TE

CH

NIC

AL

no

te

DOMING CAUSED BY SWELLING OF REACTIVE SOILS

Joint width as constructed

Joint width INCREASES at top of wall

DISHING CAUSED BY SHRINKAGE OF REACTIVE SOILS

Joint width as constructed

Joint width DECREASES at top of wall

Damp-proof course (DPC)

Articulation joint may commence above DPC if close to footing

! 4.5 mfrom corner

! 6.0 m(no openings)

! 4.5 mfrom corner

! 4.5 mfrom corner

! 4.5 mfrom corner

! 4.5 mfrom corner

! 4.5 mfrom corner

! 5.0 m(openings > 900 x 900)

! 4.5 mfrom corner

Family room

Loungeroom

Bed room Bed room

Dinningroom

Kitchen Laundry Bath Bed room

Articulation joints

Sealed articulationjoint between single-and two-storey wall

Open articulationjoint between masonryfence and house

If length greater thanspacing in Table 2,provide articulation joints

Spacingfrom Table 2 orto suit footing design

Articulation joint

If masonry extendsover openings, seeFigures 9 or 11

! 4.5 mfrom corner

Articulation joint

Clad frameinfill panel

Maximum spacingfrom Table 2

Spacing, see Section 5

Articulation joint

If > 1800 mm wide,consider providingarticulation jointsboth sides of window

Maximum spacing from Table 2

Spacing, see Section 5

Articulation joint

Figure 11

Figure 10 Alternative Figures 12,13

If > 1800 mm wide, consider providing articulation joints both sides of window

Spacing, see Section 5 Maximum spacing from Table 2

Articulation joint

Articulation joint

Joint extends through window sill

Figure 10 Alternative Figures 12,13

If > 1800 mm wide, consider providing articulation joints both sides of window

Spacing, see Section 5 Maximum spacingfrom Table 2

Articulation joint

Min. 600

If > 1800 mm wide,consider providingarticulation jointsboth sides of window

Steel lintel withvertical legin cavity

Window/door frame

Articulation joint

Articulation joint

Slip joint below steel lintel(eg, two layers of DPC)

Slip joint (eg, two layers ofDPC or compressible materialused in articulation joint) Articulation joint

Window frame

Window sill

Articulation joint

Steel lintel withvertical legin cavity

Window/door frame

Articulation joint

Articulation joint

Slip joint above and belowsteel lintel (eg, two layersof DPC) Provide sealantalong front of lintel

Compressible material at end of lintel to allowmovement (width to match articulation joint)

Steel lintel withvertical legin cavity

Window/door frame

Articulation joint

Articulation joint

Slip joint below steel lintel(eg, two layers of DPC)

Expansion materialat end of steel lintel(width to matcharticulation joint)

Slip joint (eg, two layers of DPCor compressible material usedin articulation joint)

Elastomeric sealant

Service run in chase(eg, insulatedhot-water pipe)

Articulation joint

Elastomeric sealant

Compressible fillerD

d*

* If depth of chase > 0.25D an articulation joint is required

Render terminated in renderstarter or expansion joint trim

Articulation joint

Clay brickwork

Articulation joint Articulation joint

Concrete or sand/lime brickwork Concrete blockwork

Articulation jointwith sliding ties

Return wallrequired forlateral restraint

Return wall requiredfor lateral restraint

300max.

Articulation joint Articulation joint

INCORRECT CORRECT CORRECT

Gap formed bytemporary filler

Masonry expansion(sliding/extendable) tie

Elastomeric sealant10

10minimum

Backer rod*

* Open-cell polyurethane or closed-cell polyethylene to ensure proper sealant dimensions

Articulation joint

Compressible foam orpolystyrene filler builtin by bricklayer

Elastomeric sealant

Articulation joint Articulation joint

Face of lintel may be sealed

Morethan 1800

! 4.5 mfrom corner but if! 2.0 m, joint willbe of little benefit

Articulationjoints

Note:Various tie typesavailable Masonry expansion tie

screwed to window frameArchitrave conceals joint on inside

Cover moulding concealsarticulation joint on outside

Window/door frame

Gap

Articulation jointIncreased riskof zig-zag cracking ifwidth between openingsis less than 1200 mm

1200 min.recommended

Eaves lining above externalwall and window/door heads

External masonry wallstops under eaves lining

Horizontal eaves lining

External wall supports roof structure

Alternative rakedeaves lining

Eaves support framing, fixed to roofframing and not masonry wall

Optional cover moulding fixedto supporting timber forhorizontal eaves or rafter/top plate for raked eaves

Full-heightdoor andfull-height frame

Infillpanel

Articulation joint(If arch bar used, seeFigures 10 and 12for details)

Articulation joint Articulation joint

Standard-heightdoor andfull-height frame

Standard-heightdoor andstandard metal frame

Maximum spacing from Table 2

Articulation joint locatedaway from mid-point ofgable, where maximummovement occurs

Infill panel

Articulation joint

Keep distance between articulation joints to a minimum (5 m maximum)

Articulation joint Provide bed-joint reinforcement over arch

Potential crack at crown of arch (weakest point)

Spring line

Arch height

Arch depth (300 mm minimum)

Arch span Buttress width*

Buttress width designed to resisthorizontal force from arch andoverturning

*

Arch rise (0.25 x span minimum)

(a) PERIMETER WALL WITH FRAMED OR TRUSSED ROOF (Internal wall with framed roof similar detail)

(b) INTERNAL WALL WITH TRUSSED ROOF

Cornice fixed to roof framing onlyallowing movement of masonry wall

Cornice fixed to rooftruss only allowingmovement ofmasonry wall

Bottom chord of roof truss

Gap sufficientto allow forexpected movement

(a) PERIMETER WALL WITH FRAMED OR TRUSSED ROOF (Internal wall with framed roof similar detail)

(b) INTERNAL WALL WITH TRUSSED ROOF

Cornice fixed to roof framing onlyallowing movement of masonry wall

Cornice fixed to rooftruss only allowingmovement ofmasonry wall

Bottom chord of roof truss

Gap sufficientto allow forexpected movement

Articulation joint

Bed-jointreinforcement

Extendreinforcement 600 mmminimum past openings

Articulation joint

Articulation joint withgunned-in elastomericsealant

Bars in reinforced concretebond beam stoppedat articulation joint

Dowel bars, with cap at one end, threaded through compressiblefiller and placed in bond beam at articulation joint.Bars must be horizontal and parallel

CCAA OFFICES

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EMAIL: info@ccaa.com.au

LAYOUT: Helen Rix Design

Disclaimer: Cement Concrete & Aggregates Australia is a not for profit organisation sponsored by the cement, concrete and aggregate industries in Australia to provide information on the many uses of cement, concrete and aggregates. This publication is produced by CCAA for that purpose. Since the information provided is intended for general guidance only and in no way replaces the services of professional consultants on particular projects, no legal liability can be accepted by CCAA for its use.

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