👉Structural Roof & Frame Types
1. Tapered Column Clear Span
- Ridge line with no interior supports
- Maximizes open interior space
- Ideal for warehouses & large halls
2. Multi Gable System
- Multiple gable frames connected
- Modular width expansion possible
- Used in industrial sheds & factories
3. Arched Multi Span (Flat Multi-Bay)
- Flat arched frames across bays
- Efficient load distribution
- Suitable for wide-span structures
4. Arched Multi Span (Curved Arch Frame)
- Curved arch system with modules
- Aesthetic appeal + structural strength
- Common in auditoriums & sports arenas
5. Multi Span “1”
- Multi-span gable roof
- Economical for medium-width buildings
- Flexible for extensions
6. Mono Slope
- Single slope roof system
- Simple design, cost-effective
- Often used in small sheds & annexes
7. Complex Residential Roof (Hip + Steel Truss)
- Hip roof with steel truss support
- Strong against wind loads
- Popular in residential & institutional buildings
8. Multi Span “2” (Sawtooth Roof)
- Sawtooth profile for natural lighting
- Common in factories & workshops
- Energy-efficient design
9. Multi Span “3” (Flat Multi-Bay)
- Repeated flat bay modules
- Scalable for large industrial complexes
- Easy to construct & expand
#ConcreteAndSteel #StructuralDesign #RoofSystems #EngineeringInfographic #ConstructionDetails #SteelStructures #ArchitectureDesign #BuildingFrames #CivilEngineering
@etconp
1. Tapered Column Clear Span
- Ridge line with no interior supports
- Maximizes open interior space
- Ideal for warehouses & large halls
2. Multi Gable System
- Multiple gable frames connected
- Modular width expansion possible
- Used in industrial sheds & factories
3. Arched Multi Span (Flat Multi-Bay)
- Flat arched frames across bays
- Efficient load distribution
- Suitable for wide-span structures
4. Arched Multi Span (Curved Arch Frame)
- Curved arch system with modules
- Aesthetic appeal + structural strength
- Common in auditoriums & sports arenas
5. Multi Span “1”
- Multi-span gable roof
- Economical for medium-width buildings
- Flexible for extensions
6. Mono Slope
- Single slope roof system
- Simple design, cost-effective
- Often used in small sheds & annexes
7. Complex Residential Roof (Hip + Steel Truss)
- Hip roof with steel truss support
- Strong against wind loads
- Popular in residential & institutional buildings
8. Multi Span “2” (Sawtooth Roof)
- Sawtooth profile for natural lighting
- Common in factories & workshops
- Energy-efficient design
9. Multi Span “3” (Flat Multi-Bay)
- Repeated flat bay modules
- Scalable for large industrial complexes
- Easy to construct & expand
#ConcreteAndSteel #StructuralDesign #RoofSystems #EngineeringInfographic #ConstructionDetails #SteelStructures #ArchitectureDesign #BuildingFrames #CivilEngineering
@etconp
❤11
🏗️ Concrete Compaction Vibrators
Concrete compaction is essential to remove entrapped air, ensuring the mix becomes dense, homogeneous, and durable.
Without proper compaction, concrete may suffer from honeycombing, reduced strength, and poor durability. Vibrators are the primary tools used to achieve this.
🔹 Poker Vibrator
- Structure: Hollow steel tube casing with a rotating impeller inside.
- Operation: The head is inserted into fresh concrete, transmitting vibrations that expel air and compact the mix.
- Specifications:
- Diameter: 26–105 mm
- Length: 325–500 mm
- Insertion spacing: 150–1000 mm
- Penetration: ~75 mm into previously vibrated concrete
- Components:
- Drive hose (3,000–6,000 mm long)
- Power source (electric, diesel, petrol, compressed air)
- Steel casing and poker cap
- Application: Best suited for beams, slabs, and foundations where deep penetration is required.
🔹 Clamp Vibrator
- Structure: Attached directly to formwork.
- Operation: Vibrations are transmitted through the formwork into the concrete.
- Power: Electric or compressed air.
- Application: Ideal for walls, columns, and beams where internal vibrators are difficult to use.
- Advantage: Provides high-frequency vibrations ensuring uniform compaction along vertical surfaces.
🔹 Tamping Board Vibrator
- Structure: Vibrator mounted on single or double boards.
- Operation: Used on large horizontal surfaces to achieve uniform compaction.
- Specifications:
- Single board: up to 4,000 mm length
- Double board: up to 8,000 mm length
- Power: Electric or petrol engine.
- Application: Pavements, slabs, floors, and bridge decks.
- Advantage: Covers large areas efficiently, ensuring consistent density.
⚠️ Notes for Effective Compaction
- Proper vibration increases strength, density, and durability.
- Avoid over-vibration to prevent segregation.
- Maintain correct insertion depth and spacing.
- Ensure uniform compaction across the entire concrete mass.
📌 Summary
Concrete vibrators are indispensable in modern construction.
- Poker vibrators → Deep penetration for foundations.
- Clamp vibrators → Effective for vertical elements.
- Tamping board vibrators → Best for large horizontal surfaces.
Each type has a specific role, and correct usage ensures long-lasting, defect-free concrete structures.
#ConcreteTechnology #ConstructionTools #StructuralEngineering #ConcreteCompaction #EngineeringInfographic
@etconp
Concrete compaction is essential to remove entrapped air, ensuring the mix becomes dense, homogeneous, and durable.
Without proper compaction, concrete may suffer from honeycombing, reduced strength, and poor durability. Vibrators are the primary tools used to achieve this.
🔹 Poker Vibrator
- Structure: Hollow steel tube casing with a rotating impeller inside.
- Operation: The head is inserted into fresh concrete, transmitting vibrations that expel air and compact the mix.
- Specifications:
- Diameter: 26–105 mm
- Length: 325–500 mm
- Insertion spacing: 150–1000 mm
- Penetration: ~75 mm into previously vibrated concrete
- Components:
- Drive hose (3,000–6,000 mm long)
- Power source (electric, diesel, petrol, compressed air)
- Steel casing and poker cap
- Application: Best suited for beams, slabs, and foundations where deep penetration is required.
🔹 Clamp Vibrator
- Structure: Attached directly to formwork.
- Operation: Vibrations are transmitted through the formwork into the concrete.
- Power: Electric or compressed air.
- Application: Ideal for walls, columns, and beams where internal vibrators are difficult to use.
- Advantage: Provides high-frequency vibrations ensuring uniform compaction along vertical surfaces.
🔹 Tamping Board Vibrator
- Structure: Vibrator mounted on single or double boards.
- Operation: Used on large horizontal surfaces to achieve uniform compaction.
- Specifications:
- Single board: up to 4,000 mm length
- Double board: up to 8,000 mm length
- Power: Electric or petrol engine.
- Application: Pavements, slabs, floors, and bridge decks.
- Advantage: Covers large areas efficiently, ensuring consistent density.
⚠️ Notes for Effective Compaction
- Proper vibration increases strength, density, and durability.
- Avoid over-vibration to prevent segregation.
- Maintain correct insertion depth and spacing.
- Ensure uniform compaction across the entire concrete mass.
📌 Summary
Concrete vibrators are indispensable in modern construction.
- Poker vibrators → Deep penetration for foundations.
- Clamp vibrators → Effective for vertical elements.
- Tamping board vibrators → Best for large horizontal surfaces.
Each type has a specific role, and correct usage ensures long-lasting, defect-free concrete structures.
#ConcreteTechnology #ConstructionTools #StructuralEngineering #ConcreteCompaction #EngineeringInfographic
@etconp
❤9
👉Water–cement ratio
🫵The ratio is given as 0.62, which defines the proportion of water to cement by weight.
This directly affects concrete strength and durability.
- Water quantity:
For 1 cubic meter of normal-weight concrete, the water content is specified as 180 kg.
- Cement calculation:
Based on the ratio, the cement required is 290.32 kg per cubic meter.
- Weight of water:
The water mass converts to a load of 1.77 kN.
- Weight of cement:
The cement mass converts to a load of 2.85 kN.
- Combined weight:
Adding both gives a total combined load of 4.61 kN.
📌 Key Takeaways
- Cement required: 290.32 kg/m³
- Water required: 180 kg/m³
- Combined weight of cement and water: 4.61 kN
This is a fundamental calculation in civil site engineering, ensuring proper mix proportions for strength, durability, and workability.
#ConcreteMixDesign #StructuralEngineering #ConstructionKnowledge #EngineeringInfographic #SiteWork #ConcreteTechnology
@etconp
🫵The ratio is given as 0.62, which defines the proportion of water to cement by weight.
This directly affects concrete strength and durability.
- Water quantity:
For 1 cubic meter of normal-weight concrete, the water content is specified as 180 kg.
- Cement calculation:
Based on the ratio, the cement required is 290.32 kg per cubic meter.
- Weight of water:
The water mass converts to a load of 1.77 kN.
- Weight of cement:
The cement mass converts to a load of 2.85 kN.
- Combined weight:
Adding both gives a total combined load of 4.61 kN.
📌 Key Takeaways
- Cement required: 290.32 kg/m³
- Water required: 180 kg/m³
- Combined weight of cement and water: 4.61 kN
This is a fundamental calculation in civil site engineering, ensuring proper mix proportions for strength, durability, and workability.
#ConcreteMixDesign #StructuralEngineering #ConstructionKnowledge #EngineeringInfographic #SiteWork #ConcreteTechnology
@etconp
❤3👍1
👉Structural Mechanics of Arch Bridge
Compression Force Flow
- The arch ring works entirely in compression.
- Loads applied on the deck are transferred through spandrels/verticals into the arch.
- The arch pushes outward at the abutments, creating horizontal thrust that must be resisted by strong foundations.
Load Transfer Path
- Live load (vehicles) → Bridge deck
- Deck → Spandrels/verticals
- Spandrels → Arch ring (compression)
- Arch ring → Abutments → Foundation
This path ensures stability by channeling forces into the ground.
Structural Stability
- Stable under compression: Arch bridges are inherently stable when loads are compressive.
- Unstable under tension: An inverted arch fails because tension forces dominate.
- Stability is achieved when vertical loads, horizontal thrust, and reactions are balanced.
Key Components
- Arch ring – carries compression.
- Bridge deck – supports traffic loads.
- Spandrels/verticals – transfer loads to arch.
- Abutments – resist thrust.
- Foundation – anchors the structure.
Force Polygon & Equilibrium
- Forces represented as polygons show balance of vertical loads, reactions, and thrust.
- Distributed loads are represented as \(W1, W2, … W_6\).
- Reactions include vertical supports and horizontal thrust.
- Stability requires closure of the force polygon.
Design Principles
1. Shape geometry optimization – Proper curve ensures efficient load transfer.
2. Material selection – Stone, concrete, or steel with high compressive strength.
3. Robust abutments – Must resist horizontal thrust and prevent sliding.
📌 Summary
Arch bridges are masterpieces of engineering where compression is the hero.
The arch ring channels loads into abutments, foundations resist thrust, and geometry ensures stability.
Their efficiency lies in using materials strong in compression and designing abutments that can withstand outward forces.
#CivilEngineering #ArchBridge #StructuralMechanics #BridgeDesign #CompressionForces #EngineeringInfographic #InfrastructureDevelopment #ConstructionTechnology
@etconp
Compression Force Flow
- The arch ring works entirely in compression.
- Loads applied on the deck are transferred through spandrels/verticals into the arch.
- The arch pushes outward at the abutments, creating horizontal thrust that must be resisted by strong foundations.
Load Transfer Path
- Live load (vehicles) → Bridge deck
- Deck → Spandrels/verticals
- Spandrels → Arch ring (compression)
- Arch ring → Abutments → Foundation
This path ensures stability by channeling forces into the ground.
Structural Stability
- Stable under compression: Arch bridges are inherently stable when loads are compressive.
- Unstable under tension: An inverted arch fails because tension forces dominate.
- Stability is achieved when vertical loads, horizontal thrust, and reactions are balanced.
Key Components
- Arch ring – carries compression.
- Bridge deck – supports traffic loads.
- Spandrels/verticals – transfer loads to arch.
- Abutments – resist thrust.
- Foundation – anchors the structure.
Force Polygon & Equilibrium
- Forces represented as polygons show balance of vertical loads, reactions, and thrust.
- Distributed loads are represented as \(W1, W2, … W_6\).
- Reactions include vertical supports and horizontal thrust.
- Stability requires closure of the force polygon.
Design Principles
1. Shape geometry optimization – Proper curve ensures efficient load transfer.
2. Material selection – Stone, concrete, or steel with high compressive strength.
3. Robust abutments – Must resist horizontal thrust and prevent sliding.
📌 Summary
Arch bridges are masterpieces of engineering where compression is the hero.
The arch ring channels loads into abutments, foundations resist thrust, and geometry ensures stability.
Their efficiency lies in using materials strong in compression and designing abutments that can withstand outward forces.
#CivilEngineering #ArchBridge #StructuralMechanics #BridgeDesign #CompressionForces #EngineeringInfographic #InfrastructureDevelopment #ConstructionTechnology
@etconp
❤8👍1👏1
👉Here’s a detailed breakdown of the Structural Design of Pipeline Suspension Crossing :
🔹 Design Input Data
- Pipeline Length (LP): 50 m
- Pipe Diameter (Dtub): 3 m (HDPE material)
- Spacing Between Hangers (Sp): 5 m
- Wind Speed (V): 80 km/h
- Seismic Zone Factor (Z): 0.25 (Zone Z2)
- Concrete Strength (fc): 210 kg/cm²
- Steel Yield Strength (Fy): 4200 kg/cm²
- Covers: Column = 4 cm, Foundation = 7 cm
- Bearing Capacity of Soil: 7 kg/cm²
- Unit Weight of Concrete: 1700 kg/m³ (reinforced), 2300 kg/m³ (plain)
🔹 Suspension Tower Heights
- Water Height Inside Pipe: 0.5 m
- Pipe Height to Hanger (Pendula): 4.0 m
- Foundation Embedment Depth: 1.25 m
- Column Height: 7.5 m
🔹 Main Cable Sag (Fc)
- Fc1: LP / 11 = 50 / 11 = 4.5 m
- Fc2: LP / 9 = 50 / 9 = 5.6 m
- Adopted Sag: 5.6 m (ensures stability and reduced tension)
🔹 Load Calculations
Dead Load (WD)
- Pipe Weight = 1.46 kg/m
- Cable Weight = 0.23 kg/m
- Accessories (Clamps, etc.) = 1.89 kg/m
- Total WD = 1.69 kg/m
Live Load (WV)
- Weight per Hanger = 45.00 kg
- Weight of 20 m Segment = 15.90 kg/m
- Additional distributed load = 13831 kg/m
- Total WV = 487.10 kg/m
🔹 Structural Behavior
- Distributed Load (Wu): Acts along the suspended pipeline.
- Shear Force (Vu): Concentrated at hanger connections.
- Bending Moment (Mu): Maximum at mid-span due to sag and live load.
- Safety Considerations: Wind load, seismic factor, and soil bearing capacity are integrated into design.
🔹 Engineering Insight
This design ensures:
- Efficient load transfer from pipeline → hangers → main cable → suspension towers → foundations.
- Sag adoption balances tension and deflection.
- Concrete and steel strengths are chosen to resist seismic and wind effects.
- Embedment depth and soil capacity guarantee foundation stability.
#CivilEngineering #PipelineDesign #SuspensionStructures #StructuralEngineering #ConstructionDesign #EngineeringInfographic #InfrastructureDevelopment #BridgeEngineering #WaterSystems #EngineeringMadeSimple
@etconp
🔹 Design Input Data
- Pipeline Length (LP): 50 m
- Pipe Diameter (Dtub): 3 m (HDPE material)
- Spacing Between Hangers (Sp): 5 m
- Wind Speed (V): 80 km/h
- Seismic Zone Factor (Z): 0.25 (Zone Z2)
- Concrete Strength (fc): 210 kg/cm²
- Steel Yield Strength (Fy): 4200 kg/cm²
- Covers: Column = 4 cm, Foundation = 7 cm
- Bearing Capacity of Soil: 7 kg/cm²
- Unit Weight of Concrete: 1700 kg/m³ (reinforced), 2300 kg/m³ (plain)
🔹 Suspension Tower Heights
- Water Height Inside Pipe: 0.5 m
- Pipe Height to Hanger (Pendula): 4.0 m
- Foundation Embedment Depth: 1.25 m
- Column Height: 7.5 m
🔹 Main Cable Sag (Fc)
- Fc1: LP / 11 = 50 / 11 = 4.5 m
- Fc2: LP / 9 = 50 / 9 = 5.6 m
- Adopted Sag: 5.6 m (ensures stability and reduced tension)
🔹 Load Calculations
Dead Load (WD)
- Pipe Weight = 1.46 kg/m
- Cable Weight = 0.23 kg/m
- Accessories (Clamps, etc.) = 1.89 kg/m
- Total WD = 1.69 kg/m
Live Load (WV)
- Weight per Hanger = 45.00 kg
- Weight of 20 m Segment = 15.90 kg/m
- Additional distributed load = 13831 kg/m
- Total WV = 487.10 kg/m
🔹 Structural Behavior
- Distributed Load (Wu): Acts along the suspended pipeline.
- Shear Force (Vu): Concentrated at hanger connections.
- Bending Moment (Mu): Maximum at mid-span due to sag and live load.
- Safety Considerations: Wind load, seismic factor, and soil bearing capacity are integrated into design.
🔹 Engineering Insight
This design ensures:
- Efficient load transfer from pipeline → hangers → main cable → suspension towers → foundations.
- Sag adoption balances tension and deflection.
- Concrete and steel strengths are chosen to resist seismic and wind effects.
- Embedment depth and soil capacity guarantee foundation stability.
#CivilEngineering #PipelineDesign #SuspensionStructures #StructuralEngineering #ConstructionDesign #EngineeringInfographic #InfrastructureDevelopment #BridgeEngineering #WaterSystems #EngineeringMadeSimple
@etconp
❤11
👉Concept of Unit Weight
- Unit weight is the weight of a material per unit volume, expressed in kg/m³.
- It is essential in structural design, load calculations, and material estimation.
- These are standard approximate values, used for preliminary design, but actual site values may vary.
📊 Standard Unit Weights (Details)
- R.C.C → 2500 kg/m³. Reinforced Cement Concrete is heavier due to steel reinforcement.
- P.C.C → 2400 kg/m³. Plain Cement Concrete, slightly lighter than RCC.
- Brick Work → 1800 kg/m³. Depends on brick type and mortar ratio.
- Soil → 1600 kg/m³. Varies with compaction and moisture content.
- Coarse Aggregate → 2300 kg/m³. Used in concrete mix; density affects strength.
- Fine Aggregate → 2350 kg/m³. Sand; slightly denser than coarse aggregate.
- Cement → 1440 kg/m³. Bulk density of cement powder.
- Steel → 7850 kg/m³. Very dense; critical for reinforcement and structural members.
- Stone Masonry → 2300 kg/m³. Depends on stone type (granite, limestone, etc.).
- Cement Mortar → 2100 kg/m³. Mix of cement and sand; density varies with ratio.
🏗️ Practical Applications
- Structural Load Analysis → Dead load calculations rely on these values.
- Material Procurement → Helps estimate required quantities for construction.
- Foundation Design → Soil unit weight is vital for bearing capacity.
- Mix Design → Aggregate and cement weights influence concrete strength.
⚠️ Notes
- Values are approximate and should be verified for critical design.
- Local material properties may differ due to source, compaction, and moisture.
- Engineers often perform field tests to confirm actual densities.
#CivilEngineering #ConstructionMaterials #UnitWeight #StructuralDesign #Concrete #Steel #BrickWork #SoilMechanics #MaterialEstimation #EngineeringInfographic
@etconp
- Unit weight is the weight of a material per unit volume, expressed in kg/m³.
- It is essential in structural design, load calculations, and material estimation.
- These are standard approximate values, used for preliminary design, but actual site values may vary.
📊 Standard Unit Weights (Details)
- R.C.C → 2500 kg/m³. Reinforced Cement Concrete is heavier due to steel reinforcement.
- P.C.C → 2400 kg/m³. Plain Cement Concrete, slightly lighter than RCC.
- Brick Work → 1800 kg/m³. Depends on brick type and mortar ratio.
- Soil → 1600 kg/m³. Varies with compaction and moisture content.
- Coarse Aggregate → 2300 kg/m³. Used in concrete mix; density affects strength.
- Fine Aggregate → 2350 kg/m³. Sand; slightly denser than coarse aggregate.
- Cement → 1440 kg/m³. Bulk density of cement powder.
- Steel → 7850 kg/m³. Very dense; critical for reinforcement and structural members.
- Stone Masonry → 2300 kg/m³. Depends on stone type (granite, limestone, etc.).
- Cement Mortar → 2100 kg/m³. Mix of cement and sand; density varies with ratio.
🏗️ Practical Applications
- Structural Load Analysis → Dead load calculations rely on these values.
- Material Procurement → Helps estimate required quantities for construction.
- Foundation Design → Soil unit weight is vital for bearing capacity.
- Mix Design → Aggregate and cement weights influence concrete strength.
⚠️ Notes
- Values are approximate and should be verified for critical design.
- Local material properties may differ due to source, compaction, and moisture.
- Engineers often perform field tests to confirm actual densities.
#CivilEngineering #ConstructionMaterials #UnitWeight #StructuralDesign #Concrete #Steel #BrickWork #SoilMechanics #MaterialEstimation #EngineeringInfographic
@etconp
❤13
👉Hydroelectric Dam
🌊 Reservoir
The reservoir is the large water body behind the dam.
It stores potential energy in the form of water at height.
This stored water is the primary source of energy for the hydroelectric system.
🌉 Spillway
The spillway provides a safe passage for excess water during floods or heavy rainfall. It prevents overtopping and protects the dam structure.
🚪 Intake Gate
The intake gate regulates the amount of water entering the penstock.
It acts like a valve, controlling flow based on electricity demand.
🛠 Penstock
A penstock is a pressurized conduit (large pipe) that directs water from the reservoir to the turbine.
Its design must withstand high water pressure.
⚙️ Turbine
The turbine converts the kinetic energy of flowing water into mechanical energy.
The blades spin as water strikes them, initiating the energy conversion process.
🔌 Generator
Coupled with the turbine, the generator transforms mechanical energy into electrical energy using electromagnetic induction.
🏠 Powerhouse
The powerhouse is the structural building that houses turbines, generators, and auxiliary equipment. It is the operational hub of the dam.
🔋 Transformer
The transformer steps up the voltage of electricity generated, making it suitable for long‑distance transmission with minimal losses.
⚡ Transmission Lines
These high‑voltage lines carry electricity from the dam to homes, industries, and cities, integrating renewable energy into the grid.
🚦 Control Gate
The control gate fine‑tunes water release downstream, ensuring ecological balance and controlled river flow.
🌍 Downstream River
After energy extraction, water is released back into the river, maintaining the natural cycle and supporting aquatic ecosystems.
Flow of Energy
Water (Potential Energy) → Dam (Conversion) → Power (Electricity)
#HydroelectricPower #RenewableEnergy #CivilEngineering #DamDesign #WaterResources #EnergySystems #SustainableEngineering #PowerGeneration #Hydropower #EngineeringInfographic
@etconp
🌊 Reservoir
The reservoir is the large water body behind the dam.
It stores potential energy in the form of water at height.
This stored water is the primary source of energy for the hydroelectric system.
🌉 Spillway
The spillway provides a safe passage for excess water during floods or heavy rainfall. It prevents overtopping and protects the dam structure.
🚪 Intake Gate
The intake gate regulates the amount of water entering the penstock.
It acts like a valve, controlling flow based on electricity demand.
🛠 Penstock
A penstock is a pressurized conduit (large pipe) that directs water from the reservoir to the turbine.
Its design must withstand high water pressure.
⚙️ Turbine
The turbine converts the kinetic energy of flowing water into mechanical energy.
The blades spin as water strikes them, initiating the energy conversion process.
🔌 Generator
Coupled with the turbine, the generator transforms mechanical energy into electrical energy using electromagnetic induction.
🏠 Powerhouse
The powerhouse is the structural building that houses turbines, generators, and auxiliary equipment. It is the operational hub of the dam.
🔋 Transformer
The transformer steps up the voltage of electricity generated, making it suitable for long‑distance transmission with minimal losses.
⚡ Transmission Lines
These high‑voltage lines carry electricity from the dam to homes, industries, and cities, integrating renewable energy into the grid.
🚦 Control Gate
The control gate fine‑tunes water release downstream, ensuring ecological balance and controlled river flow.
🌍 Downstream River
After energy extraction, water is released back into the river, maintaining the natural cycle and supporting aquatic ecosystems.
Flow of Energy
Water (Potential Energy) → Dam (Conversion) → Power (Electricity)
#HydroelectricPower #RenewableEnergy #CivilEngineering #DamDesign #WaterResources #EnergySystems #SustainableEngineering #PowerGeneration #Hydropower #EngineeringInfographic
@etconp
❤11👍4🎉2