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GBS N80 110A Cambridge Swift Box (RSW)

GBS N80 110A Cambridge Swift Box (RSW)
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N80      Biodiversity Enhancement/Adaptation/Mitigation Systems

Draft Specification awaiting review (A07 BRM 261116)

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Manufacturer’s Illustrations:

N80/110A        Concealed concrete cantilevered swift nest box block:

cambridgeswiftboxwd

N80/110B        Concrete swift nest entrance brick stretcher

cambridgeswiftentrancewd

N80/110C        Concrete swift nest entrance brick header

Consider adding 3rd drawing

The brick header entrance brick is half the length of the stretcher (the half with the hole!)


GBE Guidance Notes:

In addition to choosing a competent, appropriate location and orientation for the bird box to suit the occupant and their nesting habits, also take into account structural issues as noted below:

Building competent locations:

Above the U value envelop:

  • above occupied rooms and their enveloping insulation,
  • in gable walls of building with storage attics not room in roof accommodation

In the absence of information on concrete mix strength and box configuration strength, it is recommended to avoid load-bearing situations in buildings.

Unsuitable load-bearing situations include:

  • Immediately below the eaves wall plate
  • Below a cut timber roof’s loadbearing purlin, loadbearing ridge or eaves wall plate

Suitable situations might include:

  • Non-loadbearing walls
  • Below a suitably designed and sized lintel
  • Where the project Structural Engineer permits
  • Where the Building Control Officer permits
  • In an unloaded gable wall of a trussed rafter roof

GBE Critique of System

N80/110D Concrete concealed bird nest box & exposed entrance brick system in gable wall:

For

  • Domestic or Non-domestic buildings
  • Tough, durable, low maintenance,
  • Bats and/or birds accommodated
  • Roosts can be positioned on any elevation unobtrusively
  • Potentially large capacity roots/nests
  • High thermal mass
  • Made for uninsulated cavity walls above the U value envelop

To be considered

  • Limited access for cleaning and removal of faeces and nesting materials from box

N80/110E       Concrete concealed bird nest box & exposed entrance brick system at eaves:

For

  • Domestic or Non-domestic buildings
  • Tough, durable, low maintenance,
  • Bats and/or birds accommodated
  • Roosts can be positioned on any elevation unobtrusively
  • Potentially large capacity roots/nests
  • High thermal mass
  • Made for uninsulated cavity walls above the U value envelop

To be considered

  • Creates thermal break through inner leaf insulating around box makes the installation less stable
  • Causes thermal bridge through cavity wall construction
  • Reduces U value locally in cavity wall construction with cavity insulation
  • Could be used in blockwork but does not coordinate with blockwork if insulated around box
  • Limited access for cleaning and removal of faeces and nesting materials from box

GBE Robust Specification

N80      BIODIVERSITY ENHANCEMENT/ADAPTATION/MITIGATION SYSTEMS

To be read with Preliminaries A10-A55/General Conditions

110A    CONCEALED CONCRETE CANTILEVERED SWIFT NEST BOX BLOCK:

  • Reference Drawing(s): Cambridge Swift Box Maxi Block PD000248
  • Type: Hollow block with open front and 2 No. cast in nest dishes in top and bottom (avoids error in installation)
  • Manufacturer: CJ WildBird Foods Ltd. The Rea, Upton Magna, Shrewsbury, Shropshire, SY4 4UR
  • T          0044 (0)1743 708022  F          0044 (0)1743 709505
  • W         www.birdfood.co.uk/pro            W         http://twitter.com/VivaraProUK
  • Contact: Martin George Wildlife Specialist      T          General: 0044 (0)1743 709555
  • E          martin.george@birdfood.co.uk
  • Product Reference: Cambridge Swift Nest Box
  • Endorsement: [GBE Listed]
  • LCA/EPD: Not Available
  • Density: 2400 kg/m3     Michael McNulty to calculate
  • Box weight: [___/___] kg
  • Work sizes: 440 x [200/250] x 215 (l x d x h) mm.
  • Wall thickness: 25 mm. (20 mm. in nest dishes)
  • Nest dishes: 5 x 90 mm. diameter
  • Material: Concrete OPC and primary virgin aggregates 1-2mm sand, 2 – 5mm coarse sand or 5mm + gravel
  • Finish: Fine textured finish
  • Colour: Grey

110B    CONCRETE SWIFT NEST ENTRANCE BRICK STRETCHER

  • Reference Drawing(s): Cambridge Swift Box Full face brick PD000361
  • Type: Solid Brick with cast in opening front to back through 102.5 mm
  • Manufacturer: CJ WildBird Foods Ltd. The Rea, Upton Magna, Shrewsbury, Shropshire, SY4 4UR
  • T          0044 (0)1743 708022  F          0044 (0)1743 709505
  • W         www.birdfood.co.uk/pro            W         http://twitter.com/VivaraProUK
  • Contact: Martin George Wildlife Specialist      T          General: 0044 (0)1743 709555
  • E          martin.george@birdfood.co.uk
  • Product Reference: Cambridge 1 Brick Swift Nest Entrance
  • Endorsement: GBE Listed
  • LCA/EPD: Not Available
  • Density: 2400 kg/m3     Michael McNulty to calculate
  • Brick weight: ____ kg
  • Work sizes: 215 x 102.5 x 65 (l x d x h) mm.
  • Wall thickness: 15-17 mm.
  • Material: Concrete OPC and primary virgin aggregates 1-2mm sand, 2 – 5mm coarse sand or 5mm + gravel
  • Finish: Fine textured finish
  • Colour: Grey

110C    CONCRETE SWIFT NEST ENTRANCE BRICK HEADER

  • Reference Drawing(s): Cambridge Swift box Half face Brick Reference number
  • Type: Solid Brick with cast in opening front to back through 102.5 mm (full width brick)
  • Manufacturer: CJ WildBird Foods Ltd. The Rea, Upton Magna, Shrewsbury, Shropshire, SY4 4UR
  • T          0044 (0)1743 708022  F          0044 (0)1743 709505
  • W         www.birdfood.co.uk/pro            W         http://twitter.com/VivaraProUK
  • Contact: Martin George Wildlife Specialist
  • E          martin.george@birdfood.co.uk            T          General: 0044 (0)1743 709555
  • Product Reference: Cambridge Half Brick Swift Nest Entrance
  • Endorsement: GBE Listed
  • LCA/EPD: Not Available
  • Density: 2400 kg/m3       Michael McNulty to calculate
  • Brick weight: ____ kg
  • Work sizes: 102 x 102.5 x 65 (l x d x h) mm half width brick
  • Wall thickness: 15-19 mm.
  • Material: Concrete OPC and primary virgin aggregates 1- 2mm sand, 2 – 5mm coarse sand or 5mm + gravel
  • Finish: Fine textured finish
  • Colour: [Grey/Duchy Red]

110D    CONCRETE CONCEALED BIRD NEST BOX & EXPOSED ENTRANCE BRICK SYSTEM IN GABLE WALL:

  • Reference Drawing(s): Cambridge Swift Box Midi
  • Location: Gable wall of trussed rafter pitched roof above insulated accommodation
  • Surround: Masonry Cavity wall, Brick outer leaf, Blockwork inner leaf
  • Cavity:
  • Total cavity: [150/200] mm.
  • Partial fill cavity Insulation thickness: [100/150] mm.
  • Residual cavity: 50 mm.
  • Orientation:
    • South-West for nursery roosts
    • North for winter hibernation roosts
  • Roof configuration:
    • Pitched trussed raftered roof gable walls at high level close to ridge
    • Pitched trussed raftered roof gable walls above external wall/internal ceiling insulation thickness
  • Manufacturer: CJ WildBird Foods Ltd. The Rea, Upton Magna, Shrewsbury, Shropshire, SY4 4UR
  • T          0044 (0)1743 708022  F          0044 (0)1743 709505
  • W         www.birdfood.co.uk/pro            W         http://twitter.com/VivaraProUK
  • Contact: Martin George Wildlife Specialist
  • E          martin.george@birdfood.co.uk            T          General: 0044 (0)1743 709555
  • Product Reference: Cambridge Swift Nest System
  • Consisting of:
  • Concealed concrete cantilevered swift nest box block to N80/110A
  • [Concrete Swift Nest Entrance Brick Stretcher to N80/110B
  • Concrete Swift Nest Entrance Brick Header to N80/110C]
  • Size: Whole brick and block sizes with no cutting and no waste
  • Preparation: ensure the top of the partial cavity wall insulation is protected by cavity tray DPC
  • Installation:
  • Build swift nest box into full thickness of inner leaf replacing a whole block,
  • Cantilever across the cavity to contact with the inner face of the outer leaf brickwork
  • Build swift nest entrance brick into [full/partial] thickness of outer leaf replacing brick [stretcher/header]
  • Mortar: Matching mortar to BS 5628
  • Coloured mortar: [Grey/colour to suit]
  • Joint Profile: [Flush/recessed/bucket handle]
  • Seal internal corner between outer face of swift nest box and inner face of outer brick leaf
  • Sealant: Material: Compatible with cavity tray DPC over box, setting type, [_____]
  • Sealant application: to all 4 faces of nest box
    • Clean both joint surfaces, all round
    • Apply compatible primer to adjacent surfaces
    • Apply sealant between two adjacent primed faces
    • Maintain convex sealant profile
  • Install Cavity Tray DPC above the box block and the entrance brick
  • Other requirements: Clean up upon completion remove any debris from top of cavity wall insulation beside and below.

110E    CONCRETE CONCEALED BIRD NEST BOX & EXPOSED ENTRANCE BRICK SYSTEM AT EAVES:

  • Reference Drawing(s): [________]
  • Location: Eaves wall of pitched roof
  • Surround: Masonary Cavity wall, Brick outer leaf, Blockwork inner leaf
  • Cavity:
  • Total cavity: [150/200] mm.
  • Partial fill cavity Insulation thickness: [100/150] mm.
  • Residual cavity: 50 mm.
  • Orientation:
    • South-West for nursery roosts
    • North for winter hibernation roosts
  • Roof configuration:
    • Pitched roof eaves walls at high level close to eaves, but not immediately below wall plate
    • Pitched roof eaves walls within external wall insulation thickness
  • Manufacturer: CJ WildBird Foods Ltd. The Rea, Upton Magna, Shrewsbury, Shropshire, SY4 4UR
  • T          0044 (0)1743 708022  F          0044 (0)1743 709505
  • W         www.birdfood.co.uk/pro            W         http://twitter.com/VivaraProUK
  • Contact: Martin George Wildlife Specialist
  • E          martin.george@birdfood.co.uk            T          General: 0044 (0)1743 709555
  • Product Reference: Cambridge Swift Nest System
  • Consisting of:
  • Concealed concrete cantilevered swift nest box block to N80/110A
  • [Concrete Swift Nest Entrance Brick Stretcher to N80/110B
  • Concrete Swift Nest Entrance Brick Header to N80/110C]
  • Other requirements:
  • Thermal insulation to maintain U value [behind/ and beside] box
  • Material: [Aerogel/Vacuum Insulated Panel (VIP)]
  • Thickness:
  • 30 mm to rear face
  • 30 mm to sides
  • Insulation sizes:
  • Back: 30 x 215 x 440 (t x h x l) mm
  • Sides: 2 No. 30 x 100 x 215 (t x d x h) mm
  • Top and Bottom: 2 No. 30 x 100 x 500 (t x d x w) mm
  • Insulation installation:
  • Allow for cutting blockwork to accommodate insulation, cut accurately and leave smooth surfaces
  • Ensure there are no sharp edges if using VIP insulation
  • Preparation:
  • Ensure the top of the partial cavity wall insulation is protected by cavity tray DPC
  •             Modify box depth (250 mm) to accommodate thermal insulation
  • Installation:
  • [Build swift nest box into full thickness of inner leaf replacing a whole block,
  • Build swift nest box into 70 mm thickness of inner leaf replacing a whole block
  • Incorporate 30 mm. insulation all round]
  • Cantilever across the cavity to contact with the inner face of the outer leaf brickwork
  • Build swift nest entrance brick into [full/partial] thickness of outer leaf replacing brick [stretcher/header]
  • Mortar: Matching mortar to BS 5628
  • Coloured mortar: [Grey/colour to suit]
  • Joint Profile: [Flush/recessed/bucket handle]
  • Seal internal corner between outer face of swift nest box and inner face of outer brick leaf
  • Sealant: Material: Compatible with cavity tray DPC over box, setting type, [_____]
  • Sealant application: to all 4 faces of nest box
    • Clean both joint surfaces, all round
    • Apply compatible primer to adjacent surfaces
    • Apply sealant between two adjacent primed faces
    • Maintain convex sealant profile
  • If the boxes are not protected by an eaves overhang then install Cavity Tray DPC above the box block and the entrance brick
  • Other requirements: Clean up upon completion remove any debris from top of cavity wall insulation.

End or work section N80


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© 1985-2016 GBE NGS ASWS BrianSpecMan


GBS Revisions

Revision No. Description Author Date
A00 For Preliminary Issue

Cut and pasted from literature and websites

Edited to specification format

Added Materials and Product critique

Issue to CW @ BCT

BRM 08/08/2009

14/08/2009

A01 Updated during review of Draft 9 BRM 09/10/2009
A02 Update Roofblock spec BRM 16/09/2012
A03 Save as Separate file for CJWBF only

Added 110A-110E CJ WildBird Food Cambridge System clauses

BRM 26/08/2016
A03 Issue to MG at CJWBF for comment BRM 26/08/2016
A04 %%% Updated with email and telephone feedback (250mm into drawing & spec) BRM 21/11/2016
A04 %%% Added Guidance notes re positioning re loadbearing capacity BRM 21/11/2016
A04 %%% Added Page 1 Header, Logo, editing notes and T&C at end BRM 21/11/2016
A04 %%% Moved Critiques to page with Guidance notes BRM 21/11/2016
A04 Issue to MG, MMcN, PS @ CJWBF BRM 21/11/2016
A05 Feedback from PS at CJWBF PS 25/11/2016
A06 %%% Incorporated comments and edited accordingly, some still outstanding

moved guidance and critique forwards;

Added illustrations

BRM 25/11/2016
A06 %%% 110A Next > Nest, WS title spelling adaptation, BRM 25/11/2016
A06 Issue to MG, MMcN, PS @ CJWBF BRM 25/11/2016
Pending:
A06 Concrete recipe to finalise

Concrete density or object weights to be calculated

Duchy Red to be confirmed

© Action for swift images; permission to be sought or replace?

BRM 25/11/2015

A07                      © Action for swift images; deleted for publication                                     BRM           26/11/2016


GBS Terms and Conditions



1 The ‘Information’

1.1       The ‘Green Building Specification’ (GBS) and ‘GBS Robust Specification’ are services provided by National Green Specification (NGS) and now distributed via Green Building Encyclopaedia (GBE) website.

1.2       This specification was prepared for NGS and ‘Green Building Specification’ (GBS) by Architectural Specification Writing Services (ASWS).

1.3       GBS GBE NGS and ASWS specification approach is based on >30 years and >£2415m PROJECT specification commissions, information gathered from seminars, workshops, published information. Etc.

1.4       The specification clauses in this document (the ‘Information’) are based on information assimilated from published or unpublished verbal and written information from manufacturers, etc.

1.5       The Information will continue to be developed and current files will be maintained on the GBE website at www.greenbuildingencyclopaedia.uk

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3 Disclaimer

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3.2       All users and others must verify the contents of the Information and ensure that its application is effective to communicate what is required by them and that the Information is fit for their intended use which has not been specified by NGS.

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______________________________________________________

Addenda

NBS compatibility


© GBE NGS ASWS BrianSpecMan aka Brian Murphy
21st November 2016 – 26th November 2016

GBS N80 110A Cambridge Swift Box (RSW)
See Also:


GBE Robust Specification

n80-cambridge-swiftboxspecclauses-a07brm261116 DOCX

n80-cambridge-swiftboxspecclauses-a07brm261116 PDF


Manufacturer’s Drawings

pd000248-cambridge-150-swift-nest-box-v2 PDF

pd000361-full-face-brick-v1-cambridge-drawing PDF


GBE Manufacturers

  • CJ WildBird Foods Ltd.

GBE Products:

  • Cambridge Swift Nest Box
  • Cambridge 1 Brick Swift Nest Entrance
  • Cambridge Half Brick Swift Nest Entrance

GBE Systems:

  • Cambridge Swift Nest System

GBE Suppliers

  • CJ WildBird Foods Ltd.

GBE Jargon Buster

  • Themes
  • Initials, Abbreviation Acronyms
  • Classification
    • N80 Biodiversity Enhancement/Adaptation/Mitigation Systems
  • Words & Phrases
    • Biodiversity
    • Enhancement
    • Adaptation
    • Mitigation

GBE Checklist

  • N80 Biodiversity Enhancement/Adaptation/Mitigation Systems

© GBE NGS ASWS BrianSpecMan aka Brian Murphy
21st November 2016 – 26th November 2016

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