets included in the "Catalogue Cuts" paragraph.

5. MATERIAL EQUIVALENT

The contractor shall verify and ensure that all materials supplied are new and without defects and that their use and/or installation is carried out using the best techniques and fully respecting the instructions supplied by the manufactures.

Special parts shall be manufactured solely by workshops that are higly qualified in that specific sector.

The makes indicated in this SOW are intended as a point of reference and therefore, the words or approved equivalent are implicit.

therefore, the makes and products listed are deemed equivalent to each other. Different selections implemented by the Contractor shall be approved in advance by the COR, after submission of samples and technical cards.

5. TECHNICAL REQUIREMENTS FOR THE EXECUTION OF RENTALS AND

TRANSPORT

5.1.1. Provisional works

The main regulations concerning scaffolding and scaffolding, fixed metal scaffolding, mobile scaffolding, etc., are contained in Legislative Decree 81/08 and subsequent Legislative Decree No.

106 of 08/03/2009.

5.1.2. Rentals

The machines and tools given for hire must be in perfect working order and be equipped with all the accessories necessary for their operation. The maintenance of tools and machines is the exclusive responsibility of the Company so that they are in constant efficiency.

The "body" price includes: transport from the place of origin to the construction site and vice versa, assembly and disassembly, labour, fuel, lubricants, consumables, electricity, scrap and everything for the necessary functioning of the means. They also include general expenses and the entrepreneur's profit in the freight rates.

5.1.3. Transportation

If the size of the material to be transported is less than the payload of the vehicle requested for hire, no price reductions are envisaged.

The supply of consumables and the driver's labor are included in the transport prices.

6. REQUIREMENTS ON QUALITY AND ORIGIN OF MATERIALS

6.1.1. Materials for structural works

The use of materials for the construction of the foundation and elevation artifacts in normal reinforced concrete and steel is subject to the quality and mechanical characteristics in the calculation report.

Their choice will comply with the requirements indicated in the TECHNICAL STANDARDS FOR

CONSTRUCTION referred to in DM 17/01/2018 - GU 42 of 20 February 2018 , suppl. ordinary.

All structural materials referred to below must be:

UNIQUELY IDENTIFIED by the manufacturer, according to the applicable procedures referred to in NTC 2018;

QUALIFIED under the responsibility of the manufacturer, according to the procedures set out in NTC 2018;

ACCEPTED by the Project Manager through the acquisition and verification of the qualification documentation, as well as through any experimental acceptance tests.

7. STEEL FOR METALLIC STRUCTURES

7.1. Typology

For the construction of metal structures, the use of steels compliant with the harmonized standards of the series UNI EN 10025 (for rolled steel), UNI EN 10210 (for seamless pipes), and UNI EN 10219-1

(for pipes welded).

These will bear the CE marking required by Directive 89/106/EEC – Construction products (CPD) implemented in Italy by Presidential Decree 21/04/1993 n. 246 as amended by Presidential Decree

10/12/1997 n. 499 and will be certified with a system of attestation of conformity as defined in point

11.3 of the NTC 2018. For the verification of the mechanical characteristics, the sampling of the samples, the position in the piece from which they must be taken, for the preparation of the test tubes and the test methods must comply with the requirements of the UNI EN ISO 377/1999, UNI

552/1986, EN 10002-1/2004 and UNI EN 10045-1/1992 standards.

For the construction of all the main metal parts, the use of S275 steel is prescribed as indicated in the executive tables and as defined in point 11.3.4.1 - Generalities of the NTC 2018.

This characterized by:

All steels must have a chemical composition that complies with what is reported in the applicable harmonized European standards, as defined in point 11.3.2.6 of the NTC 2018. As provided for in point 11.3.4.5 - Welding process of the NTC 2018, the welding of the steels must take place according to the procedures codified by the UNI EN ISO 4063/2001 standard. Welders in manual and semi-automatic procedures must be qualified according to the UNI EN 287-1/2004 standard. Welders making fillet tee joints will need to be specifically qualified and may not be qualified by making butt joints only.

In carrying out the welding, the Uni EN 1011/2005 standards parts 1-2 must be respected.

The bolts used will comply with the UNI EN ISO 4016/2002 and UNI 5592/1968 standards. The use of bolts consisting of class 8.8 screws and class 8 nuts according to the UNI EN ISO 898-1/2001 standard with the following resistance properties is prescribed:

7.2. Identification

The product supplied by the Contractor must have a branding, which clearly shows the reference to the manufacturing company, the production plant, the type of steel and its quality grade. The trademark must be filed with the Ministry of LL.PP., Central Technical Service. Failure to mark or its illegibility, even partial, will result in the refusal of the supply. The Contractor shall provide the Works

Supervisor (DL) with the certificates relating to the qualification tests and the periodic quality verification tests; these certificates must clearly show:

a. the name of the manufacturing company, the plant and the place of production

b. the test certificate according to UNI EN 10204:2005

c. the identification mark of the product filed with the Central Technical Service

d. the details of the last deposit certificate obtained for the theoretical quality verification tests

e. the date of sampling, the place where the tests were carried out and the date of issue of the certificate (not earlier than three months from the date of the site inspection)

f. the nominal and actual dimensions of the product

g. the results of tests carried out in the factory or in an official laboratory

h. the chemical analysis, which for weldable products, must satisfy the composition limits recommended by UNI 5132

i. the statistical processing required by the attachments of the Ministerial Decree of 14.01.2018.

The DL may ask to take samples of materials to be subjected to further tests.

7.3. Marking

Contractor shall mark and document and ensure that all materials are used as specified.

7.4. Location of markings

The markings must be in such a position as not to be hidden by other materials after installation.

7.5. Stamping

If the steel is to be sandblasted, acid treated, sprayed or galvanized it must be marked with low pressure marking. Marks must be of adequate depth to avoid deletion. Sandblasting, where necessary, must be done according to the Swedish standards SS 05-59-00.

7.6. Length

Members having both ends prepared for compressive contact, such as struts or columns, should not deviate from the intended length by more than 1mm.

The elements that do not have the ends prepared for compression contacts, and which must be connected to other metal parts of the structure, must not deviate from the pre-established length by more than 2mm if the total length is equal to or less than 10m, and 4mm for elements longer 10m long.

7.7. Coming to Compression

The gap between joints whose performance, when assembled during manufacture, depends on compressive contact, must not exceed 0.75 mm and must be less than 0.25 mm over 50% of the contact section length.

7.8. Storage and handling on site

The steel structures will be placed in a separate storage area from that of the other site materials.

This area will be kept clean. The contractor will take care to check before assembly that there are no earthy residues or other impurities/slag on the surface of the profiles.

If there is dirt, it must be removed by brushing. All steel structural elements brought to the construction site and 'stored' before installation must be adequately protected and supported so as to be lifted off the ground. Part markings must be visible when parts are stored. The contractor must use the utmost care in packing the material and in particular in handling and transporting the metal structures in such a way as to avoid any damage to the structures themselves and to the protective layers.

7.9. Pre-assembly on site

All pre-assembly of the structures will be carried out on benches raised off the ground suitably prepared by the contractor. The pre-assembly areas, unless otherwise agreed with the DL, must be carried out outside the perimeter of the finished building. Upon delivery of the works, the DL will indicate to the contractor the areas envisaged for pre-assembly. The pre-assemblies must be carried out according to the assembly program, all the pre-assembled material must be stored in appropriately prepared buffer areas. All material stored in the Buffer areas shall be sequenced according to the installation schedule.

If it is not possible to provide site areas sufficient to allow the pre-assembly of the structures on site, this operation must be performed by the contractor at its workshops, or in another place agreed and accessible to the Works Manager.

The material must arrive on site already sequenced according to the assembly schedule.

7.10. On-site assembly

Before drawing up the tender offer, the Steel Works Contractor is required to carry out a site visit in order to ascertain the operating conditions associated with assembly. On this occasion, a "Report of the visit" must be drawn up. During the preliminary site visit, the following areas will be identified:

storage area pre-assembly area assembly area (lift)

All in relation to effective general operations. The contractor is required to check the tracing of the anchors to the reinforced concrete structures before starting the assembly phase. Under no circumstances will claims relating to tracking errors be accepted by the executor of the civil works.

7.11. Cut

Steel must be cut with an automatic or semi-automatic system. Manual or flame cutting will be used only when the use of automatic or semi-automatic machinery is not possible, and only with the approval of the Works Manager. The use of hot device cutting equipment is not permitted without prior approval of the Worker. If flame cuts are made, the edges of all the cut plates must be smoothed to remove scale, marks, deposits, irregularities and excessive hardening. Burrs, sharp edges and irregular edges must also be removed by grinding.

7.12. Bearing contacts for joints subjected to compression

Joints subjected to compression will have contact surfaces prepared to obtain an adequate joint plane. It will be possible to use filing, cutting or other equivalent systems approved by the DL. The surfaces intended for contact joints must be at right angles to the nominal axis of the element itself.

Different angles will be accepted only if indicated and annotated in the carpentry drawings.

It is not necessary to carry out any additional preparation on surfaces which are intended to be incorporated in mortar beds such as foundation plates, or those of attachment of metal structures to concrete structures.

7.13. stiffeners

The stiffener gussets will be cut and sanded to ensure precise contact along the edges of the flanges.

7.14. Straightening

No straightening of the material must be carried out which could cause alterations of its physical or chemical characteristics and consequently a non-compliance with the requirements specified for the material at the time of supply.

Before starting work, the Contractor must provide the Works Supervision for approval, and include in its Method Statement, the procedures it intends to adopt for any straightening interventions on structural elements.

7.15. Warm up

No heating of the material must be carried out which could cause an alteration of its characteristics and consequently a non-compliance with the requirements specified for the material at the time of supply.

7.16. Temporary connections

After their use, the Contractor must remove any temporary connections that may have been necessary to implement his method of manufacture or implementation. The removal of any temporary element must take place in compliance with the relevant regulations and with a procedure agreed and approved by the DL.

7.17. Assembly

Whatever the assembly sequences, the contractor must take into account the static behavior of the structure in the partial configurations and the stresses produced during the lifting phase by drawing up a specific calculation report.

It will also be necessary to define the type of substrate suitable both for the passage of vehicles and for correct pre-assembly of the structures.

7.18. Alignment of structures

All structural parts will be aligned as soon as possible after their assembly. Permanent connections between the various members will not be made until the structure has been sufficiently aligned, leveled, plumbed and temporarily connected. The Contractor shall ensure that the various components do not go out of square when setting up or aligning the rest of the structure.

Due consideration should be given to the effects of temperature on the structure and measuring instruments when taking measurements for layout, siting and construction, and for all subsequent dimensional checks.

7.19. Pillar levelling

The leveling and plumbing of the pillars will be done using flat wedge-shaped steel plates of adequate size, strength and stiffness.

Where leveling plates are left in place for later incorporation into mortar, they should be positioned so that they are completely enclosed and covered by the casting.

7.20. Theoretical design counter-arrows

The geometry shown in the drawings of the Executive Project corresponds to the undeformed structure and net of preforming; The Construction design will have to consider the appropriate strategies for a possible pre-camber.

7.21. Counter-arrows for the settlement of the joints

A further and adequate preforming may be envisaged, to cope with irreversible settlements, to take into consideration the cumulative settlement of the joints present in the roofing structure.

7.22. Baseplate bolts in sleeves

The anchor bolts of the base plates must be placed at a suitable distance from the surfaces which laterally limit the reinforced concrete structure to which they are anchored. The anchorage length must comply with the provisions of the DM 14.01.2018.

The plan position of the base bolts positioned in sleeves which will eventually be concreted in, must not deviate from the position specified on the drawings by more than 5 mm.

7.23. Welded joints

Welds and steels for welded structures must comply with the recommendations contained in UNI

5132. Welds must be done under the direction of welder technicians who have appropriate qualifications, and who have procedure certification according to UNI 4634.

7.24. Welding procedure

The welding procedures must comply with the recommendations of UNI 5132. For the execution of the welded joints on site and/or at the foot of the work, an approach of the parts must be guaranteed within the tolerances allowed for each type of welding. The necessary supports of the filler material must therefore be provided in accordance with the preparation of the flaps. All necessary precautions must be taken for perfect alignment of the parts to be welded. As a general rule, welds should not be smoothed unless explicitly indicated on the drawings.

Welding procedures and fabrication sequences should be such as to minimize distortion.

7.25. Temporary welds and temporary connections

Temporary welds and those relating to temporary joints, necessary for manufacturing and/or installation, must comply with the aforementioned regulations, and must be removed so as not to damage the permanent works. The removal method must be submitted to the approval of the DL.

7.26. Butt welds

Where possible backplates will be used to ensure full thickness/fill of the groove at the ends. These plates must meet the following requirements:

a) The mechanical and physical characteristics for the plates must be identical to those of the material to be welded.

b) The plates must be prepared in the same way as the parts to be joined.

c) After completion of the weld, the plates must be removed by cutting.

The surfaces to which they were attached should be chamfered, ground and inspected for cracks.

7.27. Welds of pins or connectors

Where foreseen, the rotation or sliding pins must be installed according to the manufacturer's prescriptions both for the materials and for the accessory procedures and devices.

7.28. Welding test

Before starting work, the contractor must conduct a series of welding tests on pins/connectors to verify the adequacy of the welding system and the proposed equipment.

The tests must be carried out using the same material and the procedures foreseen for the works.

At least ten percent of the connectors must be tested in trials. In the hypothesis of in situ welding of the connectors, at the beginning of each shift, at least two welding tests must be carried out for each welder.

7.29. Slag removal

The slag will be removed with light hammering, metal brushes or other methods that do not deform the weld surface.

7.30. Holes for bolted connections

All holes will be punched and reamed unless otherwise agreed with the DL. Unless otherwise indicated on the drawings, the holes for normal bolts must have a diameter equal to that of the bolt, increased by 1.0 mm up to diameter 20 mm, and by 1.5 mm for diameters greater than 20 mm, except for foundation plates where a slightly larger tolerance is acceptable. In the event that the holes move out of alignment between two flanges, it is not permissible to enlarge the holes or distort the metal to achieve alignment. For bolts and vent holes in hollow sections the holes shall be sealed to prevent moisture ingress.

If the methodologies to be used are not specified in the project documents, they will be defined by the

Contractor who will illustrate them in his method declaration.

7.31. Preparation of the elements to be bolted

For all bolted assemblies, the degree of resistance of the bolt - nut - washer combination must comply with the provisions or recommendations in the relevant Standards.

7.32. Condition of the bolts

The bolt assembly immediately prior to installation must be in such a condition that the nut rotates freely on the bolt.

7.33. Washers

Each bolted connection must contain at least one washer placed under the part being rotated.

7.34. Variable thickness washers

These washers shall be used under bolt heads or nuts which rest on surfaces inclined 3 or more degrees from the plane at right angles to the bolt axis.

7.35. Locking bolts

Nuts used in joints subject to vibration or reverse stress will be suitably locked. If the methodologies to be used are not specified in the project documents, they will be defined by the contractor which will illustrate them in its method declaration.

7.36. Length limits

The length of the bolt must be such that at least one thread is visible above the nut after pulling, and at least one thread other than the final thread is free between the nut and the non-threaded part of the bolt.

7.37. Bolt pull

The tightening torques will comply with the recommendations contained in Eurocode 3. The tightening must never be pushed beyond the nominal limit in order not to compromise the capacity of the joint. The tightening torque tolerance is 10%.

7.38. Connections that allow movement - slots

If slotted holes are indicated on the drawings to allow movement, the joint must be assembled in such a way as to allow the desired or prescribed movement.

Slotted connections will be made using the following method:

a) The slotted hole must be of a larger diameter than the non-slotted one.

b) A bolt of the large head type must be used, with a spring washer under the head, which rests on the contact surface of the non-slotted part.

c) A flat washer must be placed under the nut and this must be tightened on the non-slotted side.

The contractor is strictly prohibited from making slots in the connections where they are not specifically prescribed by the project. In the event that this prohibition is not respected, the DL will order the immediate replacement of the pieces in question.

7.39. Chemical connectors

Where specified in the project documents, the use of connectors that use chemical resins is permitted, provided that the specifications and methods required by the manufacturer are scrupulously followed.

The choice of the appropriate type of chemical connector, if not indicated in the project documents, will be made by the contractor on the basis of the loads and functions that the connector must perform, subject to approval by the Works Manager.

7.40. Anchor bolts

All base bolts should be securely in place during installation. During all stages of construction all bolts, threads and nuts shall be protected to prevent damage, corrosion and contamination. The cavities formed to house the base bolts must be kept free and clean of foreign bodies.

7.41. Corrosion protection - Galvanizing

For the metal members (steel) a protection system for galvanizing by hot immersion is foreseen according to UNI 5744/66. The protection systems must be preceded by the preparation of the surfaces, consisting of:

a) degreasing

b) wash

c) pickling

d) wash

e) flushing

f) desiccation.

Furthermore, the preparation must include:

a) preparation of the metal support with sandblasting cleaning to Sa21/2 degree according to

SSPC-SP10/63; procedure to be carried out exclusively with initial state of steel A, B, C, D according to photographic standard SIS 055900/67. Reach proficiency level A21/2, B21/2, C21/2, D21/2. If the metal support does not meet the above photographic standard, it must be brought to that state before the subsequent preparation;

b) preparation of the metal support with Sa3 grade white metal sandblasting cleaning according to SSPC-SP5/63; procedure to be carried out exclusively with initial state of steel A, B, C, D according to photographic standard SIS 055900/67. Reach the degree of preparation ASa3, Bsa3, Csa3.

c) Minimum amount of zinc:

d) 500 g/m² for profiles, pipes, plates, etc.;

e) 375 g/m² for nuts and bolts.

The zinc to be used in the bath must be at least Zn 99.9 quality according to UNI 2013/74. The zinc layer must be uniform and free from cracks, scales, scales and similar defects.

It must adhere tenaciously to the surface of the base metal. The check will be carried out according to CEI 7-6.

On the threaded parts, after galvanizing, no further finishing operations must be carried out by means of a tool, with the exception of the threading of the nuts. After galvanizing, the nuts must be able to screw easily onto the respective bolts and the spring washers, the pins, the threaded collars and the bolts must not have undergone any deformation or alterations in their mechanical characteristics.

8. CHECKS

8.1. Steel for metallic carpentry

The steels used will be carried out, at the discretion and care of the works management, by carrying out a sampling of at least 3 samples for each shipment lot, of a maximum of 30 tons as provided for in point 11.3.4.11.3 - On-site acceptance checks of the NTC 2018 .

For supplies of processed elements from a transformation centre, at the discretion of the Works

Management, the above checks may be carried out at the same transformation centre. In this case, the sampling may be carried out by the Technical Director of the transformation center according to the provisions of the Works Director.

The samples thus checked will be identified and labeled by the Works Supervisor and sent to an official materials testing laboratory accompanied by a specific request for tests signed by the

Supervisor himself. The same provisions as in point 11.3.3.5.3 of the NTC 2018 apply for the methods of taking samples, carrying out the tests and compiling the certificates.

9. TECHNICAL REQUIREMENTS FOR THE EXECUTION OF THE WORKS

9.1.1. Laying of the materials

The contractor shall be follow what is include the Technical sheets of the materials that we use, after approval by COR.

10. SITE ORGANIZATION AND SAFETY

In addition to the provisions of the General Tender Specifications, the following remains established:

1. upon delivery of the works, the contractor must designate by name a technical assignment employed by or registered in a specific professional register with the task of directing the organization of the site and supervising the conditions of safety and use of the manpower, equipment and materials. Said technician is required to always be present on site .

2. The contractor is required, during the preparation of the site, the execution of the works and the folding of the site itself, to observe the rules on accident prevention and occupational hygiene referred to in Presidential Decree 27.04.1955, n.547, to Presidential Decree 07.01.1956, n.164, to Presidential Decree 03.19.1956, n.303, to Legislative Decree 81/2008 and subsequent amendments. mod. and supplement and subsequent provisions even if issued during the course of the works.

3. The contractor has the obligation to comply with the "safety and coordination plan" prepared and delivered to him by the contracting station, or the one amended following the supplementary proposals formulated by him and to comply with the related implementing provisions that will be issued during the works by the "safety coordinator during the execution of the works"; the contractor must also draw up and promote to the works management, in the manner established by the combined provisions of the aforementioned Legislative Decree

81/2008, an operational safety plan that takes into account the organisational, technical, procedural and technological reality of the company itself. In the event of a temporary association of companies or a consortium, the above applies to the agent company or company designated as group leader. In the event that the drafting of the safety and coordination plan is not envisaged, the contractor must draw up and deliver its own replacement safety plan to the

Works Management within the terms established by the Code. It should be noted that the amount of the charges deriving from the implementation of the provisions of the aforementioned construction site safety documents, expressly indicated in the specifications, are understood to be offset and included in the unit and/or bulk prices of the various items of the estimate.