NBS Architects Specification

124 Pages·2016·1.34 MB·English

Hykeham Community Hub
North Hykeham Town Council

HCH-BBA-Z0-ZZ-SP-A-00001 Revision P0

NBS Architect’s Specification
HCH-BBA-Z0-ZZ-SP-A-00001 Revision P0
HCH-BBA-Z0-ZZ-SP-A-00001 Revision P0
Hykeham Community Hub
Hykeham Community Hub

NBS Architect’s Specification

REVISIONS RECORD

Rev Date By Section Description

P0 25.01.16 JR All Tender Issue
Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

Issue P0 25.01.16 Page 2
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NBS Architect’s Specification

CONTENTS LIST PAGE(S)

Revisions record 02
Contents 03
Using this specification 04-05

Work Sections

F10 Brick/ Block walling
F30 Accessories/ Sundry items for brick/ block/ stone walling
F31 Precast concrete sills/ lintels/ copings/ features

H31 Metal profiled/ flat sheet cladding/ covering/ siding

J40 Flexible sheet tanking/ damp proofing

K10 Plasterboard dry linings/ Partitions/ Ceilings
K13 Rigid sheet fine linings and paneling
K21 Wood strip/ board/ fine flooring/ linings
K32 Panel cubicles/ duct and wall linings/ screens

L10 Windows/ Rooflights/ Screens/ Louvres
L20 Doors/ Shutters/ Hatches
L40 General glazing

M10 Cement based levelling/ wearing screeds
M20 Plastered/ Rendered/ Roughcast coatings
M40 Stone/ Concrete/ Quarry/ Ceramic tiling/ Mosaic
M50 Rubber/ Plastics/ Cork/ Lino/ Carpet tiling/ sheeting
M60 Painting/ Clear finishing

N10 General fixtures/ furnishings/ equipment
N11 Domestic kitchen fittings, furnishings and equipment
N13 Sanitary appliances and fittings
N14 General signage systems
N17 Portable fire fighting systems

P10 Sundry insulation/ proofing work
P12 Fire stopping systems
P20 Unframed isolated trims/ skirtings/ sundry items
P21 Ironmongery

Q22 Asphalt roads/ pavings
Q25 Slab/ Brick/ Sett/ Cobble pavings
Q50 Site/ Street furniture/ Equipment

R10 Rainwater drainage systems
R11 Above ground foul drainage systems

End of contents
Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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NBS Architect’s Specification

Using this specification
Proprietary trade names are specified in this document and these shall not be changed without the Architect’s
approval in writing. The required compliant tender shall include for all specified proprietary items including all
associated items from the same manufacturer necessary to satisfactorily complete the works in accordance with
the manufacturer’s recommendations.

A supplementary tender may be submitted in addition to the compliant tender, and this may include proposed
equivalent alternatives or value engineering opportunities clearly identified. The Architect reserves the absolute
right to insist on the specified item(s) in order to maintain the integrity of the Architect’s Warranty.

The term ‘equivalent approved’ shall mean components, products, assemblies or services, which are of true
equivalent standard in quality, appearance, value and performance as assessed by the Architect.

Tender Information
All architectural tender documents shall be read in conjunction with this specification, which is the controlling
document. Any variation between documents shall be referred to the Architect for resolution.

Regulations and standards
All construction shall comply with the following (non-exhaustive) list of statutory documents, applicable version to
be current at the date of construction.

- Town and Country Planning Act
- Local Authority Byelaws
- The Building Regulations
- European Standards, British Standards and Codes of Practice
- Construction (Design and Management) Regulations
- Equality Act
- Control of Substances Hazardous to Health (COSHH)
- Health and Safety at Work Act
- The Workplace (Health, Safety and Welfare) Regulations
- Fire Precautions Acts
- The CIBSE Guides
- Institute of Electrical Engineers Regulations for electrical installations
- Environment Act
- Water Act
- Clean Air Act
- The Gas Safety (Installations and Use) Regulations
- Housing Grants, Construction and Regeneration Act
- Rights of Light Act
- Party Walls etc Act
- Copyright (Designs and Patents) Act

Deleterious materials
All materials used shall comply with the publication ‘Good practice in the selection of construction materials’
published by the British Property Federation, (current edition).

Health and Safety
The proposed construction works have been designed and shall be constructed to ensure that all potential
construction and use risks have been eliminated, or reduced. Where appropriate, health and safety information is
included in this specification and shown on drawings, subject to specialist input where indicated.

Structural Engineer’s Drawings
Please read both the Structural Engineer’s and Bond Bryan Architects drawings together. Do not send the
Structural Engineers drawings without the Bond Bryan Architects drawings to �a steel fabricator.
Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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NBS Architect’s Specification

Calculations
The contractor shall carry out all design calculations (including computer simulations) necessary to verify
compliance of the specified construction to meet statutory regulations. The contractor shall be responsible for
design compliance with statutory regulations.

Drawings and calculations
This specification requires drawings and/or calculations to be submitted for comment/acceptance prior to
ordering/fabrication/production. Allow 10 working days from submission to Architect for this. Allow 5 working
days from submission to Architect for each subsequent revision.

Samples
This specification requires samples to be submitted for comment/acceptance prior to placing purchase orders.
Allow 10 working days from delivery to Architect for this. See individual clauses for sample requirements.

Insulation
All insulation (building, services, acoustic) shall be A+ (or minimum A) rated in compliance with BRE Green Guide
to Specification. Additionally, all insulation associated with the building services shall be sourced from
manufacturers who operate a certified Environmental Management System relating to the insulation manufacturing
process.

U Values
The project is working to the following U-Values. Reference should be made to the Engineer’s documentation
with reference to Part L compliance, since extensive use of renewable technology is to be used. The ‘carbon’
footprint of this building is incredibly low and the project will use U-value standards as listed below:

Walls: 0.24 W/(m2K)
Floors: 0.10 W/(m2K)
Roofs: 0.10 W/(m2K)
Windows/Rooflights: 1.4 W/(m2K)
Air Permeability: 5.0 m3/(h.m2) at 50 Pa

Sustainable timbers
All timber used during construction shall be supplied from FSC (Forest Stewardship Council) certified sources
bearing the FSC label to ensure that the audit trail can be verified as originating from forests or plantations
responsibly managed. The FSC has a rigorous chain of custody tracking timber from forest to end-user. The
chain-of-custody records are mandatory for this project. A list of approved sources and merchants is available
from TRADA (Timber Research and Development Association).

End of Using this specification

Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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NBS Architect’s Specification

F10 BRICK/ BLOCK WALLING

To be read with Preliminaries/ General conditions.

TYPES OF WALLING

110 CLAY FACING BRICKWORK
- Bricks: IBSTOCK BRICK LIMITED
- Light Grey A5147A (215mm x 102.5mm x 65mm. )
- Minimum compressive strength 40N/mm2
- Typical maximum water absorption ≤ 6%
- Durability/frost resistance – F2
- Active soluble salt content – S2
- For setting out, refer to drawings
- Mortar: Cemex
- Mortar colour: Black Light
- Mix 1:1:6 cement/lime/sand (Group 3)
- Bond: Stretcher
- Joints: 10mm, profile 5mm recessed
- Specials: N/A

250 CONCRETE FACING BLOCKWORK
- The concrete blocks to be left fair as shown on the wall types plan shall be Premier Facing Masonry
produced by Lignacite Ltd, tel [phone] or other equal approved.
- Where there is a fairfaced requirement to the 200mm thick internal leaf of an external wall
construction (comprising 2 x100mm collar jointed blocks as shown on the engineers drawings), only
the visible inner skin is required to be fairfaced. The second (outer) skin of the internal leaf may use
a standard concrete block as clause 260.
- Category 1 Masonry Units.
- Minimum mean compressive strength of: 10.4 N/mm2
- Form: Solid
- Face size: 440 x 215 mm
- Thickness: 100 mm / 140mm (refer to Structural Engineer’s drawings)
- Colour: Oyster
- Finish: Natural
- Average density: 1950 kg/m3
- Thermal Resistance: 0.078 m2 K/W
- Mortar mix: Class 3
- Mortar colour: Cemex Black Light
- Joint profile: Bucket Handle
- Bond: Stretcher
- Sound Insulation: 43 RwdB
- Sound Absorption at 500 Hz: 0.10
- Fire Resistance (load bearing): 2 Hrs
- Coursing Blocks: To match as required

260 CONCRETE STANDARD COMMON BLOCKWORK
- Manufacturer: Contractor’s choice
- Category 1 Masonry Units.
- Minimum mean compressive strength of: 7.3 N/mm2
- Form: Solid
- Face size: 440 x 215 mm
- Thickness: 100 mm
Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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NBS Architect’s Specification

- Colour: Medium Grey
- Average density: 1450 kg/m³
- Thermal Resistance: 0.111 m² K/W
- Mortar mix: Class M4
- Joint profile: Bucket handle,
- Bond: (stack, stretcher)
- Sound Insulation: 47 RwdB
- Fire Resistance (load bearing): 2 Hrs
- Coursing Blocks: To match as required

WORKMANSHIP GENERALLY

430 CONDITIONING OF CLAY AND CALCIUM SILICATE BRICKS AND CLAY BLOCKS
- Bricks and blocks delivered warm from manufacturing process: Do not use until cold.
- Absorbent bricks in warm weather: Wet to reduce suction. Do not soak.

440 CONDITIONING OF CONCRETE BRICKS/ BLOCKS
- Autoclaved concrete bricks/ blocks delivered warm from manufacturing process: Do not use.
- Age of nonautoclaved concrete bricks/ blocks: Do not use until at least four weeks old.
- Avoidance of suction in concrete bricks/ blocks: Do not wet.
- Use of water retaining mortar admixture: Submit details.

460 MORTAR GROUPS
- Mix proportions: For a specified group select a mix design from the following:
- Group 1:
1:0–0.25:3 (Portland cement:lime:sand with or without air entraining additive).
1:3 (Portland cement:sand and air entraining additive).
- Group 2:
1:0.5:4–5 (Portland cement:lime:sand with or without air entraining additive).
1:3 (masonry cement:sand containing Portland cement and lime in approximate ratio 1:1, and an air
entraining additive).
1:2.5–3.5 (masonry cement:sand containing Portland cement and inorganic materials other than lime
and air entraining additive).
1:3–4 (Portland cement:sand and air entraining additive.)
- Group 3:
1:1:5–6 (Portland cement:lime:sand with or without air entraining additive).
1:3.5–4 (masonry cement:sand containing Portland cement and lime in approximate ratio 1:1, and an
air entraining additive).
1:4–5 (masonry cement:sand containing Portland cement and inorganic materials other than lime and
air entraining additive).
1:5–6 (Portland cement:sand and air entraining additive).
- Group 4:
1:2:8–9 (Portland cement:lime:sand with or without air entraining additive).
1:4.5 (masonry cement:sand containing Portland cement and lime in approximate ratio 1:1, and an air
entraining additive).
1:5.5–6.5 (masonry cement:sand containing Portland cement and inorganic materials other than lime
and air entraining additive).
1:7–8 (Portland cement:sand and air entraining additive).
- Batching: Mix proportions by volume.
- Mortar type: Continuous throughout any one type of masonry work.

Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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NBS Architect’s Specification

500 LAYING GENERALLY
- Mortar joints: Fill vertical joints. Lay bricks, solid and cellular blocks on a full bed.
- AAC block thin mortar adhesive and gypsum block adhesive joints: Fill vertical joints. Lay blocks on a full
bed.
- Clay block joints:
- Thin layer mortar: Lay blocks on a full bed.
- Interlocking perpends: Butted.
- Bond where not specified: Half lap stretcher.
- Vertical joints in brick and concrete block facework: Even widths. Plumb at every fifth cross joint.

520 ACCURACY
- Courses: Level and true to line.
- Faces, angles and features: Plumb.
- Permissible deviations:
- Position in plan of any point in relation to the specified building reference line and/ or point at the
same level ± 10 mm.
- Straightness in any 5 m length ± 5 mm.
- Verticality up to 3 m height ± 10 mm.
- Verticality up to 7 m height ± 14 mm.
- Overall thickness of walls ± 10 mm.
- Level of bed joints up to 5 m (brick masonry) ± 11 mm.
- Level of bed joints up to 5 m (block masonry) ± 13 mm.

545 LEVELLING OF SEPARATE LEAVES
- Locations for equal levelling of cavity wall leaves: As follows:
- Every course containing vertical twist type ties or other rigid ties.
- Every third tie course for double triangle/ butterfly ties.
- Courses in which lintels are to be bedded.

560 COURSING BRICKWORK
- Gauge: Four brick courses including bed joints to 300 mm.

580 LAYING FROGGED BRICKS
- Single frogged bricks: Frog uppermost.
- Double frogged bricks: Larger frog uppermost.
- Frog cavity: Fill with mortar.

585 LAYING CELLULAR BRICKS
- Orientation: Cavities downward.

595 LINTELS
- Bearing: Ensure full length masonry units occur immediately under lintel ends.

615 BRICKWORK TO RECEIVE ASPHALT DPC
- Substrate: Mortar bed finished flush, smooth and level.

635 JOINTING
- Profile: Consistent in appearance.

645 ACCESSIBLE JOINTS NOT EXPOSED TO VIEW
- Jointing: Struck flush as work proceeds.

690 ADVERSE WEATHER
- General: Do not use frozen materials or lay on frozen surfaces.
- Air temperature requirements: Do not lay bricks/ blocks:
Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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NBS Architect’s Specification

- In cement gauged mortars when at or below 3°C and falling or unless it is at least 1°C and rising.
- In hydraulic lime:sand mortars when at or below 5°C and falling or below 3°C and rising.
- In thin joint mortar glue when outside the limits set by the mortar manufacturer.
- Temperature of walling during curing: Above freezing until hardened.
- Newly erected walling: Protect at all times from:
- Rain and snow.
- Drying out too rapidly in hot conditions and in drying winds.

ADDITIONAL REQUIREMENTS FOR FACEWORK

710 THE TERM FACEWORK
- Definition: Applicable in this specification to brick/ block walling finished fair.
- Painted facework: The only requirement to be waived is that relating to colour.

730 BRICK/ CONCRETE BLOCK SAMPLES
- General: Before placing orders with suppliers submit for approval of appearance labelled samples of the
following: ALL specified bricks/ blocks whose surface will be visible once works are complete, including
Paint Grade Blocks.
- Selection of samples: Representative of the range in variation of appearance.

740 FINISHED MASONRY WORK REFERENCE PANELS
- General: Before proceeding to construct the following walling types, construct panels as specified. Give
notice when panels are dry.
- Selection of masonry units: F10/110, 250
- Panel types:
- Walling type: Dwaf wall
Location: To be agreed on site with the Architect and the Local Planning Authority. Panels should be
located in an area of good natural light and if possible where they can be viewed in conjunction with
the finished work. A viewing distance of at least 3m should be provided.
Size: 900mm high x 890mm wide subject to agreement with the Local Planning Authority.
Other requirements: Panel to be representative of typical cavity wall construction, including window
opening, jamb, cill and head incorporating insulated cavity closers, insulated steel lintel, proprietary plastic
weepholes, cavity trays and DPC. Cavity wall to include cavity wall insulation and cavity wall ties.
Panel is to be approved by Architect, Local Planning Authority and Client or Client’s Representative
prior to commencement of masonry works on site and is to remain on site for the duration of the
project as an indicator of the minimum acceptable quality of masonry workmanship required.

750 COLOUR CONSISTENCY OF MASONRY UNITS
- Colour range: Submit proposals of methods taken to ensure that units are of consistent and even
appearance within deliveries.
- Conformity: Check each delivery for consistency of appearance with previous deliveries and with
approved reference panels; do not use if variation is excessive.
- Finished work: Free from patches, horizontal stripes and racking back marks.

760 APPEARANCE
- Brick/ block selection: Do not use units with damaged faces or arrises.
- Cut masonry units: Where cut faces or edges are exposed cut with table masonry saw.
- Quality control: Lay masonry units to match relevant reference panels.
- Setting out: To produce satisfactory junctions and joints with built-in elements and components.
- Coursing: Evenly spaced using gauge rods.
- Lifts: Complete in one operation.
- Methods of protecting facework: Submit proposals.

Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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NBS Architect’s Specification

780 GROUND LEVEL
- Commencement of facework: Not less than 150 mm below finished level of adjoining ground or external
works level.

790 PUTLOG SCAFFOLDING
- Use: Not permitted in facework.

830 CLEANLINESS
- Facework: Keep clean.
- Mortar on facework: Allow to dry before removing with stiff bristled brush.
- Removal of marks and stains: Rubbing not permitted.

End of specification F10
Bond Bryan Architects The Church Studio Springvale Road Sheffield S10 1LP T 0114 266 2040 F 0114 268 7021 E [email protected]

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