Technical Specifications - 191T7026Q0025.pdf

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EMBASSY OF THE UNITED STATES OF AMERICA

Via Veneto 119/A 0187 Rome, Italy

U.S. EMBASSY ROME

CAFETERIA BOILER ROOM REFURBISHMENT

FAC Engineering 05/14/2026

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FOREWORD

The Embassy of the United States in Rome needs to award a contract for the installation of a new HVAC system serving the Embassy’s Cafeteria at the U.S.

Trimission, Via Sallustiana 49, Rome.

GENERAL

The contractor shall supply all the installation materials and equipment, skilled and unskilled labor, technical supervision, as well as logistic and administrative support. The contractor shall also supply all accessory services such as: transportation, leasing, equipment and tools, disposal of debris, cleaning the work area and anything else necessary to complete the project in compliance with the present specifications

The COR may schedule some of the operations to be performed after-hours or during the weekend. These activities shall be performed at no extra cost for the Embassy.

Maximum attention is required for the safety of personnel at work on the site.

The workers shall operate in compliance with standard codes. In view of the fact that the work site consists of crucial technical installations, temporary safety protection measures towards third parties and workers shall be installed with care and attention, especially for the hours when site is closed.

The Contractor shall be responsible for submitting, for approval by the COR, samples of materials and supplies to be used.

It shall be Contractor's responsibility to verify all the quantities and dimensions.

DEFINITIONS

A glossary of terms and relative equivalents used in the drawing up of the tender documents are indicated hereunder:

Client, Administration, Project Supervisor, COR, CO: all these denominations identify the technical administrative staff, predisposed to handle the contract on behalf of the embassy of the United States of America.

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Contracting Company, Contractor: all these denominations identify the subject that undertakes to carry out the work described in the contract.

Contract, Purchase Order (P.O.), Work Order: these terms identify the contract document with which the project is awarded. The Client at his indisputable judgment shall make the formal selection of the different types of documents.

PARKING

No parking is allowed inside Embassy grounds. The Contractor's vehicles shall be allowed to enter only for loading and unloading materials.

Loading and unloading operations shall be carried out using only one vehicle at a time.

Consequently, during the accomplishment of the project the Contractor shall ensure that its vehicles are parked at its own expense outside the Government property.

SAFETY STANDARDS

The Contractor shall comply with all the applicable health and safety obligations provided by Legislative Decree No. 81/2008 (Consolidated Law on Occupational Health and Safety). The main objective is to eliminate or, where not possible, to reduce to the minimum any exposure of workers to risks arising from work-related activities. To this end, the Contractor is required, when applicable, to submit the Risk Assessment Document (Documento di Valutazione dei Rischi – DVR) or the Operational Safety Plan (Piano Operativo di Sicurezza – POS), to provide adequate and documented training to workers, to supply appropriate individual and collective protective equipment (PPE and CPE), and to fully comply with all the other obligations set forth under Legislative Decree 81/2008.

Submission of the Operational Safety Plan (POS)

Within 10 calendar days after receiving the Notice to Proceed, the awarded Contractor must submit a detailed Operational Safety Plan (POS). The POS must clearly identify the following key professional figures:

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Site Technical Director (Direttore Tecnico di Cantiere):

The individual responsible for managing the construction site on behalf of the Contractor. This role may be fulfilled by either an internal employee or an external professional formally appointed by the company. This figure is not to be confused with the Construction Supervisor (Direttore dei Lavori), who is appointed by the Client and is responsible for verifying that the works are carried out in compliance with thedesign and technical specifications.

Supervisor (Preposto):

An individual who, by the nature of their duties, supervises the work of others (e.g., site manager, workshop head, department chief). The Supervisor must be adequately trained to fulfill the responsibilities assigned under Art. 19, paragraph 1, letter g) and in accordance with the objectives of Art. 37 of Legislative Decree 81/2008. The Supervisor shall ensure, continuously and effectively, that:

1. Workers comply with safety instructions and the provisions of the safety plan;

2. Personal protective equipment (PPE) is used as required;

3. Any deficiencies in procedures, tools, PPE, or persistent non-compliance are promptly reported to the employer or manager.

The contractor has to send the list of personnel who will work on site. The workers have to be regularly registered and if there is a subcontractor this has to present the documents requested too. All workers have to understand and speak Italian.

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DESCRIPTION OF WORK

The work consists in:

HVAC Work

Removal and disposal of the two existing boilers and all related piping and equipment. The Contractor will provide disposal certificates to the COR.

Supply and installation of new piping, manifolds, valves, strainers, thermometers (scale range: 0-90 C, Class 1), pressure gauges (scale range: 0- 6 bar, Class 1), expansion tanks as per drawings. Piping shall be treated with anti-rust. All equipment shall be PN16

Supply and install a twin secondary pumps.

Supply and install a DHW recirculating pump.

Supply and installation of a new dirt separator with magnet DN50 Supply and installation of new natural gas piping to feed the new boilers.

Supply and installation of a new natural gas filter, with pressure gauge ports.

Supply and installation of new flexible, closed-cell insulation material with built-in Microban® antimicrobial protection to protect the piping (AF/Armaflex Class 0) and of aluminum finishing.

Supply and installation of new condensing boilers array composed of 2 Gas-fired wall-mounted condensing boiler with modulating stainless steel cylinder burner and Inox-Radial heat exchanger surface. Each boiler shall have a rated heating output range when operating with natural gas of 49 kW.

Boilers shall be equipped with a collector connection kit consisting of a high efficiency boiler circulation pump model Wilo VI Para 25 / 1-11, modular compact hydraulic manifold with double room (supply and return) in one connection flange and gas tap for each boiler.

Supply and installation of a boilers control panel capable of managing the boilers and of communicating with the BAS via BACNet IP.

Supply and installation of the fume collector (including the associated valves) and of the new fumes stack. The new fume collector and fume stacks shall be single wall stainless steel 316L/Ti and must comply with the UNI EN 1856- 1:2009 standard with respective CE marking and designation T200-P1-W-V2- L50-040-O-50. Connection fittings and sleeves with sealing gasket certified according to UNI EN 1856-1: 2009. The new flue shall be resistant to corrosion of liquid products in incoming/vacuum and wet combustion. Ideal for intubation ducts for condensing boilers with a flue gas temperature limited to no more than 120 °C. The installation must be carried out according to the

- 6 -manufacturer's instructions. The realization of the new exhaust system must be performed in full compliance with the obligations established by the local regulations in force. Fume stacks shall be kept in place by dedicated spacers and shall be secured to the wall at their base.

Supply and installation of new drainpipes. The drainpipes coming from the fume stacks and fume collectors shall be routed to a newly installed acid condensate neutralization system

Supply and installation of all the safety devices provided by the Raccolta R on both water and gas sides:

o Safety valve (valvola di sicurezza) o Safety pressure switch, with manual reset (pressostato di sicurezza, riarmo manuale) o Minimum pressure safety switch, with manual reset (dispositivo di protezione o pressione minima, riarmo manuale) o Safety thermostat, with manual reset (termostato di sicurezza ad immersione, riarmo manuale) o Automatic fuel shut-off valve (valvola di intercettazione combustibile automatica) o Flow switch (flussostato)

Supply and installation of an inspectable new plate heat exchanger (100 kW) to disconnect the boilers from the secondary circuit. The heat exchangers shall be insulated with proper insulation material.

Supply and installation of two automatic make-up water filling unit with pressure gauge to be connected to the return piping of the primary and secondary systems.

Supply and installation of an automatic water treatment unit and a 4.5 liters disposable softening cartridge on the make-up water line.

Supply and installation of 1 new 50 liters expansion tanks.

Supply and install a stainless steel (AISI 316L) 300 liters domestic hot water tank with one removable stainless steel heat exchanger.

Supply and install an electrical 1 phase heating resistance (3kW) as a backup for the domestic hot water.

Supply and install an electronic mixing valve for thermal disinfection for

Legionella.

BAS and Electrical work Supply and install PT100 temperature probes to be connected to the BAS system as per drawings

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Supply and install new BAS parts:

o Tracer SC+ o LON Module for Tracer SC+ o UC600 Programmable Controller

Connect new boilers, pumps, and temperature probes to the BAS through AWG 22 and CAT6 LAN cables.

Install dedicated EMT for the BAS cables.

Create new graphic pages and configure all the new equipment with the BAS as per table below. All the IT work needed to configure the new boiler room to the existing BAS (graphic pages, equipment operation rules, etc.) shall be performed by a TRANE authorized technician.

Test and balance of the system. Start-up of the unit must be performed by Manufacturer’s authorized technicians.

Supply and installation of a new electrical panel made of metal carpentry, complete with transparent door (dimensions: 1850x890x240mm). The panel will be equipped with the following devices:

o Shunt trip and related emergency button o Molded-case circuit breaker and GFCI, serving as main disconnector:

4 poles, 100A, Ith: 100A, Im: 1000A, Icu/Icn: 16kA o Mains ON indicator lights, protected by 4P fuses o T1 Surge Protection Device, 4P, protected by 4P fuses o Molded-case circuit breaker and GFCI serving Exhaust fan 1: 4 poles, In: 16A, Ith: 16A, Idn: 0.03 (AC type), Im: 160A, Icu/Icn: 15kA Contactor: In 22A Three positions selector: Auto – 0 – Manual o Molded-case circuit breaker and GFCI serving Exhaust fan 2: 4 poles, In: 16A, Ith: 16A, Idn: 0.03 (AC type), Im: 160A, Icu/Icn: 15kA Contactor: In 22A Three positions selector: Auto – 0 – Manual o Molded-case circuit breaker and GFCI serving the Heating Boiler 1: 2 poles 10A, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn:

10kA – electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 2x(1x1.5)+1G1.5 o Molded-case circuit breaker and GFCI serving the Heating Boiler 2: 2 poles 10A, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn:

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10kA – electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 2x(1x1.5)+1G1.5 o Molded-case circuit breaker and GFCI serving AHU Pump 1: 4 poles, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn: 15kA – electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 4x(1x1.5)+1G1.5 Contactor: In 22A Three positions selector: Auto – 0 – Manual o Molded-case circuit breaker and GFCI serving AHU Pump 2: 4 poles, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn: 15kA – electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 4x(1x1.5)+1G1.5 Contactor: In 22A Three positions selector: Auto – 0 – Manual o Molded-case circuit breaker and GFCI serving the DHW Recirculating Pump 1: 2 poles 10A, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn: 10kA– electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 2x(1x1.5)+1G1.5 Contactor: In 22A Three positions selector: Auto – 0 – Manual o Molded-case circuit breaker and GFCI serving the DHW Recirculating Pump 2: 2 poles 10A, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn: 10kA– electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 2x(1x1.5)+1G1.5 Contactor: In 22A Three positions selector: Auto – 0 – Manual o Molded-case circuit breaker and GFCI serving the Lights: 2 poles 10A, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn:

10kA– electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 2x(1x1.5)+1G1.5 o Molded-case circuit breaker and GFCI serving the Service Outlet: 2 poles 16A, In: 16A, Ith: 10A, Idn: 0.03 (AC type), Im: 160A, Icu/Icn:

10kA– electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 2x(1x2.5)+1G2.5

- 9 -o Molded-case circuit breaker and GFCI serving Spare: 4 poles, In:

16A, Ith: 16A, Idn: 0.03 (AC type), Im: 160A, Icu/Icn: 15kA o Molded-case circuit breaker and GFCI serving the Electric Heater: 2 poles 16A, In: 16A, Ith: 10A, Idn: 0.03 (AC type), Im: 160A, Icu/Icn:

10kA– electrical cable: FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 2x(1x2.5)+1G2.5 o 230V/24Vcc transformer protected by 2P fuses on both the primary and secondary

Replacement of existing light fixtures in the boiler room with LED lighting.

Supply and install a new CAT6 LAN cable to the Power Building in existing conduit

Civil Work

• Demolition of flooring and platforms used for the raised placement (about 15 cm above the floor) of the chiller unit and primary pumps.

• Creation of a new screed sloped (min1%) towards the new drain

• Installation of a new p-trapped drain in the boiler room

• Waterproofing installation on horizontal surfaces and vertical surfaces. The contractor shall install two layers of waterproofing sheets The two layers must be staggered. Minimum height on the vertical surfaces is 30cm.

• Tiling of the room with new porcelain stoneware tiles with slip resistance rating R11. Dimensions and finish to be defined with the COR.

• Fastening and anchoring to masonry of hydraulic pipes, cable ducts, and HVAC systems. Hydraulic pipe clamps must be insulated.

• Skim coating and complete painting of the boiler room, including the ceiling.

• Final professional cleaning of the premises.

The cafeteria must have domestic hot water (DHW) access at all times during regular operating hours (excluding after-hours and weekends). The contractor must execute the work to ensure uninterrupted DHW service to the cafeteria throughout the project duration. If necessary, the contractor must install temporary systems to maintain DHW supply.

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MATERIAL EQUIVALENTS

The Contractor shall verify and ensure that all the 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 manufacturers.

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

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

Different selections implemented by the Contractor shall be approved in advance by Client after submission of samples and technical cards.

HEATING BOILERS

VIESSMANN

www.viessmann.com Vitomodul 200-W 12-98kW

HEAT EXCHANGER

VIESSMANN

www.viessmann.com

GLP-008-M-4-PI-53-1.4401-NBRP

DHW TANK

CORDIVARI

www.cordivari.it

EXTRA 1 INOX

300 liters

EXPANSION TANK

CALEFFI

www.caleffi.com 50 liters

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MAGNETIC DIRT SEPARATOR

CALEFFI

www.caleffi.com 546680

DN50

CIRCUIT BREAKER

ABB

www.abb.it

PIPING INSULATION

ARMACELL

www.armacell.com

AF/ARMAFLEX

PUMPS

GRUNDFOS

www.grundfos.com ALPHA 1 20-40N 150 (Stainless Steel Body)

TPE2 40-150 N-A-F-A-BQQE-EYB

STRUCTURE DEMOLITION SECTION 024116

FAC ENGINEERING ROME 024116 – 1 May 23, 2026 | Rev. 0

SECTION 024116

STRUCTURE DEMOLITION

Technical Specification — Coordinated with Italian / EU Standards

FAC ENGINEERING ROME | May 23, 2026 | Rev. 0

FAC ENGINEERING ROME 024116 – 2 May 23, 2026 | Rev. 0

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract apply to this Section.

B. Related Sections:

1. Section 024119 – Selective Demolition

2. Section 033000 – Cast-in-Place Concrete (for new structural elements after demolition)

3. Section 134813 – Acoustic Equipment Enclosures

1.2 SUMMARY

A. Scope: Complete demolition of existing structures as shown on drawings; including reinforced concrete frames, masonry walls, floor slabs, foundations, and all embedded services within the demolition envelope.

B. Work includes:

1. Pre-demolition survey and structural assessment

2. Disconnection and capping of all utilities within demolition zone

3. Controlled demolition of structural elements

4. Removal and disposal of all demolition debris

5. Controlled demolition methods for reinforced concrete with diamond wire saw, hydraulic splitter, or other controlled technique where vibration or noise limits apply

6. Environmental protection and dust/noise control throughout

C. Do not demolish elements shown to remain. Verify demolition limits with Engineer before commencing each phase.

1.3 DEFINITIONS

A. PSC (Site Safety and Coordination Plan): mandatory safety and coordination plan per D.Lgs. 81/2008 art. 91; prepared by CSP (Design Safety Coordinator).

B. POS (Piano Operativo di Sicurezza): contractor's operational safety plan; per art. 96 D.Lgs. 81/2008.

C. Exclusion from Demolition (Keep): elements, finishes, or structures designated to remain; shown with hatching on demolition drawings.

D. Debris: demolished material; shall be sorted on site into waste streams (concrete, steel rebar, masonry, timber, mixed) for regulated disposal.

E. CER (European Waste Code): EU waste classification code per D.Lgs. 152/2006; demolition contractor to classify all waste streams before transport.

1.4 APPLICABLE STANDARDS

Key Applicable Standards

EN 13670 Execution of concrete structures

EN 1992-1-1 Eurocode 2 – Design of concrete structures

DM 17/01/2018 Norme Tecniche per le Costruzioni (NTC 2018)

UNI EN 12111 Tunnelling machines – road headers, continuous miners and impact rippers

EN ISO 4413 Hydraulic fluid power – general rules and safety requirements for systems

D.Lgs. 81/2008 Consolidated Safety Act – Title IV (Temporary and Mobile Worksites)

D.Lgs. 152/2006 Management of demolition waste – classification and disposal

UNI 11716 Demolition and deconstruction of buildings – guidelines

FAC ENGINEERING ROME 024116 – 3 May 23, 2026 | Rev. 0

EN 474-1 Earth-moving machinery – safety – general requirements

EN 791 Drill rigs – safety

ISO 9613-2 Acoustics – attenuation of sound during outdoor propagation

UNI EN 1992-1-1 Eurocode 2 – Design of concrete structures

UNI EN 206 Concrete – specification and performance

DM 17/01/2018 Norme Tecniche per le Costruzioni (NTC 2018) – Italian technical standards for construction

Circ. 21/01/2019 n.7 NTC 2018 application instructions

D.M. 37/2008 Building systems – installer qualifications and requirements

D.Lgs. 192/2005 e s.m.i. Energy performance of buildings

D.Lgs. 81/2008 Consolidated Workplace Safety Act

D.P.R. 380/2001 Consolidated Building Code

1.5 SUBMITTALS

A. Pre-demolition structural survey: signed by structural engineer; identifying condition of elements, asbestos/hazardous materials survey, and demolition sequence recommendation.

B. Demolition plan (Piano di Demolizione): per D.Lgs. 81/2008 Allegato IX; phased sequence; shoring and propping requirements; vibration and noise predictions.

C. POS (Piano Operativo di Sicurezza): specific to demolition contractor activities; before commencement.

D. Waste management plan: CER codes for each waste stream; licensed carrier details; disposal facility acceptance certificates.

E. Vibration monitoring plan: sensor placement, threshold levels, and response protocol; where demolition is within 20 m of existing structures to remain.

F. Noise management plan: where works are within 200 m of noise-sensitive receptors; per D.P.C.M.

01/03/1991.

1.6 QUALITY ASSURANCE

A. Demolition contractor: qualified with evidence of prior RC demolition projects of comparable size; submit references.

B. Safety: D.Lgs. 81/2008 Titolo IV governs all site operations; PSC and POS mandatory; CSE

(Coordinator for Execution) to be appointed by Client.

C. Asbestos: if asbestos-containing materials are identified, stop demolition; notify authority (ASL) per

D.Lgs. 81/2008 art. 246; engage specialist asbestos removal contractor before resuming.

D. Vibration limits: peak particle velocity (PPV) per DIN 4150-3 at retained structures; limit as noted or ≤ 5 mm/s at foundations of structures to remain.

E. Dust: wet suppression or screening mandatory when demolishing masonry or concrete; no dry sweeping of debris on or near access routes.

1.7 UTILITY DISCONNECTION

A. Before demolition commences: identify, isolate, test dead, and cap or remove all utilities within demolition envelope.

B. Sequence: electricity (cut and cap at distribution board); gas (cap at service); water (drain and cap);

telecoms (cut and cap); district heating/cooling (drain and cap).

C. Obtain written confirmation from each utility company that services are disconnected before starting demolition near service routes.

FAC ENGINEERING ROME 024116 – 4 May 23, 2026 | Rev. 0

PART 2 – PRODUCTS

2.1 DEMOLITION METHODS AND EQUIPMENT

A. Mechanical demolition: hydraulic excavator with breaker or crusher jaw; for unrestricted demolition areas away from retained structures.

B. Controlled demolition – RC: diamond wire saw, wall saw, floor saw, or hydraulic rock splitter; where vibration must be minimised (< 5 mm/s PPV at adjacent structures).

C. Hand tools: electric or pneumatic demolition hammers for small-scale and precision work; concrete saws for cutting openings in slabs.

D. Craneage: where large elements are to be cut and lowered by crane; structural calculations for lifting weights required.

E. Prohibition: explosive demolition not permitted without written approval from Engineer and local authority.

2.2 SHORING AND PROPPING

A. Provide temporary shoring to all retained structural elements that may be affected by removal of adjacent structure.

B. Design: temporary works engineer to design all shoring systems; calculations submitted before installation.

C. Materials: steel props, acrow props, or structural timber; rated for imposed loads; no improvised propping.

D. Maintain shoring until permanent structure can take loads; do not remove until directed by Engineer.

2.3 PROTECTIVE MEASURES

A. Hoarding: solid timber or steel hoarding around demolition zone; 2.4 m minimum height; warning signs and site lighting.

B. Debris netting: scaffold with fine-mesh debris netting on all open faces of demolition; prevent projectiles.

C. Dust suppression: continuous water misting during breaking; site water supply and pump as required.

D. Vibration monitoring: continuous monitoring at nearest retained structure during all breaking;

automatic alarm at 80% of limit; stop work at 100%.

PART 3 – EXECUTION

3.1 EXAMINATION AND PRE-DEMOLITION SURVEY

A. Carry out comprehensive visual survey of all elements to be demolished; note condition, structural system, and any deviation from drawings.

B. Survey adjacent retained structures for pre-existing cracks and defects; photographically document condition before demolition.

C. Test all utility isolations before commencing; use voltage detector and pressure gauge as appropriate.

3.2 DEMOLITION SEQUENCE

A. Demolish in reverse order of construction: remove fit-out and secondary elements first; then non-structural partitions; then structural floors from top down; then frames; finally foundations.

B. Maintain stability of remaining structure at all phases; do not create cantilever conditions not accounted for in demolition plan.

C. At each phase boundary: pause, inspect, consult with structural engineer if any concern, confirm next phase before proceeding.

D. Do not allow overloading of floors or slabs with demolition debris; remove debris progressively.

3.3 REINFORCED CONCRETE DEMOLITION

A. Breaking: hydraulic breaker where vibration is not restricted; diamond sawing where vibration must be controlled.

FAC ENGINEERING ROME 024116 – 5 May 23, 2026 | Rev. 0

B. Rebar: cut flush with concrete surface where adjacent to retained structure; bend and cap protruding rebar if left in place during construction phase.

C. Foundations: break to full depth shown; remove all concrete from foundation pit; clean base for new construction.

D. Dust from cutting: diamond saw blade with integral water cooling; apply dust suppression at all cutting locations.

3.4 WASTE MANAGEMENT

A. Sort demolished materials on site into CER-classified streams:

1. Concrete and masonry: CER 17 01 01 (concrete) – inert; suitable for licensed inert landfill or recycled aggregate

2. Mixed metals (rebar, steel sections): CER 17 04 05 – recyclable; to licensed metal recycler

3. Timber: CER 17 02 01 – if untreated, compostable; if painted/treated, hazardous waste stream

4. Mixed demolition waste: CER 17 09 04 – to licensed non-hazardous construction waste facility

5. Asbestos (if encountered): CER 17 06 05 – hazardous; specialist contractor only; notify ASL

B. Maintain waste transfer records (Formulario di Identificazione Rifiuti – FIR) for all transported waste;

retain for 5 years.

C. Maximum re-use of demolition materials on site (recycled aggregate for sub-base, fill) where quality permits; document in waste management plan.

3.5 COMPLETION AND SITE CLEARANCE

A. Remove all temporary shoring only after permanent structure can carry loads (written Engineer instruction).

B. Clear site of all demolition debris; wash down hardstanding with water; clean drainage gullies.

C. Survey retained structures for new damage; repair any damage attributable to demolition operations.

D. Submit waste disposal records to Engineer before final payment.

END OF SECTION 024116

CAST-IN-PLACE CONCRETE SECTION 033000

FAC ENGINEERING ROME 033000 – 1 May 23, 2026 | Rev. 0

SECTION 033000

CAST-IN-PLACE CONCRETE

FAC ENGINEERING ROME 033000 – 2 May 23, 2026 | Rev. 0

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract apply to this Section.

B. Related Sections:

1. Section 024116 – Structure Demolition

2. Section 024119 – Selective Demolition

3. Section 336316 – Pre-Insulated Underground Piping Systems (thrust blocks and anchor blocks)

4. Section 232123 – Hydronic Pumps (inertia blocks for pump base)

1.2 SUMMARY

A. Scope: Furnish and place all cast-in-place concrete work as shown on structural drawings, including:

equipment foundation pads, pump inertia bases, equipment housekeeping pads, pipe thrust blocks, retaining walls, and new structural elements following demolition.

B. Included work:

1. Concrete mix design and batching

2. Formwork design and construction

3. Reinforcement placing

4. Concrete placement, compaction, and curing

5. Surface finishing

6. Embedded items and anchor bolts

1.3 DEFINITIONS

A. Exposure class (XC, XF, XS): EN 206 classification of environmental conditions; determines minimum cement content, w/c ratio, and cover requirements.

B. Characteristic strength (fck): characteristic (5th percentile) compressive strength of 150 mm cube or

150 × 300 mm cylinder at 28 days.

C. w/c ratio: water-to-cement ratio by mass; lower w/c = higher strength and lower permeability.

D. Cover: distance from outer surface of concrete to nearest reinforcing bar face; protects rebar from corrosion.

E. Non-shrink grout: cementitious or epoxy grout with zero or positive volume change on hardening; used for precision equipment bases.

EN 206:2013+A2:2021 Concrete – specification, performance, production and conformity

EN 1992-1-1 Eurocode 2 – Design of concrete structures – general rules

EN 13670 Execution of concrete structures

EN 10080 Steel for reinforcement – weldable reinforcing steel – general

EN 12390-1 to -13 Testing hardened concrete (series)

EN 12350-1 to -7 Testing fresh concrete (slump, air content, temperature, etc.)

EN 197-1 Cement – composition, specifications and conformity criteria (CEM classes)

EN 934-2 Admixtures for concrete, mortar and grout – concrete admixtures

EN 1008 Mixing water for concrete – specification and conformity

FAC ENGINEERING ROME 033000 – 3 May 23, 2026 | Rev. 0

DM 17/01/2018 Norme Tecniche per le Costruzioni (NTC 2018)

Circ. 21/01/2019 n.7 Istruzioni per l'applicazione NTC 2018

UNI EN 1537 Execution of special geotechnical works – ground anchors

D.Lgs. 81/2008 Consolidated Workplace Safety Act – Title IV (construction sites)

UNI EN 1992-1-1 Eurocode 2 – Design of concrete structures

UNI EN 206 Concrete – specification and performance

DM 17/01/2018 Norme Tecniche per le Costruzioni (NTC 2018) – Italian technical standards for construction

Circ. 21/01/2019 n.7 NTC 2018 application instructions

D.M. 37/2008 Building systems – installer qualifications and requirements

D.Lgs. 192/2005 e s.m.i. Energy performance of buildings

D.Lgs. 81/2008 Consolidated Workplace Safety Act

1.5 SUBMITTALS

A. Concrete mix design: for each class; mix proportions, w/c ratio, admixtures, aggregate grading, fresh and hardened properties; from ready-mix plant laboratory.

B. Conformity documentation: EN 206 conformity certificates from concrete producer; initial strength tests (Type Testing); identity testing plan.

C. Reinforcement certificates: EN 10080 mill certificates for all reinforcing steel; heat number cross-referenced to bar tags.

D. Admixture data sheets: product data and compatibility with cement type.

E. Formwork drawings: where formwork is complex or props are required; engineer-stamped calculations for loads.

F. Embedded item schedule: all anchor bolts, inserts, sleeves, and cast-in items; locations and tolerances.

1.6 QUALITY ASSURANCE

A. Concrete producer: certified per EN 206 by an accredited certification body (e.g., ICMQ); identity testing on each delivery.

B. Concrete inspection: a qualified concrete technician shall be on site during all concrete pours;

supervise sampling, slump testing, and cube taking.

C. NTC 2018: all structural concrete shall conform to Chapter 11 of NTC 2018; RcK (characteristic compressive strength) as specified on structural drawings.

D. Cube/cylinder testing: minimum 3 specimens per 100 m³ or per pour, whichever is more frequent;

tested at 7 and 28 days; records submitted to Engineer.

E. Reinforcement: inspection of bar placement, covers, lapping, and tie wire before each pour;

photographic record submitted.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Reinforcement: store on raised bearers, free of mud; separate by size and heat number; protect from corrosion; do not use heavily rusted or pitted bars.

B. Admixtures: store per manufacturer's instructions; do not use if shelf life exceeded; separate incompatible admixtures.

C. Ready-mix concrete: maximum transport time from batch plant 60 minutes at ≤ 25°C; 45 minutes at >

25°C; do not add water on site after delivery.

FAC ENGINEERING ROME 033000 – 4 May 23, 2026 | Rev. 0

1.8 WARRANTY

A. Concrete works: structural performance warranty 10 years; cosmetic finish 1 year.

PART 2 – PRODUCTS

2.1 CONCRETE MIX DESIGN

A. Standard structural concrete: Class C25/30 (fck,cyl/fck,cube); exposure class XC2 (permanently wet) for foundations; XC1 (dry) for internal slabs; w/c max 0.55 for XC2.

B. Equipment foundation pads and inertia blocks: Class C30/37; w/c ≤ 0.50; aggregate max 20 mm;

superplasticiser admixture to achieve S3 slump with reduced w/c.

C. Lean concrete blinding: Class C16/20; no specific exposure class; placed before reinforced elements.

D. Minimum cement content: 300 kg/m³ for XC2; 260 kg/m³ for XC1.

E. Cement type: CEM II/A-L 42.5 R (blended) or CEM I 42.5 N; sulphate-resistant CEM III/B or SR cement if sulphates present in soil.

F. Aggregates: natural rounded or crushed; clean; maximum 20 mm for slabs and foundations; 10 mm for fine sections (< 100 mm).

G. Admixtures: superplasticiser (polycarboxylate-based) for workability; retarder for pours in summer

(ambient > 25°C) or long haul; air-entraining admixture for exposed horizontal surfaces subject to freeze-thaw.

2.2 REINFORCEMENT

A. Grade: B450C (Italian standard per NTC 2018) or equivalent EN 10080 ductility class C; characteristic yield strength 450 MPa; characteristic ultimate strength 540 MPa; ductility class C (high ductility) for seismic applications.

B. Form: deformed bars (ribbed) per EN 10080; diameters as shown on drawings; do not substitute different bar diameters without Engineer approval.

C. Welded mesh: where specified; EN 10080; B500A or B500B grade.

D. Spacers and chairs: plastic clip spacers or pre-cast concrete chairs; maintain specified cover ± 5 mm.

2.3 FORMWORK

A. Material: plywood (moisture-resistant, minimum 18 mm) or steel panel forms; designed for fresh concrete pressure per EN 12812 or CIRIA Report 108.

B. Release agent: form oil or wax release agent; compatible with any applied surface finishes; no diesel or motor oil.

C. Striking times: follow EN 13670 and structural engineer's specification; accelerated by heated curing or warm ambient; never strip before 16 hours for walls and columns at normal temperature.

D. Tie rods: break off flush with surface after striking; make good with matching mortar.

2.4 EMBEDDED ITEMS

A. Anchor bolts: hot-dip galvanised steel threaded rod; grade 8.8; size and pattern per equipment manufacturer or structural drawings; positional tolerance ±3 mm from drawing location.

B. Pipe sleeves: galvanised steel or PVC sleeve; diameter = pipe OD + 50 mm each side; waterproofed after pipe installation with elastomeric sealant.

C. Setting templates: fabricate templates for anchor bolt groups; survey-set with optical level before pour;

check after pour.

2.5 NON-SHRINK GROUT

A. Application: beneath equipment base plates, pump bases, and anchor bolt pockets after equipment alignment; ≥ 20 mm and ≤ 50 mm bed thickness.

B. Type: cementitious non-shrink grout; zero or slight expansion; compressive strength ≥ 40 MPa at 28 days; free-flow consistency (no tamping required).

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C. Preparation: clean steel base plate; chip concrete surface to expose aggregate; dampen surface; install dams around base plate; mix grout to manufacturer consistency; pour in one operation.

PART 3 – EXECUTION

3.1 EXAMINATION

A. Inspect formwork for alignment, watertightness, and correct dimensions before placing reinforcement.

B. Confirm anchor bolt template positions with survey; record as-set coordinates before concrete placement.

C. Inspect reinforcement: bar sizes, spacings, laps, and covers; sign-off by Engineer before concreting.

3.2 CONCRETE PLACEMENT

A. Verify slump or flow class on delivery ticket; test slump on site; reject any load deviating more than 30 mm from specified class or showing signs of segregation.

B. Place concrete continuously within one pour; maximum free fall 1.0 m; use tremie pipe or conveyor for deeper pours.

C. Compact with internal vibrator (poker diameter 38–75 mm); 300–500 mm insertion depth; 300 mm maximum vibrator spacing; 5–10 s per insertion; withdraw slowly.

D. Do not vibrate directly against reinforcement or embedded items; avoid over-vibration causing bleed and segregation.

E. Hot weather (> 30°C ambient): pre-cool aggregates or mixing water (ice); concrete temperature at delivery ≤ 30°C; pour at cooler parts of day; begin curing immediately on finishing.

F. Cold weather (< 5°C): protect fresh concrete from freezing; insulate formwork; do not strip until cured to minimum 5 MPa.

3.3 SURFACE FINISHING

A. Equipment pads: steel-trowel finish to flatness F4 (3 mm under 2 m straight edge); level within ±2 mm of design level.

B. General foundations: wood-float finish; no surface defects deeper than 5 mm; fill honeycombing with dry-pack mortar after striking.

C. Inertia blocks: machine-anchor-bolt templates to 0.1 mm; finish top face steel-trowel; apply epoxy primer to top face before equipment installation.

3.4 CURING

A. Cure concrete for minimum 7 days at ≥ 10°C per EN 13670.

B. Curing methods (in preference order): polythene sheeting (sealed edges); hessian wet and polythene covered; curing compound (ASTM C309 type); water-ponding on horizontal surfaces.

C. Begin curing immediately after finishing; no delay; protect from solar radiation and wind on hot days.

D. Do not apply surface treatments (sealers, coatings) before 28-day strength is achieved and surface is dry.

3.5 TESTING

A. Take cube/cylinder specimens at the point of discharge into formwork (not from truck); label with pour reference, date, and location.

B. Test at 7 days (information) and 28 days (conformity); results to EN 206 conformity criteria.

C. Submit test results to Engineer within 7 days of test; identify any failing results immediately; do not proceed with subsequent pours without Engineer approval if results fail.

D. Where in-situ cores are required (doubt on strength): take per EN 12504-1; interpret per EN 13791;

minimum 3 cores per area of concern.

3.6 EQUIPMENT BASE INSTALLATION

A. After concrete achieves minimum 70% of design strength: set equipment in position; check level and alignment; install levelling wedges or shims; make final alignment check.

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B. Pour non-shrink grout; maintain dams; fill all voids beneath base plate; remove dams after curing (24–48 h).

C. Install anchor bolt nuts and torque to manufacturer's specification after grout achieves 80% of rated strength.

END OF SECTION 033000

DOMESTIC WATER THERMOSTATIC MIXING VALVE (LEGIONELLA CONTROL) SECTION 221119

FAC ENGINEERING ROME 221119 – 1 May 23, 2026 | Rev. 0

SECTION 221119

DOMESTIC WATER THERMOSTATIC MIXING VALVE

(LEGIONELLA CONTROL)

FAC ENGINEERING ROME 221119 – 2 May 23, 2026 | Rev. 0

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract apply to this Section.

B. Related Sections:

1. Section 232500 – HVAC Water Treatment (Legionella prevention programme for HVAC water;

reference framework)

2. Section 232116 – Hydronic Specialties (backflow preventers at DHW fill connection)

3. Section 230519 – Meters and Gauges for HVAC Piping (DHW temperature sensing)

4. Section 230900 – Instrumentation and Controls for HVAC (BMS integration of mixing valve)

5. Section 230553 – Identification for HVAC Systems (DHW pipe labelling)

6. Section 230716 – HVAC Thermal Insulation (DHW pipe insulation)

7. Section 223533 – Indirect-Fired Domestic Water Storage Heaters (DHW source upstream of this mixing valve)

8. Section 235216 – Modular Wall-Hung Condensing Boilers (primary heat generator)

1.2 SUMMARY

A. Scope: Furnish and install electronic thermostatic mixing valve(s) for domestic hot water (DHW) systems with programmable thermal disinfection cycle for Legionella control, complete with integral controller, BMS interface, sensors, and accessories.

B. Function:

1. Maintain DHW user-outlet temperature at a safe, scald-free setpoint (typical 45 °C) under varying flow and supply-temperature conditions

2. Periodically and automatically raise the entire accessible DHW recirculation loop temperature to

≥ 65 °C for a programmed dwell time, thermally disinfecting the loop against Legionella spp.

per the Accordo Stato-Regioni 7 maggio 2015 guidelines

3. Log disinfection cycle execution (date, time, achieved temperature, dwell time) for retention in the Water Safety Plan documentation

4. Communicate status, alarms, and disinfection-cycle logs to the BMS

C. Required type: electronic programmable thermostatic mixing valve with periodic thermal-shock disinfection capability, of a recognised manufacturer specialising in DHW Legionella-control devices, with the performance characteristics defined in Article 2.1.

D. Required for: all DHW distribution networks serving multiple sanitary fixtures with recirculation loop, sized as required by the project DHW demand calculation.

1.3 DEFINITIONS

A. DHW (Domestic Hot Water): potable hot water distributed to sanitary fixtures (basins, showers, sinks).

B. Recirculation loop: dedicated return pipe with circulating pump maintaining DHW at delivery temperature throughout the distribution network, ensuring acceptable wait time at remote outlets and preventing stagnation.

C. Thermal disinfection (thermal shock): periodic operating mode in which the entire DHW distribution and recirculation loop is heated to a temperature sufficient to inactivate Legionella spp. — typically ≥

60 °C continuous, with a thermal-shock cycle reaching ≥ 70 °C for ≥ 30 minutes at the farthest point of the loop, per the Accordo Stato-Regioni 7 maggio 2015 (Linee Guida Legionellosi).

D. Scald protection: delivered DHW temperature limited to a safe value (typically ≤ 45 °C for general use, ≤ 38 °C for paediatric / elderly / disabled-access facilities) to prevent scalding at the point of use, per

UNI EN 1287.

E. Electronic programmable thermostatic mixing valve: thermostatic mixing valve with NTC temperature sensors, integral programmable controller, and BMS communication; automates daily / weekly / time-of-day disinfection cycles and records each cycle in non-volatile memory.

FAC ENGINEERING ROME 221119 – 3 May 23, 2026 | Rev. 0

Key Applicable Standards

UNI EN 1287 Building valves – low-pressure thermostatic mixing valves – tests and requirements

UNI EN 15092 Building valves – in-line hot-water tempering valves – tests and requirements

UNI EN 1717 Protection against pollution of potable water (backflow prevention)

UNI EN 806-2 Specifications for installations inside buildings conveying water for human consumption – design

UNI EN 806-3 Specifications for installations inside buildings conveying water for human consumption – pipe sizing

UNI 9182 Impianti di alimentazione e distribuzione d'acqua fredda e calda – criteri di progettazione, collaudo e gestione

Accordo Stato-Regioni 7 maggio 2015, Rep. 79/CSR

Guidelines for the Prevention and Control of Legionellosis (Linee Guida)

WHO Water Safety Plans 2007 WHO – Water safety plans for buildings (Legionella risk control)

D.M. 174/2004 Materials in contact with water intended for human consumption (potable water materials)

D.Lgs. 81/2008 art. 271 Workers' protection against biological risks (Legionella)

D.Lgs. 31/2001 Water intended for human consumption (transposes EU Directive)

Reg. (UE) 305/2011 (CPR) Construction Products Regulation – CE marking for valves

D.M. 37/2008 Building systems – installer qualifications and requirements

D.Lgs. 192/2005 e s.m.i. Energy performance of buildings

D.Lgs. 81/2008 Consolidated Workplace Safety Act

1.5 SUBMITTALS

A. Product data: manufacturer's technical data sheet for the proposed mixing valve; Kv coefficient, working pressure range, temperature range, accuracy, repeatability.

B. Sizing calculation: flow-rate sizing per UNI EN 806-3 and UNI 9182 for the project DHW demand;

verify that the selected valve Kv at the project ΔP allows the design DHW flow with margin.

C. Legionella control plan integration: statement confirming integration of the mixing-valve disinfection cycle into the overall project Water Safety Plan; cycle schedule, target temperature, dwell time, and log retention period.

D. Material conformity: D.M. 174/2004 declaration for all wetted components (potable water contact); CE marking per Reg. (UE) 305/2011; backflow-prevention compatibility with EN 1717.

E. BMS integration: point list (BACnet object list or Modbus register map) for status, setpoint, disinfection-cycle command and feedback, alarm outputs; coordinated with Section 230900.

F. Wiring diagram: electrical connections of the valve actuator, NTC sensors, and BMS interface; control voltage; alarm contact ratings.

1.6 QUALITY ASSURANCE

A. Valve certification: CE marked per Reg. (UE) 305/2011; tested per UNI EN 1287 (low-pressure thermostatic mixing valves) and UNI EN 15092 (in-line hot-water tempering valves) as applicable to the valve type.

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B. Potable water compliance: all wetted parts (body, internal components, seals) shall comply with D.M.

174/2004 for materials in contact with water intended for human consumption; manufacturer's declaration submitted.

C. Legionella programme compliance: the disinfection cycle (frequency, target temperature, dwell time) shall comply with the Accordo Stato-Regioni 7 maggio 2015 (Linee Guida Legionellosi) as integrated into the Owner's Water Safety Plan and risk-assessment document.

D. Installer: licensed plumbing contractor per D.M. 37/2008 (impianti idrici); minimum 5 years' experience.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver in manufacturer's protective packaging; do not remove plug-end caps until installation.

B. Store in clean, dry, frost-free conditions; protect electronic controller from moisture, dust, and impact.

C. Inspect for transit damage on delivery; reject any unit with visible damage to actuator, controller display, or sensor connections.

1.8 WARRANTY

A. Mixing valve and integral controller: 1 year from Substantial Completion.

B. Disinfection-cycle logging functionality and BMS interface: 1 year including firmware updates.

PART 2 – PRODUCTS

2.1 ELECTRONIC THERMOSTATIC MIXING VALVE

A. Type: electronic programmable thermostatic mixing valve with integral programmable disinfection controller, of a recognised manufacturer specialising in DHW Legionella-control devices.

B. Construction:

1. Body: dezincification-resistant (DZR) brass; D.M. 174/2004 compliant

2. Cartridge: thermostatic element + electrically-driven modulating actuator overriding the thermostatic setting during disinfection cycle

3. Seals: EPDM peroxide-cured for potable water service

4. Connections: threaded BSP (DN 20 – DN 50) or flanged (DN 65 and above) per project size schedule

C. Performance:

1. Temperature regulation accuracy: ±1 °C of setpoint at design flow

2. Hot inlet temperature range: 50 °C to 85 °C

3. Cold inlet temperature range: 5 °C to 25 °C

4. Maximum operating pressure: 10 bar (PN 10)

5. Maximum hot/cold inlet pressure ratio: 2:1 (per UNI EN 1287)

6. Internal anti-scald mechanism: automatic shut-off of hot inlet on cold-water-supply failure

D. Sizing:

1. Sized for the project DHW peak demand per UNI EN 806-3 and UNI 9182

2. Pressure drop at design flow: ≤ 30 kPa (target ≤ 20 kPa)

3. Verify minimum flow ≥ 10% of maximum, per manufacturer's published turndown

2.2 INTEGRAL DISINFECTION CONTROLLER

A. Controller features:

1. Backlit LCD display showing inlet/outlet temperatures, setpoint, cycle status, and alarm history

2. Programmable user setpoint (default 45 °C); programmable disinfection setpoint (default 65 °C)

3. Programmable disinfection schedule: time of day, day of week, frequency (default weekly, recommended daily for high-risk facilities)

4. Programmable disinfection duration: dwell time at setpoint (default 30 minutes minimum)

5. Two NTC immersion temperature sensors: outlet mixed-water temperature, and recirculation-return temperature (verifies disinfection reached the farthest accessible point of the loop)

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6. Disinfection-cycle log retention: minimum 13 cycles (last cycles stored in non-volatile memory)

7. Optional thermal-shock 'peak' cycle: 70 °C dwell for shorter duration as alternative to 65 °C extended dwell

B. Power supply: 230 VAC, 50 Hz; integral battery backup for clock and log memory during power outage

(≥ 30 days).

C. Protection class: IP 54 enclosure for the controller; IP 65 connecting cable glands.

2.3 BMS INTEGRATION

A. Communication interface: BACnet/IP or BACnet MS/TP as standard (ASHRAE 135 / EN ISO

16484-5); Modbus RTU/TCP as legacy alternative; integration per Section 230900.

B. Minimum BMS data points:

Parameter BACnet Object /

Modbus Reg.

R/W Notes

Outlet mixed-water temperature AI R °C; primary control feedback

Recirculation-return temperature AI R °C; confirms loop coverage

Hot inlet temperature AI R °C; from DHW generator

Cold inlet temperature AI R °C; from cold mains

User setpoint AV R/W °C; default 45

Disinfection setpoint AV R/W °C; default 65 / optional 70

Disinfection cycle status MV R Idle / Heating / At-setpoint / Cooling /

Complete / Fault

Disinfection cycle command BV R/W Manual trigger by BMS

Disinfection schedule active BV R/W Enable/disable automatic schedule

Last cycle achieved temperature AI R °C at recirculation return

Last cycle dwell time at setpoint AI R minutes

Last cycle timestamp DT R BACnet DateTime; cycle completion

Alarm – cycle failed BI R 1 = cycle did not reach setpoint

Alarm – sensor fault BI R NTC sensor open/short circuit

Alarm – valve actuator fault BI R Motor torque/position fault

C. Disinfection cycle log export: BMS shall periodically (daily) read the cycle log from the controller and store in the BMS database for Water Safety Plan documentation retention (recommended ≥ 5 years).

2.4 ACCESSORIES

A. Check valves: install at hot and cold inlets to the mixing valve to prevent cross-flow between supplies;

per EN 13959 type EA minimum.

B. Strainer: Y-strainer 500 μm mesh upstream of hot inlet to protect the thermostatic cartridge.

C. Isolation valves: full-bore ball valves on each hot, cold, and mixed-outlet connection to enable in-service cartridge replacement without system shutdown.

D. Pressure gauges and thermometers: test points / Schrader-type at each inlet and at outlet for verification during commissioning and routine inspection.

FAC ENGINEERING ROME 221119 – 6 May 23, 2026 | Rev. 0

E. Recirculation pump (DHW return): bronze or stainless body wet-rotor circulator; sized for the DHW recirculation flow per UNI 9182 (typical 10% of peak demand); rated for continuous duty at the disinfection setpoint temperature.

PART 3 – EXECUTION

3.1 EXAMINATION

A. Verify DHW generator (Section 235216 or as scheduled) is installed, pressure-tested, and capable of delivering hot water at the disinfection cycle setpoint.

B. Confirm DHW distribution and recirculation loop is complete and pressure-tested per Section 232113.

C. Confirm BMS infrastructure (controller, network) is operational for integration testing.

3.2 INSTALLATION

A. Mount the mixing valve in an accessible plant-room location with minimum 600 mm…