Questions_Answer_FA558720Q0026 Additional_2020.10.19_ver4.docx

FA558720Q0026 Hoods & Ducts Additional Questions after Site Visit

1. Can you confirm when we will receive photos/dims of were scaffolding is required at Alconbury bowling facility and both FRFD will be forwarded for consideration?

Answer:

a) Asset 4/RAF Alconbury – Bowling Center – Building 616: See the document below:

b) Asset 24-25/RAF Fairford – Community Center – Building: The height from ground level to the top of the building is 5m. Please see below photographs for reference.

2. Can you provide approx. dimensions of the ALCO Stukeley Club Kitchen where the whole ceiling is a vent?

Answer - Please see the insert documents below:

3. RFMD New Dorm 1 & RFMD pizza prep K3 mention site-specific requirement but do not detail exactly what is needed?

Answer - New Dorm 1 is a domestic sealed-unit hood served by a cylindrical duct approximately 2 metres long and 4” in diameter. Only access is from outside at a height of approx. 2 metres therefore site-specific requirements would be a ladder for access, screwdriver to remove cover and rods to clean

Pizza Prep K3 has limited access due to Ansul suppression system pipework impeding access to the hood header. The Ansul pipework with the clip part on it needs to be removed away from the spigot hole. This makes it a lot easier to move around, and removes the possibility of breaking the pipe or clip if squeezing past was attempted, even with the system deactivated.

Coordination with the COR is required to arrange assistance from the fire suppression engineers (sub-contracted to the base facility maintenance contractor) in removing pipework pre-cleaning and reinstating post-cleaning. Historically this has been coordinated with fusible link replacement also.

4. MDF 436 ceiling tile removal:

As the PWS states in 1.1.1.7. ‘the contractor is fully responsible for any specific requirements to fulfil complete cleaning of the ventilation system such as setting up scaffolding, removing metal ceiling tiles or ballast, unique systems, abseil or other cleaning methods, isolating fan etc.” The ceiling is not really safe to be removed and reinstalled. Removing this ceiling could result in the structural integrity being compromised. If this happens, who will be responsible?

Answer: Specifically MDF 436 Ceiling:

If removing the ceiling it is suggested it be conducted by a specialist ceiling-removal company such as Breckland Suspended Ceilings Ltd. who have previously been sub-contracted for this task which I assume you will need to add to your quote.

It’s true that the ceiling is getting tired and the facility is looking at that among other jobs when planned improvement works go ahead early in the new year, however I assume that the onus for any compromised structural integrity would be on the installation company, indirectly if not directly.

The ceiling has been removed historically as this is how cleaning was conducted, however as long as cleaning is to the required standard and conducted in a safe manner that is acceptable to the customer, the method used is up to the contractor

General Perspective:

Inform and specify why it is not safe the Contracting Officer Representative (COR) in advance of the cleaning, COR should request facility manager to ensure if the system is safe by proper technical support before cleaning will be fulfilled. As the PWS states in tab 1.1.1.2. “Document and report to the Contracting Officer Representative (COR) any area of the hood and duct grease extraction system not accessible for proper cleaning as well as any damaged, defective, or leaking ducts discovered, noting system impairments and recommendations within 5 business days of cleaning.”

If the contractor haven’t informed the COR about the risk, then as the PWS states in tab 3.2. “DAMAGE TO U.S. GOVERNMENT PROPERTY. The contractor will report all damages of UK/US RAF Base property to the COR before 0800 hours the next business day. The contractor will be responsible for reimbursing the UK/US RAF Base no later than 30 calendar days of receipt of claim for all costs associated with damages to UK/US RAF Base property in the performance of services in this contract.”

5. Previous Experience Do I sent the Past experience Questionnaires to the CORS?

Answer- You can send them to COR’s, Previous CO’s or authorized personnel (i.e. for Non-USAF contracts).

6. Technical Capability Quote.

This doesn’t include anything that verifies the capability such as the certification and supporting documentation. Are we just saying that for example; ‘we can carry out scaffolding works’?

Answer - We would like to see as much as certification, supporting document, previous performance reports, production capability, quality assurance capability, transportation, financial capability for the work need to perform as it is describe in PWS.

7. Corrective Actions:

What sort of corrective actions should we allow for? I’m assuming it is pertaining to the installation of Access panels on the Ductwork?

Answer - Corrective actions will be performed to fixed an unsatisfactory performance. In such cases, contractor and COR, if needed Contracting Officer will determine the corrective action. A corrective action will defer from case to case. It can be repeating a cleaning or installing of access panels on the ductwork. Differences of opinion between the COR and the contractor that cannot be resolved by the COR should be referred to the Contracting Officer.

stukeleyinn-rafalconbury.pdf

STUKELEY INN - RAF

ALCONBURY

Ductwork

Tuesday, 13 October 2020

5 Items Identified

RAF Alconbury 423d Civil Engineer Squadron

ITEM ITEM 1 - KITCHEN1 - KITCHEN

Assigned To Ductwork Dimensions

Area = 9.50 x 8.60m (81.70 m2)

ITEM ITEM 2 - KITCHEN2 - KITCHEN

Assigned To Note

As above

ITEM ITEM 3 - KITCHEN3 - KITCHEN

Assigned To Ductwork

Double skinned panels

ITEM ITEM 4 - DUCTWORK ACCESS4 - DUCTWORK ACCESS

Assigned To Access To Above

ITEM ITEM 5 - DUCTWORK ACCESS5 - DUCTWORK ACCESS

Assigned To Access To Void

Confined space regulations aplly image5.emf

Britannia Heydal.pdf

Fully demountable ventilated ceiling system

Britannia Kitchen Ventilation Ltd Units 1-3, Warwick House Business Park, Southam, Warwickshire CV47 2PT

Tel: 01926 811300 Fax: 01926 811484 E-mail: sales@kitchen-ventilation.co.uk Web: www.kitchen-ventilation.co.uk

Our policy is one of continuous improvement and we reserve the right to change specifications at any time and without notice.

05/2007

Kitchen ventilation design can sometimes be confusing. Should you use conventional extract canopies or a ventilated ceiling and, if so, should it be a plenum ceiling or cassette type?

Take advantage of our CIBSE approved CPD seminar on kitchen ventilation design, at your offices. The seminar is free of charge and covers the latest regulations and innovations.

Subjects covered include:

Current standards

Gas interlocks BS 6173

The induction principal

Canopy design rules

UV filtration systems

Volume calculations

Recirculation canopies

Ventilated ceilings

Fire suppression systems and much more...

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VENTILATED CEILING

The fully demountable ventilated ceiling system that combines fire resistance with a clean line of sight Heydal is a fully integrated suspended ceiling system from Britannia that is designed for ventilating large commercial kitchens.

The system incorporates fully demountable exhaust air, supply air and blank modules, complete with collection troughs and integral light fittings.

All visible components are manufactured from stainless steel and are supported from a primary and secondary grid system.

Advantages of the Heydal system:

• Complies with Food Safety Regulations 1995, HVCA standard DW172 and MOD Defence Estates Specifications

• Provides in excess of one hour fire resistance

• Lower resistance to airflow, reducing plant and running costs

• Provides a clean line of sight across the kitchen, where conventional canopies may prove unsightly

• Fully demountable and easy to clean - Britannia also offer full cleaning & maintenance contracts

• Easily reconfigured to allow for modified cooking equipment layouts

• Designed to reduce the load on building structure when compared to other ventilated ceilings

• Can be powder coated to suit architectural requirements

Principal of operation

The void above the ceiling is divided into exhaust and supply air plenums by leak-tight metal vertical partitions.

Grease filtration is achieved through a twin shell perforated extract module.

Grease emitted from the cooking equipment precipitates out of the airstream as it passes through the modules.

The exhaust module shape ensures that the separated discharge cannot drip back onto cooking surfaces and is retained within the shells and the surrounding collection troughs.

Supply modules are perforated single skinned panels through which fresh air is introduced into the kitchen.

Blank modules are not perforated; these are used to complete the ceiling after all supply, exhaust and lighting modules have been fitted. They also provide a means for locating items such as smoke detectors.

Collection troughs are channels located between the modules, which retain extracted grease between cleaning cycles.

Lighting

Lighting is provided by means of integrated 500 x 500 mm sealed light units designed to achieve 500 lux on the working surface below.

Size and weight

The system is based on 500mm square modules allowing for total flexibility of layout. The nominal average weight of the system of 15 kg/m2.

Appearance

The ceiling is available in satin finish stainless steel as standard. Alternatively the ceiling components can be polyester powder coated to a colour of the clients choice.

Cleaning & maintenance

Only the exhaust modules and collection troughs require regular cleaning. Frequency of cleaning depends on the type, frequency and density of cooking.

All modules and troughs are easily removed, without specialist tools and are suitable for cleaning in a conventional commercial dishwasher.

Britannia provide cleaning and maintenance contracts on any completed ceiling to ensure the system is always in excellent condition.

Services Distribution Units

Housing the mechanical and electrical services that run from the ceiling to the cooking equipment can sometimes be difficult.

Britannia supply services distribution units to house the services in custom designed stainless steel enclosures.

Components of Heydal Ceiling

1. Primary support channels

2. Secondary support channels

3. Support head

4. Collection trough

5. Supply air module (single shell)

6. Blank module (single shell)

7. Extract module (twin shell)

8. Stainless steel infill to wall

9. Perimeter angle trim

10. Partitioning - separates exhaust and supply air zones image1.emf bowlingalley-B616-rafalconbury.pdf

BOWLING ALLEY - B616 - RAF

ALCONBURY

Scaffolding Works

Tuesday, 20 October 2020

4 Items Identified

RAF Alconbury 423d Civil Engineer Squadron

ITEM ITEM 1 - SCAFFOLDING WORKS1 - SCAFFOLDING WORKS

Assigned To Hood And Duct Clean

Dimension (Approximate)

Height: 2nd lift @ 6.00m

ITEM ITEM 2 - SCAFFOLDING WORKS2 - SCAFFOLDING WORKS

Assigned To Ductwork Access

Scaffolding required to access ductwork

ITEM ITEM 3 - SCAFFOLDING WORKS3 - SCAFFOLDING WORKS

Assigned To Ductwork Vents

Scaffolding required to access ductwork

ITEM ITEM 4 - PREVIOUS SCAFFOLDING4 - PREVIOUS SCAFFOLDING

Assigned To Hood And Duct Clean

Image dictates previous scaffolding works erected to facilitate hood and duct clean image2.jpg image3.jpg image4.emf