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Innovative Walling Systems - with special reference to Strongwall Concept Wimal Samarasinghe

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  • Innovative Walling Systems -with special reference to Strongwall Concept Wimal Samarasinghe

  • Performance RequirementsStructurally sound No water penetration Adequate fire resistance Good thermal resistance Good acoustic properties

    Good air quality

    No mould growth

  • Driving Factors Builders ViewCheaper to Build Easy to Build with Minimum Supervision Speedy Construction Quality of construction

    Lightweight Minimum Wastage

    Cleaner Site

  • Sri Lanka is not different!!!

  • Once the construction is completed.

  • Market Potential - Australia1999-2000 : 1.73 billion Bricks Produced

    1999 2000 : 75% - 80% in Domestic Construction

    Current figures shows a decline in the brick usagePicture 1- row of houses with bricks exposed.

  • Why Masonry is Popular?Superior Fire Resistance

    Good Acoustic Properties

    Good Thermal Properties

    Good Structural PropertiesExcellent Properties

  • Walls tested for fire ratingLoadbearing wall. (fire exposed face) after 3 hours Loadbearing wall after 8 minutes into the test.

  • Why Masonry is Popular?Different Colours of Bricks

    Different Mortar joint Colours

    Aspect ratio of units

    Visually Appealing

  • Why Masonry is Popular?

    FlexibilityEasy to fit into any shape

    Easy to fit into different Lengths and Heights of Walls

    Used in Un-reinforced and Reinforced conditions

  • Why Masonry is Popular?Easy to build & maintainDurablelow maintenanceMinimum SupervisionCheaper if labour is cheaper

    Traditionally accepted

  • Why masonry is not the preferred option amongst builders?Speed of Construction Field built hand constructed nature Age effect of tradesmanQuality Assurance Structural LimitationsHigh earthquake forces Higher dead weights stronger foundations Brittle nature Low tensile bond strength

  • Innovative Masonry - Slick BrickDriving Factors Speed & quality No filling of vertical joint No trowelling Minimum skilled labour Pre-mixed mortar

  • Slick Brick Masonry - DisadvantagesHigh precision in bricks costly!

    Lack of water penetration resistance

    Aesthetically not appealing

    Rendering costly!

  • Innovative Masonry Smart Block & Key

  • Smart Masonry - ConstructionVery fast assembly of blocks in stack bondContains steel reinforcementsCore filled with pre-mixed groutDo not depend on skilled labour

  • Smart Masonry Issues of ConcernVery poor water penetration resistance

    Unusual appearance

  • Self aligned lightweight Benex blocks

  • Benex block wall

  • Precast panelised wallsNeed heavy lifting equipmentCustom designedManufacturing process is tediousFast assemblyMinimum site labourWalling system is not cheaperCleaner site

  • Light gauge steel framed walls

  • Modular housing units

  • Walltech building system

  • Walltech building system

  • Panelised Masonry

  • Major Construction IssuesCostTime to completionQualityOHS issuesEnvironmental issues

  • What is Strongwall?Strongwall is a lightweight, solid and strong modular construction system for the construction of load bearing and non-load bearing walls used in the buildings. Currently the system has been licensed to use inAustralia (Hadrian Eco Systems Pty Ltd)Singapore (Newall Pty Ltd)Sri Lanka (Rapidwall Pty Ltd)

  • What is Rapidwall?Rapidwall is a Sri Lankan company registered in SL

    Rapidwall is the licensee to use and market the Strongwall System in SL which is owned by Strongwall International Limited (SIL) in Australia

    SIL is also a shareholder of the Rapidwall

    It provides a total cost effective solution for housing

  • The Strongwall conceptA building system invented by Mr George Hanna

    Researched, further developed and performance assessed by CSIRO from 2000 2007

    Patents have been secured in more than 40 countries in the world including Sri Lanka

  • The Strongwall ConceptLightweight modular walling system Modules are 250mm wide; Length up to 3.6m, weight approx. 35kg Completely dry wall system Requires only a crow-bar, hammer and a drill Does not require skilled labour Can accommodate services very easily without any chasing of the walls Wall thickness = 125mm

  • CompatibilityStandard doors and windows are easily fittedCan be used with conventional foundations footings/floorsFacilitate fixings to roof members and floorProvide easy access to wall cavities for plumbing/electrical/gas/telecom services etc.Walls can be finished with standard external and internal finishes, if required

  • Technical Performance Tested and verified at CSIRO for compliance with BCA No water penetration Non-combustible materials Load bearing up to 2 storey External cladding and internal partitions in high rise buildings Cyclone rated for C3 wind category Earthquake resistant Thermal rating R3 Acoustic rating Rw + Ctr >50 Termite resistant

  • The SystemPure Simplicity

  • a proven concepta modular building systema dry-wall system very fast & easy to build

  • create no wasteno lintelsBuild on conventional foundations 250mm wide & 113mm deepmodules

  • any window frame can be fittedany door frame can be fittedno screws, No gluesimply connect withKeys & wedges

  • assembly of A modulesmodules weighs 30kgassembly of B modulesB modules are non-structural

  • easy to engage B modulescan be rendered, painteda neatly finished wallno chasing for services

  • What are the elements of theStrongwall System?A module structuralB module non structuralCorner moduleKeys & wedgesFloor bracketRoof bracket250mm long rods

  • What are the tools required at site?A hammer

    A Drill

    A Pinch bar

  • Strongwall material for modules..

    Ave. comp. str. >60MPa

    Ave. tensile strength >15MPa

    Manufacturing:

    Extrusion

    Casting

  • Strongwall AdvantagesExtremely fast to assembleCheapest wall system in the market in AustraliaMinimum labour and skill levelNo site wastage at allNo joint filling with sealant/adhesiveNo lifting equipment or scaffoldingNo lintels

    No chasing of walls for servicesModules can be saw cut/drilledWall cavity can be very easily accessibleCan be erected under all weather conditionsCan be easily de-assembled and re-used

  • Australian cost comparison

    Chart2

    74

    105

    151

    350

    Wall type

    Cost per sq.m of wall

    Sheet1

    S

    Strongwall$74

    Clad framework$105

    Brick cavity wall$151

    Precast conc wall$350

    Sheet1

    0

    0

    0

    0

    Wall type

    Cost per sq.m of wall

    Sheet2

    Sheet3

  • Low cost housing for Sri Lanka51.1 sq.m 2 bed room single unit

  • Low cost housing for Sri Lanka66.3 sq.m 3 bed room single unit

  • Low cost housing for Sri Lankacluster units - each 51.1 sq.m. 2 bed room unit

  • Items taken for costingExcavation & rubble foundation with a conc. Plinth

    3 thick concrete floor Strongwall module packaging & transportation Building walls Timber doors & windows

    One toilet, shower & septic tank Wiring for 7 light points, 3 power sockets and distribution board Plumbing with 1 kitchen tap & sink Painting

  • Sri Lankan cost for low cost housing

    Chart2

    11501575

    10751475

    11751550

    With A modules

    with B modules

    House type

    Cost per sq.m of floor area

    Rs1150

    Rs1075

    Rs1175

    Rs1575

    Rs1475

    Rs1550

    Sheet1

    S

    Australian conditions

    $/sq.m. of wall area

    Strongwall$74

    Clad framework$105

    Brick cavity wall$151

    Precast conc wall$350

    Sri Lankan conditions

    Low cost housing-2 bed rm single unit11501575per sq.m. of floor area

    Low cost housing-2 bed rm duplex10751475per sq.m. of floor area

    Low cost housing-3 bed rm single unit11751550per sq.m. of floor area

    Sheet1

    Wall type

    Cost per sq.m of wall

    Sheet2

    With A modules

    with B modules

    House type

    Cost per sq.m of floor area

    Rs1175

    Rs1075

    Rs1150

    Rs1550

    Rs1475

    Rs1575

    Sheet3

  • Quality Housing

  • Thank You

    VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002VII Structural Masonory Seminar - Brazil - Sept 2002


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