👉Statically Determinate vs Indeterminate Structures

📌 Statically Determinate Structures

• A structure is statically determinate if all internal forces and reactions can be found using only the three equations of equilibrium.
• These structures are simpler to analyze and often used for small spans or basic bridges.
• They become unstable if any member or support is removed.
• Common examples include simply supported beams and pin-jointed trusses.
• In Ethiopia, rural pedestrian bridges often use determinate truss systems for easy maintenance.

📌 Statically Indeterminate Structures

• A structure is statically indeterminate if the equilibrium equations are not enough to find all internal forces.
• These require additional compatibility conditions and material properties for analysis.
• They provide better performance in terms of load redistribution and stiffness.
• Examples include continuous beams, fixed-end frames, and rigid multi-story frames.
• ERA and EBCS recommend indeterminate designs for urban flyovers and seismic-prone buildings in Addis Ababa.

📌 Key Differences

• Determinate: Easier to analyze and cheaper to build but less safe under unexpected loads.
• Indeterminate: Harder to analyze but stronger, stiffer and safer under variable conditions.
• Design choice depends on safety, economy and expected structural behavior.

📌 How to Classify a Structure as Determinate or Indeterminate

1. Count the Unknowns (Reactions + Internal Forces)
• Identify all support reactions and internal forces (like axial force, shear, and moment).

• External reactions depend on support types:
  🧱 Hinge = 2 reactions, Roller = 1 reaction, Fixed = 3 reactions.

2. Apply the Equilibrium Equations

• In 2D structures:
  ΣFx = 0  ΣFy = 0  ΣM = 0 (Only 3 equations total)
• In 3D structures:
  ΣFx = 0  ΣFy = 0  ΣFz = 0  ΣMx = 0  ΣMy = 0  ΣMz = 0 (6 equations total)

3. Compare the Number of Equations and Unknowns

• If the number of unknowns = number of equations → Statically Determinate
• If unknowns > equations → Statically Indeterminate
• If unknowns < equations → Unstable (Mechanism)

4. Special Case for Trusses

• Use: m + r = 2j
  🧰 m = members, r = reactions, j = joints
• If the equation balances → Determinate Truss
• If left side > right side → Indeterminate
• If left side < right side → Unstable Truss

@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: Signal, around signal mall

👉የፌደራል መንግስት የልማት ድርጅቶችን የግዥ አፈፃፀም መመሪያ (1070/2017)

🚨ገንዘብ ሚኒስቴር በፌደራል መንግስት ባቤትነት የተያዙ የመንግስት የልማት ድርጅቶችን የግዥ  መመሪያ ዛሬ ይፋ አድርጓል።

🚨ይህ የግዥ መመሪያ (1070/2017) ከዚህ ቀደም  የመንግሥት የልማት ድርጅቶች በዳይሬክተሮች ቦርድ በማጸደቅ ሲጠቀሙበት የነበረው የግዥ አፈጻጸም መመሪያ የተለያዩ  ክፍተቶች ያለበት ከመሆኑም በተጨማሪ የተለያየ  ይዘት ያለው በመሆኑ ድርጅቶቹ የተሻሻለ እና ወጥ የሆነ የግዥ አፈጻጸም መመሪያ እንዲኖራቸው ለማድረግ የተዘጋጀ መሆኑን በመግቢያው ላይ ተገልጿል።

🚨በዚህ ዓመት አዲሱ የፌደራል መንግስት ግዥ እና ንብረት አስተዳደር አዋጅ 1333/2016 ይፋ ከሆነ በኋላ ይህ የፌደራል ልማት ድርጅቶች የግዥ መመሪያ አዋጁን መሰረት አድርጎ የወጣ ሶስተኛው የግዥ አፈጻጸም መመሪያ ነው።

👆የግዥ መመሪያውን አያይዘንላችኋል!

@etconp

👉በመዲናዋ የህንጻዎችን የታችኛው ወለል ለሌላ አገልግሎት አውለው የተገኙ 1 ሺ 210 የህንጻ ባለቤቶች ህግን ተከትለው እንዲሰሩ መደረጉ ተገለጸ

💫በከተማዋ የሚገነቡ ህንፃዎችን የታችኛው ወለል ለመኪና ፖርኪንግ እንዲያውሉ የሚያስገድድ ህግን ተላልፈው ከተገኙ 1 ሺህ 280 ህንፃዎች ውስጥ 1 ሺህ 210 በታችኛው የህንፃው ክፍላቸው የመኪና ማቆሚያ አገልግሎት እንዲሰጡ መደረጉን የአዲስ አበባ ትራፊክ ማኔጅመንት ባለስልጣን አስታወቀ፡፡

አንዳንድ የህንጻ ባለቤቶች ህጉን በመተላለፍ ታችኛውን የህንፃ ክፍል ለሱፐርማርኬት ፣ ለሆቴልና ለካፌ እንዲሁም መሰል የተሻለ ትርፍ ለሚያስገኙ አገልግሎቶች ሲያውሉ ቆይተዋል።

በዚህም በህንፃው ስር ሊቆሙ የሚገባቸው መኪኖች አስፋልት ዳር ለመቆም በመገደዳቸው በአካባቢው የትራፊክ መጨናነቅ ሲያጋጥም መቆየቱን የአዲስ አበባ ትራፊክ ማኔጅመንት ባለስልጣን ምክትል ዋና ስራ አስኪያጅ ኢንጂነር ኤልያስ ዘርጋ ለአዲስ ሚዲያ ኔትዎርክ ኤፍ ኤም 96.3 ራዲዮ ተናግረዋል፡፡

ቀሪ 70 የሚደርሱትን ቀሪ ህንፃዎችም በቀጣይ አመት አገልግሎቱን እንዲሰጡ ለማድረግ እንደሚሰራም አመልክተዋል ፡፡

ቀደም ሲል አገልግሎት ላይ የነበረው ደንብ ክፍተት እንደነበረው የጠቆሙት ምክትል ዋና ስራ አስኪያጁ የነበረውን የህግ ክፍተት በመቅረፍ በ2016 ዓ.ም ደንብ ቁጥር 165/2016 የፖርኪንግ አስተዳደር አዋጅ መውጣቱንና ደንቡ ከወጣ በኋላ ግን ውጤታማ ተግባራት መከናወናቸውን ተናግረዋል፡፡

ህግን ተላልፈው የፓርኪንግ ቦታውን ለሌላ አገልግሎት ካዋሉ 183 ህንፃ ባለቤቶችም በደንቡ መሰረት ተቀጥተው ከ18.3 ሚሊየን ብር በላይ ገቢ መሰብሰቡንም ነው ዋና ስራ አስኪያጁ የተናገሩት፡፡

Via Addis Media Network

@etconp

👉በግንባታ ዘርፉ የተሰማሩ አካላት ያላቸው የሥራ ፍላጎት አነስተኛ መሆን ዘርፉን ለሙስና እያጋለጠ ነው ተባለ

🚧የግንባታ ዘርፉን ለሙስና ከሚያጋልጡት ምክንያቶች ውስጥ ዘርፉ ላይ የተሰማሩ አካላት ለሥራው ያላቸው ፍላጎት አነስተኛ መሆኑ እንደሆነ የከተማና መሰረተ ልማት ሚኒስቴር አስታውቋል።

የሚኒስቴሩ የሕዝብ ግንኙነትና ኮሙኒኬሽን ሥራ አስፈፃሚ አቶ ኢትዮጵያ በዴቻ፤ በዘርፉ የተሰማሩ አካላት ያለባቸው የእውቀት ማነስና የውጪ ምንዛሬ እጥረት ለዘርፉ እድገት ችግር መሆኑን ተናግረዋል።

የግንባታ ዘርፉ ለሙስና ከሚጋለጡት መካከል የሚጠቀስ መሆኑን ያነሱት ኃላፊው፤ "ይህም የሆነበት ምክንያት ለሚሰራው ሥራ በሙሉ ፍላጎት ማገዝ የሚችሉበት አቅም እየተፈጠረ ባለመሆኑ ነው" ብለዋል። በዚህም በሙስናና ተያያዥ ምክንያቶች የግንባታው ዘርፍ በሙሉ አቅሙ በአግባቡ እየተሰራበት አለመሆኑን አንስተዋል።

በመሆኑም ሚኒስቴር መስሪያቤቱ ያሉትን ችግሮች በሙሉ አስወግዶ፤ ዘርፉ እንዲያድግ ከማድረግ አንፃር የተለያዩ አሰራሮችን እየተገበረ እንደሚገኝ ተናግረዋል።

በተያያዘም ኢትዮጵያ በኮንስትራክሽን ኢንዱስትሪ ውስጥ የጥሬ እቃ ወይም የግብዓት የአቅም ችግር እንደሌለባት የገለጹት ሥራ አስፈፃሚው፤ እንደ ሀገር ከፍተኛ የሆኑ ግብዓቶች ስለመኖራቸው ተናግረዋል።

ነገር ግን ግብዓቶችን ከመጠቀም አንፃር ውስንነቶች መኖራቸውን አንስተው፤ የግንባታ ግብዓት አቅርቦትን በሀገር ውስጥ ለመተካት በስፋት እየተሰራ እንደሚገኝ አስታውቀዋል።

የግንባታ ዘርፉ የሕንጻ ግንባታ፣ የመንገድ ሥራ፣ የውሀ ሥራዎችና ሌሎች የግንባታ ሥራዎችን የሚያካትት ሲሆን፤ ከፍተኛ ሀብት የሚፈስበት እንደመሆኑ መጠን ለሙስናና ብልሹ አሰራሮች ተጋላጭ መሆኑ በተደጋጋሚ ይነገራል፡፡

Via አሐዱ ሬዲዮ

@etconp

ታምራት  ፕሌት እና ጄቦልት አቅራቢ

📌ፕሌትና ጄቦልት በፈለጉት አይነት የተዘጋጀ አለን

📍ኢትዮጵያ ዉስጥ የትም እንልክሎታለን


0904040477
0994941708

👉Pile Testing

💫A. Pile load tests shall be conducted to provide data regarding the load-deformation characteristics of the pile up to failure or ultimate load, and to determine or establish the safe design pile capacity.

💫B. The head of the test pile shall be brought to the required level and provided with a pile cap having a level and plane surface with adequate space for proper seating of the jack and dial gauges.

🚧Types of Pile Load Tests

⏺a. Static Axial Compressive Load Test
⏺b. Static Axial Tension Load Test
⏺c. Lateral Load Test
⏺d. High-Strain Dynamic Testing of Piles
⏺e. Low-Strain Sonic Integrity Testing on Working Piles

⭐️Magnitude of Test Loads on Piles

⏺A. Test piles shall be tested up to failure or 250% of the working load, whichever occurs first.
⏺B. Working piles identified for testing shall be tested up to failure or 150% of the working load, whichever occurs first.

❇️Standards for Pile Load Testing

⏺Static Axial Compressive Load Test → To be carried out in accordance with ASTM D1143.
⏺Static Axial Tension Load Test (Pull-Out Test) → To be conducted in accordance with ASTM D3689.
⏺Lateral Pile Load Test → To be performed as per ASTM D3966 and BS EN 1997.

@etconp

👉አስደሳች ዜና ለዚህ ቻናል ቤተሰቦች

💫የ "Quantity Surveying" Full Course ኦንላይን ላይ በ አማርኛ ቋንቋ መማር የምትፈልጉ ተማሪዎች እና የ ኮንስትራክሽን ባለሞያዎች ኣንደኛ ዙር በተመጣጣኝ ዋጋ ለጥቂት ተማሪዎች ምዝገባ ጀምረናል
               
🔥 ይህ ስልጠና ምን ምን ትምህርቶችን ያካትታል?
💫Takeoff sheet
💫Bill of Quantity(BOQ)
💫Payment Certificate

🏷በዘርፉ ብዙ አመታትን ባስቆጠሩ መምህራን ስልጠናውን ለመስጠት ዝግጅቶቻችንን ጨርሰን እርሶን በመጠባበቅ ላይ እንገኛልን ስለዚህ ዛሬ ነገ ሳይሉ ፈጥንው በመመዝገብ እራሶዎትን በትምህርት አዳብረው በቀላሉ ወደ ስራው እንዲቀላቀሉ አንርዳዎት እንላለን።

📍ታዲያ ምን ይጠብቃሉ ያለን ቦታ ውስን በመሆኑ ቀድመው ቦታ በመያዝ ይመዝገቡ                       

📩መመዝገብ የምትፈልጉ @Philemona7 ወይም ለበለጠ መረጃ በ 0925446661 ደውለው ያግኙን🙏

@etconp

👉Microsoft Project Vs Primavera P6

💫In construction scheduling, two names stand out Microsoft Project and Primavera P6.

🎲Both are powerful, but they serve different needs on site and in the office.

🌟Complexity

⏺MS Project is simpler and faster to learn.

⏺P6 is more advanced, built for complex, multi-phase projects.

🌟Project Scale:

⏺MS Project suits small to mid-sized jobs (residential, small commercial).

⏺Primavera P6 handles massive infrastructure and multi-site programs.

🌟Resource & Cost Control

⏺P6 Supports detailed cost codes, resource curves, and EVM.

⏺MS Project is basic—enough for simple tracking, but not for deep analysis.

🌟Multi-Project Management

⏺P6 manages large portfolios with EPS/WBS structures.

⏺MS Project is limited without add-ons.

🌟Collaboration

⏺MS Project syncs well with Office 365 and Teams.

⏺P6 supports enterprise-level access, roles, and permissions.

🚧For handling complex

⏺construction projects, which tool do you find most reliable—MS Project or Primavera P6?

📩Write Your Opinion On Coment Box 👇

@etconp

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👉Types of Structures in Construction

🚧Every structure in construction whether it’s a bridge, roof, wall, or slab has one main purpose, to carry loads safely.

🎲But what many overlook is that each structure carries these loads differently, depending on the type of internal stress it’s built to resist.

💫Tension Structures

⏺These are structures that mainly carry load by being stretched.

⏺The members of tension structure are subjected to pure tension under the action of external loads.

⏺Under this category Suspension bridges, cable roofs, and tents are included.

⏺They are lightweight and need strong anchor points.

💫Compression Structures

⏺These are made to carry loads by being compressed.

▶️Think of a concrete column or an arch  the weight pushes down, and the structure holds firm.
But if they’re too slender, they can buckle or fail.

💫Trusses

⏺Trusses are composed of straight members connected at their ends by hinged connections to form a stable configuration.

⏺When the loads are applied to a truss only at joints, its members either elongate or shorten.

💫Shear Structures

⏺Shear structures (mostly reinforced concrete shear walls) are used in multistory buildings to reduce lateral movements due to wind loads and earthquake excitations.

⏺They develop mainly in-plane shear, with relatively small bending stresses under the action of external loads.

💫Bending Structures

⏺They develop mainly bending stresses under the action of external loads.

⏺In some cases the shear stresses associated with the changes in bending moments may also be significant and should be considered in their designs.
Some of the most commonly used structures include, beams, rigid frames, slabs and plates.

⏺Knowing the type of structure helps us choose the right material, right size, right connection detail and design safe buildings.


@etconp

👉Difference Between CONSTRUCTION Joints and EXPANSION Joints

🔰Expansion joints and construction joints are two types of joints used in concrete construction, but they serve different purposes and have distinct characteristics.
‎
🏷EXPANSION JOINT

⭐️‎1. PURPOSE : Accommodate thermal expansion and contraction of concrete due to temperature changes.
‎
⭐️‎2. LOCATION : Typically placed at regular intervals (e.g., 15-20 meters) in long, straight sections of concrete, such as roads, runways,walls, or building floors.
‎
⭐️‎3. DESIGN/ORIENTATION : Usually consists of a gap (e.g., 10-20 mm) filled with a flexible sealan.
‎
⭐️‎4. FUNCTION : Allows the concrete to expand and contract without causing stress or damage to the surrounding structure.
‎
‎🏷CONSTRUCTION JOINT

💫‎1. PURPOSE : Separate concrete pours, allowing for construction to proceed in stages.
‎
💫‎2. LOCATION/ORIENTATION : Typically placed at the end of a concrete pour, where the next pour will begin.
‎
💫‎3. DESIGN : Usually consists of a keyed joint (e.g., a roughened surface) to ensure a strong bond between the two concrete pours.
‎
💫‎4. FUNCTION : Allows for the construction process to be broken down into manageable sections, while maintaining the structural integrity of the concrete.

‎ @etconp