Building Planning & Architecture (CE-304) - Unit 3 Short Notes

UNIT 3: BUILDING PLANNING & ARCHITECTURE

I. Foundations and Substructures

1. Well Foundation

• Structure & Components: A well is a cylindrical, open caisson sunk into the ground by manual or mechanical excavation. Key components:

  • Well curb: Bottom cutting edge (usually steel/wood).

  • Well steining: Masonry built above curb to provide height and weight for sinking.

  • Well shaft: Main cylindrical body.

  • Bottom plug: Concrete plug at base after reaching final depth.

  • Top plug: Concrete cap above well bottom.

  • Sand filling: Inside the well after bottom plug.

• Uses in Building Construction:

  • Deep foundations for heavy structures (bridges, piers, tall buildings).

  • Where bearing strata is at great depth.

  • In sandy/loose soil where piles are difficult.

  • For scour protection in water bodies.

• Drawing & Labeling: Show plan (circle) and elevation with labeled components (curb, steining, shaft, plugs).

2. Open Foundation (Shallow Foundation)

• Constituent Parts & Functions:

  • Footing: Spreads load to soil (isolated, combined, continuous).

  • Column: Transmits load from superstructure to footing.

  • Foundation Beam: Connects footings, provides stability.

  • Plinth: Raised platform above ground level, protects from dampness.

  • Plinth Beam: At plinth level, distributes load, acts as a tie.

• Drawing & Explanation: Typical section showing column, footing, plinth beam, and plinth level.

3. Pile Foundation

• Types:

  • Based on Material: Timber, Concrete, Steel.

  • Based on Function: End-bearing (rest on hard stratum), Friction (skin friction), Combination.

  • Based on Construction: Precast (driven), Cast-in-situ (bored, driven-cast).

• Applications: High-rise buildings, bridges, waterfront structures, weak/compressible soils, uplift forces.

• Drawing & Labeling: Show pile cap, piles (bored/driven), reinforcement details.

4. Grillage Foundation

• Structure & Components: A grid of steel beams (top & bottom flanges) encased in concrete. Used for heavy column loads on moderately firm soil.

  • Top Flange: Distributes load from column.

  • Webs: Provide shear resistance.

  • Bottom Flange: Spreads load over larger area.

  • Concrete Envelope: Protects steel, provides composite action.

• Uses: For columns of industrial buildings, gantry girders, heavy machinery.

• Drawing & Explanation: Cross-section showing I-beam grid within concrete block.

5. Raft Foundation

• Illustration & Important Details:

  • A thick, reinforced concrete slab covering the entire footprint of the structure.

  • Used when soil bearing capacity is very low or loads are heavy/uneven.

  • Key Details for Structural Drawings:

    • Overall plan dimensions.

    • Thickness (uniform or variable).

    • Reinforcement (top & bottom meshes, distribution).

    • Column pedestals (if provided).

    • Beams (if integrated as ribbed raft).

    • Waterproofing details (for basements).

6. Classification and Selection Criteria for Footings

[!TIP] Exam Focus: Be able to sketch and label Well, Open, Grillage, and Raft foundations. Know when to select each type based on load and soil.

II. Building Elements and Components

1. Types of Doors

2. Types of Windows

3. Lintels and Arches

• Purpose: To span openings (doors, windows) and transfer loads from above to the sides (jambs).

• Advantages of Arches over Lintels:

  • Longer spans possible with same material.

  • Compressive strength utilized (stone, brick).

  • Aesthetic appeal.

  • Economical for large spans in masonry.

• Types:

  • Lintels: Wood, Stone, Brick, Steel, R.C.C.

  • Arches: Segmental, Semi-circular, Pointed (Gothic), Flat, Parabolic.

• Illustration: Show elevation of arch with voussoirs, keystone, intrados, extrados, springing line.

4. Types of Roofs

5. Types of Floors

6. Types of Trusses

[!TIP] Exam Focus: Sketch and label at least 3 door/window types, one lintel/arch, one roof/floor type, and two trusses. Know advantages of arches and applications of each.

7. Types of Stairs and Staircases

Safety Considerations:

• Riser: 150-180mm (consistent).

• Tread: 250-300mm (min. 220mm).

• Formula: 2R + T ≈ 600-650 mm (comfortable).

• Headroom: Min. 2.1m.

• Width: Min. 0.9m (residential), 1.1m (public).

• Handrails: Height 0.85-0.9m, continuous.

• Nosing: Projecting edge for safety.

III. Building Regulations and Compliance

1. Building Planning

• Definition: Systematic process of organizing space on a plot to accommodate functional, legal, climatic, and aesthetic requirements for a building.

• Importance: Ensures legal compliance, optimal land use, functionality, safety, ventilation, lighting, and future expansion.

• Process: Site analysis → Zoning compliance → Bubble diagram → Sketch plan → Detailed working drawings → Approval.

2. Classification of Buildings (per NBC)

3. Building Bye-Laws

• Definition: Local regulations governing development on a plot (set by municipality/development authority).

• Key Regulations:

  • Open Area Requirements: Min. % of plot to be left open to sky (for ventilation, light, parking).

  • Setbacks: Mandatory open spaces around building from plot boundaries (front, side, rear). Varies by road width, zone.

  • Floor Area Ratio (FAR):

    • Definition:

$$ \text{FAR} = \frac{\text{Total covered area on all floors}}{\text{Plot area}} $$

    *   **Significance:** Controls **density** and **bulk** of development. Higher FAR = more built-up area.

*   **Ground Coverage:** Max. % of plot that can be covered on **ground floor**.

*   **Height Restrictions:** Max. building height (often in meters or stories).

*   **Parking Requirements:** Min. number of parking slots per built-up area/unit.

• Significance: Ensures orderly growth, infrastructure capacity, sunlight/ventilation to neighbors, fire safety, aesthetic street scenes.

4. National Building Code (NBC)

• Role: Comprehensive, model code for India. Provides minimum standards for design, construction, and maintenance for safety, health, and welfare.

• Key Provisions:

  • Classification of buildings (as above).

  • Fire & Life Safety (requirements, exits, materials).

  • Structural Safety (loads, materials, design practices).

  • Constructional Safety (site safety, excavations).

  • Plumbing & Drainage (water supply, sanitation).

  • Accessibility for differently-abled.

  • Sustainability (energy, materials).

• Significance in Design: Mandatory reference for architects/engineers. Forms basis for local bye-laws and approval process.

5. Land Acquisition

• Process (Simplified):

  1. Notification (preliminary) by government.

  2. Social Impact Assessment (for large projects).

  3. Objections heard.

  4. Declaration of acquisition.

  5. Valuation & compensation (market value + solatium).

  6. Taking possession & title transfer.

• Legal Aspects: Governed by Right to Fair Compensation and Transparency in Land Acquisition, Rehabilitation and Resettlement Act, 2013.

  • Requires consent (70-80% of affected families) for private projects.

  • Social Impact Assessment mandatory.

  • Rehabilitation & Resettlement (R&R) provisions.

• Importance for Development: Enables public infrastructure (roads, rail, utilities), urban expansion, industrial projects. Must balance public purpose with landowner rights.

IV. Architectural Design Theory and Principles

1. Fundamentals of Architecture

• Definition: The art and science of designing and constructing built environments that are functional, safe, and aesthetically pleasing.

• Scope: Encompasses building planning, structural systems, materials, services, sustainability, social context, and visual arts.

• Building Planning: Conceptual organization of spaces on a site. Importance: Efficient land use, functional relationships, compliance, user comfort, cost-effectiveness. Process: Analysis of requirements → Zoning → Bubble diagram → Schematic plan → Development.

2. Elements of Architecture (Functional)

3. Design Principles of Architectural Composition

• Balance: Visual equilibrium.

  • Symmetrical: Formal, stable (e.g., Taj Mahal).

  • Asymmetrical: Dynamic, informal (e.g., modern houses).

• Contrast: Juxtaposition of different elements (light/dark, smooth/rough, large/small) to create interest.

• Unity/Harmony: All parts feel like a coherent whole. Achieved through repetition, rhythm, similarity.

• Rhythm: Repetition or sequence of elements (columns, windows) creating a pattern.

• Emphasis/Focal Point: Area that draws attention (feature wall, entrance, dome).

4. Organising Principles

• Symmetry: Formal balance about an axis.

• Hierarchy: Ordering spaces by importance (grand hall > corridor).

• Axis: Imaginary line organizing elements (formal gardens, building layout).

• Datum: A reference line/plane/volume from which other elements are organized (floor level, ceiling plane).

5. Spatial Concepts

• Space and Mass:

  • Space: Negative, enclosed, defined by walls/planes. Emotional effect: Intimate, vast, oppressive.

  • Mass: Positive, solid form (walls, columns). Emotional effect: Heavy, light, dominant.

  • Geometric Forms: Sphere, cube, cylinder, pyramid – each evokes different feeling (stability, dynamism).

• Positive and Negative Space:

  • Positive Space: The mass of the building itself.

  • Negative Space: The voids around and between buildings (courtyards, gaps, streets).

  • Example: In a courtyard house, the courtyard is negative space defining the positive mass of the surrounding rooms.

• Space Activity and Tolerance Space:

  • Activity Space: Area required for a specific function (kitchen counter, desk).

  • Tolerance Space: Extra space around activity for movement, comfort, and flexibility. Influences room size, furniture layout, user experience.

6. Formal Elements

• Color: Affects mood (warm/cool), highlights, identifies functions.

• Texture: Tactile/visual quality (smooth, rough) – affects light reflection, scale perception.

• Shape/Form: Geometric or organic – defines character.

• Proportion: Relationship between dimensions of parts and whole (e.g., golden ratio).

• Scale: Size of elements relative to human dimensions (human scale vs. monumental).

• Rhythm: (As above) pattern of repetition.

7. Influencing Factors

• Climate: Sun, wind, rain, temperature → orientation, overhangs, ventilation, insulation.

• Site: Topography, vegetation, views, context.

• Culture/Society: Traditions, lifestyle, social structure.

• Technology: Materials, construction methods, services.

• Economics: Budget, cost of materials/labor.

• Function/Purpose: Client's needs, building program.

• Regulations: Building codes, bye-laws.

• Architecture's Role in Protection:

  • From Sun: Orientation, shading devices (chajjas, louvers), deep reveals.

  • From Rain: Sloping roofs, overhangs, drainage, waterproofing.

  • From Wind: Windbreaks, orientation, aerodynamic form, sealed openings.

  • From Cold: Insulation, compact form, solar gain, minimized openings.

V. Architectural Graphics and Documentation

1. Site Plans

• Importance: Shows building's relationship to the site boundaries and context. Crucial for approvals.

• Typical Contents:

  • Boundaries: Plot lines with dimensions.

  • Setbacks: Lines showing required open spaces.

  • Building Footprint: Outline of all covered areas.

  • Services: Water lines, sewer lines, electrical ducts, storm drainage.

  • Access: Driveway, walkways, gates.

  • North Arrow & Scale.

  • Regulatory Info: Plot number, area, FAR, zoning.

  • Existing Features: Trees, contours, adjacent roads.

2. Sketch Plans and Working Drawings

• Sketch Plans: Initial, freehand diagrams exploring concepts, layouts, relationships. Quick, iterative.

• Working Drawings: Detailed, dimensioned, scaled drawings for construction.

  • For Residential: Focus on unit layouts, services, typical details.

  • For Institutional/Commercial: Complex circulation, large spans, detailed services, fire escapes.

• Steps in Preparation:

  1. Program Analysis (room list, sizes, relationships).

  2. Bubble Diagram (functional relationships).

  3. Schematic Sketch Plans (multiple options).

  4. Preliminary Layout (selected option, scaled).

  5. Detailed Floor Plans (all dimensions, notations).

  6. Elevations & Sections.

  7. Detailed Working Drawings (foundation, floor, roof, doors/windows, electrical, plumbing).

3. Presentation Techniques

• Pictorial Drawings: 3D views (isometric, oblique) showing form.

• Perspective Drawing: Realistic 3D view with vanishing points.

• Rendering: Adding color, texture, shade, shadow to drawings for realism.

• Other: Models (physical/digital), photomontages, walkthroughs.

4. One-Point Perspective

• Elements: Horizon Line (eye level), Central Vanishing Point (VP) (on horizon), Picture Plane.

• Construction Method:

  1. Draw Horizon Line and Central VP.

  2. Draw Station Point (eye position).

  3. Draw Ground Line and Picture Plane.

  4. Project lines from VP to define receding edges.

  5. Vertical/horizontal lines remain vertical/horizontal.

• Example: Direct frontal view of a building facade or interior room.

5. Two-Point Perspective

• Elements: Horizon Line, Two Vanishing Points (VP1, VP2) on horizon.

• Construction Method:

  1. Draw Horizon Line and place two VPs (far apart).

  2. Draw Station Point between VPs.

  3. Draw Ground Line and Picture Plane.

  4. All receding edges converge to either VP1 or VP2.

  5. Vertical edges remain vertical.

• Example: Angled view of a building corner or interior space showing two walls receding.

6. Drawing Details for Structural Elements

• Foundation: Show type (isolated, raft), dimensions, reinforcement (bars, spacing), depth, ** PCC bed**.

• Truss: Show all members (top chord, bottom chord, webs), joints (pinned/rigid), support conditions, span & pitch, loading.

• Doors/Windows: Schedule (type, size, material, hardware), elevation, section showing frame, shutter, glazing, lintel above.

• General: Use standard symbols, hatching, notations, scales, title blocks.

VI. Building Services and Utilities

1. Water and Sanitary Systems

• Water Supply (Multi-story):

  • Components: Source (municipal/tank), pumps, overhead tank, distribution pipes (risers, downcomers), sub-meters, fixtures.

  • Layout: Down-feed (from overhead tank by gravity) or Up-feed (pumped from underground tank). Riser in shaft or duct.

• Drainage Systems:

  • Internal: Traps (P, Q, S), waste pipes, soil pipes, vent pipes (for air admittance), stack.

  • External: Inspection chambers, septic tank (if no sewer), effluent pipe, soak pit.

  • Principle: Gravity flow, slope (1:100 for soil, 1:200 for waste), separate systems (soil/waste vs. stormwater).

• Sewerage Systems: Network of sewers (house connection, lateral, sub-main, main) carrying wastewater to treatment plant. Significance: Public health, environmental protection.

• Sanitary Fittings & Fixtures: WC, urinal, wash basin, sink, shower, bathtub, taps. Contribution: Hygiene, comfort, water efficiency (low-flow fixtures).

• Plumbing Systems: Layout of water supply & drainage pipes. Materials: GI, CPVC, HDPE (water); CI, PVC, ABS (drainage). Efficiency: Proper sizing, slope, minimal bends, leak-proof joints.

2. HVAC and Thermal Comfort

• Ventilation:

  • Natural: Windows, ventilators, courtyards, wind catchers. Impact: Fresh air, removes pollutants, passive cooling.

  • Mechanical: Fans, exhaust systems, HVAC. Impact: Controlled, consistent IAQ.

• Lighting:

  • Natural: Windows, skylights, light shelves. Design: Daylight factor, glare control.

  • Artificial: LED, CFL. Design: Luminaries, task/ambient lighting, controls (sensors, dimmers).

• Air Conditioning:

  • Fundamentals: Refrigeration cycle (evaporator, compressor, condenser, expansion valve). Controls temperature, humidity, air movement.

  • Significance for Smart Buildings: Integrated with BMS (Building Management System) for energy optimization, zone control, remote monitoring.

• Thermal Insulation:

  • Specifications: R-value (thermal resistance), U-value (transmittance). Reduces heat gain/loss.

  • Materials: Expanded Polystyrene (EPS), Extruded Polystyrene (XPS), Glass Wool, Rock Wool, Polyurethane Foam, Reflective Insulation (aluminum foil).

3. Vertical Transportation

• Elevators:

  • Standards: Capacity (kg/persons), Speed (m/s), Belt & Safety devices, Fire-rated shafts, Machine Room Less (MRL).

  • Uses in High-rise: Primary vertical transport. Grouping by zones (express/local). Destination dispatch systems for efficiency.

• Escalators:

  • Standards: Inclination (30°-35°), Step width (600-1000mm), Safety brushes, Comb plates.

  • Uses: High-traffic areas (malls, airports, metro stations) for continuous movement.

4. Safety and Security

• Fire-Fighting Systems:

  • Suppression Methods: Wet riser (charged with water), Dry riser (air, filled by fire dept.), Sprinklers (automatic), Hose reels, Fire extinguishers (CO2, foam, dry powder).

  • Safety Standards: NBC Part 4. Fire compartments, travel distance, number & width of exits, fire resistance rating of materials, smoke control.

  • Importance in Commercial: High occupancy, complex layouts, valuable assets, business continuity.

• Security Systems:

  • Types: CCTV (surveillance), Access Control (biometric, card), Intrusion Detection (motion sensors, glass break), Perimeter Security (fencing, gates).

  • Enhancement: Deters crime, monitors activity, controls access, provides evidence, integrates with fire/alarm systems.

5. Specialized Aspects

• Acoustics of Buildings:

  • Factors Affecting: Source (noise level), Path (transmission through walls, floors), Receiver (sensitivity).

  • Design Considerations: Sound insulation (mass, decoupling), absorption (acoustic panels, perforated ceilings), room shape (avoid parallel walls), background noise control (HVAC).

• Energy-Efficient Buildings:

  • Concept: Minimize energy consumption for heating, cooling, lighting, appliances.

  • Practices:

    • Passive Design: Orientation, insulation, thermal mass, shading, natural ventilation/daylighting.

    • Active Systems: High-efficiency HVAC, LED lighting, renewable energy (solar PV).

    • Materials: High-performance glazing, insulated walls/roofs.

• Intelligent Buildings:

  • Features: Integrated systems (HVAC, lighting, security, fire, ICT) controlled by a Central BMS. Convenience, energy efficiency, safety, flexibility.

• Pollution Control:

  • Indoor: Ventilation, low-VOC materials, air filtration, source control.

  • Outdoor: Buffer zones, landscaping, dust suppression during construction, waste management.

• Protection from Climate:

  • Design Strategies: Climate-responsive design (as in IV.7). Use of verandahs, deep overhangs, insulation, appropriate materials (high thermal mass in hot-dry, lightweight in hot-humid).

VII. Town Planning and Urban Design

1. Fundamentals

• Town Planning: Scientific and aesthetic organization of land uses and infrastructure for physical, economic, and social well-being of a community.

• Objectives: Healthy environment, efficient transportation, economic growth, social equity, aesthetic quality, efficient land use, disaster resilience.

2. Principles of Town Planning

• Garden City (Howard): Self-contained towns with greenbelts, balanced land uses (residential, industry, agriculture).

• Neighbourhood Unit (Perry): Self-sufficient community unit (~5000-9000 people) with schools, parks, local shops within walking distance, bounded by arterial roads.

• Other Principles: Compact City, Transit-Oriented Development (TOD), Mixed-use Development, Sustainable Urban Drainage Systems (SUDS).

3. Urban Plans

• Master Plan:

  • Key Features: Long-term (20-30 yrs), comprehensive land-use plan for entire city/region. Shows zones (residential, commercial, industrial), transport network, infrastructure corridors, open spaces, growth boundaries.

  • Preparation: Data collection (population, land, traffic), forecasting, alternative strategies, public consultation, finalization.

  • Significance: Statutory framework for development control, guides investment, prevents haphazard growth.

• Structure Plan:

  • Features: Strategic framework for a large area (sector, corridor). Less detailed than master plan. Focuses on major infrastructure, transport links, key land uses, environmental constraints.

  • Role: Implements master plan policies at a sub-city scale, guides local area plans.

4. Development Controls

• Planning Standards:

  • Density Distribution: Gross Density (persons/hectare for entire zone), Net Density (persons/hectare for residential land only). Guides zoning.

  • Density Zones: Low, Medium, High density residential/commercial zones with specific FAR, ground coverage, height limits.

• Traffic Network Planning:

  • Standards: Hierarchical system (expressways, arterials, sub-arterials, collectors, local streets).

  • Road Widths: Based on traffic volume, ROW (Right of Way), function (e.g., 60m for arterial, 12m for local).

  • Pedestrian Paths: Min. 2m width, continuous, barrier-free.

  • Intersections: Grade-separated (flyovers) or at-grade (roundabouts, signals).

• Urban-scale Regulations: FAR, setbacks, open space ratio, parking norms – applied at city/zone level to control overall bulk and infrastructure load.

5. Urban Issues and Legislation

• Slums:

  • Causes: Rural-urban migration, poverty, lack of affordable housing, unemployment, poor governance.

  • Methods of Clearance & Rehabilitation:

    • Clearance & Relocation: Eviction, shifting to periphery (often poorly executed).

    • In-situ Upgrading: Improve existing slum (infrastructure, services, tenure security).

    • Slum Redevelopment: Rebuild with mixed-income housing, public-private partnership (PPP).

• Municipal Acts:

  • Role: Legal framework for urban local bodies (municipal corporations/councils). Define powers, functions, revenue sources, duties (water, sanitation, roads, taxes).

  • Necessity for Legislation: Provides authority for planning, regulation of development, provision of services, collection of taxes, enforcement of bye-laws. Without it, planning is advisory and unenforceable.

• Role of Architecture in Urban Environmental Protection:

  • Design energy-efficient buildings to reduce urban heat island & energy demand.

  • Use sustainable materials, waste reduction.

  • Create human-scale, walkable environments to reduce vehicle dependency.

  • Integrate green infrastructure (rooftop gardens, urban forests) for air quality, stormwater management.

  • Promote adaptive reuse of existing buildings to reduce sprawl.

[!TIP] Exam Focus: Know NBC classification, FAR formula, difference between Master & Structure Plan, principles of Garden City/Neighbourhood Unit, slum causes/rehabilitation methods. Be ready to explain significance of bye-laws, FAR, and architecture's role in climate protection.