👉የዘላቂ የመንግስት ግዥ (Sustainable Public Procurement) ዓላማዎች ምንድን ናቸው?

▶️ የዘላቂ የመንግስት ግዥ (Sustainable Public Procurement) ዋና ዓላማ የመንግስት ወጪ ዘላቂ ልማትን እንዲደግፍ ማድረግ እና የመንግስት ገንዘብ ተመጣጣኝ ዋጋ (Value for Money) እንዲያገኝ ማስቻል ነው፡፡

ይህ በእንዲህ እንዳለ ሌሎች ዝርዝር ዓላማዎች ይኖሩታል፡፡ እንዚህም የመንግስትን ሀብት በብቃት መጠቀምን ማበረታታት፣ አካባቢን መጠበቅ፣ ማህበራዊ ፍትሃዊነትን እና የሰብአዊ መብቶችን መደገፍ፣ ዘላቂ የኢኮኖሚ ዕድገትን ማበረታታት፣ ግልጽነትን እና ተጠያቂነትን ማጠናከር፣ ፈጠራን እና አረንጓዴ ቴክኖሎጂዎችን ማበረታታት፣ ሀገር በቀል ተቋማትን እና አነስተኛ ድርጅቶችን መደገፍ እና ሌሎች ተያያዥ ጉዳዮችም ሊጠቀሱ ይችላሉ፡፡

▶️ ስለሆነም ይህ የግዥ ስርዓት የመንግስት ተቋማት የሚጠቀሙት ዕቃዎችን እና አገልግሎቶችን ለማግኘት ብቻ ሳይሆን ሰፋ ያሉ የብሔራዊ ልማት ግቦችንም ለማሳካት ጭምር እንደሆነ የሚያስገነዝብ ነው። በዋናነት የዘላቂ የመንግስት ግዥ (Sustainable Public Procurement) ጉዳዮችን ታሳቢ ያደረገ ነው።
ዘላቂ የመንግስት ግዥ (Sustainable Public Procurement) ሦስት ዋና ዋና ጉዳዮችን ታሳቢ ያደረገ ነው ሲባል ምን ማለት ነው?

▶️ ዘላቂ የመንግስት ግዥ (Sustainable Public Procurement) ከአንድ አቅጣጫ ብቻ የሚታይ አይደለም፡፡

ማለትም ግዥውን ለመፈጸም ዝቅተኛ ዋጋን እንደ መስፈረት መውሰድ በቂ አይደለም፤ የእቃውን ጥራትም እንደ ግዥ መስፈርት ወስዶ ግዥውን መፈጸም በቂ አይደለም፡፡ ይልቁንም ግዥውን ለመፈጸም ከላይ ከገለጸናቸው መስፈርቶች በተጨማሪ ያለውን ኢኮኖሚያዊ ጠቀሚታ፣ በአካባቢ ላይ ተጽዕኖ የማያሳድር መሆኑ፣ ማህበራዊ አገልግሎት ላይ ያለው አስተዋጽዖ፣ አረንጓዴ ልማትን መድገፍ የሚያስችል መሆኑና ሌሎች መሰል መስፈርቶች ከግምት ውስጥ የሚገቡ ናቸው፡፡ በዝርዝር ለመመልከት ያህል፦

▶️ የኢኮኖሚ ዘላቂነት (Economic sustainability)፦ የኢኮኖሚ ዘላቂነት በምርቶች እና በአገልግሎቶች የህይወት ዑደት ውስጥ ለተከፈለው ገንዘብ ተመጣጣኝ ዋጋ (Value for Money) ማረጋገጥ ላይ ያተኩራል።

ይህም የወጪ ውጤታማነትን (Cost efficiency)፣ የጥራት ማሻሻያን (Quality improvement)፣ ዘላቂነትን (Durability)፣ የጥገና ወጪ መቀነስን  (Reduction of maintenance costs) እና የረጅም ጊዜ የፋይናንስ ቁጠባን (Long-term financial savings) መሰረት ያደረገ ነው፡፡

ስለሆነም በዚህ ሂደት ውስጥ የግዥ ባለሙያዎች የመግዣ ዋጋ ላይ ብቻ  አያተኩሩም ይልቁንም ከመግዣ ዋጋው በተጨማሪ የሥራ ማስኬጃ ወጪዎችን፣ የጥገና ወጪዎችን እና የማስወገጃ ወጪዎችንም ግንዛቤው ውስጥ ያስገባሉ።

▶️ የአካባቢ ዘላቂነት (Environmental sustainability)፡- የአካባቢ ዘላቂነት የግዥ ሂደቶች ግዥው በአካባቢ ላይ የሚያስከትለውን አሉታዊ ተፅዕኖ መቀነስ ላይ ያተኩራል። ከላይ ለመግለጽ እንደሞከርነው የሚገዙ ግዥዎች በአካባቢ ላይ ብክለትን የማያስከትሉ መሆናቸው መረጋገጥ ይኖርበታል፡፡

ይህን ስንል የሚገዙ ምርቶች ብክለትን የሚቀንሱ፣ ኃይልን የሚቆጥቡ፣ እንደገና ጥቅም ላይ ሊውሉ የሚችሉ ቁሳቁሶችን የሚጠቀሙ፣ የግሪን ሀውስ ጋዞችን የሚቀንሱ እና ታዳሽ ኃይልን የሚያበረታቱ መሆናቸው ግንዛቤ ውስጥ መግባት ይኖርበታል፡፡

ምክንያቱም የአካባቢ ተስማሚ ግዥ (Environmental Sustainability Procurement) የአየር ንብረት ለውጥን ለመቀነስ እና የተፈጥሮ ሀብቶችን ለመጠበቅ አስተዋፅኦ ያደርጋል።

▶️ ማህበራዊ ዘላቂነት (Social Sustainability):-  ማህበራዊ ዘላቂነት የማህበራዊ ደህንነትን ለማሻሻል እና ሥነ-ምግባራዊ የንግድ አሠራሮች ማረጋገጥ ላይ የሚያተኩር ሲሆን ፍትሃዊ የሥራ ልምዶች፣ የሰብአዊ መብቶች ጥበቃ፣ የሥራ ቦታ ደህንነት፣ የፆታ እኩልነት፣ የሥራ ዕድል ፈጠራ እና ለተጋላጭ ቡድኖች ድጋፍ መስጠትን የሚያበረታታ ነው፡፡

@etconp

🏗️ Futuristic Engineering Meets Structural Innovation 🌍

This visionary elevated building concept redefines modern urban construction by combining architectural creativity with advanced structural engineering.

Suspended on a massive reinforced concrete core, the structure showcases exposed concrete frames, unfinished slabs, external zigzag staircases, and active construction zones — highlighting the raw beauty of engineering in progress.

A bold fusion of functionality, realism, and futuristic infrastructure that demonstrates how modern cities could maximize space while pushing the limits of structural design.

@etconp

🌉 Arched Bridge Engineering — Strength Beneath the Structure

This realistic engineering visualization highlights the anatomy of a modern arch bridge, where reinforced concrete, deep foundations, drainage systems, and slope stabilization work together to ensure maximum durability and structural performance.

Built over challenging red-soil terrain, every component reflects precision civil engineering and advanced infrastructure design.

🏗️ Modern infrastructure powered by innovation, safety, and structural excellence.

#CivilEngineering
#BridgeDesign
#Infrastructure #StructuralEngineering #MegaProjects

@etconp

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● Concrete Admixtures
● Bonding Agents
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● Wall Putty, Prime Coat
● Concrete Repair Mortar
● Floor hardener, Epoxy
● Grout, Self-level mortar
● Quartz paint, Contextra
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● Geotextiles and other construction chemicals and materials

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Dinberwa Hospital

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Dani Plaza

👉Steel calculation in construction is a crucial step in ensuring the strength, durability, and safety of reinforced concrete structures.

The infographic you shared highlights the typical percentage of steel used in different structural members, which is based on standard engineering practices. Let’s break it down in detail:

🔹 Importance of Steel in Concrete

Concrete is strong in compression but weak in tension.

Steel reinforcement bars (rebars) are added to resist tensile forces, making the structure balanced and safe.

The percentage of steel varies depending on the type of structural member and the loads it carries.

🔹 Steel Percentages in Structural Members

- Slab: About 1% of the total concrete volume. Slabs mainly resist distributed loads, so less steel is required compared to beams or columns.
- Beam: Around 2% of the concrete volume. Beams carry bending and shear forces, hence they need more reinforcement.
- Column: Approximately 2.5% of the concrete volume. Columns bear axial loads and moments, requiring higher steel content for stability.
- Footing: Roughly 0.8% of the concrete volume.

Footings distribute loads to the soil, so reinforcement is relatively lower but still essential.

🔹 Engineering Significance

- Proper steel calculation ensures structural safety and prevents collapse.
- Overuse of steel increases cost, while underuse compromises strength.
- Following standard percentages helps maintain economy and efficiency in construction.
- Engineers often adjust these values based on design codes, load conditions, and soil properties.

🔹 Visual Understanding
The 3D and top-view

illustrations of reinforcement grids show how rebars are arranged to form a strong skeleton inside the concrete.

This skeletal framework is what gives reinforced concrete its reliability.

#SteelCalculation #StructuralDesign #ConstructionSafety

@etconp

👉Reactions at Supports
The beam is supported at two points, A and B. By applying equilibrium principles, the upward reactions at these supports are determined. Support B carries the larger share of the load, while support A carries the smaller portion.

This balance ensures the beam remains stable under the applied loads and moment.

🔹 Shear Force Diagram (S.F.D.)

The shear force diagram shows how vertical forces vary along the beam.

It is drawn by considering the algebraic sum of vertical loads at different sections.

The point where the shear force changes sign is critical, as it indicates the location of maximum bending moment.

🔹 Bending Moment Diagram (B.M.D.)

The bending moment diagram is derived from the shear force diagram.

It represents how bending stresses develop along the beam.

The maximum bending moment occurs exactly where the shear force crosses zero, highlighting the most stressed section of the beam.

🔹 Key Concepts Recap

- Use equilibrium to find reactions at supports.
- Shear force is based on vertical load distribution.
- Bending moment is obtained from the shear force diagram.
- The most critical point is where shear changes sign, as this is where maximum bending occurs.

This process is fundamental in structural analysis and helps civil engineers design beams that can safely resist applied loads.

#StructuralAnalysis #CivilEngineering #BeamDesign #SFD #BMD

@etconp

Crank Bar in Shallow Beam

A crank bar is a bent reinforcement bar used in RCC beams to resist both bending moment and shear force near supports. It is usually bent at 45° (or 30° in shallow beams) to transfer tension safely from the bottom to the top of the beam.

Main Purposes:

Resists negative (hogging) moment

Helps resist high shear force at supports

Reduces chances of brittle failure

Saves reinforcement steel and improves structural strength

Common Use:

Crank bars are mainly used in shallow beams, slabs, and continuous beams for better load distribution and durability.

#CrankBar #ShallowBeam #RCCBeam #BeamReinforcement #CivilEngineering #StructuralEngineering #ConstructionDetail #ReinforcedConcrete #ShearForce #BendingMoment #BeamDesign #SiteEngineering

@etconp

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👉Reinforced concrete (RC) columns are the backbone of structural systems, and stirrups (ties) play a critical role in ensuring their strength, stability, and safety.

Let’s break down the details:

🔹 Purpose of Stirrup

- Shear resistance: Stirrups enclose the longitudinal bars and resist shear forces acting on the column.
- Buckling prevention: They hold the vertical bars in place, preventing them from buckling under heavy loads.
- Load distribution: By tying the bars together, stirrups help distribute stresses evenly across the column section.
- Structural safety: They ensure the bars remain in their designed positions, maintaining the integrity of the column.

🔹 Column Shapes with Stirrups

- Rectangular column: The most common type, used in general building structures. Bars are placed at each corner, with stirrups enclosing them.
- T-shaped column: Often used in walls or boundary structures where architectural requirements dictate the shape.
- L-shaped column: Typically found at corners of buildings, providing strength against multidirectional forces.

🔹 Key Detailing Rules

- A bar must always be placed at each corner of the stirrup.
- Stirrups must be closed ties to ensure confinement.
- Spacing of stirrups depends on load intensity and design codes.
- Hooks at stirrup ends are bent at 90° or 135°, with 135° preferred in earthquake-prone zones for better anchorage.

🔹 Structural Benefits

- Enhanced ductility of columns.
- Improved earthquake resistance.
- Increased service life of the structure.
- Better load-carrying capacity and safety margins.

✅ In short, stirrups are not just ties — they are the silent guardians of column strength, ensuring safety and durability in every structure.

#StructuralDesign #RCColumns #Stirrups #SmartConstruction #SafetyFirst #BuiltOnKnowledge #EngineeredForFuture

@etconp

Dumper Capacity Calculation

Dumper capacity is the maximum volume of material a dumper can transport in one trip.

It is usually measured in cubic meters (m³) and depends on the dumper body's length, width, height, and fill factor. Proper capacity calculation improves productivity, fuel efficiency, and site safety.

#DumperCapacity #ConstructionEquipment #CivilEngineering #Earthwork #SiteEngineering #HeavyMachinery #ConstructionManagement #RoadConstruction #EngineeringEducation #InfrastructureDevelopment

@etconp

BOX CULVERT CONSTRUCTION COMPONENTS

A box culvert is a reinforced concrete structure built beneath roads, railways, or embankments to safely convey stormwater, streams, or drainage flow.

Main Components

🔹 Road Pavement
🔹 Base Course
🔹 Reinforced Concrete Box
🔹 Wing Walls
🔹 Bedding Layer
🔹 Foundation/Apron
🔹 Backfill Material
🔹 Filter Layer
🔹 Cut-off Wall
🔹 Outlet Protection (Riprap)

How It Works

Water flows through the reinforced concrete box while the pavement above carries traffic loads.

Wing walls guide water, and the foundation, bedding, and backfill provide stability and prevent settlement or erosion.

#BoxCulvert
#CulvertDesign
#DrainageEngineering
#CivilEngineering
#RoadConstruction
#Infrastructure
#ConcreteStructure
#HighwayEngineering
#ConstructionDetails
#EngineeringEducation

@etconp

Concrete Block Calculation Guide

This guide shows how to estimate the number of concrete blocks, mortar, sand, and cement required for a 1 m² block wall.

A standard concrete block size of 400 mm × 200 mm covers 0.08 m², so approximately 12.5 blocks are needed per square meter. It also provides a simple method for calculating mortar and material quantities for masonry work.

Key Points

✅ 1 m² wall = 12.5 concrete blocks
✅ Standard block size = 400 × 200 mm
✅ Mortar is used to bond blocks together
✅ Sand and cement quantities can be estimated from mortar volume
✅ Useful for site estimation and material planning

#ConcreteBlock
#MasonryWork
#BlockWall
#CivilEngineering
#ConstructionEstimate
#BuildingConstruction
#QuantitySurveying
#SiteEngineering
#ConstructionMaterials
#CivilEngineerLife

@etconp