ERIC MOLOBI HOUSINGINNOVATION HUBPaimaan ByronStructural EngineerPaimaanB@nhbrc.org.za

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OVERVIEW

• Housing Innovation Hub• Innovative Systems - Definition• National Building Regulations• Assessment criteria• Participating stakeholders• Project Update• Lessons Learned

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Housing Innovation Hub

Housing Minister’s Project – Thorntree View (Soshanguve A)

New housing designs “…that will provide a wider choice of quality, aesthetically pleasing and affordable homes.”

200 Stands (100 Subsidy and 100 Affordable)

Competition

Roll-out

Integrated Development Roll-out (2000 Stands) – houses, schools, clinic and other amenities.

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Innovative Systems - Definitions

Use of new materials in building houses;

New ways or methods of applying ‘traditional’ materials;

Performance based – ‘fit for purpose’.

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Assessment Criteria

i. Structural Performance (Strength & Stability)ii. Fire resistanceiii. Water Penetrationiv. Condensationv. Thermalvi. Durabilityvii. Acousticsviii. Construction manual (process)ix. Quality manual (quality control)

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Level 1

Level 2

Level 3

Level 4

GOAL (National Building Regulations & Building Standards Act (Act 103 of 1977)

FUNCTIONAL REQUIREMENTS

PERFORMANCE REQUIREMENTS

EVALUATION

By application of deemed-to-satisfy design and construction rules

By testing and / or assessment

By application of well established engineering principles

By expert opinion and judgment

Act

NBRs

SANS 10400- 3rd

edition

SANS 10400- 3rd

edition plus SANS 2001

Competent person

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Participating Stakeholders

NHBRC

City of Tshwane

Department of Human Settlement

Private Partnership – Innovative Building System owners

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Project Update

Roll out (Subsidy Housing units and Credit linked)

NHBRC Training Facilities (Martha Molobi Training facility)

NHBRC Testing Laboratory

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Lessons LearntBenefits

Variety of housing products

Use of different systems encouraged competition in

costing

Transfer of skills and creation of jobs

Sharing of information among developers

Promote collaboration and partnership

Promote use of innovative materials & products

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Lessons Learnt (cont)

Challenges

Meeting NBR Technical Requirements

Limitations on subsidy Budget

Lack of trained inspectors / Artisan

Long term performance of the IBS is unknown

Support form local authorities

Acceptability by the community / Community liaison

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Participating Innovative Systems

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SA Steel HomesLight Steel Frame

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SA Steel Homes System Description

Wall panels, consisting of a high quality load bearing steel framework comprising of base rails, lipped channel, studs and noggings, bracing and top rails to which ceiling panels and roofstructures are fixedCeilings are formed either by fixing 12 mm gypsum plasterboard to the underside of the galvanized steel roof panels.

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FinnBuilder Show House

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FinnBUILDER System Description

• FinnBUILDER is an easy way to build very strong structures at low cost. It is a slip form of concrete shuttering, using non-slump 20MPa concrete.

• The formwork is filled with concrete, compacted and moved forward to extrude a continuous concrete wall.

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Fezekile Holdings

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Fezekile Holdings (Robust)System Description

• The Robust building system utilizes a patented, metal core mesh in a W profile configuration, which has mortar applied to it using specialized Robust spray equipment or hand packing methodology, using labour, to create a steel reinforced concrete wall.

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MOLADI

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Moladi System Description

• The Moladi system is unique in that it forms all the walls of a building, at the same time, it brings to field construction all the benefits of a factory assembly line – quality work, by unskilled workers, at maximum rates of production.

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Intercon

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Intercon System Description

• Walls are constructed using polycon cement blocks. It consists of aggregates comprising coarse sand, cement and expanded polystyrene beads. The expanded polystyrene material is a closedcell material is a closed cell material and cannot absorb water.

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Profica / Vela

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Profica / Vela System Description

• The lightweight steel frame comprises of a galvanized steel stud, channel and truss system which makes up the structural componentof the building. The steel frame is then clad externally with a brick façade or an alternative specified finish.

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4Site Powerwall

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4Site Powerwall System Description

• Brick is stackable, lightweight, fire resistant with a higher MPA than a normal stock brick and similar in appearance to face brick but can be plastered. The mortar laying process is eliminated with a bonding solution.

• Electrical wiring, piping and plumbing are hidden in the frame.

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A&D Holdings (People’s Building System)

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A & D Holdings – System Description

• Specially designed Locking Blocks are used jointed with the stitches of Fibre Reinforced Polymer having a tensible strenght of 3,8 MPa.

• The jointing between two consecutive blocks, in the same course is made with one stitch of adhesive.

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Styrox

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Styrox System Description

• Unique StyroPlast plaster system takes on colour of plaster sandused, applied by brush or spray, water resistant system with imprevious polystyrene blocks and plaster.

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Ubomi

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Ubomi System Description

• Light steel frame, with fill of polystyrene. • A layer of mortar plaster is applied to the interior and exterior of the

expanded polystyrene by wrapping a metal mesh around the wall assembly. This allows for any finish to be applied, for the desired architectural effect on either the interior or exterior walls.

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Eezy Built Show House

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Eezy Built System description

• The EezyBuilt Housing System uses structural insulated panels for walls, ceiling and roof of the home. The builder is required to assemble only the pre-cut panels and mount them on the concrete slab.

• The EezyBuilt home is also available in conventional form with face brick outside walls and plaster and paint finish inside.

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Solbric

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Solbric System Description

• Dry joint walling. Each brick must be leveled to make sure that the following Solbrick dry stacking brick will be perfectly horizontal and all the bricks must be touching each other for good interlocking. Mortar must be applied in the openings to seal and bond all the first row bricks.

• Once the wall is finished, the surface must be watered well for treatment. Mortar grouting must be applied to seal all the outside joints.

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ACKNOWLEDGMENT

• Ms D Gezler : NHBRC• Mr R Mamphaga : Consultant• Dr J Mahachi : NHBRC• NHBRC database• Mr J Kondos : ABSA

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• Questions ?