linings/sheathing/dry partitioning - microsoft · 2016-11-07 · k10 a initial costing k10...

KLinings/Sheathing/Dry partitioning

160720 AEC extension City of Bristol College

1 4 Nov 2016

K10A Initial Costing

K10

Plasterboard dry linings/ partitions/ ceilings

No.

Section Revision History

Purpose

A Initial Costing 4th Nov 2016

Clauses amended in Revision A

This is the first revision stamp for this section. For all future revision stamps, details of all clauses amended at that revision will be included here.


2 4 Nov 2016

K10 Plasterboard dry linings/ partitions/ ceilings

PLASTERBOARD DRYLININGS PARTITIONS AND CEILINGS

To be read with preliminaried/General conditions

TYPES OF DRY LINING

127A METAL STUD PARTITION(S): TYPE 1 - 40DB - 2.5M - 3.4M HIGH- Drawing reference(s): 110346/A/P125 - P126 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12

6JT Tel: 08705 456123 Fax: 08705 456356. Product reference: GypWall ROBUST. Nominal thickness (excluding finishes): 97mm.

- Performance criteria: Fire resistance to BS 476: Part 22: 30 minutes. Sound insulation: Rw 40dB. Partition duty to BS 5234: Parts 1 and 2: Severe. Maximum height based on limiting deflection of L/240 at 200Pa: 9000mm.

- Timber sole plate: 38mm (nominal) x 72mm, if required. - Framing:

Studs: Gypframe 70mm S 590C Studs at 600mm centres, and at wall abutments. Floor channel: Gypframe 72 C 60. Head channel: Gypframe 72 C 60, unless determined otherwise by deflection. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board linings, or as an alternative to fixing T for single layer board linings.

- Head condition: Fixed to structural soffit. Deflection allowance: ±15mm, unless determined otherwise by structural engineer.

- Lining: Single layer 15mm Duraline , sheet width 1200mm, to both sides of framing. Fixing: As clause 591A. Screws: 50mm Gyproc Drywall.

- Cavity insulation:N/A - Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A - Accessories: _________ - Other requirements: 146 I 80 Stud @ 600 centres with 1 x 15mm Wallboard and 1 x

15mm Duraline to both sides. Walls between 5m and 9000m.



3 4 Nov 2016


127B METAL STUD PARTITION(S): TYPE 2 - 45DB- Drawing reference(s): 110346/A/106 - 107 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12

6JT Tel: 08705 456123 Fax: 08705 456356. Product reference: GypWall ROBUST. Nominal thickness (excluding finishes): 124 mm.

- Performance criteria: Fire resistance to BS 476: Part 22: 30 minutes. Sound insulation: Rw 45dB. Partition duty to BS 5234: Parts 1 and 2: Severe. Maximum height based on limiting deflection of L/240 at 200Pa: 4900mm and 5400mm.


Studs: Gypframe 92mm AS 50 Studs at 600mm centres (4900mm high) or 400mm centres (5400mm high), and at wall abutments. Floor channel: Gypframe 94 DC 60. Head channel: Gypframe 94 DC 60, unless determined otherwise by deflection. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board linings, or as an alternative to fixing T for single layer board linings.


- Lining: 15mm Gyproc DuraLine, sheet width 1200mm, to both sides of framing. Fixing: As clause 591A. Screws: 50mm Gyproc Drywall.

- Cavity insulation: None Required - Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A - Accessories: 12mm plywood patch required to fix white boards / notice boards - Other requirements: Please note when using sheet wood material as board layer

ensure the product is dimensionally stable and environmentally conditioned.


4 4 Nov 2016


127C METAL STUD PARTITON(S): TYPE 2 - 45DB WALLS WTH WHITEBOARDS- Drawing reference(s): 110346/A/106 - 107 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12




Studs: Gypframe 90mm S 50 C Studs at 300mm centres, and at wall abutments. Floor channel: Gypframe 90 DC 60. Head channel: Gypframe 90 DC 60, unless determined otherwise by deflection. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board linings, or as an alternative to fixing T for single layer board linings.


- Lining: Inner 12mm plywood with outer layer 15mm Gyproc DuraLine, sheet width 1200mm, to both sides of framing. Fixing: As clause 591A. Screws: 50mm Gyproc Drywall.

- Cavity insulation: 25mm Isover Insulation - Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A - Accessories: _________ - Other requirements: Please note when using sheet wood material as board layer



5 4 Nov 2016


127D METAL STUD PARTITION(S): TYPE 3 - 50dB - Drawing reference(s): 110346/A/106 - 107 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12




Studs: Gypframe 92mm S 50 at 600mm centres, and at wall abutments. Floor channel: Gypframe 94 DC 60. Head channel: Gypframe 94 DC 60, unless determined otherwise by deflection. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board linings, or as an alternative to fixing T for single layer board linings.


- Lining: Inner 12.5mm Wallboard with outer layer 15mm Gyproc DuraLine, sheet width 1200mm, to both sides of framing. Fixing: As clause 591A. Screws: 50mm Gyproc Drywall.

- Cavity insulation: 25mm Isover Insulation - Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A - Accessories: - Other requirements: Inner layer of 12.5mm wallboard required to achieve height,

not need for acoustics.


6 4 Nov 2016


127E METAL STUD PARTITION(S): TYPE 4 - 55DB - GENERALLY- Drawing reference(s):110346/A/106 - 107 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12




Studs: Gypframe 146mm S 50 at 600mm centres, and at wall abutments. Floor channel: Gypframe 148 DC 60. Head channel: Gypframe 148 DC 60, unless determined otherwise by deflection. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board linings, or as an alternative to fixing T for single layer board linings.


- Lining: Inner layer 12.5mm Soundbloc, 15mm Gyproc DuraLine, sheet width 1200mm, to both sides of framing. Fixing: As clause 591A. Screws: 25mm Gyproc Drywall.

- Cavity insulation: 25mm Isover Insulation. - Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A - Accessories: _________ - Other requirements: _________


7 4 Nov 2016


127F METAL STUD PARTITION(S): TYPE 4 - 55DB - WALLS WITH WHITE BOARDS- Drawing reference(s): 110346/A/106 - 107 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12




Studs: Gypframe 146mm S 50 at 600mm centres, and at wall abutments. Floor channel: Gypframe FE 148 DC 60. Head channel: Gypframe FE 148 DC 60, unless determined otherwise by deflection. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board linings, or as an alternative to fixing T for single layer board linings.


- Lining: Inner 12mm plywood with outer layer 15mm Gyproc DuraLine, sheet width 1200mm, to both sides of framing. Fixing: As clause 591A. Screws: 50mm Gyproc Drywall.

- Cavity insulation: 50mm Isover Insulation. - Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A - Accessories: _________ - Other requirements: Please note when using sheet wood material as board layer



8 4 Nov 2016


127G METAL STUD PARTITION(S): TYPE 5 - 38DB MOISTURE RESISTANT- Drawing reference(s): 110346/A/106 - 107 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12

6JT Tel: 08705 456123 Fax: 08705 456356. Product reference: GypWall ROBUST. Nominal thickness (excluding finishes): 124mm + ply as required.

- Performance criteria: Fire resistance to BS 476: Part 22: 30 minutes. Sound insulation: Rw 38dB. Partition duty to BS 5234: Parts 1 and 2: Medium. Maximum height based on limiting deflection of L/240 at 200Pa: 4500mm.


Studs: Gypframe 92mm S 50 C Studs at 600mm centres, and at wall abutments. Floor channel: Gypframe 94 DC 60. Head channel: Gypframe 94 DC 60, unless determined otherwise by deflection. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board linings, or as an alternative to fixing T for single layer board linings.


- Lining: Inner 12.mm PlyWood with outer layer 15mm Gyproc Moisture Resistant Plasterboard, sheet width 1200mm, to both sides of framing. Fixing: As clause 591A. Screws: 50mm Gyproc Drywall.

- Cavity insulation: None Required - Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A - Accessories: _________ - Other requirements: Please note when using sheet wood material as board layer


135 For Block work partitons refer to Section F10/255


9 4 Nov 2016


140A WALL LINING SYSTEM (METAL FRAMING): [INTERNAL FACES OF EXTERNAL WALLS AND EXISTING STRUCTURES]" Manufacturer: British Gypsum Ltd, East Leake, Loughborough, Leicestershire LE12

6JT Tel: 0870 545 6123 Fax: 0870 545 6356 Email: [email protected]

Web: www.british-gypsum.com OR SIMILAR APPROVED. -Product reference: British Gypsum GypLyner™ UNIVERSAL System.. Wall: Metsec framing

Cavity between wall and back of lining: Contractor's choice to suit location and performance of lining

- Framing centres: 600 mm as recommended by manufacturer. - Bracket centres (maximum): 800 mm.

Insulation: Not required. - Thickness: 1 layers 15mm Duraline plasterboard

Linings: As Clauses 401 - 415 . " Access units: see M&E distribution. " Finishing: Seamless jointing. - Primer/ Sealer: As recommended by the board manufacturer for

vapour control. - Accessories: Metal beads/ stops recommended by board

manufacturer . " Other requirements: All joints to be sealed for air tightness in

accordance with BREEAM

145A WALL LINING SYSTEM TO BLOCKWORK- Drawing reference(s): 110346/A/P125-P126 - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12

6JT Tel: 08705 456123 Fax: 08705 456356. • Substrate: Dense Concrete Block - 140mm • Adhesive: Direct bonding - Dot and Dab • Linings: Plasterboard • Finishings: Taped / skimmed

- Primer / Sealer: To manufacturers details • Accessories:


10 4 Nov 2016


226A SUSPENDED CEILING ON METAL FRAMING- Drawing reference(s): 110346/108-109 - Manufacturer: British Gypsum, East Leake - Loughborough, Leicestershire LE12 6JT - Tel: 08705 456123 Fax: 08705 456356. - Product reference: CasoLine MF. - Structural soffit: Concrete floor. - Suspension system: Hangers: Gypframe MF8 or GA1 hangers with MF12 cleats

secured to soffit using fixings recommended by suspended ceiling contractor. - Primary grid: Gypframe MF7 channels at 1200mm centres, suspended from

hangers at 1200mm centres. Secondary grid: Gypframe MF5 sections at 450mm centres, fixed to primary grid with Gypframe MF9 clips or Gyproc Wafer Head Jack-Point Screws.

- Perimeters: Gypframe MF6 channel. - Lining: 12.5mm Gyproc WallBoard. - Fixing: As clause 591A. - Screws: 25mm Gyproc Drywall. - Insulation: Not required. - Acoustic sealant: As clause 516A, if required. - Finishing: Taped seamless finish as clause 671A or skim coat plaster as clause

681A. - Services fittings: Install layout drawing to be provided - Accessories: M&E fittings - Other requirements: _________

266 FRAMELESS CASING TO STEEL COLUMNS: ALTERNATIVE TO M61- Drawing reference(s): n/a - Structural member(s): Section factor A/V (Hp/A) up to 260. - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12

6JT Tel: 08705 456123 Fax: 08705 456356. Product reference: FireCase. Type: 3 sided casing as clause 586C or 4 sided casing as clause 586E.

- Fire resistance of complete encasement assembly to BS 476: Part 21: 60 minutes. - Lining: 15mm Glasroc F FIRECASE.

Screws: 40mm Glasroc F FIRECASE Screws for fixing to GA1 angles; 40mm Glasroc F FIRECASE Screws or Glasroc Staples for board to board fixings.

- Finishing: Seamless finish as clause 676A or skim coat plaster as clause 681A. - Accessories: _________ - Other requirements: _________

GENERALLY/PREPARATION

305 COMPLIANCE WITH PERFORMANCE REQUIREMENTS- Provide UKAS/NAMAS accredited laboratory test/assessment report(s) for the

following: Sound performance Fire Performance

- All materials, components and details used must be in accordance with the test/assessment report(s). If discrepancies arise, obtain instructions.


11 4 Nov 2016


345 ADDITIONAL SUPPORTS FOR PARTITION HEADSProvide or ensure provision of accurately positioned and securely fixed framing to receive partition heads running parallel with, but offset from main structural supports.

355 ADDITIONAL SUPPORTS FOR FIXTURES AND FITTINGSProvide or ensure provision of accurately positioned and securely fixed framing to support fixtures, fittings and services. After fixing boards, mark positions of framing for following trades.

365 ADDITIONAL SUPPORTS FOR BOARD EDGES AND PERIMETERS:Provide or ensure provision of additional framing, accurately positioned and securely fixed, to give full support to board edges and lining perimeters in accordance with board manufacturer's recommendations.

375 NEW WET LAID BASES Provide or ensure provision of a continuous strip of bituminous felt DPC or other approved material under partitions/freestanding wall linings, cut to the full width of the partition/lining.

385 SERVICE PENETRATIONSThe dry lining contractor must liaise with the Main Contractor and other contractors to ensure that fire resistance and other specified performance requirements are not impaired by service penetrations. In particular: - Form framed openings accurately for grouped services, ducts, etc. allowing for

associated fire barriers. - Provide insulation backings to recessed electrical outlets and switches as

recommended by the plasterboard manufacturer.

395 CONTROL SAMPLE(S)Complete area(s) of finished work in approved locations as follows and obtain approval of appearance before proceeding: To be agreed - 3 Rooms

405 PLASTERBOARD GENERALLYTo BS 1230: Part 1, types 1 to 5 with exposed surface and edge profiles suitable to receive the specified finish. FIXING/FINISHING


12 4 Nov 2016


415 DRY LINING GENERALLY- Fixing, jointing and finishing materials and accessories, where not specified

otherwise, to be as recommended by the board manufacturer. - Handle and store materials in accordance with BS 8212, section 5. Do not use

damaged boards. - Use operatives properly trained for dry lining work and who have attended a

recognised training scheme. - Fix boards only in areas which have been made weathertight. Prevent frost

damage. - Cut boards neatly and accurately without damage to core or tearing of paper

facing. Keep cut edges to a minimum and position at internal angles wherever possible. Mask with bound edges of adjacent boards at external corners.

- Fix boards securely and firmly to suitably prepared and accurately levelled backgrounds. Set heads of fastenings in a depression; do not break paper or gypsum core. Finish neatly to give flush, smooth, flat surfaces free from bowing and abrupt changes of level.

425 CEILINGSFix boards to ceilings before walls and partitions. Fix boards with bound edges at right angles to supports and with ends staggered in adjacent rows.

445 METAL STUD FRAMING- Install using components, accessories and methods recommended by the board

manufacturer. - Set out floor/head channels and perimeter studs to give a framework which is

accurately aligned with a true vertical plane. Fix securely at all perimeters at not more than 600mm centres.

- Position studs at equal centres to suit specified linings, maintaining sequence across openings. Provide additional studs as necessary to ensure support to all vertical edges of boards.

- Accurately form openings to receive doorsets using Gypframe metal studs and suitable timber framing or Gypframe metal studs sleeved with Gypframe channel as necessary to achieve the strength grade requirements of the framing assembly and adequately support the weight of the door.

467 BRITISH GYPSUM METAL STUD PARTITIONSFix Gypframe 94 and 148mm wide floor/head channels, and Gypframe 92 and 146mm perimeter abutment studs using two rows of staggered fixings, each at 600mm centres.

495 MINERAL WOOL INSULATION TO METAL STUD PARTITIONS/LININGS- Fit securely with closely butted joints, leaving no gaps. Unless the insulation is of a

self supporting slab type fitted between studs, fix at head of frame using timber battens or proprietary clips.


13 4 Nov 2016


500 MINERAL WOOL INSULATION ACROSS METAL SUSPENDED CEILING FRAMING- Use widest practical widths of insulation. Fit securely with closely butted joints,

leaving no gaps. - Cut and fit neatly around any electrical fittings, etc. Do not cover electrical

cables (unless they have been sized accordingly).

505 INSTALLING MINERAL WOOL INSULATIONFitting insulation: Closely butted joints and no gaps. Use fasteners to prevent slumping or displacement. Services: - Electrical cables overlaid by insulation: Sized accordingly. - Ceilings: Cut insulation around electrical fittings, etc.

510 SEALING GAPS AND AIR PATHS: Location of sealant: To perimeter abutments and around openings.

- Pressurized shafts and ducts: At board-to-board and board-to-metal frame junctions. Application: To clean, dry and dust free surfaces as a continuous bead with no gaps.

- Gaps greater than 6 mm between floor and underside of plasterboard: After sealing, fill with jointing compoun

516 ACOUSTIC SEALANT- Manufacturer and reference: British Gypsum, Gyproc Sealant. - Location: At junctions with adjoining structure, and at other airpaths. - Apply as a continuous bead to clean, dry, dust-free surfaces, leaving no gaps. - After application of sealant, bulk fill gaps between floor and underside of

plasterboard using Gyproc joint compound.

526 CAVITY BARRIERS (SINGLE FRAME PARTITION)- Maintain continuity of fire barrier formed by perimeter channels using short

lengths of close fitting plasterboard screwed into the web across joints in channel sections and around service holes, except where:

- The partitions abut plasterboard linings or masonry. K10 British Gypsum 08 October 2009 Page 12 0197-SP-001

- Timber sole or head plates are fitted. - Form continuous vertical barriers using lengths of close fitting plasterboard

screwed into the web of individual studs or channels.


14 4 Nov 2016


526A CAVITY BARRIERS (TWIN FRAME PARTITION)- Maintain continuity of fire barrier formed by perimeter channels using short

lengths of close fitting Gyproc plasterboard screwed into the web across joints in channel sections and around service holes, except where:

- The partitions abut plasterboard linings or masonry. - Timber sole or head plates are fitted. - Form continuous vertical barriers using 12.5mm Gyproc plasterboard cut to a

good fit and screw-fixed to each of a pair of studs, and spanning the whole cavity width.

545 CAVITY BARRIERS WITHIN CEILING VOIDS- Fire resistance to BS 476:Part 20: Integrity/insulation (minutes) 30/60min

dependent on fire strategy plan Material: Mineral wool Fixing: contractor's choice

- Unless shown otherwise, install barriers to subdivide the ceiling void into areas not exceeding ___ m square.

- Fix securely at perimeters and joints, ensuring permanent stability and continuity with no gaps, to provide a complete barrier to smoke and flame.

555 FIRE STOPPING Seal any gaps at junctions of linings and cavity barriers with perimeter abutments, service penetrations, etc. using tightly packed stone mineral wool or fire resisting / intumescent sealant, to prevent penetration of smoke and flame.

560 JOINTS BETWEEN BOARDS- Gyproc plasterboards: Lightly butt boards together. - Square edged Gyproc plasterboards to be finished with Artex textured

compound: 3mm gap.

- Glasroc F fibre reinforced gypsum boards: Lightly butt boards together. K10 British Gypsum 08 October 2009 Page 13 0197-SP-001

565 VERTICAL JOINTS- Centre joints on studs. For partitions, ensure that joints on opposite sides of studs

are staggered. - For two layer boarding, stagger joints between layers


15 4 Nov 2016


570 HORIZONTAL JOINTS- Horizontal joints will not be permitted in surfaces exposed to view except where

the height of partition/lining exceeds the maximum available length of board. Agree positions of joints where not specified.

- For two layer boarding, stagger joints between layers by at least 600mm. If previous layer of plank plasterboard, stagger joints between layers by 300mm.

- Ensure that edges of boards are supported by additional framing. For two layer boarding framing must support the outer layer.

572 CEILING JOINTSFor multi-layer boarding, stagger joints between layers by at least 600mm.

591 FIXING PLASTERBOARD TO METAL SUPPORTS- Partitions/linings/casings: - Face layer: Fix securely to all supports at maximum 300mm centres (reduced to

200mm at external angles where recommended by the board manufacturer). - Previous layer of plank plasterboard: Install with long edges at right angles to

studs, and fix securely to each stud using two screws. - Other previous layers: Fix securely to supports around the perimeter of each

board at maximum 300mm centres. - Ceilings: Fix securely to all supports at maximum 230mm centres (reduced to

150mm at board ends and at lining perimeters where recommended by the board manufacturer).

- Fix working from the centre of each board. Position screws not less than 13mm from cut edges and 10mm from bound edges of boards. Set heads in a depression; do not break paper or gypsum core.

591A FIXING PLASTERBOARD TO METAL SUPPORTS- Partitions/linings/casings: - Face layer: Fix securely to all supports at maximum 300mm centres (reduced to

200mm at external angles where recommended by the board manufacturer). - Previous layer of plank plasterboard: Install with long edges at right angles to

studs, and fix securely to each stud using two screws. - Other previous layers: Fix securely to supports around the perimeter of each

board at maximum 300mm centres. - Ceilings: Fix securely to all supports at maximum 230mm centres (reduced to

150mm at board ends and at lining perimeters where recommended by the board manufacturer).

- Fix working from the centre of each board. Position screws not less than 13mm from cut edges and 10mm from bound edges of boards. Set heads in a depression; do not break paper or gypsum core. Finishing: to be skim coat plaster as Clause 681A.


16 4 Nov 2016


671 TAPED SEAMLESS FINISH TO PLASTERBOARD- Manufacturer: British Gypsum.

Joint compound: One or more of the following Gyproc products: - Easi-Fill - Easi-Fill 45 - Joint Filler - Joint Cement - Ready Mix Joint Cement - ProMix LITE Joint Cement.

Joints/gaps/internal corners: Gyproc Joint Tape. External corners: Gyproc Drywall Metal Angle Bead or Gyproc No-Coat Ultraflex 325. Primer/sealer: Two coats Gyproc Drywall Sealer where vapour control required (will provide vapour resistance only and does not meet performance requirements for moisture resistant grade boards as defined in BS/EN520, type H1) and one coat Gyproc Drywall Primer elsewhere. Alternatively, one coat Gyproc Drywall Sealer for simple steam stripping of wall coverings (except for vinyl or other low permeability wall coverings) at a later date.

- Lightly sand cut edges of boards to remove paper burrs. - Fill all joints, gaps and internal angles with joint compound and cover with

continuous lengths of tape, fully bedded. Reinforce external angles, stop ends, etc. with the specified bead/corner tape.

- When set, cover with joint compound, feathered out to give a flush, smooth, seamless surface.

- Spot nail/screw depressions with joint compound to give a flush surface. - Fill minor indents. After joint, angle and spotting treatments have dried, lightly

sand to remove any minor imperfections.

- Apply specified primer/sealer to give a continuous consistent texture to surface of boards.


17 4 Nov 2016

676 SEAMLESS FINISH TO GLASROC F FIBRE REINFORCED GYPSUM BOARD- Manufacturer: British Gypsum.

Joint compound: Gyproc Joint Cement. External corners: Gyproc Drywall Metal Angle Bead or Gyproc No-Coat Ultraflex 325.

- Reinforce external angles, etc. with the specified bead/corner tape. - Apply Gyproc Joint Cement to the joint and bed in Gyproc Joint Tape. Allow to

dry and lightly sand to remove any high spots. Gyproc Joint Tape should be used in internal angle joints. Trowel apply a second coat of Gyproc Joint Cement and feather out to about 200mm width on each side of the joint. Allow to dry and lightly sand.

- Spot nail/screw/staple depressions with two coats of joint compound to give a flush surface.

- Fill minor indents with a single coat of joint compound to give a flush surface. - After joint, angle and spotting treatments have dried, lightly sand to remove any

minor imperfections.

695 BEADS/STOPS GENERALLY- Cut neatly using mitres at return angles. Fix securely using longest possible

lengths, plumb, square and true to line and level, ensuring full contact of wings with background.

- After joint compounds/plasters have been applied, remove surplus material while still wet from surfaces of beads which are exposed to view.



18 4 Nov 2016


K32

Panel cubicles/ duct and wall linings/ screens

No.


Purpose





19 4 Nov 2016

K32 Panel cubicles/ duct and wall linings/ screens

To be read with Preliminaries/ General conditions.

120A PANEL CUBICLES TO MALE & FEMALE SHOWERS • - Drawing reference(s): 160720

- Manufacturer and reference: Contractors Choice and approved - Product:Contractor Choice and approved - Board/panel type: High Density Solid Grade laminate (SGL) with decorative face each side. - Thickness: 13mm nominal. - Edge treatment: All edges radiused and polished (black). - Depth: 2000mm maximum recommended from face of back wall or rear ducting. - Floor Clearance: 100mm. - Overall height: 2100mm overall from FFL. - Colour/Finish – Panels/Doors: TBC. - Headrail: Powder coated aluminium (match fittings) with curtain track insert at opening. - Floor channel: Powder coated aluminium (match fittings). - Pedestals: Adjustable, to partitions and wide pilasters. - Cleats or Channel for wall/pilaster fixing: with concealed fixings. - Colour/Finish – Fittings: insert fittings option here. - Optional Accessories:Toilet Roll Holder (NBS Clause N13/462); Venesta Coat Hook (NBS Clause N13/429); Document M 2004 Compliant grab rails and door pulls (NBS Clause N13/436).

120B PANEL CUBICLES TO MALE & FEMALE WC's • Manufacturer: Contractors Choicen and approved

- Product reference: Contractors Choice and approved • - Drawing reference(s): 160720

- 1950mm overall height from FFL including 150mm floor clearance - 1800mm maximum recommended depth from face of back wall or rear ducting. - Panels/Doors:

Core material: 19mm thick high performance melamine faced 730kg/m3 grade moisture resistant chipboard. Colour/Finish: TBCEdge treatment: All visable edges sealed with matching 1mm PVC.

- Headrails/Legs: Dark grey powder coated aluminium headrail, adjustable dark grey polycarbonate support legs. Ironmongery/Accessories: Universal aluminium safety hinge powder coated dark grey. Polycarbonate indicator bolts with emergency release facility and keep, all with concealed fixings. Polycarbonate cleats with anti-tamper fixings, polycarbonate toilet roll holder and coat hook, all powder coated dark grey. Note: Please refer to NBS Clause N13/436 for the Document M May 2004 compliant cubicle grab rails & door handles.



20 4 Nov 2016

210 SAMPLES• General: Before placing orders submit representative samples of the following: Pan

el and door material and colours. • Delivered materials/ products: To match samples.

210A SAMPLES AND BREEAM CERTIFICATION • General: Before placing orders submit representative samples of the following: Pan

el and door material and colours. • Delivered materials/ products: To match samples.

Provide BREEAM verification as clause Z135

250 INSTALLATION• Programming: Do not install cubicles or duct/ wall panels before building is

weathertight, wet trades have finished their work, wall and floor finishes are complete, and the building is well dried out.

• Accuracy: Set out to ensure frames and/ or panels and doors are plumb, level and accurately aligned.

• Modifications: Do not cut, plane or sand prefinished components except where shown on drawings.

• Fixing: Secure components using methods and fasteners recommended by the cubicle/ panel manufacturer. Prevent pulling away, bowing or other distortions to frames, panels and doors.

• Moisture and thermal movement: Make adequate allowance for future movement.



21 4 Nov 2016


K40

Demountable suspended ceilings

No.


Purpose





22 4 Nov 2016

K40 Demountable suspended ceilings

To be read with Preliminaries/General conditions.

TYPES OF CEILING SYSTEM

105 SUSPENDED CEILING SYSTEM Class A Acoustic - Teaching Areas • Standard: To BS EN 13964. • Ceiling:

- Type: grid. - Module: 600 x 600 all areas. - Soffit height above finished floor level: 3675mm____.

• Grid: - Form: Interlocking. - Exposure: Exposed.

• Access: Identified infill units demountable . • Suspension system: Required. • Perimeter trim: Required. • Accessories: None. • Integrated services fittings: Hangers and housings for linear luminaires. • Other requirements: tbc.



23 4 Nov 2016


105A SUSPENDED CEILING SYSTEM Class A Acoustic - Teaching Areas • -Drawing reference(s): 160720

-Structural soffit(s): PC Concrete slabs -Ceiling system manufacturer: Contractor Choice and / or approved -Product reference:Contractors Choice and / or approved -Grid type: 24mm exposed grid -Main runners shall be positioned at 1200 mm centres and securely fastened to the plasterboard ceiling using straightened 2 mm diameter galvanised mild steel wire positioned at 1200 mm maximum centres. - All main runner joints shall be staggered, and there should be a hanger

positioned within 150mm of the fire expansion point, with the maximum suspension from the perimeter not to exceed 450 mm.

- 1200 mm cross tees shall be connected to and span the main runners at 600 mm centres and shall be sub-divided by 600 mm cross tees forming a module of 600 mm x 1200 mm. -Hangers: Straightened 2mm galvanised mild steel wire. -Protective finish to suspension systems: Galvanized. -Perimeter trims: Angle trim 32mm x 19mm securely fastened to vertical wall surface at 450 mm maximum centres. -Membrane material(s): New generation bio-soluble mineral wool tile with white painted fleece surface. -Fire performance: Class 0 in accordance with Building Regulations. -Sound absorption: aw = 0.90, ISO Class A -Sound attenuation: Dncw of 26 dB. -Humidity resistance: Up to 95% R.H. -Light reflection: Up to 80%. Size(s): 600 x 600mm x 19mm thick. -Finish/colour: Smooth fleece surface painted white similar to RAL 9010 -Insulation: N/A -Services fittings: according to M&E drawings -Accessories: N/A -Other requirements: suspended ceiling tiles to comply with BS 13964:2004 Formaldehyde E1 (BS EN 717-1:2004), no asbestos -The VOC content of the relevant specified product types must comply with the standards specified above.


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105B SUSPENDED CEILING SYSTEM Corridors • -Drawing reference(s): 160720

-Structural soffit(s): PC Concrete slabs -Ceiling system manufacturer: Contractors Choice -Product reference: Conrtactors Choice -Grid type: 24mm exposed grid. -Main runners shall be positioned at 1200 mm centres and securely fastened to the plasterboard ceiling using straightened 2 mm diameter galvanised mild steel wire positioned at 1200 mm maximum centres. - All main runner joints shall be staggered, and there should be a hanger


- 1200 mm cross tees shall be connected to and span the main runners at 600 mm centres and shall be sub-divided by 600 mm cross tees forming a module of 600 mm x 1200 mm. -Hangers: Straightened 2mm galvanised mild steel wire. -Protective finish to suspension systems: Galvanized. -Perimeter trims: Angle trim 32mm x 19mm securely fastened to vertical wall surface at 450 mm maximum centres. Refer to manufacturers perimeter details. -Membrane material(s): New generation bio-soluble mineral wool tile with white painted fleece surface. . -Fire performance: Class 0 in accordance with Building Regulations. -Sound absorption: aw = 0.90, ISO Class A -Sound attenuation: Dncw of 26 dB. -Humidity resistance: Up to 95% R.H. -Light reflection: Up to 80%. Size(s): 600 x 600mm x 19mm thick. -Finish/colour: Smooth fleece surface painted white similar to RAL 9010 -Insulation: N/A -Services fittings: according to M&E drawings -Accessories: N/A -Other requirements: suspended ceiling tiles to comply with BS 13964:2004 Formaldehyde E1 (BS EN 717-1:2004), no asbestos -The VOC content of the relevant specified product types must comply with the standards specified above.


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105C SUSPENDED CEILING SYSTEM WC / Showers • -Drawing reference(s): 160720

-Structural soffit(s): PC Concrete slabs -Ceiling system manufacturer: Contractors Choice and or approved -Product reference: Contractors Choice and or approved -Grid type: 24mm exposed grid. -Main runners shall be positioned at 1200 mm centres and securely fastened to the plasterboard ceiling using straightened 2 mm diameter galvanised mild steel wire positioned at 1200 mm maximum centres. - All main runner joints shall be staggered, and there should be a hanger


- 1200 mm cross tees shall be connected to and span the main runners at 600 mm centres and shall be sub-divided by 600 mm cross tees forming a module of 600 mm x 1200 mm. -Hangers: Straightened 2mm galvanised mild steel wire. -Protective finish to suspension systems: Galvanized. -Perimeter trims: Angle trim 32mm x 19mm securely fastened to vertical wall surface at 450 mm maximum centres. Refer to manufacturers perimeter details. -Membrane material(s): New generation bio-soluble mineral wool tile with white painted fleece surface. -Fire performance: Class 0 in accordance with Building Regulations. -Sound absorption: aw = 0.90, ISO Class A -Sound attenuation: Dncw of 26 dB. -Humidity resistance: Up to 95% R.H. -Light reflection: Up to 80%. Size(s): 600 x 600mm x 19mm thick. -Finish/colour: Smooth fleece surface painted white similar to RAL 9010 -Insulation: N/A -Services fittings: according to M&E drawings -Accessories: N/A -Other requirements: suspended ceiling tiles to comply with BS 13964:2004 Formaldehyde E1 (BS EN 717-1:2004), no asbestos -The VOC content of the relevant specified product types must comply with the standards specified above.

GENERAL/ PERFORMANCE

205 COMPLIANCE WITH PERFORMANCE REQUIREMENTS• Testing/ assessment: Submit UKAS accredited laboratory reports for the following: Fir

e performance. • Materials, components and details: Use those used in the test and identified in the

assessment reports. If discrepancies arise, give notice.

210 ENVIRONMENT• Environmental classification to BS EN 13964: Class A.


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215 ENVIRONMENTAL CONDITIONS- Areas for storage and installation must be clean, dry, well ventilated and free from excessive and/or rapid variations of temperature and humidity. - Do not install membrane material until the building is weathertight and wet trades have finished their work. Before, during and after installing,

ensure that temperature and humidity are maintained at levels similar to those which will prevail after building is occupied. - Notwithstanding the above, delivery of materials and installation of the suspended ceiling will be taken as joint acceptance by the Main Contractor and Ceiling Subcontractor of the suitability of the environmental conditions.

230 ACOUSTIC PERFORMANCE Class A• Airborne sound insulation:

- Weighted suspended ceiling normalized level difference, Dn,c,w (minimum) to BS EN ISO 717-1: .

- Weighted sound reduction index, Rw (minimum) to BS EN ISO 717-1: . - Weighted standardized level difference, DnT,w (minimum) to BS EN ISO 717-1: .

• Sound absorption: - Sound absorption coefficient, alpha S, (minimum) to BS EN ISO 354: .

COMPONENTS

245 STANDARDS• Components: To BS EN 10346.

- Aluminium sheet, strip and plate: To BS EN 485. - Aluminium bars, tubes and sections: To relevant parts of BS EN 515, BS EN 573, BS

EN 755 and BS EN 12020.

EXECUTION

305 SETTING OUT• General: Completed ceiling should present, over the whole of its surface exposed

to the room below, a continuous and even surface, jointed (where applicable) at regular intervals.

• Infill and access units, integrated services: Fitted correctly and aligned. • Edge/ perimeter infill units size (minimum): Half standard width or length. • Corner infill units size (minimum): Half standard width and length. • Grid: Position to suit infill unit sizes. Allow for permitted deviations from nominal sizes

of infill unit. • Infill joints and exposed suspension members: Straight, aligned and parallel to walls,

unless specified otherwise. • Suitability of construction: Give notice where building elements and features to

which the ceiling systems relate are not square, straight or level.

310 BRACING• General: Secure, with additional bracing and stiffening to give a stable ceiling

system resistant to design loads and pressures.


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315 PROTECTION• Loading: Do not apply loads for which the suspension system is not designed. • Ceiling materials: When necessary, remove and replace correctly using special

tools and clean gloves, etc. as appropriate.

325 INSTALLING HANGERS• Wire hangers: Straighten and tension before use. • Installation: Install vertical or near vertical, without bends or kinks. Do not allow

hangers to press against fittings, services, or insulation covering ducts/ pipes. • Obstructions: Where obstructions prevent vertical installation, either brace

diagonal hangers against lateral movement, or hang ceiling system on an appropriate rigid sub-grid bridging across obstructions and supported to prevent lateral movement.

• Extra hangers: Provide as necessary to carry additional loads. • Fixing:

- Wire hangers: Tie securely at top with tight bends to loops to prevent vertical movement.

- Angle/ strap hangers: Do not use rivets for top fixing. • Spacings: to suit system .

385 UPSTANDS AND BULKHEADS• Vertical ceiling systems: Support and brace to provide alignment and stability. • High upstands: Provide support at base of upstand.

390 OPENINGS IN CEILING MATERIALS• General: Neat and accurate. To suit sizes and edge details of fittings. Do not distort

ceiling system.

395 INTEGRATED SERVICES• General: Position services accurately, support adequately. Align and level in

relation to the ceiling and suspension system. Do not diminish performance of ceiling system.

• Small fittings: Support with rigid backing boards or other suitable means. Do not damage or distort the ceiling. - Surface spread of flame rating of additional supporting material: Not less than

ceiling material. • Services outlets:

- Supported by ceiling system: Provide additional hangers. - Independently supported: Provide flanges to support ceiling system.


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401 CEILING MOUNTED LUMINAIRES • Support: By Ceiiing System.

- Independently supported luminaires: Suspension adjusted to line and level of ceiling.

- Ceiling supported luminaires: Modifications and/ or extra support required: To each luminaire.

• Surface mounted luminaires: Units installed so that in event of a fire the designed grid expansion provision is not affected.

• Modular fluorescent recessed luminaires: Compatible with ceiling module. Extension boxes must not foul ceiling system.

• Recessed rows of luminaires: Provide flanges for support of grid and infill units, unless mounted above grid flanges. Retain in position with lateral restraint.

• Fire protecting/ resisting ceiling systems: Luminaires must not diminish protection integrity of ceiling system.

• Access: Provide access for maintenance of luminaires.

406 TRUNKING• Recessed trunking: Provide flanges for support of grid and infill units, unless

mounted above grid flanges. Retain in position with lateral restraint.

411 MECHANICAL SERVICES • Fan coil units:

- Inlet/ Outlet grilles: Trim ceiling grid and infill units to suit. - Space beneath: Sufficient for ceiling system components. - Suspension and connections: Permit accurate setting out and levelling of fan coil

units. • Air grilles and diffusers:

- Setting out: Accurate and level. - Linear air diffusers: Retain in place with lateral restraint. Provide flanges for

support of grid and infill units. - Grille/ Diffuser ceiling joints: Provide smudge rings and edge seals.

• Smoke detectors and PA speakers: - Ceiling infill units: Scribe and trim to suit. - Independent suspension: Required. - Flexible connections: Required.

• Sprinkler heads: Carefully set out and level.

415 INSTALLING INSULATION• Fitting: Fit accurately and firmly with butted joints and no gaps. • Insulation within individual infill units: Fit closely. Secure to prevent displacement

when infill units are installed or subsequently lifted. - Dustproof sleeving: Reseal, if cut.

• Width: Lay insulation in the widest practical widths to suit grid member spacings. • Services: Do not cover electrical cables that have not been sized accordingly. Cut

insulation carefully around electrical fittings, etc. Do not lay insulation over luminaires.

• Sloping and vertical areas of ceiling system: Fasten insulation, to prevent displacement.


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421 CEILING SYSTEMS INTENDED FOR FIRE PROTECTION• Junctions of ceiling systems with perimeter abutments and service penetrations:

Seal gaps with tightly packed mineral wool or intumescent sealant to prevent penetration of smoke and flame.

• Ceiling system/ wall junctions: Maintain protective value of ceiling system. - Fixings and grounds: Noncombustible. - Metal trim: Provide for thermal expansion.

• Access and access panels: Maintain continuity of fire protection.

425 INSTALLING CAVITY FIRE BARRIERS • Maximum ceiling void dimension in any direction: 10 meters. • Fixing: Secure barrier at head and base using proprietary angle support system and

Fix angle support system to timber framework with No. 10 woodscrews at 450 mm centres. - General: Fix barriers securely to channels or angles at abutments to building

structure. - At perimeters and joints: Provide permanent stability and continuity with no gaps

to form a complete barrier to smoke and flame. • Joints: Form to preserve integrity in fire. • Service penetrations: Cut barriers neatly to accommodate services. Fit fire resistant

sleeves around flexible materials. Fill gaps around services to fire barrier manufacturer's recommendations to maintain barrier integrity. Adequately support services passing through the barrier.

• Ceiling systems intended for fire protection: Do not impair fire resisting performance of ceiling system.

• Ceiling systems not intended for fire protection: Do not mechanically interlink barriers with ceiling system.

430 AIR PLENUM BARRIERS- Material: rigid or semirigid non porous sheets with smooth nondusting surfaces having the same fire spread rating as that required for membrane materials exposed within the void. - Fix securely at perimeters and joints, using methods recommended by the barrier manufacturer to ensure permanent stability. All edges and joints to be effectively sealed to prevent air leakages.


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500 ELECTRICAL CONTINUITY AND EARTH BONDING • Substantial conductive parts of the ceiling system: Electrically continuous and fully

earth bonded to carry prospective earth fault currents. - Standard: To BS 7671.

• Sequence: Complete earth bonding as soon as possible after completion of each independent area of suspension system.

• Testing: After completion of the ceiling system, associated services and fittings, test conductive parts of suspension system required to carry earth fault current, or used as bonding connections. Give notice before testing. - Electrical continuity: Measure from various distant conductive points of ceiling

system and to earth bar in distribution board serving the area. - Test current: Sufficient to indicate probable electrical performance under fault

conditions. - Test instrument: Type providing a pulse of about 25 A at safe voltage for safe

duration, and indicating resistance in ranges 0-2 ohms and 0-20 ohms. - Resistance of measuring conductors: Deduce from test instrument readings. - Test readings: Record and certify. Add results to resistance of other parts of the

path forming the earth fault loop.

COMPLETION

505A TOOLS• Provide two sets of: All access tools/instructions

One set to be for the use of subcontractors requiring access to the void and the other for handing over to the College at Practical Completion.

520 USER INSTRUCTIONS• Contents: Include the following:

- Correct methods for removing and replacing infill units and other components. - Cleaning methods and materials. - Recommendations for redecoration. - Ceiling systems intended for fire protection: Limitations placed on subsequent

alterations and maintenance procedures, to ensure that their fire performance is not impaired.

- Maximum number, position and value of point loads that can be applied to ceiling system after installation.

530A SPARES• Provide the following and hand over to the Employer at Practical Completion:

- Spare panels of each type



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