Building Planning & Architecture (CE-304) - Unit 2 Short Notes

1. FOUNDATIONS AND SUBSTRUCTURES

Foundation: The lowest part of a structure that transfers loads to the underlying soil/rock.

Types of Foundations (with diagrams)

[!TIP] Exam Focus: Distinguish well caisson (sunk by excavation, manual/machine) vs. pile (driven/bored). Raft foundation is a type of mat foundation.

Functions & Selection Criteria

• Primary Function: Transfer structural loads safely to ground without excessive settlement.

• Selection Based On:

  • Load (magnitude, type)

  • Soil Bearing Capacity (determined by soil investigation)

  • Groundwater Table (affects construction method)

  • Adjacent Structures (need for underpinning)

  • Cost & Time

2. BUILDING REGULATIONS AND CLASSIFICATIONS

National Building Code (NBC) Classifications

Buildings classified by Group (occupancy) and Sub-group. Examples:

[!TIP] Key NBC Provisions: Fire safety (exits, travel distance), structural safety (loads, materials), plumbing, accessibility, occupancy limits.

Building Bye-Laws & Development Controls

• Setbacks: Minimum open spaces around building perimeter.

  • Purpose: Light, ventilation, privacy, fire truck access, parking.

• Floor Area Ratio (FAR) / Floor Space Index (FSI):

  • Definition: Ratio of total covered area on all floors to the plot area.

  • Formula:

$$\boxed{FAR = \frac{\text{Total Covered Area on all Floors}}{\text{Area of Plot}}}$$

*   **Significance:** Controls density. Higher FAR = more built-up area allowed.

• Open Area Requirements: Minimum % of plot to be left open (for parking, landscaping, ventilation). Ensures urban quality.

Land Acquisition

• Process: Notification → Declaration → Acquisition → Compensation (as per Right to Fair Compensation Act).

• Necessity: For public infrastructure (roads, schools, hospitals), urban redevelopment.

• Legal Aspects: Government authority, due process, fair compensation, social impact assessment.

3. ARCHITECTURAL DESIGN THEORY AND PRINCIPLES

Fundamental Elements of Architecture (Based on Function)

Principles of Architectural Composition

• Balance: Distribution of visual weight.

  • Symmetrical: Formal, stable (Taj Mahal).

  • Asymmetrical: Dynamic, informal (modern houses).

• Contrast: Juxtaposition of different elements (light/dark, smooth/rough, old/new).

• Unity/Harmony: All parts relate to whole. Achieved by repetition, rhythm.

• Rhythm: Repetition with variation (columns, windows).

• Proportion & Scale:

  • Proportion: Relationship between parts/sizes (Golden Ratio, Modulor).

  • Scale: Size relative to human being (Human Scale is critical for comfort).

• Hierarchy: Organization of spaces by importance (grand entrance vs. service areas).

Concepts of Architectural Space

• Positive Space: Defined by enclosing elements (rooms, courts).

• Negative Space: The space around and between positive forms (corridors, gaps between buildings).

• Space Activity: Functional requirements of a space (size, shape for specific activity).

• Tolerance Space: Buffer zones for movement, services, future change.

• Space and Mass: Space is the void; mass is the solid. Their interplay defines form.

  • Geometric Forms: Cube (stability), Sphere (unity), Pyramid (aspiration), Cylinder (continuity).

[!TIP] Common Pitfall: Confusing Scale (human relation) with Proportion (part-to-part relationship).

Factors Influencing Architectural Development

Climate (orientation, shading), Culture (beliefs, traditions), Technology (materials, construction), Materials (local availability), Economics (budget), Client Needs (program).

Role of Design Elements

• Color: Mood, perception of space (warm/cool), highlights.

• Texture: Tactile/visual quality (smooth/rough), light reflection.

• Shape/Form: Geometric/organic, defines character and function.

4. TOWN PLANNING AND URBAN DEVELOPMENT

Objectives & Fundamentals

• Health: Sanitation, green spaces, pollution control.

• Convenience: Efficient circulation, zonal land use, utilities.

• Beauty: Aesthetics, landmarks, vistas.

• Efficiency: Optimal land use, infrastructure cost.

Planning Documents & Concepts

Infrastructure & Network Planning

• Traffic Network Planning: Hierarchical road system (arterial, sub-arterial, collector, local). Standards for width, gradient, parking, pedestrian paths, cycle tracks.

Urban Issues & Legislation

• Causes of Slums: Rural-urban migration, poverty, unemployment, inadequate low-cost housing, poor planning.

• Methods of Slum Clearance:

  • Redevelopment: Clear and rebuild with improved infrastructure.

  • Relocation: Shift to peripheral sites with basic amenities.

  • In-situ Upgradation: Improve existing slums (water, sanitation, roads).

• Municipal Acts: Provide legal framework for planning, taxation, service delivery, building regulations (e.g., Indian Municipal Corporation Act). Necessary for orderly development and enforcement.

5. BUILDING SERVICES AND UTILITIES

Overview

Building Services: Integrated systems (mechanical, electrical, plumbing) essential for functionality, safety, comfort.

Essential Services Systems

• Fire-Fighting Systems:

  • Suppression Methods: Water (sprinklers, hydrants), foam, CO₂, inert gases.

  • Commercial Buildings: Wet riser, automatic sprinkler system, fire alarm, smoke detection, compartmentalization.

  • Standards: NBC Part 4, NFPA codes.

• Vertical Transportation:

  • Elevators: Traction (geared/gearless) for mid/high-rise; Hydraulic for low-rise. Standards: capacity (630-1600 kg), speed (0.5-10 m/s), number based on population.

  • Escalators: Moving stairs for high-traffic areas (malls, airports). Angle ~30°, speed ~0.5 m/s.

• Water Supply System (Multi-story):

  • Components: Source, pumping, overhead/underground tanks, distribution pipes, fixtures.

  • Layout: Risers (vertical), mains (horizontal), branches. Pressure boosting (hydro-pneumatic) for upper floors.

  • DiagramCANVAS: Schematic showing overhead tank, main riser, branch lines to flats, pumping arrangement.

• Drainage & Sewerage Systems:

  • Internal: Soil, waste, vent pipes. Gradient (1:40 to 1:100), traps, inspection chambers.

  • External: Sewers, manholes, connection to municipal line.

  • Principle: Gravity flow, separate storm/sanitary.

  • DiagramCANVAS: Simple building section showing internal drain pipes from fixtures to main stack, vent pipe, connection to external sewer.

• Sanitary Fittings & Fixtures: WC, basins, sinks, showers. Materials: vitreous china, stainless steel. Contribution to Hygiene: Smooth surfaces (easy clean), proper drainage, water conservation (low-flow fixtures).

Environmental Control Systems

• Ventilation: Natural (windows, vents, courtyards) vs. Mechanical (fans, AHUs). Impact: Indoor air quality, moisture control, thermal comfort.

• Lighting: Natural (daylighting, windows) vs. Artificial (LEDs). Impact: Visual comfort, productivity, energy use.

• Air Conditioning: Central (chillers, AHUs) vs. split/VRF. Significance for Smart Buildings: Integrated with BMS for energy optimization, zone control.

• Acoustics of Buildings:

  • Factors: Sound absorption (materials), reflection (echo), insulation (STC), background noise.

  • Design: Room shape, surface treatments, acoustic barriers, vibration isolation.

Safety & Security Systems

• Types: CCTV, access control, burglar alarms, fire alarm, PA systems.

• Role: Deterrence, detection, response, asset protection, life safety.

6. ARCHITECTURAL GRAPHICS AND DOCUMENTATION

Types of Architectural Drawings

• Site Plan: Shows building location, boundaries, contours, access roads, utilities, landscaping. Importance: Context, legal compliance (setbacks), construction layout.

• Sketch Plans: Preliminary, freehand, explore concepts, massing, circulation.

• Working Drawings: Detailed construction documents (plans, elevations, sections, details). Steps: Concept → Schematic → Design development → Working drawings (coordination with structural, services engineers).

Presentation & Representation Techniques

• Pictorial Drawings: Isometric, axonometric (show 3D on 2D, no perspective).

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

  • One-Point Perspective:

    • Elements: One Vanishing Point (VP) on horizon line. Parallel lines recede to VP. Front face is true shape.

    • Use: Interiors, streets, long corridors (one dominant direction).

    • DiagramSEARCH: "one point perspective room example"

  • Two-Point Perspective:

    • Elements: Two VPs on horizon line. No face is parallel to picture plane. More dynamic.

    • Use: Building exteriors, complex interiors (multiple angles).

    • DiagramSEARCH: "two point perspective building corner"

• Rendering: Adding color, texture, shade, shadows for realism.

Drawing Specific Elements

• Trusses: Show members (top/bottom chord, webs), joints (pinned/fixed), dimensions (span, pitch), loads. Use standard symbols.

• Structural Details: Sections through connections, foundations, lintels with dimensions, material specs.

7. BUILDING COMPONENTS AND STRUCTURAL SYSTEMS

Doors and Windows

• Types of Doors (by material/location):

  • Wooden: Panelled, flush, louvered.

  • Metal: Steel, aluminum (commercial).

  • Glass: Sliding, pivot.

  • Special: Fire-rated, rolling shutters, soundproof.

• Door Frames: Types: Plaster stop, rebated, double rebated. Construction: Wood/Metal with stop to hold door leaf.

Stairs and Staircases

• Types (with diagrams):

  • Straight: Single flight, changes direction at landing.

  • L-Shaped: 90° turn, single landing.

  • U-Shaped (Dogleg): 180° turn, two flights parallel.

  • Spiral/Circular: Around central newel/post.

  • Winder: Pie-shaped treads at turn.

  • Helical: Continuous curve, no central post.

• Design Considerations:

  • Rise (R): 150-180 mm (comfortable).

  • Tread (T): 250-300 mm.

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

  • Safety: Handrails (height 850-1000 mm), non-slip treads, adequate width.

Structural Elements

• Lintels & Arches:

  • Purpose: Carry load over openings (doors/windows).

  • Lintel: Horizontal beam (RCC, steel, wood). Simple, economical for small spans.

  • Arch: Curved structure. Advantages: Longer spans, aesthetic, compressive strength (masonry).

  • Types: Segmental, semicircular, parabolic, flat.

  • DiagramCANVAS: Labeled diagram of lintel (beam over opening) and arch (voussoirs, keystone, abutment).

• Trusses:

  • Purpose: Long span roofs, bridges. Efficient use of material (triangular units).

  • Types: King post, queen post, fink, scissor, sawhorse.

  • Advantages: Lightweight, spans >10m, good load distribution.

  • Drawing Representation: Show all members, joints, dimensions, pitch.

• Roofs:

  • Pitched/Sloped: Gable, hip, lean-to. For drainage.

  • Flat: Slight slope (1:80), for large spans, RCC.

  • Shell: Thin curved concrete (hyperbolic paraboloid, dome).

  • Trussed: Supported on trusses.

• Floors:

  • Timber: Joists, planking (old buildings).

  • RCC: Slab on beams/columns (common).

  • Composite: Steel deck + concrete.

  • Floating: Over existing (renovation).

8. SUSTAINABLE AND SMART BUILDING PRACTICES

Energy-Efficient Buildings

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

• Importance: Reduce operational cost, carbon footprint, resource depletion.

• Practices:

  • Design: Optimal orientation (N-S in India), shading devices, thermal mass, natural ventilation.

  • Materials: High insulation, reflective roofs, low-emissivity glass.

  • Systems: Efficient HVAC (VRF, geothermal), LED lighting, energy recovery ventilators.

  • Renewables: Solar PV, solar water heating.

Thermal Insulation

• Specifications: R-value (thermal resistance) or U-value (thermal transmittance, U = 1/R). Lower U-value = better insulation.

• Materials:

  • Bulk: Glass wool, rock wool, expanded polystyrene (EPS).

  • Reflective: Aluminum foil, radiant barriers.

  • Insulating Concrete Forms (ICFs): Polystyrene blocks filled with concrete.

Intelligent/Smart Buildings

• Features: Integrated Building Management System (BMS) controlling HVAC, lighting, security, fire, elevators via sensors/automation.

• Benefits: Energy optimization, occupant comfort, predictive maintenance, security.

Environmental Protection Aspects

• Pollution Control: Rainwater harvesting, sewage treatment (STP), solid waste management (segregation), low-VOC materials.

• Protection from Climate/Environmental Elements:

  • Architectural Role: Site planning (wind, sun), shading (overhangs, fins), insulation, waterproofing, durable materials (corrosion-resistant), landscaping (microclimate).

[!TIP] Exam Link: Energy efficiency often links to orientation and insulation materials. Smart buildings emphasize BMS integration.