ASHE_18-1025_Design_Analysis_(Seed_project).pdf

31st FIGHTER WING 31st CIVIL ENGINEERING SQUADRON

31st CES/CENM PROJECT MANAGEMENT ELEMENT

Prepared and Submitted by:

Engineering Tools srl Via del Makò, 33 - 33084 Cordenons (PN)

Tel. +39 0434 536333; Fax +39 0434 542813 Email: info@engtools.eu

PROJECT ASHE 18-1025

A/E CONTRACT No. FA5682-17-D-0006; D.O. 0038

RENOVATE/EXPAND FAC.939 FOR EOD

AREA F – AVIANO AB, ITALY

DESIGN ANALYSIS

SUBMITTAL: FINAL (100% design)

Date: February the 28th, 2019

THIS PAGE LEFT INTENTIONNALLY BLANK

RENOVATE/EXPAND FAC. 939 ASHE 18-1025

FINAL (100%) DESIGN ANALYSIS Pag.3 di 38

PREFACE

This Design Analysis provided by ENGINEERING TOOS Srl includes reports, documents and calculations submitted as part of the FINAL (100% design) SUBMITTAL under A/E Contract No. FA5682-17-D-0006, Delivery Order no. FA5682-17-F0038;

Project ASHE 18-1025 “RENOVATE/EXPAND FAC.939 FOR EOD, AREA F, AVIANO AIR BASE, ITALY.

The submittal consists of four parts:

1. Design Analysis (this document). It’s a written narrative showing typical analyses of basic part of the project, including structural, mechanical and electrical features. The document is organized into 5 main chapters: Architectural Works.

Structural Works, Civil Works, Mechanical Works and Electrical Works. The list of related Drawings and all the relevant Annexes complete the document. The document is delivered in one hardcopies and two electronic copies (English).

2. Construction Drawings. A total number of 154 Drawings are delivered as listed in the Design Analysis. Drawings are provided in 4 paper copies, sealed by a Registered Professional, and two electronic copies in .pdf and .dwg formats (combined English and Italian).

3. Specifications and Schedule of Work Items. One paper copy and two electronic copies of Technical Specifications are provided in English.

4. Construction Cost Estimate Breakdown and Government Cost Estimate typed on AF Form 3052 CURRENT VERSION (combined English and Italian) are provided. Construction Cost Estimates is delivered in one paper copies, while Government Cost Estimate is delivered in three paper copies. Both documents are also delivered in two electronic copies (editable format).

5. Additionally, as requested in the Project SOW, the Piano di Sicurezza e Coordinamento (PSC) is delivered in one paper copy and two electronic ones.

Pag.4 di 38 DESIGN ANALYSIS FINAL (100%)

Sommario

SECTION 1: EXISTING CONDITIONS AND SCOPE OF PROPOSED WORK

CHAPTER 1.1 GENERAL

1.1.1 INTRODUCTION

CHAPTER 1.2 ARCHITECTURAL WORKS

1.2.1 INTRODUCTION

1.2.2 EXISTING CONDITIONS

1.2.3 PROPOSED WORKS

1.2.4 PROPOSED WORKS FOR EXISTING BUILDING RENOVATON - REPAIR WORKS

1.2.5 PROPOSED WORKS FOR NEW BUILDING CONSTRUCTION - NEW WORKS

1.2.6 APPLICABLE LAWS AND NORMS

CHAPTER 1.3 STRUCTURAL WORKS

1.3.1 INTRODUCTION

1.3.2 DESIGN LOADS

1.3.3 Seismic parameters

1.3.4 Structure factor

1.3.5 Geotechnical data

1.3.6 APPLICABLE NORMS AND LAWS

CHAPTER 1.4 CIVIL WORKS

1.4.1 PROPOSED WORKS FOR EXTERIOR WORKS AND LANDSCAPING

1.4.2 APPLICABLE LAWS AND NORMS

CHAPTER 1.5 MECHANICAL WORKS

1.5.1 GENERAL

1.5.2 EXISTING CONDITIONS

1.5.3 PROPOSED WORKS

1.5.4 APPLICABLE LAWS AND NORMS

CHAPTER 1.6 ELECTRICAL WORKS

1.6.1 GENERAL

1.6.2 EXISTING CONDITIONS

1.6.3 PROPOSED WORKS

1.6.4 APPLICABLE LAWS AND NORMS

SECTION 2: LIST OF DRAWINGS

SECTION 3: ANNEXES

FINAL (100%) DESIGN ANALYSIS Pag.5 di 38

SECTION 1: EXISTING CONDITIONS AND SCOPE OF PROPOSED WORK

CHAPTER 1.1 GENERAL

1.1.1 INTRODUCTION

Building No. 939 is a one-storey building located in Area F of the Aviano Air Base and is used by the 31st Civil Engineer Squadron Explosive Ordnance Disposal (EOD). The facility was built in recent years and had some internal and external renovations and an expansion of the eastern portion around year 2000 based on a project dated 1996.

It is important to note that, based on the information received, in the southern part of the area the construction of an additional warehouse building is expected shortly.

The building is characterized by a rectangular shape about 45.60m x 12.40m, for a total covered area of approximately 560sqm. The load-bearing structure consists of a reinforced concrete frame with continuous foundations, pillars and beams supporting the inclined roof slab with a total thickness of 20 cm. The waterproofing layer consists of two layers of bituminous membrane over a 10cm rigid insulating panel.

The exterior walls are made up of clay brick masonry with a plaster finishing on both sides and, based on non-invasive surveys and checks carried out so far, there is no insulating layer on the perimeter walls. The internal partitions are mostly in plastered bricks.

External doors and windows consist of an aluminum frame, not always with continuous insulation, and double-glazing of different types. We highlight the presence of continuous sills below windows and doors. Internal windows are made up of wood with plastic laminate.

Interior flooring is mostly in ceramic or clinker tiles. Some portions of the floo are covered by carpet, especially in the offices, and some others in PVC, in the western part of the building (workshop, warehouse and lockers room).

The suspended ceiling consists of mineral fiber panels with exposed metal structure.

The building houses the EOD offices, a training room, a break area, the armory, staff lockers room, a laundry, warehouses and some technical rooms.

The parking area for users and visitors is located in North of the building, separated from the Area F perimeter road by a green protection belt. The external area on the back of the building, included within the perimeter fence, has an asphalt paving with large areas covered by concrete pads. The fence is made up of poles and wire mesh with a protective sheet.

Some small green areas are present, surrounding the building or in the southernmost part of the lot. In this area takes place a building in metallic carpentry, used as a shelter for storage of vehicles and warehouse.

The demolition of this structure is foreseen as part of the project for the construction of the new warehouse building, previously mentioned.

Close to the main building, on the back, there is a wooden structure covered with a PVC sheet that serves as covered outdoor area.

The aim of the intervention is the overall renovation of the existing building, through an internal reorganization of the spaces the construction of a new building connected to the existing one in order to meet the contract requirements and reported in the document "A/E Statement of Work for Project " (SOW) dated June 2017.

Pag.6 di 38 DESIGN ANALYSIS FINAL (100%)

CHAPTER 1.2 ARCHITECTURAL WORKS

1.2.1 INTRODUCTION

The purpose of the survey was to ascertain the current conditions and typology of the finishes and the functionality of the working spaces and to verify on site the works to be performed as per SOW. The survey has been performed on November 22, 2017 at 9:00. During the survey, E.T. team had the possibility to meet the user, SMSgt Mc Dowell of EOD Squadron and Mr. Marco Dalla Torre of 31th CES CENM who explained the customer needs more in detail and indicated few changes to the Statement of Work. Namely:

• As mentioned by Mr. Dalla Torre, his office is soliciting a new project regarding EOD new garages and storage which will be constructed closed to the new expansion and will fulfill all the EOD requirements in terms of equipment storage.

• As presented by SMSgt McDowell, main needs in terms of available space and characteristics of the new and renovated building are:

o More administrative space is needed. It must be capable to house offices for 25 military personnel and 1 contractor position. Both stand-alone (2) and open space offices are anticipated. The precise number of military personnel by rank (which is not expected to grow significantly in the near future) is:

▪ 1 - Capt

▪ 1 - SMSgt

▪ 3 - MSgt

▪ 4 - TSgt

▪ 5 - SSgt

▪ 5 - SrA

▪ 7 - A1C o A sleeping area able to accommodate up to 6 personnel is also needed.

o The new training room which must allow practical training for 25 personnel. The training room is sometimes used for non EOD personnel training. In this case a maximum number of 30 trainees has to be considered.

o The reception area on the right just after the facility entrance is well located and sized and for what the layout is concerned, shall stay as it is.

o The two vault rooms in front of the entrance corridor shall remain as they are.

o Regarding general space distribution, the End Users would prefer having the administrative space as much separated as possible from the sleeping area, kitchen and break room.

o Though the Flight doesn’t comprise female personnel at the moment, in order to size women separate restrooms, a maximum number of 3 female personnel has to be considered.

o No equipment storage has to be anticipated as a new garages and storage compound will be constructed closed the new expansion.

Plans, sections and elevations of the building are shown on Project Drawings.

1.2.2 EXISTING CONDITIONS

1.2.2.1 Exterior Materials

The external façades consist of a plastered and painted clay-brick walls. Based on the non-invasive surveys and checks carried out so far, it is free of any insulating layer, even intermediate. The external doors and windows are composed of an aluminium frame, in many cases without thermal break, and double-glazing of different types. Some windows are equipped with external and internal solar shading. External doors are equipped with panic exit device, for which there is no certification documentation. The waterproofing package consists of a double layer of bituminous membrane laid over an insulating layer of 10 cm thick rigid panels. The roof is slightly sloped toward the storm water drainage system ingluding gutters, downspouts and a dedicated underground drainage system.

1.2.2.2 Interior Materials

Interior flooring is mostly in ceramic or clinker tiles. Some portions of the flooring are covered by carpet floor, especially in the offices, and some others in PVC, in the western part of the building (workshop, warehouse and lockers room).

The internal partitions are made for the most part in plastered and painted brick masonry. Toilets and the laundry room floor and walls are finished with ceramic tiles. The false ceiling is made up of mineral fiber with a metal support structure.

Some internal doors are made up of steel and other ones of wood with plastic laminate.

Based on the documentation provided by the Customer, there is evidence of possible presence of asbestos containing material (ACM) in 4 fire doors inside the building.

FINAL (100%) DESIGN ANALYSIS Pag.7 di 38

We think that it must be considered the Possible presence of other ACM (PACM) at least in gaskets of the boiler and in the waterproofing membranes.

1.2.3 PROPOSED WORKS

Consistently with the indications contained in the document SOW and with what proposed by the user during KO meeting, survey and by email, the project involves the complete reorganization of the existing layout of building 939 and the construction of a new building, located in the rear area, connected by a protected corridor. Therefore the construction of a new building requires the reorganization of the external areas as well.

It is then possible identifying three levels of intervention:

1) existing building renovation (Repair Works)

2) new building construction (New Works)

3) exterior works and landscaping (Civil Works)

Based on the outcome of the indications received during the Review Meeting of 23.01.2018, with particular reference to the future presence of the new warehouse building, as requested by the Customer, compared to what was defined in the Preliminary phase (30%), we’re providing modification in the position of the expansion building. In fact, considering the overlapping and interference between the future warehouse with the projected building, in the present design phase the distance of the building is expected to be enlarged with respect to the existing building, placing the new building at about 5m from the existing building. The simultaneous revision of the location of the building used as a warehouse allows to have a space of respect between the buildings of about 5m.

Regarding the distance between the two buildings (existing renovated one and new one), it has to be noted that upon customer request, the design waives the Italian Laws requirements in terms of minimum distance – 10 m. - between windowed walls pertinent to any kind of building (DM 1444/68 and Consiglio di Stato judgment n. 2749 dated 09 MAY 2011).

Likewise, the distance between the new addition and the EOD Storage building (at the moment under construction) is only 5 meters upon customer request, despite what requested by above mentioned local regulation.

1.2.4 PROPOSED WORKS FOR EXISTING BUILDING RENOVATON - REPAIR WORKS

1.2.4.1 General

The approach to the renovation of the existing building origins from the requirement to keep the administrative and training facilities inside the existing building, preserving the current configuration of the entrance which provides access from the north front in a central position, controlled by the reception, and keep the two vault rooms as they are. The project involves the construction of a central distribution corridor that connects offices, sized according to the specific needs of each activity.

Overall, the offices are able to accommodate a number of employees higher than required by the SOW, ensuring even greater flexibility in the use of these rooms in the future.

The training room will be located in the western part of the building. It is significantly larger than the current one, in order to meet the end user’s needs and, consistently with the SOW, being actually able to accommodate up to 30 people in addition to the speakers. Near this area, in a more central position and in correspondence with the connection to the new building, a group of toilets is anticipated, sized according to the current regulatory standards and corresponding to the accessibility requirements. In relation to choices of a functional organizational nature, we preferred to locate the technical spaces on the southern side of the building, to have them in a more central position and accessible from the outside.

In relation to the implemented design review, the Sprinkler Room is located inside the existing building, with the consequent optimization of the office space. This decision was made to guarantee better access to the fire-fighting technical room, due to the new configuration of the area following the design review

1.2.4.2 Architectural Works

The repair works mainly consists of:

• Complete removal of internal doors and windows with particular attention to the implementation of the procedures required by law for the removal of elements containing asbestos (Fire Rated doors);

• Complete removal of external doors and windows;

• Removal of false ceilings in squares of mineral fiber;

• Demolition of internal masonry partitions;

• Removal of internal coatings;

Pag.8 di 38 DESIGN ANALYSIS FINAL (100%)

• Demolition of perimeter walls to open new holes for windows and doors;

• Removal of the covering mantle in sheath and insulating panels;

• Removal of drainpipes and eaves in sheet metal;

• Demolition of the internal floorings and the related screeds;

• Construction of new aerated floor slab modular system and overlaying floor insulation and vapor barrier;

• Creation of the foundation screeds and internal stoneware flooring;

• New internal partitions and perimeter walls in plasterboard with interposed rock wool panel;

• Installation of external aluminium doors with thermal break and low emission double glazing complete with Venetian blinds and windowsill;

• Installation of interior fire doors;

• Laying ceramic tile coverings in toilets and ancillary rooms;

• Walls painting with washable paint;

• Execution of lightened CMU walls for fire resistant partitions;

• Plastering of the ceiling to obtain the required fire rating;

• Installation of fiber suspended ceilings in all the rooms except for the technical rooms;

• Execution of exterior insulation coating (expanded polystyrene panels) with reinforced carbon fiber finishing.

Installation of a 60cm local natural stone (giallo d’istria) wainscot;

• New insulating and waterproofing layer consisting of vapour barrier, rigid insulating panels and double bituminous waterproofing membrane (walkable);

• Creation of vent chimneys, and miscellaneous roof penetrations for the technical installations;

• Installation of new gutters, downspouts and flashing in sheet metal (cast iron will be used for the lower stretch of the downspouts).

1.2.5 PROPOSED WORKS FOR NEW BUILDING CONSTRUCTION - NEW WORKS

1.2.5.1 General

Based on the indications provided by the user, the new building design aims to collect the support functions to the activity that takes place in the main building. The layout of the building anticipates a sleeping area with 2 double rooms and 2 single rooms, equipped with private toilets, for a total of 6 beds. Closed to the bedrooms the kitchen finds place, as required by end user preferences. The building also houses a break area, which takes advantage from a privileged view towards the south, most enlightened, front and from a direct opening to the outside. Lockers rooms are also located in this new building.

They are divided by gender and appropriately sized according to the standards required by law. Alongside these spaces some ancillary rooms are located, such as the laundry room, the air treatment unit room, the switchboards room and the janitor closed.

The new building is connected to the main building through a closed connection. It is a closed windowed corridor, equipped with large doors.

1.2.5.2 Architectural Works

The new architectural works mainly consists of:

• Excavations;

• Structural construction: cast in place foundation beams, shear-walls and columns, ventilated slab (floor), predalles slab (roof);

• New internal partitions and perimeter walls in plasterboard with interposed rock wool panel;

• Installation of external aluminium doors with thermal break and low emission double glazing, complete with external venetian blinds, roller shutter and sill;

• Installation of ceramic tile finishing (floor and walls) in toilets and ancillary rooms;

• Walls painting with washable paint;

• Lightened CMU fire rated walls;

• Installation of mineral fiber false ceilings in all the rooms except for the technical rooms;

• Execution of exterior insulation coating (expanded polystyrene panels) with reinforced carbon fiber finishing.

Installation of a 60cm local natural stone (giallo d’istria) wainscot;

• New insulating and waterproofing layer consisting of vapour barrier, rigid insulating panels and double bituminous waterproofing membrane (walkable);

• Creation of vent chimneys, and miscellaneous roof penetrations for the technical installations;

FINAL (100%) DESIGN ANALYSIS Pag.9 di 38

• Installation of new gutters and downspout channels in sheet metal with cast iron terminals.

1.2.6 APPLICABLE LAWS AND NORMS

All work shall be done in accordance with appropriate Italian and United States laws, regulations, or codes, whichever is more restrictive at contract award date. This includes any required certification by engineers licensed in Italy and in particular:

List of applicable Laws and Norms for Architectural Works.

1. Design Guide Air Force Civil Engineer Squadron EOD Building;

2. Aviano Air Base Design Guide and Annexes, 2011;

3. UFC 3-101-01, Architecture, 28 Nov 2011 Change 1. 19 Nov 2015;

4. UFC 3-4210-01, Plumbing System, 25 Oct 2004 Change 10. 26 Oct 2015;

5. UFC 3-600-01, Fire Protection Engineering For Facilities, 08 Aug 2016;

6. UFC 4-010-01, DoD Minimum Antiterrorism Standards for Buildings, 09 Feb 2012 Change 1, 01 Oct 2013;

7. UFC 4-610-01 Administrative Facilities, 06 May 2008, Change 2, 21 May 2014;

8. International Building Code, 2015;

9. International Plumbing Code, 2015;

10. NFPA 101, Life Safety Code, 2015;

11. International Fire Code, 2015;

12. Architectural Barriers Act Standards (ABA), 2015;

13. D. Lgs. 81/2008, rev. 2016, Safety on Constructions, Attuazione dell'art. 1 della legge 03 Aug 2007, n. 123, in materia di tutela della salute e della sicurezza nei luoghi di lavoro;

14. D.M. 10 Mar 1998, Criteri generali di sicurezza antincendio e per la gestione dell'emergenza nei luoghi di lavoro;

15. D.M. 22 Feb 2006, Regola tecnica di prevenzione incendi per la progettazione, la costruzione e l’esercizio di edifici e/o locali destinati ad uffici;

16. D.M. 16 Feb 2007, Classificazione di resistenza al fuoco di prodotti ed elementi costruttivi di opere da costruzione;

17. D.M. 03 Aug 2015, Approvazione di norme tecniche di prevenzione incendi, ai sensi dell’articolo 15 del decreto legislativo 08 Mar 2006, n. 139;

18. D.P.R. n. 503 del 24 Jul 1996, Regolamento recante norme per l’eliminazione delle barriere architettoniche negli edifici, spazi e servizi pubblici;

19. D.P.C.M. 05 Dec 1997, Determinazione dei requisiti acustici passivi degli edifici.

Pag.10 di 38 DESIGN ANALYSIS FINAL (100%)

CHAPTER 1.3 STRUCTURAL WORKS

1.3.1 INTRODUCTION

Scope of work - structural works

The original scope of work of BLDG 939 was to renovate an existing facility, without structural works, and to build a new facility to allocate bedrooms, lockers rooms, breaking areas and technical rooms.

After PRE-FINAL (90% design) Submittal the AE was asked to perform also a seismic vulnerability assessment on the existing building. Assessment results are showed in

The new facility will have only one level of 4.65m height (in axis distance) a rectangular shape of dimensions 11.90x30.40m and the total roof area is 407 square meters.

The perimeter's vertical members are in reinforced concrete walls of 25cm thick, internal line has 20x100 cm section wall that support a longitudinal beam and a concrete slab. The stiffness on its plan of the reinforced concrete slabs is such to allow to model them as rigid diaphragms trough master/slave nodes method.

The foundation plan is 1.0 m deep, cast in place foundation beams with section T reverse.

1.3.2 DESIGN LOADS

The design loads have been chosen as the most severe value among the Italian and International Building Code (U.S.A Code). For this reason, hereinafter, for clarity, where necessary, the design value foreseen by both the norms is shown.

1.3.2.1 VERTICAL LOADS

Dead Loads

New prefab slab "Predalles", self-weight H=30cm 420 daN/m2

Roof dead load (sloping bed, impermeabilization) 150 daN/m2

Metal sheet 30 daN/m2

Total dead 600 daN/m2

In the following, values of International and Italian code are compared.

U.S.A Code (International Building Code 2015 and UFC 3-301-01)

The snow load is calculated in the same way of the Italian code because depends on the geographical position and to the description of the site in subject.

UFC 3-301-01 shows for Aviano a load value due to the snow at ground level of 168 daN/m2 .

Italian Code (M.D. dated 14 January 2008)

The load due to the snow can be evaluated by the following formula:

tEskis CCqq = where qs = snow load on the roof μi = shape coefficient qsk = characteristic value of the snow load on the ground level (kN/m2)

CE = exposition coefficient

Ct = thermal coefficient.

Such values depend on the building location, the shape and type of the roof and topography of the area where the building is located.

In compliance with the Italian Code, Aviano is located in the north of Italy, and belongs to the Zone I – Alpina with an above sea level elevation <200m. We have qsk = 150 daN/m2

The Building area has a “normal” topography and the slope of the pitch is 0°< <30°.

The snow load calculated in according with the above data is as below:

Using the formula and related reducing factors as directed by the American and Italian Codes the value of the snow load is equal to:

FINAL (100%) DESIGN ANALYSIS Pag.11 di 38 qs= 120 daN/m2

1.3.2.2 HORIZONTAL LOAD - WIND

Aviano is located in the North of Italy, Region A, Zone 1; class of wrinkledness = D; category of exposition = II

P = qref ce cp cd qref = vref 2/1,6 = 25 2/1,6 = 39 daN/m2

For Buildings with H<10m ce = Kr 2 ct ln (z/zo) 7+ln (z/zo) = 1.80 exposition factor

Kr =0,19 zo = 0,05 m zmin = 4 m z = 4 m cp = 0.8; -0.4 factor shape cd = 1 dynamic factor

P = 92 kg/ m2

Since wind and earthquake are not considered to act simultaneously; wind is not a governing condition.

For loads combinations see calculation on ANNEX S1 - Structural Works: Structural Calculations for NEW Addition.

1.3.3 Seismic parameters

The seismic parameters are defined below with particular reference to NTC 17.01.2018, Update of NTC 14.01.2008, and to the Departmental Memorandum (Circolare Ministeriale) 617/2009.

• Geographical location: Roveredo - Aviano AB Lat. 46.0421 Long. 12.6017

• Soil category: C Topographic category: T1

• Rated life: VN = 50 years Class of use: IV

• Response spectra in SLV, SLD and SLO conditions:

1.3.4 Structure factor

Structural typology according to point 7.3 of NTC 2018:

"Analysis method and check's criteria", tab. 7.3.I

Structure factor:

q = 1.5 non-dissipative structure

During the execution phase the provisions of chapter 4.0 and of the chapter 7.4 of the NTC's as envisaged for non-dissipative constructions will be adopted.

1.3.5 Geotechnical data

Geotechnical framework of the construction site:

below the surface layer of ground to be removed there is a 30m bank consisting of gravel and sand. The water table does not affect the foundation's laying surface.

Soil category C Topographic factor T1

1.3.6 APPLICABLE NORMS AND LAWS

All work shall be done in accordance with appropriate Italian and United States laws, regulations, or codes, whichever is more restrictive at contract award date. This includes any required certification by engineers licensed in Italy and in particular:

List of Applicable Laws and norms for Structural Works.

1. Italian Regulation “DM del 14/01/2008 - Approvazione delle nuove norme tecniche per le costruzioni” (New technical norms on Constructions);

Pag.12 di 38 DESIGN ANALYSIS FINAL (100%)

2. New Italian Regulation “DM del 17/01/2018 - "Aggiornamento delle «Norme tecniche per le Costruzioni»" (Update of New Technical Norms on Constructions);

3. Circular No. 617 February 02,2009 - instructions for applying Technical standards for construction 14.01.2008;

4. Law No. 1086 5/11/1971: “Regulation concerning the execution of reinforced and pre-stressed concrete and of steel structures”;

5. Law No. 64 2/2/1974: “Measures for constructions, with specific prescriptions for seismic zones”;

6. International Building Code ICC IBC-2015;

7. International Existing Building Code IEBC 2012;

8. ASCE/SEI 41-06 Seismic Rehabilitation of Existing Buildings 2006;

9. Unified Facility Criteria (UFC) 3-310-04 dated 20 June 2016 “Seismic Design for Buildings”;

10. Unified Facility Criteria (UFC) 4-010-01 dated 9 February 2010 “Dod Minimum Antiterrorism Standards for Buildings” with changes dated 01 October 2013;

11. UFC 4-023-03 Design of Buildings to resist Progressive Collapse, July 14, 2009;

12. ASCE/SEI 7-10 - 2013 Minimum design loads for buildings and other structures;

FINAL (100%) DESIGN ANALYSIS Pag.13 di 38

CHAPTER 1.4 CIVIL WORKS

1.4.1 PROPOSED WORKS FOR EXTERIOR WORKS AND LANDSCAPING

The interventions on the external areas are mostly necessary to re-organize paths and spaces consistently with the works described above. Access to the area will be regulated by the existing gate. According to the SoW, the removal of the existing western side gate and the subsequent construction of a new motorized sliding gate is anticipated.

As highlighted in the SOW, the replacement of the privacy fencing is expected in order to ensure greater privacy of the outdoor area. The position of the new building interferes with the existing metallic carpentry building, for which the complete demolition is foreseen. For the same reason, civil works are anticipated for the restoration of the underground services interfering with the new construction site. On the basis of the documentation received regarding the status of the existing sub-services, and in relation to the results of the investigations carried out during the surveys, reliable hypotheses have been developed for the overall configuration of the various infrastructural systems. Based on these assumptions, the project includes interventions on the various types of networks to realize the new connections and restorations of existing users. During the survey it was not possible to open some manholes and some lines are still not well known. The effort required to have a clear idea of the existing utilities way exceeds the capacity of an A&E firm and requires the intervention of a company specialized in camera inspections. We highly recommend carrying out such a survey to limit the level of uncertainty and the liability associated in the design.

As far as the storm water management is concerned, according to the Aviano Design Guide, the construction of two draining fields, suitably sized to meet the needs related to the paved areas and the roofs of the two buildings, is anticipated. As the surface of the paved parking are counts for about 150 sqm, no Oil/Water Separator (OWS) will be installed as for Lombardia Regional Law 24 march 2006 n° 4, which sets the limit of this kind of draining surface that require an OWS to 2,000 sqm.

On the northern side of the area, a new organization of the spaces in front of the building is expected in order to meet the AT / FP standards, These works anticipate the creation of a large green area near the building to guarantee the respect of the distance of the parking areas provided by the current regulations on anti-terrorism, penetration and parking. The constraints imposed by the standards set by the UFC 4-010-01 do not allow having the number of parking lots required by the DG Air Force Civil Engineer Squadron EOD Building (60% of staff). To meet the required standard, the possibility of involving the neighbouring areas can be evaluated.

Civil works mainly consists of:

• Demolition of the existing building metal carpentry;

• Removal of existing equipment in the external area;

• Removal of asphalt and cement floors where new buildings and new green areas are anticipated;

• Removal of the external wooden structure;

• Replacement of the shading sheet on the external fence in order to guarantee better privacy inside the area;

• Automation of the two existing gates along the external fence to access the area;

• Implementation of the infrastructure networks related to the existing building and the new building, connected to the existing system and upgrading of the existing ones;

• Construction of draining fields for the collection and drainage of storm water;

• Landscaping;

• Laying of road subgrade and realization of exterior paved areas (roads and walkways);

• Green works

• Implementation of new horizontal and vertical signage

1.4.2 APPLICABLE LAWS AND NORMS

All work shall be done in accordance with appropriate Italian and United States laws, regulations, or codes, whichever is more restrictive at contract award date. This includes any required certification by engineers licensed in Italy and in particular:

List of Applicable Laws and Norms for Civil Works

1. UFC 03-201-01, Civil Engineering

2. UFC 03-201-02, Landscape Architecture (Nov 2009)

3. UFC 03-210-06A, Site Planning, and Design

4. UFC 03-230-01, Water storage, Distribution and Transmission

5. UFC 03-230-19N, Water Supply Systems

6. UFC 04-010-02, DoD Minimum Antiterrorism Standoff distances for buildings (Feb 2012)

7. IBC, International Building Code

Pag.14 di 38 DESIGN ANALYSIS FINAL (100%)

8. Architectural Barriers Act Standards (ABA), 2015;

9. DPR 19 Apr 2005, n.170, Regolamento concernente la disciplina delle attività del Genio Militare

10. DL 09 Apr 2008, n.81 s.m.i., Testo unico sulla salute e sicurezza sul lavoro

11. D.P.R. n. 503 del 24 Jul 1996, Regolamento recante norme per l’eliminazione delle barriere architettoniche negli edifici, spazi e servizi pubblici;

FINAL (100%) DESIGN ANALYSIS Pag.15 di 38

CHAPTER 1.5 MECHANICAL WORKS

1.5.1 GENERAL

As per scope of work, the survey covered the whole existing building. The following mechanical systems are present.

The existing HVAC system consists in an external roof top that serves the entire building with centralized ventilation/air conditioning system (roof top) composed by supply/exhaust ducts, diffusers and grilles. In the training room and in the bathroom some radiators are also installed. In the storage area a fan coil unit is installed. There’s no room dedicated temperature control system or DDC system in the building.

Two natural gas boilers are located in a dedicated boiler room. One is dedicated to the hot water production and the further is reserved for the domestic hot water production. The domestic hot water is stored in a dedicated 300 litre water heater.

The plumbing system of the building serves two bathroom blocks and a kitchen located in the break area.

The natural gas system serves the boiler room and the kitchen in the break area.

1.5.2 EXISTING CONDITIONS

1.5.2.1 HVAC system

The existing system is equipped with a roof top unit installed outside the building. The system doesn’t provide an adequate comfort in each room, as there’s no temperature control and match features in each room. Neither the air flow is properly balanced in each room because air dampers are missing. Due to the tight space above the false ceiling sometime the shape factor is not appropriate.

The existing roof top unit has an airflow capacity of 10.000 m3/h. The fan is not able to modulate implying a severe negative impact on energy consumption. The existing ducts come inside the building from the external roof top unit. These shall be removed and holes on the walls repaired. The roof top unit works only in cooling mode, while the heating is provided from a gas boiler located on the boiler room dedicated to the heating system (not domestic hot water production). The capacity of the boiler for the hot water system is 53kW (net).

1.5.2.2 Plumbing system

The building is connected to the Base water system. The water delivery is on the rear of the building through a pipe that goes out the ground outside the building (bad protected from freezing) and goes in the boiler room. A backflow preventer, pressure reducer devices and a water softener system are installed. The existing water distribution system of the building consists of cold and domestic hot water distribution pipes.

A sewer system is also present. The system pipeline goes out the building in the rear and is connected to an external sewer system.

The domestic hot water production system is provided with a dedicated natural gas fired boiler and with a 300 litre water heater. An 80 litre electrical boiler is also installed. Supplied rooms in the building are the following:

• bathrooms (2),

• laundry;

• break room

1.5.2.3 Fire Protection System (sprinkler)

At the moment BLDG 939 is not provided with a fire suppression system (sprinkler). The facility is classified “Type B” as per IFC (2015) and a sprinkler system is not required. Nevertheless, according to Design Guide for EOD Building, almost all rooms are supposed to be protected by a wet pipe sprinkler system.

We are not sure what criteria are supposed to prevail but we considered that the renovation does not introduce new potential injection sources we think that the installation of a sprinkler system is not required.

The new building can be instead classified “Group R” according to IFC (2015) since the facility includes “the use of a building or structure, or a portion thereof, for sleeping purposes”. Accordingly, the sprinkler system is required for the new facility.

Pag.16 di 38 DESIGN ANALYSIS FINAL (100%)

1.5.2.4 Natural gas system

The gas pressure reducer cabinet system is installed on the rear of the building. The natural gas is delivered to the building with an underground distribution system. The cabinet is located at a distance of about 3 m from the building. A DN32 galvanized steel pipe comes in the building in where the boiler room is located. A manual shut-off valve is also installed externally. From that point a dedicated 3/4” galvanized steel pipe goes along the external wall till the break room, in order to supply also the kitchen.

1.5.3 PROPOSED WORKS

1.5.3.1 Removal

The following existing mechanical systems and related technical spaces will be removed and disposed to public dump if required:

• existing air ducts, diffusers, grilles equipment and fittings in the building;

• existing radiators and fan coil unit and fittings in the building;

• all piping system, pump equipment and fittings in the building;

• boilers, water heater, pipes and plumbing distribution system;

• gas exhaust systems (chimneys and hood cooking);

• sewer systems in the building;

• water treatment system. The existing water system equipment (pump immunizing dosage system, pump, tank, water softener) will be sent back to CEOIH (HVAC) shop (PoC Mr. Valeri Claudio – 335-7806320) by the contractor.

• natural gas system from the building to the pressure reducer cabinet and inside the building. The pressure reducer cabinet shall be removed due to the construction of the new part of the building.

1.5.3.2 Renewable Energy and Energy saving

A calculation is performed in compliance with the law 10/91 and UNI 11300 laws. Regarding the respect of renewable energy quote (D. Lgs. n.28 of the 3 March 2011) it is applicable only for the new portion of the building. For the existing building the mentioned above law is not applicable because the surface of the building is less of 1.000 m2 (art.2, m).

Regarding the photovoltaic system please refer to CHAPTER 1.6 ELECTRICAL WORKS, 1.6.3 PROPOSED WORKS.

The calculation performed on this design stage (60%) confirms (approximately) the preliminary calculation (30% Design).

The model has been developed to determinate the winter and summer load. For the summer load 91kW have been calculated (46kW for building more 45kW for outside air treatment, without the heat recovery support), while for winter load the calculation calls 66kW (34kW for building plus 32kW for outside air, without heat recovery support) as required.

For the calculation see annex A. The calculation shows a building potentially in “A1class” (energy ratings).

1.5.3.3 New Works - HVAC system

The project foresees a building expansion and a renovation for a existing building. Where applicable all equipment shall be compliance to the ERP 2018 (2009/125/CE, Regulation UE 1253/2014 “Eco Design”).

For the entire building (old renovated and new part), the new system will consist of a primary air distribution system (DOAS) of total 966 l/s (3477 mc/h - 2046 cfm), with an associated exhaust air system located in the toilets locker rooms, meeting room, janitor, vault room, corridor (total flow 840 l/s – 3024 mc/h 1779 cfm). Primary air will be supplied directly to the individual spaces through ductwork and diffusers (on false ceiling), during summer and winter time. Exhaust air (from rooms, toilets, janitor, etc.) will be ducted to the related unit and will flow throughout the heat recovery section, to pre-treat the external air. In order to limit the duct, only the supply duct is anticipated for the office rooms. The exhaust air will flow out through the transit grille installed on the door. For the small offices (only 1 person inside), due to the low outside air flow, the exhaust flow goes to the undercut door (10mm). The exhaust air will be taken from the corridor and from the toilets. It is foreseen that the airflow will go also through the corridor which connects the old building to the new part. This way this zone will be ventilated continuously as well.

It has been requested not work in the vault room. The vault room roof has only two duct connections (for the supply and the return air) and the air change shall be ensured by double constant volume boxes. Removing the existing roof top unit and adopting the DOAS system with local fan coil is anticipated to connect the new fan coil at the existing duct (supply and return) and to connect also the return and supply of DOAS system to these ducts, using the adjustable constant volume boxes to avoid imbalances during the system operation.

The DOAS system will be composed by two air handling units (one for each building), ducts, diffusers and fittings. The energy recovery system will be installed in the AHUs to take energy from exhaust side for the outside air. The air handling units will be installed in a dedicated room. Units will be horizontal sectional type, complete with return/exhaust fan, crossed-

FINAL (100%) DESIGN ANALYSIS Pag.17 di 38 flow plate-type heat recovery section with top-mounted outside air intake and exhaust motorized dampers, filter section, pre-heating coil section, cooling coil section, reheating coil section. The outside air will be taken through the intake grille located above the room door. The height of the grille shall be less than 3.0m, but the external zone is not used by vehicles.

This installation is compliant with the UNI EN 13779:2008, Annex A 2.2

The primary air system will meet the requirements of the ASHRAE 62.1 and the UNI 10339 standard and UNI EN 13779 (see the attached sizing in Annex B). The fresh air will be modulated by means of two VAV (delivery and return) boxes in the "training room" room depending on the level of carbon dioxide (monitoring of people present) in order to achieve energy savings. See Annex B.1 for duct calculation.

The production of hot and chilled water will be entrusted to a 4 pipes heat pump (polyvalent type) in order to have at the same time available hot and cold water in every season to make a continuous regulation of humidity and temperature in the rooms. At present, humidification of the outside air is not foreseen as prescribed in the UFC 3-410-01: 2017. The humidification system is not foreseen.

The system is thought to work with the heat pump also with an external temperature of -5 °C, but also a wall mounted boiler shall be installed. It will need to have enough capacity to substitute or integrate the heat pump. The boiler is however necessary to produce domestic hot water at 60°C. In this way the system has the emergency generator of hot water and energy savings can be achieved in case of low external temperature when the heat pump efficiency is low.

The heat pump will be able to produce heat even with an outdoor temperature of -20 °C. In the heat pump circuits, the heat trace cables shall be used as anti-freeze system.

At the service of the heat pump hot water circuit a water storage tank of 800-liters is anticipated. This tank shall be organized also with an external heat exchanger to transfer the heat from the boiler to the heating system circuit. The heat exchanger is necessary to avoid to exceed the 116kW (CPI activity #74.1.A). This heat water storage will accumulate hot water at 45 °C. The terminal units as fan coil, AHU’s coils and radiators shall be supplied at 45°C. The supply system shall be at variable flow with pressure independent valves (PICV) installed on the terminals units.

The heat pump chilled water circuit has a storage tank of 500 liters. The chilled water shall be maintained at 7 °C and at the same temperature will be supplied at the terminals. The supply system shall be at variable flow with pressure independent valves (PICV) installed on the terminals units.

The room heating/cooling will be provided using four-pipe fan coils equipped with a brushless inverter fan with a complete modulation not only of the water valves but also of the ventilation in order to maximize comfort and energy savings. The filter for the fan coil shall be installed on the return grille to ease the maintenance. For the small bathrooms hot water radiators will be provided, while for the AHUs room, boiler room and sprinkler room only the heating wall fan coils are foreseen. In the communication and electrical room autonomous air conditioner unit will be provided. Having hot and cold water both in summer and in winter, controlling the local environmental humidity will also be possible using the hot battery as a post-heating element in cascade to the cold battery that works in cooling and in dehumidification.

The major bathrooms will be heated using the fan coil unit. Even the technical rooms will be equipped with wall fan coil units as anti-freeze protection. In the communication room and electrical room equipped with the UPS unit, autonomous air conditioner unit will be provided.

The new pump units will be equipped with an inverter system (on board the pump) with differential pressure regulation.

Where possible the double pumps it has been foreseen (one for spare).

The choice of the type of system was dictated by the need to use a DOAS system (UFC 3-410-01: 2017 point 3.2) and of the actual dimensions of the existing building that has an under-beam space available of only 20-40cm (for the existing building) and reduced spaces for the installation

The use of a 4-pipe fan coil system allows to air condition only where necessary, saving energy. The cost of a fan coil system is also lower than the cost of a VAV or FPB (fan powered box) system. Each room will be equipped with its own combined temperature/humidity control. The control room device shall be equipped with an override button and shall be digital type

There will be also a window contact and a presence sensor that can stop the fan coil in unoccupied conditions by switching the system to unoccupied mode for each room.

A new boiler (condensing and wall mounted type) with gas exhaust system will be provided for the production of domestic hot water with storage tank and as reserve/integration in case of problems of the heat pump in winter mode.

The design data for the climate zone shall be taken from UNI 10349 law and the Aviano AB Heating and Air Conditioning Policy, the memorandum for all “31st fighter wing”, dated 02 November 2016 (see attached communication in Annex G).

Below a schematic table is reported from the memorandum.

Pag.18 di 38 DESIGN ANALYSIS FINAL (100%)

These values will be used in the sequence operation (setpoint), but not for sizing the system and to determinate the heating and cooling capacity.

The following data it has been considered.

Winter design outside condition:

Outside temperature = -5 °C

Inside building set point temperature:

• office and other space: 20 °C

• communication room: 24 °C (per UFC 3-580-10 point C-3.2)

• mechanical room: 4,5 °C (freeze protection per UFC 3-410-01 point 3-4.3.5)

• electrical room: 4,5°C (freeze protection per UFC 3-410-01 point 3-4.3.5)

Humidity: 45%

The humidity control is done without using a humidifier device so the control cannot be accurate and ensured in the winter season.

Summer design outside condition:

Outside temperature dry bulb temperature = 33°C (UNI 10339) wet bulb temperature = 23,5° (UNI 10339)

Humidity = 45% (UNI 10339)

Inside building setpoint temperature:

• office and other space:

o dry bulb temperature = 25°C o wet bulb temperature = 17,9°C o Humidity 50%

• communication room and UPS room:

o dry bulb temperature = 24°C (per UFC 3-580-10)

Facility use: The facility is an administrative facility. Normal operational hours are assumed to be from 08:00-16:00, Monday through Friday. The bedrooms are assumed to be occupied from 16:00 – 8:00.

Summer Load the following summer thermal load is considered

• lighting: 8W/m2 with diversity factor of 0.5 person (office mansion):

• sensible heat = 63W / person

• latent heat = 69W / person

• workstation = 200W / each

• other local equipment = 200W / room

Breaking area / waiting / kitchen

Sensible (Watt)

FINAL (100%) DESIGN ANALYSIS Pag.19 di 38

• Electric water cooler: 350 W (assumed)

• Vending machines: 250 W (assumed)

• Microwave oven: 600 W (assumed)

• Fridge: 400 W (assumed)

For an electric water cooler, the following criteria has been used: diversity factor = 50%

For some vending machines the following criteria has been used: diversity factor = 50%

For a microwave oven/ fridge the following criteria has been used: diversity factor = 50%

Offices:

Reference: ASHRAE Handbook of Fundamentals 2009, Chapter 18.12, Table 8-9-12)

Sensible (Watt)

• PC Desktop: 65 W (table 8 - note a)

• Flat panel monitor LCD: 30 W (table 8- note c)

• Multifunction (copy, print, scan) small, desktop type: 135 W (table 9)

• Copy machine (laser printer, small office): 320 W (table 12 – Medium/heavy)

• Plotter: 140 W (table 9)

For a computer/monitor the following criteria has been used: diversity factor = 100%

For a printer the following criteria has been used: diversity factor = 50%

To considering a variability of these data inside the room, 200W has been added per default

Meeting room:

It has been considered 800W for other equipment used for the lessons

For the lighting the diversity factor is 1.

Communication Rooms:

(Reference: UFC 3-580-10) rated for 3728 Btu/h each rack

• Rack 1: 1 x 3728 x 0.293= 1092.3 W Say 1.1 kW

• Rack 2: 2 x 3728 x 0.293= 2184.6 W Say 2.2 kW

UPS and electrical Rooms:

It has been considered 2.2kW

The calculation of the winter and summer loads are reported on the Annex A and summarized on the Annex B

The heating piping calculation (primary circuit) is reported on the Annex D.1

The heating piping calculation (secondary circuit) is reported on the Annex D.2

The boiler system calculation is reported on the Annex D.3

The chilled water piping calculation (primary circuit) is reported on the Annex D.4

The chilled water piping calculation (secondary circuit) is reported on the Annex D.5

The expansion tanks calculations for heating and cooling systems are reported in Annex D.6

The chimney calculation is reported in Annex D.8

1.5.3.4 New Works – Control system

The building will be equipped with a direct digital control system (DDC). The system shall be compliant with the UNI 15232 and with UFGS-23 09 23.13 20 and shall be completely programmable. DDC will be connected to all the meters (electrical, nat gas and potable water) when possible.

Each room will be equipped with a local temperature or (temperature/humidity) sensor (digital type) with override button.

The training room shall be equipped with a CO2 sensor to…