encasement system ShaftWall™ - Gyproc SHAFTWALL.pdfMinimal wall thickness from 80mm May 2008 1...

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Shaft and duct encasement system

ShaftWall™ provides a lightweight,non-loadbearing fire-resistantstructure to protect elements withinthe service cores of modern fast-trackdevelopments. It is also used to protectall forms of shafts and ducts inconventional buildings. The systemprovides a protective structure whichcan be incorporated at an early stageof the building before the buildingenvelope is sealed. The system canalso be built horizontally to provide afire-rated membrane. StairWall is aderivative of the ShaftWall™ systemwhich is used to protect stairwells.

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Technical support: T 01 629 8400 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

● Can achieve up to 120 minutes fire resistance in

both directions

● Horizontal membranes built entirely from below

● Satisfies BS5234 strength and robustness

requirements up to Severe Duty

● Can be installed prior to making the building

envelope weather-tight

● Minimal wall thickness from 80mm

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Gypframe MF5 Ceiling Section (horizontal ShaftWall only)

19mm Gyproc CoreBoard firestops

Gypframe ‘I’ Stud, Gypframe Retaining Channel

Gypframe Floor & Ceiling Channel

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ComponentsGyproc and Glasroc board products

Gyproc FireLine

Thickness 12.5, 15mm

Width 1200mm

Gyproc FireLine MR

Thickness 12.5, 15mm

Width 1200mm

Gyproc CoreBoard

Thickness 19mm

Width 600mm

Gyproc DuraLine

Thickness 15mm

Width 1200mm

Glasroc MultiBoard

Thickness 12.5mm

Width 1200mm

Gypframe Starter Channel

Codes 60 SC 55, 70 SC 70,

92 SC 90 and 146 TSC 90

Gypframe ‘J’ Channel

Codes 62 JC 70

Gypframe metal products

Gypframe ‘I’ Studs

Codes 60 I 70, 70 I 70,

92 I 90 and 146 TI 90

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Gypframe metal products Gypframe metal poducts

Gypframe Standard Floor & Ceiling Channel

Codes (head) 62 JC 70, 72 EDC 80

94 EDC 70, 148 EDC 80

Codes (base) 62 C 50, 72 C 50,

94 C 70, 148 DC 60

Gypframe Retaining Clips

G108 (for 92mm ‘I’ Studs)


Gypframe Retaining Channel

G102 (for 60 and 146mm ‘I’ Studs)



Gypframe GA3 Steel Angle

Length 3200mm

Dimensions 32 x 19 x 0.9mm

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Gypframe 99 FC 50 Fixng Channel

Length 2400mm

Gypframe GFT1 Fixing ‘T’

Length 2400mm

Gypframe GFS1 Fixing Strap

Length 2400mm

Gypframe MF5 Ceiling Section

(For horizontal system only)

Secondary section below ‘I’ Studs

Length 3600mm

Gypframe MF6 Perimeter Channel

(For horizontal system only)

Perimeter support for MF5’s.

Length 3600mm


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ComponentsFixing and finishing products Fixing and finishing products

Gyproc FireStrip

For sealing deflection heads.

Gyproc Skimcoat, Gyproc Carlite

Finish or Gyproc Board Finish

Providing a plaster finish.

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Gyproc Drywall Screws

For fixing boards to stud framing up to

0.79mm thick.

Gyproc Jack-Point Screws

For fixing boards to stud framing

0.8mm thick or greater and ‘I’ studs

greather than 0.55mm thick.

Gypframe Wafer Head Jack-Point Screws

For metal-to-metal fixing 0.8mm thick or

greater and ‘I’ studs greather than

0.55mm thick.

Moy Acoustic Roll

For enhanced acoustic performance.

Gyproc CoreBoard FireStops (cut on site)

Dimensions 68mm x 598mm and

122mm x 598mm

Thickness 19mm

Gyproc Sealant

Sealing air paths to achieve optimum

sound insulation and sealing air shafts.

Gyproc jointing materials

For a seamless finish.



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Construction tips

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

● 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

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Installation

Construction tips (cont’d)

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

substituted by Glasroc MultiBoard or 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 the room sidein one direction.

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• Mark the position of the wall.

• Fix 62mm and 72mm Gypframe FloorChannel along their centre line to thefloor at 600mm centres with suitablefixings (by others).

• Fix 62mm and 72mm Gypframe HeadChannel aligned and plumb with thefloor channel at 300mm maximumcentres (unless fixing to Z sections whichare set at 600mm centres, when twofixings to each Z section must be used).

• Position the deeper flange of theGypframe 62mm ‘J’ Channel to the shaftor stairwell 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. Each row staggeredby 300mm.

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

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•Insert the Starter Channel into position,leaving a 15mm space at the head.maximum centres.

•For 62mm and 72mm framing,fix along the centre line to the verticalabutments at 600mm maximumcentres.

For 92mm and 146mm framing,fix Starter Channels to vertical abut-ments using two rows of staggered fix-ings, spaced at 600mm in each row.Each row staggered by 300mm.

•Cut Gypframe ‘I’ Studs and GyprocCoreBoard 15mm short of the measureddistance between floor and head channels.

• Insert first Gyproc CoreBoard betweenthe channels and push tightly into thevertical Starter Channel (use theGypframe ‘I’ Stud to temporarily andloosely support the opposite edge of theGyproc CoreBoard).

• Continue to insert Gyproc CoreBoardbetween channels and ‘I’ Studs.

•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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• For 62mm framing fix two vertical19mm x 122mm Gyproc CoreBoardfirestops (cut on site) between the websand behind the vertical flanges of thestuds and into the head channel. See‘Junction details – deflection heads’, later.

• For 72mm framing fix two horizontal19mm x 50mm Gyproc CoreBoardfirestops (cut on site) between the websand behind the vertical flanges of thestuds and into the head channel. See‘Junction details - deflection heads’, later.

• 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 firestopwithin 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 firestops (cuton site) fixed horizontally to the web ofthe head channel. Use 19mm x 68mmfirestops with a 92mm framework and19mm x 122mm firestops with a 146mmframework. See ‘Junction details –deflection heads’, later.

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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 firestop (cuton site).

• Fix the firestop to Gypframe GA3 SteelAngle using three evenly spaced GyprocJack-Point Screws, and beads of sealantapplied top and bottom.

• Apply Gyproc Sealant in the angleformed by the perimeter framingstructure.

Before lining board fixingcommences, inspect the GyprocCoreBoard to ensure that all componentsincluding firestops are correctly located.

Board fixing - single layer

• Fix Gyproc FireLine boards to all framingmembers at 300mm centres (200mm atexternal angles) using the appropriatelength Gyproc Jack-Point Screws.

Select appropriate screw length toprovide a nominal 10mm penetrationinto the Gypframe Steel framing.

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Fire-stopping to horizontal Gyproc

CoreBoard joints - Mechanical fix

Gypframe

GA3

Steel Angle

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Board fixing - multi-layer

• Fix base layer Gyproc FireLine boards toall framing members at 300mm centresusing the appropriate length Gyproc Jack-Point Screws.

• Fix outer layer Gyproc FireLine boards toall framing members at 300mm centres(200mm at external angles) using theappropriate length Jack-Point Screws.

• Stagger board joints between layers.

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• Cut lining boards 15mm short to allowfor the deflection. Do not fix into theflange of the head channel. See ‘Junctiondetails – deflection heads’, later.

• Where there is a horizontal joint in thelining boards, stagger end joints by600mm minimum between layers.• Install Gypframe GFS1 Fixing Strap orGypframe GFT1 Fixing ‘T’ progressivelybetween studs, to support the end jointsof single layer boards.

• Install Gypframe GFS1 Fixing Strapbetween board layers, to support endjoints, in double layer boarding.

• Insert screws at 300mm centres.


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Services

• Penetrations of ShaftWall™ by services,ducts, control joints and generalopenings will require careful detailing.This is to ensure that the penetrationdoes not impair the fire resistance of thewall or act as a mechanism of fire spread.Specific construction details should bedetermined by the designer.

Sealed systems

Where ShaftWall™ is used to enclose airpressure ducts, Gyproc Sealant is used toseal potential airpaths.See ‘Junction details – Sealing air shaftsand service ducts’.

• Apply sealant to the inside face of therear flanges of Gypframe ‘I’ Studs, headchannel, floor channel and GypframeStarter Channels, prior to installingGyproc Core Board.

• Seal Gyproc CoreBoard firestops, whichare located over the horizontal joints inGyproc CoreBoard, by applying beads ofGyproc 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 firestops are not required.

• Gypframe MF6 Perimeter Channelrequired at perimeter, immediatelybelow the ShaftWall™ channels, fixed at600mm centres.

• 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’ Stud

Gyproc CoreBoard


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20 Intermediate stud 21 Abutting partition (on stud)

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Metal self-drive fixing (by others)

Gyproc CoreBoard



Gyproc FireLine / Gyproc DuraLine linings

Gyproc Sealant

Gyproc FireStrip


Gyproc CoreBoard fire-stop -

122mm (cut on site)

Upper line of board fixing into


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

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15mm

15mm

15mm

Junction details - deflection heads

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

Gyproc Sealant

Gyproc Firestrip

Gypframe Extra Deep Flange Floor &

Ceiling Channel

Gyproc CoreBoard fire-stop 122mm

deep (cut on site)

Gyproc CoreBoard





Gypframe G108 Retaining Clip

Gyproc CoreBoard fire-stop nominally 50mm

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 Sealant

Gyproc FireStrip


Gypframe Extra Deep Flange Floor &

Ceiling Channel

Gyproc CoreBoard fire stop -

122mm deep (cut on site)

Gyproc Core Board



Gypframe G109 Retaining Clip



Gyproc CoreBoard fire-stops nominally

68mm wide (cut on site)

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Junction details - deflection heads (cont’d)

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146mm framework (live loads).

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Gyproc Sealant

Gyproc FireStrip


Gyproc CoreBoard fire-stop -

122mm (cut on site)

Gypframe Extra Deep Flange Floor

& Ceiling Channel

Gyproc CoreBoard





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Gypframe ‘J’ Channel (to frame the

opening)

Gyproc Profilex Access Panel

Gypframe ‘I’ Studs

Gyproc CoreBoard

Gyproc FireLine / Gyproc DuraLine lining

Gypframe Retaining Channel1

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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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Gyproc CoreBoard


Gyproc CoreBoard packer (cut on site)



Door 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 Sealant

Gyproc CoreBoard




Gyproc FireStrip


Gyproc CoreBoard fire-stop (cut on site)

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Junction details - sealing air shafts & service ducts


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Gyproc CoreBoard

Gyproc FireLine / Gyproc

DuraLine linings

Gypframe Floor & Ceiling Channel

Gyproc Sealant


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Base detail (Gyproc CoreBoard only requires sealing into

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Sealing of Gyproc CoreBoards to Gypframe ‘I’ Stud

(pressurised system).

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Gypfame Starter Channel

Gyproc CoreBoard


Gyproc Sealant


Structure

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encasement system ShaftWall™ - Gyproc SHAFTWALL.pdfMinimal wall thickness from 80mm May 2008 1...

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