👉Foundation Settlement refers to the downward movement of a building’s foundation due to changes in the underlying soil or loading conditions.

⏺It typically occurs when the soil beneath the foundation can no longer support the structure’s weight

🚧While some degree of settlement is normal , excessive or uneven settlement can compromise the integrity of the entire structure.

💫Engineers classify settlement into two main types: uniform settlement and differential settlement.

@etconp

👉Basic Roles & Responsibilities of a Site Engineer

🏷1. Supervision of Site Work

⏺Monitor all construction activities on the site.
⏺Ensure workers follow drawings, specifications, and instructions.
⏺Make sure work is done safely and correctly.

🏷2. Interpretation of Drawings

⏺Read and understand structural, architectural, and MEP drawings.
⏺Give instructions to workers based on the drawings.
⏺Report any discrepancies to the project manager or consultant.

🏷3. Quality Control

⏺Check the quality of materials before use (cement, sand, aggregates, steel, etc.).

⏺Ensure workmanship meets standards and project specifications.
⏺Conduct inspections at different stages: foundation, reinforcement, formwork, concreting, finishing, etc.

🏷4. Setting Out & Measurements

⏺Mark levels, alignments, and layout points on site.
⏺Measure and calculate quantities for materials and progress reports.
⏺Ensure the structure is built in the correct location and dimensions.

🏷5. Coordination

⏺Coordinate with subcontractors, laborers, supervisors, and suppliers.
⏺Ensure timely delivery of materials to avoid delays.
⏺Communicate with consultants and project managers about site issues.

🏷6. Site Safety

⏺Ensure workers use PPE (helmets, gloves, boots).
⏺Identify and eliminate hazards on site.
⏺Enforce safety guidelines during excavation, scaffolding, formwork, and electrical work.

🏷7. Documentation & Reporting

⏺Maintain daily site records (Daily Progress Report).
⏺Record manpower, materials used, equipment, and weather conditions.
⏺Prepare reports for inspections and approvals.

🏷8. Material Management

⏺Estimate required materials.
⏺Request materials on time and manage storage properly.
⏺Prevent wastage and theft.

🏷9. Concreting & Reinforcement Checks

⏺Check formwork dimensions, alignment, and supports.
⏺Verify reinforcement spacing, diameter, cover, and tying.
⏺Monitor mixing, placing, compaction, curing of concrete.

🏷10. Problem Solving

⏺Address issues that arise on site (design conflicts, material shortages, labor problems).
⏺Make quick decisions to keep work progressing.

🏷11. Ensuring Progress as per Schedule

⏺Plan daily/weekly activities.
⏺Follow the project schedule and push the work to meet deadlines.

@etconp

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ጥራትና ታማኝነት መለያችን ነው።
ታምራት ፕሌት እና ጄ ቦልት አቅራቢ

👉Certification of Inspection certificate:

🏷An inspection certificate cannot be certified before the work starts.

📜Why?

✅ 1. Inspection certificates confirm completed or inspected work

🚧An inspection certificate is issued after the inspector verifies that:

*Materials are correct

*Work is completed according to the drawing/spec

*Quality meets standards

*Safety and workmanship are acceptable

🚧If the work has not started, there is nothing to inspect.

❌ 2. Issuing before work begins is considered invalid

Certifying before work is done can:

*Create legal and contractual problems

*Hide quality issues

*Cause rejection by consultants/clients

*Be treated as falsification

✅ 3. What can be issued before work starts?

🚧Before work begins, only these can be issued:

*Inspection Request (IR) – mentioning “work ready to start”

*Method Statement

*Material Approval (MAR/MIR)

*Work Permit / Permit to Start Work

⭐ Recommendation

⏺If your team or contractor is asking for inspection certificate early, tell them:

💫Inspection certificate can only be signed after actual inspection.

⚡️Please complete the work or prepare the section for inspection first.”

@etconp

👉Do you Know About Curtain wall

💫Curtain walls are non-structural cladding systems for building exteriors — they resist weather and wind loads but do not carry floor or roof loads.

⏺They are usually made of aluminum frames with glass, metal panels, or thin stone infill.

🚧Here are the common types of curtain wall systems:

🧱 1. Stick System Curtain Wall

⏺Assembled piece by piece on site — vertical mullions (sticks) and horizontal rails (Transoms) are installed, then glass panels are fitted.

⭐️Advantages:

✅Flexible for on-site adjustments.
✅Suitable for low- to mid-rise buildings.


🏷Disadvantages:

✅Slower installation.
✅More affected by site weather conditions

🏗️ 2. Unitized (Modular) Curtain Wall

⏺Large prefabricated units (panels with glass already installed) are manufactured in a factory and delivered to site for quick installation. Or prepared in site work shop.

🏷Advantages are

✅Faster installation.
✅Better quality control (factory-made).
✅Ideal for high-rise buildings.


🏷Disadvantages:

✅Higher transportation and handling costs.
✅Requires cranes or hoists.

⏺Curtain wall designed by curtain wall engineers

⏺Load transfer mechanism curtain wall to frames by connections.

@etconp

👉ለባከነ የግንባታ ጊዜ ''የጊዜ ጉዳት መቀጫ''/Liquidated damage/

💫በኮንስትራክሽን ውል ላይ የውሉ የግንባታ ስራ ተብሎ የተቀመጠውን በዲዛይኑ እና ዝርዝር ስፔስፊኬሽኑ መሰረት በውሉ በተቀመጠው የጊዜ ገደብ ሰርቶ ማጠናቀቅ የተቋራጩ ሀላፊነት ነው፡፡

🚧ተቋራጩ የውሉን የግንባታ ስራ በውሉ በተቀመጠው የጊዜ ገደብ በወቅቱ ሰርቶ ያላጠናቀቀ እንደሆነ ከውሉ ማጠናቀቂያ ጊዜ/completion date/ በኋላ ግንባታው እስከሚጠናቀቅበት ጊዜ ድረስ ለእያንዳንዱ ቀን ተቋራጩ የግንባታ መዘግየት ምክንያት ለአሰሪው የጊዜ ጉዳት መቀጫ/Liquidated damage/ የመክፈል ሀላፊነት ይኖርበታል፡፡

🔰በውሉ በተቀመጠው የጊዜ ገደብ ሲባል ምን ማለት ነው?

⏺አንዳንድ አሰሪዎች/client/ በግንዛቤ እጥረት በውሉ ላይ የተቀመጠው ተቋራጩና አሰሪው ለግናባታው ማጠናቀቂያ የተስማሙበትን የቀን ብዛት/የጊዜ እርዝማኔ/ መቆጠር የሚጀምረው ውሉ በግራ ቀኙ ከተፈረመበት ቀን ጀምሮ እንደሆነ ይረዱታል፡፡ይሄ አረዳድ ስህተት ነው፡፡

🎲በኮንስትራክሽን ውል ስለ ጊዜ አቆጣጠር በተለይ

-የግንባታ ውል የተደረገበት ቀን/contract signing date/ ፣
-ሞቢላይዜሽን ፔሬድ/mobilization period/፣
-የሳይት መረከቢያ ቀን/site handover/፣
-የስራ መጀመሪያ ቀን/commencement date/ እና
-የስራ ማጠናቀቂያ ቀን/completion date/ የሚሉትን መረዳት የግንባታ የጊዜ የጉዳት መቀጫ/Liquidated damage/ የሚለውን በአግባቡ ለማወቅ ይጠቅማል፡፡

🚧በመሰረቱ በውሉ የተቀመጠው የስራ ማከናወኛ የጊዜ ገደብ መቆጠር የሚጀምረው ተቋራጩ የግናባታውን ሳይት ከአሰሪው ከተረከበ በኋላ ነው፡፡

⏺ይሄውም ከሳይት ርክክብ በኋላ የስራ መጀመሪያ ቀን /commencement date/ በመሀንዲሱ የሚወሰን እና ለተቋራጩ የሚገለጽለት ይሆናል፡፡

⏺እንግዲህ በመሀንዲሱ ከሚወሰነው የስራ መጀመሪያ ቀን ጀምሮ በውሉ ላይ የተቀመጠው ቀን ይቆጠርና የስራ ማጠናቀቂያ ቀን/completion date/ መቼ እንደሆነ ለማወቅ ያስችላል ማለት ነው፡፡

❇️እዚህ ላይ ሊታወቅ የሚገባው ነገር በኮንስትራክሽን ውሉ ላይ የተወሰነውን የስራ ክፍል ከውሉ የማጠናቀቂያ ጊዜ አስቀድሞ ለማጠናቀቅ ውል ሊደረግ የሚችልበት እድልም አለ፡፡
⏺/Partial completion/ ማለት ነው፡፡የቀን አቆጣጠሩ ከላይ እንደተብራራው የሚሰላ ይሆናል፡፡

🚧ስለሆነም የግንባታ መዘግየት ቅጣት የሚለው ጉዳይ የሚመጣው ተቋራጩ የውሉን የግንባታ ስራ በውሉ ስራ የማጠናቀቂያ ጊዜ /completion date/ ሳያጠናቅቅ የቀረ እንደሆነ ነው፡፡

⏺የገንዘብ ቅጣቱ የሚጣለው በተቋራጩ ላይ ነው፡፡ተቋራጩ ግንባታውን ላዘገየበት ለእያንዳንዱ ቀን በውሉ የተቀመጠውን የጊዜ ኪሳራ መቀጫየሚከፍል ይሆናል፡፡በነገራችን ላይ እየተቀጡ መስራት ለተቋራጩ መብትም ጭምር ነው፡፡ይህ ማለት አሰሪው የውሉ ማጠናቀቂያ ጊዜ ስላለቀ ውል አቋርጣለሁ ማለት አይችልም፡፡በውሉ ላይ የተቀመጠው የመዘግየት ቅጣት ጣሪያ መጠን ከሞላ በኋላ ግን አሰሪው ውል ማቋረጥ ይችላል፡፡ውል ከተቋረጠ በኋላ የመዘግየት ቅጣት የሚባል ነገርም የለም፡፡

📜ሌላው ተቋራጩ ወደ መዘግየት ቅጣት እንዲገባ ከመደረጉ አስቀድሞ በአግባቡ መረጋገጥ ያለበት ነገር መሀንዲሱ ለተቋራጩ የጊዜ ማራዘሚያ/Extension of Time / ፈቅዷል ወይስ አልፈቀደም የሚለው ነጥብ ነው፡፡ምክንያቱም ለተቋራጩ የጊዜ ማራዘሚያ ተፈቅዶለት ከሆነ የግንባታ ማጠናቀቂያ ጊዜውም አብሮ ስለሚራዘምና ቀኑ ስለሚቀየር ነው፡፡

⏺የሀገራችንን የህግ ማእቀፍ በዚህ ረገድ ምን ይላል? የሚለውን ለመመለስ በፍትሀብሄር ህግ አንቀጽ 1887 እስከ 1895 ድረስ የተደነገጉትን መዳሰስ ይጠይቃል፡፡

💫በፍትሀብሄር ህግ አንቀጽ 1889 ላይ ተዋዋዮች በውላቸው ምናልባት አንደኛው ወገን እንደውሉ ግዴታውን ያልፈጸመ እንደሆነ ወይም አጓድሎ የፈጸመ እንደሆነ ወይም አዘግይቶ የፈጸመ እንደሆነ የሚከፍለውን የመቀጮ መጠን አስቀድመው በውላቸው ለመወሰን እንደሚችሉ በሚፈቅድ መልኩ ተደንግጓል፡፡እዚህ ላይ የውል ግዴታን አዘግይቶ መፈጸም ስለሚያስከትለው ቅጣት የሚዋዋሉት በተለይ የግንባታ ጊዜ የጉዳት መቀጫ/liquidated damage/ የሚመለከት ይሆናል፡፡

⏺የመዘግየት ቅጣት ስምምነት ባለ ጊዜ አሰሪው የውሉ ስራ እንዲፈጸምና የቅጣት ገንዘቡንም ለመቀበል መብት እንደሚኖረው የፍ/ህ/ቁ 1890(2) ይደነግጋል፡፡እንደዚሁም አሰሪው ኪሳራ ባይደርስበት እንኳ የመዘግየት ቅጣት ገንዘቡ ሊከፈለው እንደሚገባ የፍ/ህ/ቁ 1892(1) ይደነግጋል፡፡እንግዲህ ተቋራጩ ግንባታውን በወቅቱ ያላጠናቀቀው አሰሪውን ሆነ ብሎ ለመጉዳት አስቦ ጉልህ በሆነ ቸልተኝነት ወይም በከባድ ጥፋት መሆኑ የተረጋገጠ እንደሆነ አሰሪው በውሉ ከተቀመጠው የቅጣት ገንዘብ በላይ በደረሰበት ትክክለኛ ጉዳት መጠን ልክ ከተቋራጩ ላይ ኪሳራ ለመጠየቅ እንደሚችል የፍ/ህ/ቁ 1892(2) ይደነግጋል፡፡

❇️ሌላው የመዘግየት ቅጣት መጠን በዳኞች ሊቀነስ የሚችልበት እድል ስለመኖሩ የፍ/ህ/ቁ 1893 ይደነግጋል፡፡ይሄውም ተቋራጩ ግዴታውን በከፊል የፈጸመ ሆኖ ሲገኝ ነው፡፡ይህ ማለት ተቋራጩ ባከናወነው ስራ ሁሉ ቅጣት የሚጣልበት አይሆንም ማለት ነው፡፡

⏺በዚህ ረገድ በሲቪል ግንባታ ስራዎች ቋሚ የውል መተዳደሪያ አንቀጽ 47(1) ላይ ተቋራጩ ስራውን በውሉ የማጠናቀቂያ ጊዜ ካላጠናቀቀ ለዘገየበት ለእያንዳንዱ ቀን የውሉን ዋጋ 1/1000 እንደሚከፍል እና ይሄውም አጠቃላይ መጠኑ ከውሉ ዋጋ ከ(10-20%)መብለጥ እንደማይችል ይደነግጋል፡፡ሆኖም ግን በከፊል ለተከናወነው ስራ መሀንዲሱ ማረጋገጫ ሰርተፍኬት በሰጠ ጊዜ የቅጣቱ መጠን የሚሰላው ባልተከናወነው ስራ መጠን ዋጋ ላይ በመመስረት ይሆናል ማለት ነው፡፡

▶️በመጨረሻም የመዘግየት ቅጣት በኛ ሀገር ከላይ እንዳየነው እንደቅጣት የሚቆጠርና በህጉ ቅጣቱ እውቅና የሚሰጠው ሲሆን በኮመን ሎው የህግ ስርአት ግን ቅጣት አይደለም፡፡

⏺በኮመን ሎው የጊዜ የጉዳት መቀጫ በአሰሪው ላይ ከደረሰው ጉዳት ጋር እኩል ሆኖ መመዛዘን የሚኖርበት ሲሆን የቅጣት አይነት ተመሳሳይ ባህሪ ካለው ተፈጻሚነት አይኖረውም፡፡

@etconp

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💫Please Subscribe & Help Us👇

https://youtube.com/@ethiopianconstruction?si=YPBAC3MRTl5Uu6BK

👉Concrete admixtures

💫Concrete admixtures are additives, either chemical or mineral, added to concrete during mixing to modify its properties, improving workability, durability, strength, and other characteristics. 

🏷Here's a more detailed explanation of concrete admixtures:

❇️What are Concrete Admixtures?

⏺Admixtures are substances other than water, aggregates, cement, and fibers used to modify the properties of concrete, both in its fresh (unhardened) and hardened (set) states. 
⏺They can be either chemical or mineral. 
⏺They are added to the concrete mix before or during mixing. 

📜Types of Concrete Admixtures:
Chemical Admixtures:

🎲Water-reducing admixtures: 

⏺Reduce the amount of water needed for a given concrete mix, improving workability and strength. 

🎲Superplasticizers: 

⏺Enhance workability and flowability of concrete, allowing for high-strength concrete without sacrificing workability. 

🎲Accelerators: 

⏺Speed up the setting and hardening of concrete, leading to faster strength gain. 

🎲Retarders: 

⏺Slow down the setting time of concrete, allowing for easier handling and placement, especially in hot weather. 

🎲Air-entraining agents: 

⏺Introduce small, controlled air bubbles into the concrete mix, improving its resistance to freeze-thaw damage. 

🎲Corrosion inhibitors: 

⏺Protect reinforcing steel from corrosion, extending the lifespan of concrete structures. 

🎲Shrinkage reducing admixtures: 

⏺Minimize drying shrinkage cracking in concrete. 

🎲Mineral Admixtures:
Silica fume: 

⏺A fine, pozzolanic material that improves durability, strength, and reduces permeability. 

🎲Fly ash: 

⏺A byproduct of coal combustion that can act as a pozzolan, improving concrete properties. 

🎲Ground granulated blast-furnace slag: 

⏺A pozzolanic material that can improve concrete durability and strength. 

⭐️Benefits of Using Admixtures:

🔰Improved Workability:

⏺Admixtures can make concrete easier to place, finish, and pump. 

🔰Enhanced Durability:

⏺Admixtures can improve concrete's resistance to freeze-thaw damage, chemical attack, and abrasion. 

🔰Increased Strength:

⏺Admixtures can help achieve higher concrete strengths, both early and at later ages. 

🔰Reduced Water Content:

⏺Water-reducing admixtures allow for a reduction in the water-cement ratio, leading to stronger and more durable concrete. 

🔰Cost-effectiveness:

⏺Admixtures can help optimize concrete mixes, potentially reducing overall project costs. 

@etconp

👉Avoid construction disputes

⏺Prevent conflicts before they start! Clear contracts, proper planning, and transparent communication are the keys to a smooth construction project.

⭐️How to Avoid
Construction Disputes.

📌Clear Contract

🔗Write down scope, timelines, and payments.

📌Document Everything

🔗Keep records of drawings, approvals, and materials.

📌Good Communication

🔗Talk regularly and share updates in writing.

📌Plan Properly

🔗Schedule work realistically and identify risks.

📌Manage Changes

🔗Record all changes with approvals and costs.

📌Check Quality

🔗Inspect work regularly and fix problems early.

📌Timely Payments

🔗Follow agreed payment schedule.

📌Follow Laws & Codes

🔗Ensure work meets legal requirements.

📌Resolve lssues Early

🔗Address small problems before they grow.

@etconp

👉ለኢተዮጵያ አርክቴክቶች ማህበር የስራ አስፈጻሚ ቦታዎች እራስዎንም ሆነ ሌሎችን ይጠቁሙ።

📜ዝርዝሩን ከታች በተያያዘው የማህበሩ ኦፊሴላዊ መግለጫ  ይመልከቱ።

🚧AEA Members, it's an Election Year! 🗳

⏺Nominations are now open for the upcoming Executive Committee positions as part of the 25th Convention & Annual General Assembly.

✔️ Self-nomination encouraged
✔️ Submit one nomination at a time
✔️ Nominate multiple people by reopening the link
✔️ Add contact details of nominees for follow-up

❇️Have someone in mind who would make a great EC member? Or ready to take the lead yourself?

🔗 Submit your nomination here:👇 https://forms.gle/AQXKSfGgAqvnqceC6

⭐️Let’s shape the future of our association together.

#AEA #ElectionYear #ArchitectsEthiopia #AGA25

@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

👉FORMWORK DISMANTLING:

💫Formwork dismantling, also known as stripping or striking, involves carefully removing the temporary molds used to shape concrete after it has hardened, ensuring the concrete structure is not damaged and that the formwork is handled safely. 

🏷Here's a more detailed breakdown of the process:

🚧1. Timing is Crucial:

Wait for Concrete to Cure: 
Formwork should only be removed after the concrete has gained sufficient strength to support itself.

📍Factors Affecting Curing Time: 

The exact time depends on the concrete mix, ambient temperature, humidity, and the structure's load-bearing requirements. 

Don't Rush: 
Removing formwork prematurely can lead to structural failure or damage. 

🚧2. Safe Dismantling Practices:

Systematic Approach: 
Develop a systematic method for releasing and lowering components in a controlled manner. 

Start from the Top: 
Remove the highest forms first, working downwards. 

Use Appropriate Tools: 
Use pry bars, hammers, or lifting equipment, as appropriate, to avoid damaging the concrete surface. 

Avoid Damage: 
Be careful not to damage the concrete, especially edges and corners. 

Maintain Structural Balance: 
Remove formwork on alternating sides to help maintain structural balance. 

Safety First: 
Use temporary platforms to minimize the risk of falls when stripping and ensure adequate lighting. 

Protect Workers: 
Protect workers from falling objects by setting up exclusion zones and installing warning signs. 

Curing After Removal: 
After removing the formwork, cover all exposed surfaces with polythene or wet hessian or ጆንያ to prevent moisture loss for about 5 days, so that the concrete is fully cured. 

🚧3. Specific Considerations:

Vertical Formwork:
Often removed by using pry bars, hammers, or lifting equipment, as appropriate. 

Horizontal Formwork:
May require props to be left under the slab until it gains sufficient strength. 

Bridge Formwork:
Follow specific procedures for dismantling steel formwork of bridges, including removing supports and arches in a controlled manner. 

Aluminum Formwork:
Follow specific procedures for construction and dismantling of aluminum alloy formwork, including removing diagonal supports and wall bolts. 

🚧4. Post-Dismantling:

Recycle or Dispose Responsibly:
If formwork is still in good condition, it may be reused for other parts of your project or stored for future projects. 

Clean and Store:
Clean up the removed formwork and accessories in time, and transport them to the same position on the upper floor and lay them flat. 

Maintenance:
Ensure the formwork is carefully handled at all times to maintain its value and operational readiness. 

Waste Removal:
Damaged material Boards shall be removed as per Ethiopian waste management procedures. 

@etconp

👉Factors influencing the strength of concrete

💫The strength of concrete is mainly affected by the quality of raw materials, cement content, water-to-cement ratio, concrete pressure during pouring, concrete life, and treatment conditions.

Any failure in these factors will result in weak mechanical resistance of concrete.

⭐️Major factors affecting the strength of concrete፦

1. Quality of Raw Materials

Cement: It must meet standard specifications and be stored in dry conditions. Any pollution or loss of quality diminishes strength.

Gravel (gravel and sand): Its shape, size, purity, clay and salts (chlorides, sulfates) are very important.

Water: Preferably drinkable, as contaminated water affects chemical reaction.

2. Water to Cement Ratio

As the percentage of water to cement increases, the gaps in the interior structure of concrete increase, thus the strength decreases.
The ideal ratio strikes a balance between maneuverability and pressure force.

If the percentage is too low, the concrete becomes hard of the blood, which also leads to weak strength

3. The Contents of  Cement

Increasing cement content (with consistency of water) reduces the content of water to cement, thus increases strength.

But too much cement can lead to shrinking and cracking problems.

4. Compaction of Concrete

Good blood removes air gaps and increases the density of concrete, improving its resistance.
Weakness of pressure leads to internal gaps that diminish strength.

5. The Age Of Concrete

Concrete gains most of its strength within 28 days of pouring.

Strength continues to increase with age if handled correctly

6. The Conditions of Curing

Curing Compounds are essential to retain moisture.

Untreated direct sun exposed concrete is much weaker than treated concrete.

📜Practical notes

⏺Untreated concrete under direct sun may be as strong as one quarter of the strength of water-treated concrete at 20°C.

❇️Therefore, processing and durability are the two most neglected workers on site, though they determine the quality of final concrete more than anything else.

@etconp

👉Main abbreviation in Construction engineering

1. BBS= Bar Bending Schedule

2. F.O.S= Factor of Safety

3. RCC = Reinforced Cement Concrete

4. PCC = plain cement concrete

5. NDT = Non destructive test

6. DL = Dead load

7. LL = live load

8. UDL = uniformly distributed load

9. FEM = finite element method

10. CAD = computer aided design

🙋 Question 💬

1️⃣. What’s EBCS

2️⃣. what’s BIM stands for

3️⃣. what’s FCR

4️⃣. What’s W/C ratio

5️⃣. What’s FM ?

6️⃣. What’s TMT ?

7️⃣. What’s Fck

8️⃣. What’s HYSD

@etconp