Building Planning & Architecture (CE-304) - Unit 5 Short Notes

UNIT 5: Building Planning & Architecture

I. Structural Foundations & Building Elements

Foundations

• Well foundation: Cylindrical well sunk by excavation, lined with masonry. Used for deep foundations in soft soil, bridges, heavy structures.

  Diagram:

  DiagramSEARCH: well foundation diagram construction showing well steining, curb, sinking

• Open foundation: Shallow foundation, excavated and built up.

  Constituent parts: Footing, column base, plinth.

  Functions: Distribute load, prevent settlement.

  Drawing:

  DiagramSEARCH: open foundation footing parts labeled

• Pile foundation: Deep foundation transferring load to stratum.

  Types: End-bearing, friction, combined.

  Uses: Weak soil, high loads, waterfront structures.

• Grillage foundation: Steel beams in tiers (top & bottom) connected by rods. Used for heavy column loads.

  Diagram:

  DiagramSEARCH: grillage foundation steel beams arrangement

• Raft foundation: Thick reinforced concrete slab covering entire area. For poor soil, heavy loads.

  Details on drawings: Thickness, reinforcement layout, column pedestals.

  Illustration:

  DiagramSEARCH: raft foundation plan section detail

Building Elements & Components

• Doors

  Types: Panel, flush, sliding, revolving, louvered.

  Frames: Chowkhat (wood, steel, PVC), with stops and architraves.

  Sketch:

  DiagramSEARCH: door types and frames architectural sketches

• Windows

  Types: Casement, sliding, fixed, skylight, clerestory. Functions: light, ventilation, view.

• Lintels and Arches

  Purpose: Support masonry above openings.

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

  Arches: Curved, distribute load as thrust, allow larger spans, aesthetic.

  Advantages of arches: Longer spans, decorative, efficient load distribution.

  Illustration:

  DiagramSEARCH: lintel vs arch structural comparison

• Roofs

  Types: Flat (slope <10°), pitched (gable, hip, gambrel), shell, dome. Selection based on climate, material, span.

• Floors

  Types: Solid (concrete, stone), suspended (joists, beams), floating (insulated). Materials: concrete, wood, tiles.

• Trusses

  Types: King post, queen post, fink, scissor, trussed rafter.

  Advantages: Long spans, lightweight, efficient material use, aesthetic.

  Drawing structural details: Show members (top chord, bottom chord, webs), joints, pitch, support.

  Diagram:

  DiagramSEARCH: roof truss types king post queen post fink

• Stairs and Staircases

  Types: Straight, L-shaped, U-shaped, spiral, helical, winder.

  Comparison: Straight (simple, space-consuming), spiral (compact, less comfortable), helical (curved, aesthetic).

  Labeled diagram: Show steps, riser, tread, landing, newel, handrail.

  Diagram:

  DiagramSEARCH: stair types straight spiral helical labeled

II. Building Regulations & Standards

National Building Code (NBC)

• Classifications of buildings (with examples):

  | Group | Type | Examples | |-------|------|----------| | A | Residential | Detached houses, apartments (1-4 families) | | B | Educational | Schools, colleges, libraries | | C | Institutional | Hospitals, orphanages, prisons | | D | Assembly | Theaters, stadiums, places of worship | | E | Business | Offices, banks, courts | | F | Mercantile | Shops, markets, department stores | | G | Industrial | Factories, workshops, warehouses (non-hazardous) | | H | Storage | Warehouses, cold storage, depots | | J | Hazardous | Chemical plants, explosives storage |

• Key provisions: Occupancy classification, construction types (Type I-V), fire safety (exits, compartments), accessibility (ramps, lifts), structural safety (loads, materials).

Building Bye-laws

• Open area requirements: Minimum % of plot left open (e.g., 25-30%). Ensures light, ventilation, reduces crowding.

• Setbacks: Minimum distance from plot boundary to building.

  Importance: Fire safety (access for fire tenders), privacy, sunlight, road widening.

• Floor Area Ratio (FAR):

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

Significance: Controls density, infrastructure load (water, sewage, roads). Higher FAR = more built-up area.

Land Acquisition

• Process: Notification → Survey → Valuation → Compensation → Possession.

  Importance: Enables public projects (roads, schools), urban development, infrastructure.

III. Architectural Design Principles

Elements of Architecture (Functional Aspects)

• Pragmatic utility: Basic function (shelter, workspace).

• Circulatory function: Movement patterns (corridors, stairs, entrances).

• Symbolic function: Cultural/religious meaning (temples, government buildings).

• Physiological function: Comfort (light, air, temperature, acoustics).

Physical Structure vs Perceptual Structure

• Physical structure: Tangible materials, form, construction.

• Perceptual structure: User experience (scale, light, spatial sequence). Impacts emotional response and usability.

Principles of Architectural Composition

• Balance: Symmetrical (formal, stable) or asymmetrical (dynamic, interesting).

• Contrast: Light/dark, smooth/rough, large/small, warm/cool colors.

• Unity: Harmonious whole through repetition, consistency.

• Proportion: Mathematical ratios (golden section, modular) for pleasing relationships.

• Scale: Relative size to human or context (monumental vs intimate).

• Rhythm: Repetition, progression, alternation of elements (columns, windows).

• Symmetry: Mirror image, formality, order.

• Hierarchy: Emphasis on important spaces (grand entrance, central atrium).

Architectural Space & Form

• Positive vs negative space:

  Positive: Occupied by building mass.

  Negative: Voids (courtyards, gaps, openings). Example: Taj Mahal’s dome (positive) vs garden (negative).

• Space activity and tolerance space:

  Activity space: Minimum area for function (e.g., kitchen work triangle).

  Tolerance space: Flexibility for changes (movable partitions, adaptable furniture).

• Space and mass relationships: Visual weight (heavy/light), emotional effects (enclosing vs open). Geometric forms (cube, sphere, pyramid) influence perception.

Factors Influencing Architectural Development

• Climate: Orientation, insulation, shading (verandahs in hot climates).

• Culture: Traditions, beliefs (Hindu temple mandala, Islamic courtyards).

• Technology: New materials (steel, glass), methods (prefabrication, CAD).

• Materials: Local availability (stone, wood, brick) affects form and technique.

• Social needs: Family structure, accessibility (elder-friendly, child-safe).

• Color, texture, shape:

  Color: Psychology (blue calm, red energetic), cultural significance.

  Texture: Tactile/visual interest (rough stone vs smooth glass).

  Shape/Form: Geometric (modern) vs organic (organic architecture).

IV. Building Services & Systems

Fire-Fighting Systems

• Key elements: Detection (smoke/heat sensors), alarms, extinguishers (CO₂, dry powder, foam), sprinklers, fire escapes, compartmentalization (fire walls).

• Fire suppression methods:

  Water (sprinklers, hydrants),

  Gas (inert gas, clean agents),

  Foam (for flammable liquids).

• Safety standards: NBC, NFPA, IS codes.

  Importance: Life safety, property protection, continuity of operations.

Vertical Transportation Systems

• Elevators:

  Types: Passenger, freight, hospital, service.

  Standards: Capacity (8-20 persons), speed (0.5-6 m/s), car size, door operation.

  Uses in high-rise: Efficient vertical movement, evacuation, accessibility (bed elevators).

• Escalators: Moving stairs for high traffic (malls, airports).

  Standards: Inclination 30°, width 600-1000 mm, speed 0.5-0.75 m/s.

Plumbing & Drainage Systems

• Water supply system:

  Components: Source (municipal, borewell), pumps, overhead/underground tanks, distribution pipes (riser, branch).

  Layout for multi-story: Zoning (separate zones for upper/lower floors), pressure boosting, gravity flow from overhead tank.

• Internal drainage: Soil, waste, vent pipes; traps (P, Q, S); floor drains.

  External drainage: Sewers, manholes, inspection chambers, gradient (1:100 to 1:500).

  Basic diagram:

  DiagramSEARCH: building drainage system internal external layout

• Sanitary fittings and fixtures:

  Types: Water closets (Indian, European), basins, urinals, taps, showers.

  Contribution: Hygiene (easy cleaning, water efficiency), comfort (ergonomic design).

• Fundamentals: Efficient distribution (proper sizing, pressure, leak-proof), waste disposal (trap seal, venting).

Other Building Services

• Security systems: CCTV, access control (biometric, card), alarms, security personnel.

  Importance: Deter crime, monitor activities, protect assets.

• Acoustics of buildings:

  Factors: Absorption (materials), reflection (surfaces), isolation (walls, floors), background noise.

  Design considerations: Room shape, diffusers, absorptive materials (acoustic tiles, carpets).

• Thermal insulation:

  Specifications: R-value (resistance), U-value (transmittance).

  Materials: Fiberglass, mineral wool, expanded polystyrene, vermiculite, aerated concrete blocks.

• HVAC and Ventilation:

  Fundamentals of AC: Cooling/heating, humidity control, air filtration.

  Significance for smart buildings: Automated control, energy efficiency, occupant comfort.

  Effective ventilation & lighting: Natural (windows, atriums, wind catchers) vs mechanical. Impact on indoor air quality (IAQ), productivity, health.

V. Urban & Town Planning

Planning Concepts & Documents

• Master plan: Comprehensive, long-term (20-30 years), covers entire region, land use, transportation, utilities.

  Features: Vision, policies, implementation strategies.

• Structure plan: Detailed, for specific areas (sectors, neighborhoods), zoning, road network, amenities.

  Key features: Land use distribution, infrastructure phasing.

Planning Standards

• Density distribution and density zones:

  Persons per hectare (pph).

  Zones: High density (>500 pph), Medium (200-500 pph), Low (<200 pph).

  Standards: Based on infrastructure capacity (water, sewage, roads).

• Traffic network planning:

  Standards for roads: Hierarchy (expressway, arterial, collector, local), widths (e.g., arterial 60m, local 15m).

  Paths: Footpaths (min 2m), cycle tracks, pedestrian zones.

Urban Issues & Legislation

• Slums:

  Causes: Poverty, rural-urban migration, unemployment, inadequate housing.

  Methods of slum clearance: Relocation (to new sites), in-situ upgrading (improve existing), rehabilitation (with compensation).

• Municipal acts and town planning legislation:

  Necessity: Legal framework for development control, zoning, building regulations, public health, infrastructure provision. Examples: Municipal Corporation Act, Town and Country Planning Acts.

VI. Sustainability & Environmental Integration

Energy-Efficient Buildings

• Concept: Reduce energy consumption via design, materials, systems.

• Practices: Passive solar design (orientation, shading), insulation, efficient lighting (LED), renewable energy (solar PV, wind), rainwater harvesting, energy-efficient appliances.

• Energy-efficient materials: Low-embodied energy (bamboo, recycled steel), high insulation (aerated autoclaved concrete, structural insulated panels).

Intelligent Buildings

• Features: Building automation (HVAC, lighting, security), IoT sensors, energy management systems, user-friendly interfaces, sustainability monitoring.

• Fundamentals: Integrated systems, data-driven control, adaptability, occupant comfort.

Pollution Control Aspects

• Air: Low-emission materials, air filters, green buffers.

• Water: Treatment plants, reuse systems (greywater), stormwater management.

• Noise: Acoustic barriers, insulation, zoning.

Protection from Environmental Elements

• Role of architecture: Shelter from rain, sun, wind, cold, noise.

• Ventilation and lighting strategies:

  Natural ventilation (cross-ventilation, stack effect, wind catchers).

  Daylighting (windows, skylights, light shelves).

  Shading devices (overhangs, louvers, vegetation).

  Impact: Comfort, reduced energy use, improved IAQ.

VII. Representation & Documentation

Drawing Types & Preparation

• Site plans:

  Importance: Context, compliance with bye-laws, site analysis.

  Typical information: Plot boundaries, contours, existing features, proposed buildings, roads, utilities, landscaping.

• Sketch plans and working drawings:

  Steps for residential/institutional/commercial:

  1. Site analysis & programming

  2. Schematic design (sketch plans)

  3. Design development

  4. Working drawings (plans, elevations, sections, details)

  5. Construction documentation.

• Building plans: Types (location plan, layout plan, floor plans).

  Open spaces in residential design: courtyards, setbacks, balconies – for light, ventilation, recreation.

Presentation Techniques

• Pictorial drawings: Axonometric, isometric, oblique – show 3D form.

• Perspective drawing:

  One-point perspective: Single vanishing point, frontal view. Example: Building facade.

  Two-point perspective: Two vanishing points, angular view. Example for interior: Room corner showing walls, furniture.

  Elements: Horizon line, vanishing points, picture plane.

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

Working Drawings for Different Building Types (Institutional Focus)

• Focus: Functional spaces (classrooms, labs, libraries), circulation (corridors, stairs), accessibility (ramps, lifts), services layout (HVAC, electrical).

• Drawings included: Site plan, floor plans, elevations, sections, detail drawings (staircase, typical room), schedule of finishes.

[!TIP] Exam Focus

• Foundations: Draw & label well, open, grillage foundations (frequent 7-mark questions).

• NBC & Bye-laws: Memorize building classifications, FAR formula, setback importance.

• Architectural Principles: Contrast balance, unity, proportion with examples.

• Services: Fire-fighting elements, elevator standards, drainage layout diagram.

• Sustainability: Energy-efficient practices vs materials, intelligent building features.

• Perspective: Differentiate 1-point vs 2-point with examples.

• Always include diagrams where asked – label clearly.