👉በአገራችን የግንባታ ኮንትራት ስርዓት መሠረት (በተለምዶ በ Public Procurement and Property Authority መመሪያዎች እና በ Ethiopian Public Procurement Proclamation No. 649/2009 የመሠረተ ልማት) በግንባታ ፕሮጀክቶች ውስጥ የስራ መጠን ለውጦች፣ ክፍያዎች እና የኮንትራክተር አፈፃፀምን ለመቆጣጠር ብዙ የኮንትራት ቃላት ይጠቀማል።

🏷ከእነዚህ ዋና ዋና ቃላት የሚከተሉት ናቸው።

1. ኦሚሽን (Omission)

ትርጉም
ኦሚሽን ማለት በኮንትራቱ ውስጥ የተጠቀሰ አንድ የስራ ክፍል ወይም እቃ ከፕሮጀክቱ ውስጥ መወገድ ማለት ነው።

ዓላማ
✅ የፕሮጀክቱ ዲዛይን ሲቀየር
✅ የበጀት ጉዳይ ሲኖር
✅ አንዳንድ ስራዎች አስፈላጊ ካልሆኑ

ባህሪያት
✅ በ Variation Order ይፈፀማል
✅ ኮንትራክተሩ ለተወገደው ስራ ክፍያ አይጠይቅም
✅ የኮንትራት ዋጋ ይቀንሳል

ምሳሌ
10 km የውሃ መስመር ለመጫን ተወስኖ ነበር።
በኋላ 2 km አስፈላጊ አይደለም ተብሎ ከፕሮጀክቱ ተወገደ።

2. አዲሽን (Addition / Extra Work)

ትርጉም
አዲሽን ማለት ከመጀመሪያ ኮንትራት በኋላ የሚጨመር አዲስ ስራ ወይም የስራ መጠን መጨመር ነው።

ዓላማ
✅ ዲዛይን እንዲሟላ ያደርጋል
✅ የፕሮጀክቱ ጥራት እንዲሻሻል ይጠቅማል

ባህሪያት
✅ በኢንጅነር ወይም በባለቤት ይፀድቃል
✅ በ Variation Order ይመዘገባል
✅ ኮንትራክተሩ ተጨማሪ ክፍያ ይቀበላል

የክፍያ መንገዶች
✅ የኮንትራቱን ዋጋ መጠቀም
✅ አዲስ ዋጋ መወሰን
✅ Daywork መጠቀም

3. ቫሪዬሽን ኦርደር (Variation Order)

ትርጉም
ቫሪዬሽን ኦርደር ማለት በኮንትራቱ ውስጥ ያለውን የስራ መጠን ወይም ዲዛይን ለመቀየር የሚሰጥ መደበኛ ትእዛዝ ነው።

ዓይነቶች
✅ ስራ መጨመር
✅ ስራ መቀነስ
✅ ዲዛይን መቀየር
✅ የእቃ አይነት መቀየር

ዋና ነጥቦች
✅ በመደበኛ ሁኔታ መፀደቅ አለበት
✅ የኮንትራቱ ዋጋ ሊጨምር ወይም ሊቀንስ ይችላል
✅ የጊዜ ማራዘሚያ ሊያስፈልግ ይችላል

ፎርሙላ
New Contract Price = Original Price ± Variation Value

4. ቦነስ (Bonus)

ትርጉም
ቦነስ ማለት ኮንትራክተሩ ፕሮጀክቱን ከተወሰነው ጊዜ በፊት ካጠናቀቀ የሚሰጥ ተጨማሪ ክፍያ ነው።

ዓላማ
✅ ፕሮጀክቱ በፍጥነት እንዲጠናቀቅ
✅ የመዘግየት አደጋ እንዲቀንስ

ምሳሌ
Bonus = 40,000 Birr / day
ቀደም ብሎ 10 ቀን ካጠናቀቀ
Bonus = 40,000 × 10 = 400,000 Birr

5. ፔናልቲ (Penalty / Liquidated Damage)

ትርጉም
ፔናልቲ ማለት ኮንትራክተሩ ፕሮጀክቱን በተወሰነው ጊዜ ካልጨረሰ የሚቀነስ ገንዘብ ነው።

ዓላማ
✅ የባለቤቱን ኪሳራ ለመከላከል
✅ ኮንትራክተሮች በጊዜ እንዲጨርሱ

ፎርሙላ
Penalty = Contract Price × Penalty Rate × Delay Days

ምሳሌ
Contract Price = 50,000,000 Birr
Penalty Rate = 0.1%
Delay = 20 days
Penalty = 50,000,000 × 0.001 × 20
Penalty = 1,000,000 Birr

6. የጊዜ ማራዘሚያ (Extension of Time – EOT)

ትርጉም
የጊዜ ማራዘሚያ ማለት ኮንትራክተሩ በማይቆጣጠሩ ምክንያቶች ሲዘገይ ተጨማሪ ጊዜ መስጠት ነው።

ምክንያቶች
✅ ከባድ ዝናብ
✅ ጎርፍ
✅ የዲዛይን ለውጥ
✅ የክፍያ መዘግየት
✅ የጥሬ እቃዎች እጥረት

7. የዋጋ ለውጥ (Price Escalation)

ትርጉም
የዋጋ ለውጥ ማለት የስራ እቃ፣ ሰራተኛ ወይም ነዳጅ ዋጋ ሲጨምር የኮንትራቱ ክፍያ መቀየር ነው።

ፎርሙላ
Pn = Po × (a + b(Ln/Lo) + c(Mn/Mo) + d(Fn/Fo))

8. ሪቴንሽን ገንዘብ (Retention Money)

ትርጉም
ሪቴንሽን ገንዘብ ማለት ከኮንትራክተሩ ክፍያ ውስጥ የሚቀነስ ገንዘብ ሲሆን የስራ ጥራት ለማረጋገጥ ይጠቀማል።

በተለምዶ
✅ 5% – 10% ይቀነሳል
መመለሻ
✅ 50% ስራ ሲጠናቀቅ
✅ 50% ከ Defects Liability Period በኋላ

9. የጉድለት ኃላፊነት ጊዜ (Defects Liability Period)

ትርጉም
ፕሮጀክቱ ከተጠናቀቀ በኋላ ኮንትራክተሩ የሚታዩ ጉድለቶችን በራሱ ወጪ የሚያስተካክልበት ጊዜ ነው።

የተለመደ ጊዜ
✅ 6 ወር
✅ 12 ወር

ምሳሌ ጉድለቶች
✅ የኮንክሪት ስንጥቅ
✅ የውሃ ፍሳሽ
✅ የመንገድ መውደቅ

10. ፐርፎርማንስ ቦንድ (Performance Bond)

ትርጉም
ፐርፎርማንስ ቦንድ ማለት ኮንትራክተሩ ስራውን እንደሚፈጽም የሚሰጥ የገንዘብ ዋስትና ነው።

በተለምዶ
✅ 10% የኮንትራት ዋጋ

11. አድቫንስ ክፍያ (Advance Payment)

ትርጉም
አድቫንስ ክፍያ ማለት ስራ ከመጀመሩ በፊት ለኮንትራክተሩ የሚሰጥ የመጀመሪያ ክፍያ ነው።

በተለምዶ
✅ 10% – 20% የኮንትራት ዋጋ

ዓላማ
✅ መሳሪያ ለመግዛት
✅ ሰራተኞችን ለመከፈል
✅ ስራ ለመጀመር

12. ኢንተሪም ክፍያ (Interim Payment Certificate – IPC)

ትርጉም
ኢንተሪም ክፍያ ማለት በፕሮጀክት ሂደት ውስጥ ለተጠናቀቀ ስራ በየወሩ የሚሰጥ ክፍያ ነው።

ፎርሙላ
Payment = Work Done − Retention − Previous Payments

13. የመጨረሻ ክፍያ (Final Payment Certificate)

ትርጉም
የመጨረሻ ክፍያ ማለት ፕሮጀክቱ ከተጠናቀቀ በኋላ የሚሰጥ የመጨረሻ ክፍያ ነው።

የሚያካትታቸው ተግባራት
✅ የቀረ የኮንትራት ክፍያ
✅ ቫሪዬሽን ክፍያ
✅ ሪቴንሽን መመለስ
✅ ፔናልቲ ቅናሽ (ካለ)

via Mekamu Mohammed

@etconp

🛣️ How a Road is Made

💫Road construction involves several stages to ensure strength, durability, and proper drainage. 🏗

1️⃣ Site Clearance
The construction area is cleared by removing trees, vegetation, and unsuitable materials.

2️⃣ Earthwork
Cutting, filling, and leveling of the ground are carried out to achieve the required road alignment and level.

3️⃣ Sub-grade Preparation
The natural soil is shaped, leveled, and compacted to form the subgrade, which is the foundation of the road.

4️⃣ Sub-base Layer
A layer of granular material (such as laterite or crushed stone) is placed and compacted to distribute loads.

5️⃣ Base Course
A stronger layer of crushed aggregate is placed to provide structural strength to the pavement.

6️⃣ Asphalt or Surface Course
Hot asphalt or concrete is laid on top to provide a smooth and durable driving surface.

7️⃣ Drainage and Finishing
Side drains, road shoulders, markings, and signage are installed to complete the road.

A road is built layer by layer, starting from the prepared soil (subgrade) up to the final asphalt surface. Each layer helps the road carry traffic loads safely. 🏗

🚧For more information click this Link Below And Subscribe Our YouTube Channel👇

https://youtube.com/@ethiopianconstruction7?si=ils307xXQQpIdCwG

@etconp

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● Concrete Admixtures
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🔹 Address 1: Signal road, around
Dinberwa Hospital

🔹 Addres 2: Wellosefer, Infront of
Dani Plaza

🏠 Roof Types – Key Notes

📌Single Slope Roof
  - Simple design with one sloping surface.
  - Economical and easy to construct.
  - Common in sheds, small houses, and modern minimalist designs.

📌Gable Roof
  - Two sloping sides meet at a ridge, forming a triangular gable.
  - Provides good drainage and ventilation.
  - Popular in residential buildings for its classic look.

📌Hip Roof
  - All four sides slope downwards to the walls.
  - Strong against wind and weather.
  - More complex than gable, but aesthetically balanced.

📌 Complex Hip Roof
  - Combination of multiple hips, often on L-shaped or irregular buildings.
  - Adds architectural interest and covers larger layouts.
  - Requires more materials and skilled labor.

🏠 Types of Roof Structures in Building Construction

Understanding roof types is important in civil engineering and house construction. Different roof designs help manage rainwater drainage, improve structural stability, and enhance the appearance of a building.

🔹 Single Slope Roof – One sloping surface that allows water to flow in one direction.
🔹 Gable Roof – Two sloping sides meeting at the top ridge. One of the most common residential roof types.
🔹 Hip Roof – Four sloping sides providing better stability and wind resistance.
🔹 Complex Hip Roof – A combination of hip roofs used for L-shaped or complex building plans.

Each roof type has its own advantages depending on climate, building design, and structural requirements

@etconp

👉የዳንጎቴ ሲሚንቶ ግዙፍ ማስፋፊያ ለኢትዮጵያ እድል ይዞ መጥቷል

💫የዳንጎቴ ሲሚንቶ ኩባንያ በቀጣዮቹ አራት ዓመታት ውስጥ የምርት አቅሙን በ45 በመቶ ለማሳደግ የሚያስችለውን የ1 ቢሊዮን ዶላር ግዙፍ የኢንቨስትመንት ዕቅድ ይፋ አድርጓል።

ይህ የማስፋፊያ ፕሮጀክት ኢትዮጵያን፣ ናይጄሪያን እና ሌሎች የአፍሪካ ሀገራትን የኢኮኖሚ ተጠቃሚ እንደሚያደርግ ተመላክቷል።

የስትራቴጂካዊ ስምምነቱ ዝርዝር
ኩባንያው ይህንን መጠነ-ሰፊ የማስፋፊያ ሥራ ለማከናወን ከቻይናው ሲኖማ (Sinoma) ኩባንያ ጋር የግንባታ ስምምነት ተፈራርሟል። የዚህ ስምምነት ዋና ዓላማዎች፦

* የምርት አቅም፦ አሁን ያለውን አጠቃላይ የምርት አቅም ወደ 80 ሚሊዮን ቶን ከፍ ማድረግ።

* የኤክስፖርት ዕድገት፦ በ2025 የነበረውን 1.4 ሚሊዮን ቶን የሲሚንቶና የክሊንከር ኤክስፖርት በ2030 ወደ 10 ሚሊዮን ቶን ማድረስ።

አስደናቂ የትርፍ እና የገቢ ዕድገት
ቢዝነስ ኢንሳይደር አፍሪካ እንደዘገበው፣ የኩባንያው ጠቅላላ ገቢ የ20.3 በመቶ ዕድገት አሳይቷል።

ኩባንያው በ2025 የነበረውን የትርፍ መጠን በሁለት እጥፍ በማሳደግ፣ 1 ትሪሊዮን ናይራ የተጣራ ትርፍ ማስመዝገብ መቻሉን አስታውቋል።

ይህ ኢንቨስትመንት በኢትዮጵያ ያለውን የሲሚንቶ አቅርቦት ፍላጎት ከመሙላት ባለፈ፣ ለግንባታው ዘርፍ መነቃቃትና ለውጭ ምንዛሬ ግኝት ከፍተኛ አስተዋጽኦ ይኖረዋል ተብሎ ይጠበቃል።

Via Getu Temesgen

@etconp

👉Here’s a clear, point‑form breakdown of the vest colors and their meanings from your guide:

🔹 Regulated Vest Colors

- Yellow → Construction, traffic, high‑visibility environments 
- Orange → Construction, railroads, heavy machinery 
- Red → Emergency services, rescue, high‑visibility 

🔸 Not Regulated Vest Colors

- Blue → Visitors, technicians, supervisors 
- Green → Healthcare staff, paramedics, first aid responders 
- White → Supervisors 
- Black → Security, private events 
- Brown → Cleaning, maintenance 
- Gray → Maintenance, low‑risk roles

🚧On construction sites, safety vests are not just for visibility — their colors often indicate different roles and responsibilities.

Understanding these colors helps improve coordination, safety, and communication on site.

🔶 Yellow Vest – Commonly used in construction, traffic control, and high-visibility environments.
🟧 Orange Vest – Used around heavy machinery, railways, and construction zones.
🔴 Red Vest – Typically worn by emergency responders and rescue teams.
🔵 Blue Vest – Often used for visitors, technicians, or supervisors.
🟢 Green Vest – Used by safety staff, health officers, or first-aid responders.
⚪ White Vest – Usually worn by supervisors or site managers.
⚫ Black Vest – Used in security or private event management.
🟤 Brown Vest – Common for cleaning or maintenance staff.
⚙️ Gray Vest – Used for maintenance and low-risk tasks.

Knowing the meaning of vest colors helps maintain proper site organization and safety awareness.

Always follow site safety guidelines and PPE standards.

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@etconp

👉Reflective Vest colors and their meanings

https://t.me/ETCONpWORK

@etconp

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🚧This Is How Engineers Stop Bridges From Rotating Under Eccentric Loads

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👉Why Your Retaining Wall Will FAIL (And How to Fix It)

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👉This Is How A Safe Mountain Road Is Built

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👉Types of Flexible Road Pavement

🚧These refer to the overall pavement structure or layers used in road construction (subgrade, base, binder, and surface layers).

💫1. Conventional Flexible Pavement:

⏺A pavement made of several layers (subgrade, sub-base, base, and asphalt surface) that distributes traffic load gradually to the soil.

💫2. Full-Depth Asphalt Pavement:

⏺A pavement where all structural layers above the subgrade are made entirely of asphalt.

💫3. Contained Rock Asphalt Mat (CRAM):

⏺A type of pavement where asphalt mix is placed within crushed rock to improve strength and load distribution.

💫4. Bituminous Surface Treatment:

⏺A thin layer of bitumen and aggregates applied on the surface, mainly used for low-traffic roads or maintenance.

@etconp

👉 INTERCON Construction Chemicals 

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

☎️ Tel: 0961955555

🔹 Address 1: Signal road, around
Dinberwa Hospital

🔹 Addres 2: Wellosefer, Infront of
Dani Plaza

🚿 Low Shower Pressure? The Secret Is Air!

📌Many people think weak shower flow means low water supply, but often the real problem is trapped air in the pipeline or poor pipe layout.

🔴 Option A – Direct Pipe: Trapped air creates vacuum pockets that interrupt water flow, causing weak pressure.

🟢 Option B – Air Jar (Best Solution): Adding a vertical air vent allows trapped air to escape, letting gravity maintain smooth and strong water flow.

🔴 Option C – Too Many Bends: Multiple pipe bends increase friction loss, reducing both speed and pressure of water.

💡 Engineering Tip:
Good plumbing design reduces air pockets and pipe friction to maintain efficient water pressure.

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