wt5912 unit5 week7
DESCRIPTION
Lecture Week 7TRANSCRIPT
Department of Design & Manufacturing TechnologyLecturer/Teacher: Mr. Joseph Lyster Academic Year 2011: Spring SemesterTechnical Support: Mr. Joe Murray & Mr. Richie Hennessy
Notes prepared by: Mr. Joseph Lyster
WT5912TECHNOLOGY EDUCATION & WORKSHOP PRACTICE 2: MATERIALS AND CONSTRUCTIONUnit 5 – Week 7 Planning Permission to Subfloor Construction
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WT5912
Cork Rural Design Guide
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WT5912
Site Selection:
Check the development plan
Reading the landscape
Choosing where to build
Assessing a site’s potential
Linking with the land
Summary & Checklist
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Check the development plan
Check with County Council/Local Authorities planning policies & procedures
Policies restricting/permitting development in certain areas e.g. Greenbelt, Coastal Areas, Rural Housing Control Zone etc. Scenic Amenity Maps - scenic routes and scenic landscapes; Heritage maps - Natural Heritage Areas (NHA), Special Protection Areas (SPA) and
candidate Special Area of Conservation (SAC) and Areas of Geological Interest; Landscape Character Maps; Archaeology policies, the Record of Protected Structures and conservation
policies.
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Reading the landscape
Lowland Valleys
Mountains
Fertile Plain
Fissured Marginal and ForestedRolling Upland
River and Reservoir Valleys
Ridged, Peaked & ForestedUpland
Indented Estuarine Coast & BroadBay Coast
Headlands
Coastal Islands
Coastal Islands
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Choosing where to build
X
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WT5912
Assessing a site’s potential
X
X
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WT5912
Linking with the land
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WT5912
Linking with the land
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WT5912
Linking with the land
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WT5912
Dwelling Orientation
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Dwelling Orientation
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Dwelling Orientation
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WT5912
Dwelling Orientation
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Dwelling Orientation
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WT5912
Dwelling Orientation
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WT5912
Site Boundaries
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Site Boundaries
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Internal Plan
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Internal Plan
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Types of Planning Permission
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Documents Required
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Department of Design & Manufacturing Technology
WT5912
Site Map
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Procedures
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Patterns for Rural Development
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Planning Checklist
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WT5912
Site Notice
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WT5912
Trial Hole: 1m² x 1.5m Deep
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Site Level and Profiling
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Site Level and Profiling
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Profiling/Setting Out
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Majority of buildings Continuous strip Reinforced concrete Rests on the soil Depth and Width
Soil type and building load
Strip Foundation
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Traditional Strip foundation Most commonly used Usual 1050 X 350mm Suitable for –
Average – Good bearing capacity soils
Not suitable for – Very soft clays Silt Peat Badly made – up - ground
Strip Foundation
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WT5912
Stepped Strip foundation Sloping sites Reduce excavation Step depths
112mm or 225mm Overlap of concrete
Minimum 300mm Not less than depth
of concrete foundation
Strip Foundation
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WT5912
Wide Strip foundation Not common Reinforced
Transverse reinforcement Resist tensions
Wider than 900mm Suitable for –
Ground with low bearing capacity Expensive
Strip Foundation
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WT5912
Deep Strip foundation
Rests on suitable strata
Excavate 900mm or more
Trench filled within 150mm of ground level
Width depends on depth
Deep Foundation
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Raft foundation Suitable for –
Low load bearing soils Soft natural ground
Very soft clays Silt Peat
Made – up – ground Average – Good bearing capacity soils instead of strip
foundations
Raft Foundation
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WT5912
Raft foundation
Concrete slab Reinforced slab Up to 300mm thick Whole building area Pavement All Loads transmitted Slab thicker under load bearing walls
Raft Foundation
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Carry and transfer loads Subsoils of poor bearing capacity Deeper soil and rock of a high bearing capacity Avoids excessive excavation
Plan of pile positions
Pile Foundation
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Made from Wood Steel Concrete
Placed in ground Driven Drilled Jacked
Pile Foundation
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Equipment To clear site
Hymac’s JCB’s
To remove / move materials Tractors Trailers Dumpers
Heavy Machinery
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Images courtesy of: Mr John Joyce
Site Entrance
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1050 mm bucket
External – cavity leaf wall foundations
350 mm bucket
Internal – single leaf wall foundations
Large bucket
Used to clear site’s topsoil
Images courtesy of: Mr John Joyce
Site Clearance
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Perimeter trenches dug with 1050 mm bucket Internal trenches dug with 350 mm bucket
Images courtesy of: Mr John Joyce
Site Clearance/Excavation
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Open Timbering
Close Timbering
Excavation
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Excavation
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Mild steel bars Provide tensile strength
Min. 25mm from surface Prevents rusting Adequate depth to support
Spacers Position reinforcing bars Provide the necessary cover
Images courtesy of: Mr John Joyce
Excavation/Foundation Preparation
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Cement trucks pull in on site Concrete poured directly into trench Filled up level with tops of pegs Levelled roughly with shovels
Top of wooden peg to which the foundation will be levelled to
Images courtesy of: Mr John Joyce
Laying Foundation
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Tapered off level with tamping board
Images courtesy of: Mr John Joyce
Laying Foundation
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Images courtesy of: Mr John Joyce
Laying Foundation
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Images courtesy of: Mr John Joyce
Foot/Rising Walls
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Images courtesy of: Mr John Joyce
Foot/Rising Walls
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WT5912
Images courtesy of: Mr John Joyce
Foot/Rising Walls
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WT5912
Images courtesy of: Mr John Joyce
Foot/Rising WallsProvision for Services
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Images courtesy of: Mr John Joyce
Foot/Rising WallsHard-core fill
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Images courtesy of: Mr John Joyce
Foot/Rising WallsRadon/DPC/Insulation
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Images courtesy of: Mr John Joyce
Foot/Rising WallsPlumbing
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Subfloor
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Images courtesy of: Mr John Joyce
External Walls