Construction Analysis: Lake Wendouree House- Assignment 3

ABPL20033 - Construction Analysis, Semester 2 - 2019 Dr Alberto Pugnale, Subject coordinator Dr Sofia Colabella, Senior Tutor Aleks Baltovski, Tutor Jarel Cheah, 998651, 15/09/19 John Wardle Architects - Lake Wendouree House, Tutorial 13.

ASSIGNMENT 3

FLIPBOOK SECTION 3D: Layers of information

1. Structural Systems, below ground How did the site condition affect the design of the house ?

Waffle Slab Horizontal

Artificial topography as the architect wanted different floors level.

Void former

The design of Lake Wendouree House is highly dictated by the various limitations and advantages of the site such as adjacent property views. The existing site topography was mostly flat, therefore an artificial topography was created to crate more interest. Due to the long plot of land available, the overall form of the house is forced to be built along the boundary walls, this has created long corridors/walkway and might be the reason for the extensive corridors found in the house. As the view towards the lake was essential, a custom frame was built in the living room to frame the views.

Structural systems, below ground

Reinforced mesh

Square mesh

SL62 & SL82

Trench Mesh

3-L12 TM

Stairs reinforcement

In the conservatory, additional fill were created to form stairs. This level change is introduced to give hierarchy to different spaces. John Wardle might’ve wanted to create a strong boundary between the conservatory and kitchen as they are directly next to each other.

Re-entrant bars Internal beams Vertical Pad footings

PF1 1000 SQ x 500min deep blinding concrete pad footing centered beneath column and edge beams

Square Mesh

Re-entrant Bars

Trench Mesh Polyethylene Membrane Pad Footing

Steps before leading to laundry door to create a threshold.

Reinforcement mesh for steps

Steps to conservatory created with more backfill.

Reinforcement mesh is placed

2 types of square meshes placed on top of voidformers to prevent concrete from cracking

50mm Sand Bedding Compacted Fill Natural Stiff Clay

Void formers placed so they create spaces in between them, allowing for concrete to be cast in to form strips of concrete. This is a structural system in itself.

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Internal Beam

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2. Structural Systems, above ground

Primary Structure

How does the structure define the composition of architectural form and space ?

Architectural form and space is defined by structural limitations of material spans and sizes. As electrical and plumbing services go around the building, A porch is created in the external laundry entrance due to the cantilever created, which not only provides shading but also signifying a change in threshold as on enters from the outside to the inside of the house.

Each bedroom has varying levels of ceiling height, as the intent was to create individual bedroom pavilions resembling boathouses. (Bedroom 2 - 2540 mm and 3200 mm, Bedroom 3 – 3200 mm and 3400 mm).

Ground Floor

Horizontal

Structural Systems, above ground

PFC, SHS, RHS

Steel and Timber Beams

Horizontal

Framing for Skylight supports glass.

Rafters meet at both ends of the frame so openings can be formed for skylight.

Timber beams angled to follow roof form, plasterboard lining will be connected to this to form ceiling.

Steel Columns

Vertical

First Floor 2/90 x 45 F17 KDHW Timber columns integrated with stud walls and extend to meet U beams to support roof structure.

Steel beams

PFC,UB, Hyspan LVL

Vertical 140 x 45 F17 KDHW Ceiling joists connected to stud walls on one end and girder truss on the other to support box gutter.

Cranked Ubeam and KD Pine connected to top plate of timber stud wall

Universal beams with solid blocking on either side connecting to rafters.

Top chord of floor joist connected to top plate of stud wall to support intermediate flooring HYSPAN LVL beam used to create cantilever.

Timber columns integrated into stud walls

Lintels to support load above door opening

SHS beam welded onto steel columns to form structure for kitchen bench.

Primary structure creating cantilever above laundry room. Beams are connected via cleat plates and THK plate.

Plywood sheet bracing used to resist lateral loads.

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The amount of steel ratio is high due to cantilever created, which has resulted in a high structural cost especially in residential construction.

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Timber column

2/90 x 45 F17 KDHW

Secondary Structure Floor Trusses

Supports yellow tongue flooring.

Timber Studs frame

Frames of each internal walls defining every rooms.

Bracing

Solid blocking @ 1800 spacing to strengthen structure

Cross bracing & Plywood bracing to withstand lateral forces

Rafters

190 x 45 MGP10 pine

Steel strip bracings in x

shape taking load in tension only.

Timber Studs frame

3. Internal (non-load bearing) partitions

Non-load bearing brick wall

How do the internal partitions organise the life inside the building ?

Studs Walls

Internal partitions define spaces within the house, and are non load bearing. Different privacy levels can be created based on materiality, height of openings etc.

Fixed

Internal Partitions

Internal walls on ground floor zones different rooms and creates a corridor centrally and therefore dictates circulation paths.

Movable

Doors

The hinge of doors are not installed on to the wall as is done traditionally, instead, it is offset slightly into the door frame, creating an effect that seems as if the door is part of the wall.

Windows/ Louvres

Brick veneer walls is continued on the interior corridor as it ages well compared to plasterboard.

Studs walls form the skeleton of internal partitions . Nogging are placed in between the studs for more support.

Stud walls with openings have timber lintels to transfer structural loads from the top.

The doors in the laundry and the hallway create a barrier between the exterior and the interior. Pivot Doors in the bedrooms are used to separate the upstairs living and provide privacy.

Windows allow view and ventilation through the house.

Adjustable louvres in the conservatory allow air to ventilate the room and also retain heat when needed.

After stud walls are covered with plasterboard lining,, the nonload bearing and load bearing walls become hard to differentiate.

Pivot doors with hinges that swings on an axis which is offset from the wall.

Partition wall Lintel over door openings The difference in Truss depth (530mm vs 340mm) allows heavier Villaboard sheeting to be hung off battens in the conservatory.

Nogging

Internal partitions physically separates bedrooms from the bathroom Brick wall used in interior or cellar to maintain a constant temperature. This is due to the high thermal mass of brickwall compared to plasterboard lining

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Doors provide a threshold as one enters one room to another.

4. Environmental Protections How did the architect approach the design of environmetal protections? Do the elevations express or hide environmental protections?

The Architect design feature for different environmental protections such as water, heat, air and sound. Most of the design is hide by the structure and the internal partitions of the house to not interupt with the facade. Guttes run along the roof to collect the rainwater, going through the downpipes some of them concealed in the building and other on the outside. Sealing startegies are adopt around the doors, windows to avoid moisture on the inside and heat loss, it is usually visiable but minime.

Thermal Insulation

Moisture

Thermal insulation is mainly placed in the exterior walls and roof structure to reduce heat loss through the walls.

Temperature Environmental Protections Wind

Plasterboard & Villaboard Water resistant plasterboard used in normal rooms and the more heavy duty villaboard is used in laundry and conservatory due to higher tensile strength. This is because they are more prone to wear and tear.

Waterproofing

Flashing and Capping used to seal external skin, Sarking used in roof for anti-condensation properties, waterproof membrane placed below slab.

Sound

Box Guter/Downpipes

Rainwater is collected with box gutters taking it to rainwater tanks or storm water system.

Double Glazed windows

Placed in the upstairs bedrooms and on the side of the doors as a passive cooling strategy to allow for cross ventilation.

Acoustic Insulation

Acoustic insulation placed in internal partitions and between intermediate floor joists to absorb noise transfer between floors and rooms.

Box Gutter

Rainwater head Insulation resists heat transfer from sunlight and retains heat in building.

Overflow pop Downpipe

Double glazed windows provides some protection from solar heat Louvres

Acoustic insulation placed between floor joists to reduce sound transfer between floor, and doubles as thermal insulation as well due to air pockets.

Polyethylene membrane is placed under slab to prevent water ingress from below ground.

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Box gutter system connects to rainwater head and downpipe

5. Mechanical and electrical systems Water Supply

Did the architect organise the internal spaces to place mechanical and electrical services afficiently ?

Main Water Grey water

Environmental protections help the inhabitants experience optimal comfort throughout the day by keeping elements out.

Box gutter is placed in between the 2 bedrooms to collect rainwater. This is an attempt to conceal the gutter to provide a more seamless external look.

For example, if an eaves gutter were used instead, it would have disrupted the artistic quality of the external cladding. The ridge capping used were also of a similar colour as the zinc cladding.

Hot Water Sewerage

Essential services

Electricity

Lighting

MANIFOLD

Air conditioning ducts

Wall mounted light

Manifold covering in-slab coils.

HWS

HVAC

LEGEND

Heat Pump

ACFF2

Power Points

Hot Water System

HWS

AC Reverse cycle refrigerant split system

Hot Water

Coil in slab perimeter

Hydronic Hetaing (in floor and panels)

Cold Water M

Manifold

Ventilation/ Exhaust fan (kitchen/ bathrooms)

Coil in Slab Perimeter

Switch

HHW flow and return pipes extend all the way through ground floor ceiling space.

Downpipe connects to rainwater tank.

Waste pipes feed into sewerage system via gravity to the sewer

Switchboard

Rainwater tank

Hydronic pipes

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6. Physical Enclosures systems

Box Gutter

Connects to roof sheeting to remove rainwater..

Do the Physical enclosures express aspects of the building (internal spaces, structure and materiality ?

Roof Sheeting

External Cladding

VM Zinc cladding is used not only to clad roof structure, but is also continued to external walls and eaves. This is to communicate a sense of continuity between the roof and wall. The use of brickwork from the exterior laundry wall into the corridors also attempts to bring a sense of continuity from external to internal space.

VM zinc roof sheetng encloses the top of the house, and diverts rainwater to box gutters.

Brick wall

Brick veneer laid on edge beam of slab.

Enclosure systems Internal Finishes

Windows/ Skylights

Skylights installed onto frame.

Roof sheeting is fixed onto marine plywood, which is fixed onto battens.

Sheet Cladding

Continues from roof sheeting to form seamless look

Villaboard Plasterboard Double glazed windows

Protects house from elements whilst providing views. Air gaps between glass panes also provides better thermal insulation

Skylights

Allows light in yet physically encloses building

Zinc cladding from roof structure to external walls creates a seamless look

Brickwork is continued onto cellar’s internal walls from the external cladding.

Automatic louvres can be opened up and closed off

Brick veneer wall

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