የፌደራል መንግሥት ግዢና ንብረት ባለስልጣን አሻሽሎ ያወጣው 192 ገጽ ያለው የፌደራል መንግሥት ግዢ አፈፃፀም ማኑዋል

https://t.me/ETCONpWORK

@etconp

የኦሮሚያ ክልል ግዥ አዋጅ
በኦሮሚያ ክልላዊ መንግስት በስራ ላይ ያለው የግዥ አዋጅ አያይዘንላችኋል

https://t.me/ETCONpWORK

@etconp

👉In building construction, a roof structure is made up of several key components that work together to support loads, protect the building, and drain rainwater.

🚧The main components are:

💫1. Structural Members (Load-Bearing Parts)

These carry the weight of the roof and transfer loads to walls or columns.

Roof Truss – A triangular framework (wood or steel) that supports the roof over large spans
Rafters – Sloping members that support the roof covering
Beams / Purlins – Horizontal members that support rafters or roof sheets
Tie Beams / Ceiling Joists – Prevent the roof from spreading and may support ceilings

💫2. Roof Decking / Sheathing
Roof Slab (in RCC roofs) –

Reinforced concrete slab forming the roof

Decking / Boards / Sheets – Base layer fixed on rafters or purlins (wood, metal, or concrete)

💫3. Roof Covering (Weather Protection)

This protects the building from rain, sun, and wind.

Corrugated metal sheets
Clay or concrete tiles
Shingles

Roofing membranes (for flat roofs)

💫4. Insulation Layer

Reduces heat transfer and improves comfort
Common materials: foam boards, fiberglass, mineral wool

💫5. Waterproofing Layer

Prevents water leakage
Includes membranes, bitumen layers, or coatings (especially in flat roofs)

💫6. Drainage Components

Gutters – Collect rainwater
Downpipes – Carry water to the ground or drainage system
Roof slope – Directs water flow

💫7. Roof Finishing & Accessories

Fascia board – Covers rafter ends
Eaves & Overhangs – Protect walls from rain
Flashing – Seals joints and edges
Ridge & Hip caps – Cover roof intersections

💫8. Ceiling (Optional but Common)

Fixed below the roof structure for aesthetics and insulation
Made of gypsum board, PVC, or wood panels

@etconp

👉የሥራ ተቋራጭ (Contractor) የሕግ ተጠያቂነት

🚧በኮንስትራክሽን ውል ሁለት አይነት የግንባታ ስራ ርክክቦች ያሉ ሲሆን እነሱም  ግዚያዊ ርክክብ እና የመጨረሻ ርክክብ በመባል ይታወቃሉ፡፡

🏷1/ ግዚያዊ ርክክብ

⏺ግዜአዊ ርክክብ በተለይ በኮንስትራክሽን ውል የተመለከቱ የግንባታ ስራዎች ተከናውነው ካበቁ በኋላ ወዲያውኑ ሁለቱ ወገኖች ማለትም አሰሪውና ተቋራጩ ባሉበት በስራው ላይ የሚደረግ የምርመራ ማረጋገጫ ነው:: (የፍትሀብሄር ህግ አንቀጽ 3274(1)):: ይሄውም አሰሪው በትክክል የተገነባውን ግንባታ በእጁ አግብቶ መያዙን ጭምር ያረጋግጣል፡፡
⏺ስለዚህ ጊዜአዊ ርክክብ በዋናነት የተሰራውን የግንባታ ስራ አሰሪው መብቱን ጠብቆ በመጀመሪያ የሚረከብበት ሂደት ነው፡፡  በስራው ላይ ምርመራ መደረጉንም የሚያረጋግጥ ነው፡፡

⏺እንግዲህ ስራው ከተመረመረ በኋላ አሰሪው ያላመነበትን ግንባታ ፈርሶ እንደገና እንዲሰራ ወይም እንዲጠገን ተደርጐ የጥራት ደረጃውን ባሟላ ሁኔታ እንዲከናወን ለማዘዝ እንደሚችል ፒፒኤ ክሎስ 85 ይፈቅድለታል:: በዚህም መሰረት ግንባታው የስራ ምርመራውን ካለፈ አሰሪው ግንባታውን የሚረከበው ይሆናል፡፡

🏷2/ የመጨረሻ ርክክብ
የመጨረሻ ርክክብ/Final Acceptance/

⏺በተለይ የድህንነት ጊዜ ካለቀ በኋላ እና ተቋራጩ ጠቅላላ ግዴታዎቹን በደህና ሁኔታ የፈጸመ መሆኑን አሰሪው ሲያረጋግጥ ግንባታውን ሙሉ በሙሉ በእጁ የሚያደርግበት ስለመሆኑ የፍትሀብሄር ህግ አንቀጽ 3279 ይደነግጋል፡፡

⏺የመጨረሻ ርክክብ አሰሪውና ተቋራጩ ባሉበት በጽሁፍ መደረግ እንዳለበት በአስገዳጅ ሁኔታ በፍትሀብሄር ህግ አንቀጽ 3279(2) ላይ ተደንግጓል፡፡ 

⏺በፍትሀብሄር ህግ አንቀጽ 3282 ላይ እንደተቀመጠው ከመጨረሻ ርክክብ በኋላ ተቋራጩ እስከ 10 አመት ድረስ ስለስራው አሰራር ጉድለት ተቋራጩ ሀላፊነት አለበት ፣ ለስራው ጥራት መድህን ሆኖም ይቀጥላል፡፡ ስለሆነም በሀዋሳ ዩኒቨርሲቲ የተደረመሰውን ድልድይ የገነባው ሥራ ተቋራጭ ለደረሰው ጉዳት በሕግ ተጠያቂ የሚሆንበት አግባብ ሊኖር ይችላል:: ይሁን እንጂ በመጨረሻ ርክክብ ወቅት የሚታዩ ለነበሩ የጥራት ጉድለቶች ተቋራጩ ሀላፊነት የለበትም፡፡

@etconp

👉Soil Bearing Capacity

💫1. Bearing Capacity

⏺Bearing capacity is the ability of soil to support the loads coming from a foundation without shear failure or excessive settlement.

💫2. Ultimate Bearing Capacity (qu)

⏺Ultimate bearing capacity is the maximum pressure that soil can withstand just before failure occurs.

⏺Terzaghi’s equation (for strip footing):
qu = cNc + γDfNq + 0.5γBNγ

💫3. Safe Bearing Capacity (qs)

⏺Safe bearing capacity is the allowable pressure on soil obtained by dividing the ultimate bearing capacity by a factorof safety.

qs = qu / FOS

@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

ታምራት  ፕሌት እና ጄቦልት አቅራቢ

📌ፕሌትና ጄቦልት በፈለጉት አይነት የተዘጋጀ አለን

♧ ሁሉን በአንድ ቦታ ለሁሉም ቅርብ

📍ኢትዮጵያ ዉስጥ የትም እንልክሎታለን

♧ ይደውሉልን ያማክሩን

0904040477
0911016833

👉FIDIC Books Explained — The Colors of Construction Contracts

🚧In the world of construction and engineering, contracts are not about mistrust — they’re about mutual understanding.
FIDIC’s “rainbow” of contract books helps align responsibilities, risks, and expectations across projects worldwide.

🔴 Red Book – Construction (Employer-Designed)
Employer designs, Contractor builds. Best for roads, bridges, and fixed-design infrastructure. Risk: Employer-heavy.

🟡 Yellow Book – Plant & Design-Build
Contractor designs & builds. Ideal for MEP-heavy and industrial projects. Risk: Contractor-heavy (design).

⚙️ Silver Book – EPC / Turnkey
Contractor delivers ready-to-operate projects. Fixed price, fixed time. Risk: Contractor-heavy.

✨ Gold Book – Design, Build & Operate (DBO)
Contractor designs, builds, and operates long-term. Perfect for PPPs and water treatment plants. Risk: Shared lifecycle.

🟢 Green Book – Short Form
Simplified for small, fast projects. Risk: Balanced.

🔵 Blue Book – Dredging & Reclamation
Tailored for marine and hydraulic works. Risk: Environmental/geotechnical shared.

⚪ White Book – Client–Consultant Agreement
Defines consultant scope, fees, and liability. Risk: Professional liability.

💗 Pink Book – MDB Edition
Adapted Red Book for projects funded by multilateral banks. Risk: Balanced with compliance.

@etconp

👉Short Column Vs Long Column

🚧Short Column

⏺1.Slenderness ratio (L/r) < 12.

⏺2.Failure occurs due to crushing (compression).

⏺3.High load-carrying capacity.

⏺4.Common in low-rise buildings.

⏺5.Strength mainly depends on material strength (concrete/steel).

🚧Long Column

▶️1.Slenderness ratio (L/r) > 12.

▶️2.Failure occurs due to buckling (instability).

▶️3.Lower load-carrying capacity compared to short columns.

▶️4.Common in tall structures.

▶️5.Strength mainly depends on slenderness ratio and buckling effect.

📜Summary:

💫Short column → Crushing failure

💫Long column → Buckling failure

@etconp

👉what type of glass used for curtain walls and why?

💫Curtain walls primarily use insulated glass units (IGUs), especially with low-emissivity (Low-E) coatings, for their thermal performance and energy efficiency.

⏺Other common types include tempered glass and laminated glass for safety and durability.

⏺The specific glass is chosen based on performance needs like energy conservation, glare reduction, safety, and sound insulation. 

🚧Insulated Glass Units (IGUs): Also called double or triple glazing, these units have at least two panes of glass with a sealed space between them filled with air or an inert gas.

▶️Why: This design provides excellent thermal insulation, reducing heating and cooling costs, and offers sound dampening.

🚧Tempered Glass: This is glass that has been heat-treated to increase its strength.

🏷Why: It is much stronger than regular glass and, when it does break, it shatters into small, relatively harmless pieces, making it a crucial safety feature.

🚧Laminated Glass: This is made of two or more layers of glass with a plastic interlayer, such as polyvinyl butyral (PVB), sandwiched between them.

⏺Why: It offers enhanced security and impact resistance, as the interlayer holds the glass fragments together if it breaks, and also provides better sound insulation.

🚧Low-E Coatings: These are microscopically thin, transparent coatings applied to one or more glass surfaces, usually within an IGU.

⏺Why: Low-emissivity (Low-E) coatings reflect infrared light, which keeps heat inside during the winter and outside during the summer.

⏺This significantly improves a building's energy efficiency and thermal performance.

@etconp