190 5 ShaftWall - british-gypsum.com/media/Files/British-Gypsum/SITE... · Gypframe MF5 Ceiling Section ... Gyproc and Glasroc board products Gyproc FireLine Thickness 12.5, ... Installation

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Shaft and duct encasement system

ShaftWall provides a lightweight,non-loadbearing fire-resistant structure to protect elements withinthe service cores of modern fast-track developments. It is alsoused to protect all forms of shaftsand ducts in conventional buildings.The system provides a protectivestructure which can be incorporatedat an early stage of the buildingbefore the building envelope issealed. The system can also be builthorizontally to provide a fire-ratedmembrane. StairWall is a derivativeof the ShaftWall system which is used to protect stairwells.

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Technical support: T 0844 800 1991 F 0844 561 8816 E [email protected]

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Key facts

● Lightweight, fast-track construction

● Provides fire protective shaft enclosures,

stairwells and horizontal membranes

● Shaft enclosures built from one side only

● Horizontal membranes built entirely from below

● Can be installed prior to making the building

envelope weather-tight

● Minimal wall thickness from 80mm

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Gypframe MF5 Ceiling Section

Gypframe Floor & Ceiling Channel

Gypframe 'I' Stud, Gypframe Retaining Channel

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Take-offquantities1

as required

as required

as required

as required

Take-offquantities1

as required

as required

as required


ComponentsGyproc and Glasroc board products

Gyproc FireLineThickness 12.5, 15mmWidth 1200mm

Gyproc FireLine MR

Thickness 12.5, 15mmWidth 1200mm

Gyproc CoreBoardThickness 19mmWidth 598mm

Gyproc DuraLineThickness 15mmWidth 1200mm

Gypframe Starter ChannelWidths 60 - 70, 92- 146mmLengths 3600 - 6000mmCodes 60 SC 55, 70 SC 70 and

92 SC 90, 146 TSC 90

Gypframe 'J' ChannelWidth 62mmLength 3600mmCodes 62 JC 70

Gypframe metal products

Gypframe 'I' StudsWidths 60 - 70, 92 - 146mmLengths 3600 - 6000mmCodes 60 I 70, 70 I 70 and

92 I 90, 146 TI 90

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1 The quantities required for ShaftWall vary significantly depending onthe dimensions of the installation and the performance specification ofthe system. Refer to section 11 - Quantity take-off details.

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Gypframe metal products Gypframe metal poductsTake-off

quantities1

as required

as required

as required

as required

as required

Take-offquantities1

as required

as required

as required

as required

Gypframe Standard Floor & Ceiling

ChannelWidths 62, 72, 94, 148mmLengths 3600mmCodes (head) 72 EDC 80, 94 EDC 70,

148 EDC 80Codes (base) 62 C 50, 72 C 50,

94 C 70, 148 DC 60

Gypframe Retaining ClipsG108 (for 92mm 'I' Studs)G109 (for 146mm 'I' Studs)

Gypframe Retaining ChannelG102 (for 60 and 146mm 'I' Studs)G110 (for 70mm 'I' Studs)G105 (for 92mm 'I' Studs)All channels 2400mm

Gypframe GA3 Steel AngleLength 3200mmDimensions 32 x 19 x 0.9mm

Gypframe 99 FC 50 Fixng ChannelLength 2400mm

Gypframe GFT1 Fixing ‘T’Length 2400mm

Gypframe GFS1 Fixing StrapLength 2400mm

Gypframe MF5 Ceiling Section (For

horizontal system only)Secondary section below 'I' StudsLength 3600mm

Gypframe MF6 Perimeter Channel

(For horizontal system only)Perimeter support for MF5’s.Length 3600mm

Take-offquantities1

as required

as required

as required

as required

as required

Take-offquantities1

as required

as required

as required

10m2 per

25kg bag

10m2 per

25kg bag

11m2 per

25kg bag


ComponentsFixing and finishing products Fixing and finishing products

Thistle Multi-Finish or Thistle Board Finish To provide a plaster skim finish.or

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Gyproc Drywall ScrewsFor fixing boards to stud framing up to0.79mm thick.

Gyproc Jack-Point ScrewsFor fixing boards to stud framing0.8mm thick or greater and ‘I’ studsgreather than 0.55mm thick.

Gypframe Wafer Head Jack-PointScrewsFor metal-to-metal fixing 0.8mm thickor greater and ‘I’ studs greather than0.55mm thick.

Isover APR 1200For enhanced acoustic performance.

Gyproc CoreBoard Dimensions 19 x 68 x 598mm

and 19 x 122 x 598mm

Gyproc SealantSealing air paths to achieve optimumsound insulation and sealing air shafts.

Gyproc jointing materialsFor a seamless finish.

Thistle Durafinish To provide improved resistance toaccidental damage.or

Thistle Spray FinishGypsum finish plaster for spray orhand application.

1 The quantities required for ShaftWall vary significantly depending onthe dimensions of the insulation and the performance specification ofthe system. Refer to section 11 - Quantity take-off details.

Gyproc FireStripFor sealing deflection heads.


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Construction tips

● The following points should be considered in addition to the construction tips for GypWall CLASSIC

● The estimated construction time is 1.5m2 - 2m2 / man hour (single layer wall with deflection head) or 1m2 - 1.5m2 / man

hour (double layer wall with deflection head) ready for finishing

● If the building envelope is left unsealed while ShaftWall is under construction, Gyproc FireLine MR should be used for

the lining

● The use of pressure conditions in various types of shaft / duct requires that the boards should be sealed into the

framing members using Gyproc Sealant in addition to the normal sealing of the framing to adjoining structures. It is

essential that these areas are identified at a very early stage of the contract and that other trades are instructed to

recognise the need for application of sealant and its replacement if subsequently damaged or removed

● If possible, plan the ShaftWall layout off the line of structural steelwork. This avoids special detailing such as fire

protected Z bars

● The floor track must have continuous support from the structure


Installation

Construction tips (cont’d)

● In high usage areas the face lining of Gyproc FireLine can be substituted

by Gyproc DuraLine to provide a high impact resistant lining. Fire

resistance will not be compromised provided that an equivalent

minimum thickness of board is used

● If required for aesthetic reasons, it is permitted to fix an additional layer

of 12.5mm Gyproc WallBoard to the exposed stud flanges on the shaft

side to provide a smooth, seamless surface

The following procedure relates to a60mm framework, with a 15mmdeflection head. Specific references aremade where the procedure for 70mm,92mm or 146mm frameworks differsfrom this. The wall is installed from theroom side in one direction.

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• Mark the position of the wall.

• Fix floor channel at 600mm maximumcentres.

• Fix head channel aligned and plumbwith the floor channel at 300mmmaximum centres (unless fixing to Zsections which are set at 600mm centres,when two fixings to each Z section mustbe used).

• Position the deep flange of theGypframe 'J' Channel to the shaft orstairwell side.

• Apply continuous Gyproc FireStrip tothe centre line of the head channel priorto fixing to maintain fire performance.

For 92mm and 146mm framing,fix head and floor channel using tworows of staggered fixings, spaced at600mm in each row.

•Cut the Starter Channel 15mm short ofthe measured distance between floor andhead channels in order to accommodate thedesigned deflection.

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• Insert into position, leaving a 15mm spaceat the head, and fix to the vertical abutmentsat 600mm maximum centres.

• For 146mm Tabbed Starter Channeland stud, the tabs must be located closestto the shaft side.

• Cut Gypframe 'I' Studs and GyprocCoreBoard 15mm short of the measureddistance between floor and headchannels.

• Insert Gyproc CoreBoard between thechannels and push tightly into the verticalStarter Channel (use the Gypframe 'I'Stud to temporarily and loosely supportthe opposite edge of the GyprocCoreBoard).

• Fix Gypframe Starter Channels to steeldoor frames at 300mm maximum centres.

•Carry out adjustments of alignment to thevertical with the first Gyproc CoreBoard (allstuds must remain vertical throughout thefixing operation, and all cut ends of GyprocCoreBoard must be square cut for use at thebase and horizontal joints).

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• Fix two 19mm x 122mm GyprocCoreBoard fire-stops (cut on site) betweenthe webs and behind the vertical flangesof the studs and into the head channel(see Junction details – deflectionheads).

• For 92mm and 146mm frameworkstwo head details are available for each.The simplified detail incorporating aGypframe Retaining Clip accommodatesdeflection in respect of initial buildingsettlement. Fix as follows:

• Friction fit a Retaining Clip into the topflanges of each Gypframe 'I' Stud so as toretain a single Gyproc CoreBoard fire-stopwithin the head channel. Use theGypframe G108 component with 92mmframing and Gypframe G109 with146mm framing.

• The alternative head detail canaccommodate deflection due to liveloads. This adopts a dropped soffit anduses two Gyproc CoreBoard fire-stops (cuton site) fixed horizontally to the web ofthe head channel. Use 19mm x 50mmwith a 70mm framework, use 19mm x68mm fire-stops with a 92mm frameworkand 19mm x 122mm fire-stops with a146mm framework (see Junction details– deflection heads).

Retaining Clip

Temporarylocating screw


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• Position Gypframe G102 RetainingChannel in the Starter Channel (useGypframe G110 Retaining Channel in thecase of a 70mm framework andGypframe G105 Retaining Channel in thecase of a 92mm framework).

• Ensure that the Gypframe G102Retaining Channel is securely located inthe tabs when using 146mm framing.

• Push the Gypframe 'I' Stud into itspermanent position to secure the firstsection of core boards.

• To simplify the installation of the finalGyproc CoreBoard when workingbetween fixed points, cut boards to therequired width, (minimum 300mm), less10mm fitting tolerance. Insert the boardsby twisting the flange of the last stud.

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Tabs in 'I' stud

‘turned down’

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• Fire-stop horizontal joints betweenGyproc CoreBoard using a 19mm x122mm Gyproc CoreBoard fire-stop (cuton site). Fix the fire-stop to Gypframe GA3Steel Angle using three Gyproc Jack-PointScrews, and beads of sealant top andbottom.

Before lining board fixing commences, inspect the GyprocCoreBoard to ensure that all componentsincluding fire-stops are correctly located.Apply Gyproc Sealant in the angle formedby the perimeter framing structure.

Board fixing

• Screw-fix tapered edge Gyproc FireLinebase layer boards at 300mm centres to allframing members.

• Screw-fix outer layer boards to allframing members at 300mm centres(200mm at external angles) and staggerboard joints between layers.

NB

Fire-stopping to horizontal Gyproc

CoreBoard joints - Mechanical fix

Gypframe

GA3

Steel Angle


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• Where there is a horizontal joint in thelining boards, stagger end joints by600mm minimum between layers.

• Cut lining boards 15mm short to allowfor the deflection. Do not fix into theflange of the head channel (see Junctiondetails – deflection heads)

• Install Gypframe GFT1 Fixing 'T' tosupport the end joints of single layerboards. Fix Gypframe GFS1 Fixing Strapinstead in double layer boarding betweenboard layers.

• Insert screws at 300mm centres.

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Services

• Penetrations of ShaftWall by services,ducts, control joints and general openingswill require careful detailing. This is toensure that the penetration does notimpair the fire resistance of the wall or actas a mechanism of fire spread. Specificconstruction details should be determinedby the designer.

Airshafts

Where ShaftWall is used to enclose airpressure ducts, Gyproc Sealant is used toseal potential airpaths (see Junctiondetails – Sealing air shafts and serviceducts).

• Apply sealant to the inside face of therear flanges of Gypframe 'I' Studs, headchannel, floor channel and GypframeStarter Channels.

• Seal Gyproc CoreBoard fire-stops,which are located over the horizontaljoints in Gyproc CoreBoard, by applyingbeads of Gyproc Sealant prior to fixing.

• Seal the first layer lining boards to theframework, applying Gyproc Sealant onlyto the face flange of the perimeterchannels.


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Horizontal ShaftWall

Horizontal ShaftWall is installedgenerally as for vertical installation with the following exceptions.

• Use 'JC' or 'EDC' Channels to receivehorizontal studs.

• Fix studs into channels using GyprocWafer Head Jack-Point Screws, into bothlegs of the channel.

• Plasterboard fire-stops are not required.

• Gypframe MF6 Perimeter Channelrequired at perimeter, immediately belowthe ShaftWall channels, fixed at 600mmcentres.

• Gypframe MF5 Ceiling Section fixed atmaximum 450mm centres to theunderside of the Gypframe 'I' Studs withtwo Gyproc Wafer Head Jack-PointScrews.

• Gypframe MF5’s Ceiling Section shouldrun at right angles to the Gypframe 'I' Studs.

• Ceiling linings to be installed generallyin line with CasoLine MF system (centresnot exceeding 230mm in field of boardand 150mm at board ends).

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Junction details - general

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Gypframe 'I' StudGyproc CoreBoardGypframe Retaining Channel

Gyproc FireLine / Gyproc DuraLine123

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20 Intermediate stud 21 Abutting partition (on stud)

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Metal self-drive fixingGyproc CoreBoardGypframe 'I' StudGypframe Retaining Channel

Gyproc FireLine / Gyproc DuraLine liningsGyproc SealantGyproc FireStripGypframe 'J' Channel

Gyproc CoreBoard fire-stop –122mm (cut on site)

Upper line of board fixing intoGypframe 'I' Stud

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22 Abutting partition (off stud) 23 60mm framework (live loads).

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Junction details - deflection heads

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24 70mm framework (live loads). 25 92mm framework (not suitable for live loads).

Gyproc SealantGyproc FirestripGypframe Extra Deep Flange Floor & Ceiling ChannelGyproc CoreBoard fire-stop 122mm

deep (cut on site)Gyproc CoreBoardGypframe Retaining ChannelGyproc FireLine / Gyproc DuraLine linings

Upper line of board fixing into

Gypframe 'I' StudGypframe G108 Retaining ClipGyproc CoreBoard fire-stop nominally50mm wide (cut on site)Gyproc CoreBoard as dropped soffit

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26 92mm framework (live loads). 27 146mm framework (not suitable for live loads).

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Gyproc SealantGyproc FireStripGyproc CoreBoard as dropped soffitGypframe Extra Deep Flange Floor &Ceiling Channel

Gyproc CoreBoard fire-stop –122mm deep (cut on site) Gyproc Core BoardGypframe Retaining ChannelGyproc FireLine / Gyproc DuraLine linings

Gypframe G109 Retaining ClipUpper line of board fixing into

Gypframe 'I' StudGyproc CoreBoard fire-stops nominally68mm wide (cut on site)

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Junction details - deflection heads (cont’d)

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28 146mm framework (live loads).

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Gyproc SealantGyproc FireStripGyproc CoreBoard as dropped soffitGyproc CoreBoard fire-stop –122mm (cut on site)

Gypframe Extra Deep Flange Floor &Ceiling ChannelGyproc CoreBoardGypframe Retaining Channel

Gyproc FireLine / Gyproc DuraLine liningsUpper line of board fixing into

Gypframe 'I' Stud

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Gypframe 'J' Channel (to frame theopening)Gyproc Profilex Access Panel

Gypframe 'I' StudsGyproc CoreBoardGyproc FireLine / Gyproc DuraLine lining

Gypframe Retaining Channel1

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29 Opening between studs

Section YY

Section ZZ

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Junction details - Gyproc Profilex Access Panel


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Junction details - doors

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Gypframe 'J' ChannelGypframe 'I' StudGyproc CoreBoard

Gypframe Retaining ChannelGyproc CoreBoard packer (cut on site)Gyproc FireLine / Gyproc DuraLine linings

Gypframe Starter ChannelDoor frame

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30 Access door - spandrel panel detail 31 Access door jamb detail

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32 Lift door (Gypframe Starter Channel mechanically fixed to frame). 33 Sealing head (pressurised system).

Gyproc SealantGyproc CoreBoardGypframe Retaining Channel

Gypframe Starter ChannelGyproc FireLine / Gyproc DuraLine liningsGyproc FireStrip

Gypframe 'J' ChannelGyproc CoreBoard fire-stop (cut on site)

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Junction details - sealing air shafts & service ducts


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Gypframe 'I' StudGyproc CoreBoardGyproc FireLine / Gyproc DuraLine linings

Gypframe Floor & Ceiling ChannelGyproc SealantGypframe Retaining Channel

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34Base detail (Gyproc CoreBoard only requires sealing into channelfor pressurised system). 35

Sealing of Gyproc CoreBoards to Gypframe 'I' Stud (pressurised system).

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Gypfame Starter ChannelGyproc CoreBoardGypframe Retaining Channel

Gyproc SealantGyproc FireLine / Gyproc DuraLine liningsStructure

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36 Junction with other elements (pressurised system).

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Documents

190 5 ShaftWall - british-gypsum.com/media/Files/British-Gypsum/SITE... · Gypframe MF5 Ceiling Section ... Gyproc and Glasroc board products Gyproc FireLine Thickness 12.5, ... Installation