👉EARTH PRESSURE AND RETAINING STRUCTURE

🏷A retaining structure is a wall used to maintain the ground surface at different elevation on either side of it.

💫The following terms are used:

1. Back fill: The material retained by the wall is called back fill.

2. Surcharge: The weight of back fill above the elevation of top of the wall and any other load (may be due to building, etc.) is called surcharge.

3. Back face and face: The side of wall in contact with back fill is back face and other side face.

4. The slope of back fill above the horizontal is known as surcharge angle.

5. Angle of inclination of the back is the angle made by back face with vertical.

❇️Earth Pressure as per Rankine’s Theory: The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill is called lateral earth pressure at rest.

⏺The lateral earth pressure when the retaining wall tends to move away from the back fill is called active earth pressure.

⏺This is the minimum earth pressure exerted by the soil when the retaining wall moves towards the back fill due to any natural cause is known as passive earth pressure.

🎲Coefficient of earth pressure at rest: It is the ratio of lateral pressure to vertical pressure.

@etconp

👉Construction SAFETY

⚡️Construction safety encompasses the measures taken to protect construction workers and others from injuries, illnesses, and fatalities on construction sites.

⏺It involves a combination of practices, including proper training, the use of personal protective equipment (PPE), hazard identification and control, and emergency preparedness.

Effective safety management in construction is crucial due to the inherent risks associated with heavy machinery, working at heights, and handling hazardous materials. 

💫Here's a breakdown of key aspects of construction safety:

1. Personal Protective Equipment (PPE): 

PPE is essential for minimizing risks from hazards like falling objects, noise, and hazardous materials. Common PPE includes hard hats, safety glasses, earplugs, gloves, and safety boots. Regular inspection and maintenance of PPE are crucial to ensure its effectiveness.

2. Hazard Identification and Control:

Identifying potential hazards like working at heights, electrical hazards, and hazardous material handling is crucial. Controlling hazards involves implementing measures like fall protection systems, proper electrical wiring, and safe material handling procedures. Training workers to recognize and mitigate hazards is a vital part of the process. 

3. Training and Education:

The Occupational Safety and Health Administration (OSHA) requires specific safety training, such as the 10-hour and 30-hour construction courses. Training should cover topics like electrical safety, fall protection, and hazard communication. Regular safety meetings and toolbox talks can reinforce safe work practices. 

4. Equipment and Machinery Safety: 

All equipment should be inspected regularly for defects and proper functioning. Workers operating equipment must be properly trained and authorized. Emergency shutdown mechanisms should be in place and tested.

5. Site Safety Management:

Construction safety management involves a systematic approach to identifying, assessing, and controlling hazards. This includes developing safety policies, conducting risk assessments, and implementing safety assurance programs. A positive safety culture, where workers prioritize safety, is essential for a safe work environment. 


6. Emergency Preparedness: 

Developing emergency plans for foreseeable scenarios is crucial.
These plans should outline procedures for situations like fires, injuries, or hazardous material spills. Workers should be familiar with emergency procedures and have access to necessary resources.

7. Communication: 

Clear and timely communication is essential for preventing accidents.
Workers should be able to communicate with each other effectively, using signals, radios, or other means. Miscommunication can lead to accidents and confusion.

By implementing these measures, construction companies can create safer work environments for their employees and minimize the risk of accidents and injuries on construction sites. 


@etconp

👉የፌደራልና የክልል የግዥ ህጎች የተፈፃሚነት ወሰን (Scope of Application)

⏺አዲሱ የፌደራል ግዥ አዋጅ እና መመሪያ ተፈፃሚ የሚሆነው በፌደራል መንግስት ተቋማት ለሚከናወኑ ግዥዎች ብቻ ነው።

⏺ክልሎችና ከተማ አስተዳደሮች ላይ ተፈፃሚነት የለውም።

⏺በቀጣይ አዲስ አበባን ጨምሮ ሁሉም ክልሎች የራሳቸውን የተሻሻለ የግዥ አዋጅና መመሪያ እንደሚያወጡ ይጠበቃል (አዲስ አበባ በረቂቅ ደረጃ ይገኛል)።

⏺ሁሉም ክልሎችና ከተማ አስተዳደሮች አዲስ ህግ እስከሚያወጡ ድረስ በነባሩ የሚቀጥሉ ይሆናል።

@etconp

#ADVERTISEMENT

🏭🏠TSEGAYE and YOHANNES J-ቦልት & PLATE 🏚🏗 🌁🌆

🧿 OUR SERVICES ⤵️

🔲Plate

⚙️  J-Bolt

⚓Anchor Bolt

➽Tie Rod

🏭🛖🌉scrap🚧🪝🔗
Phone : 🤳0938494506 
              🤳 0951087077
              🤳 0929044037
እናመሰግናለን::
👉አድራሻ፦  መርካቶ ምንአለሽ ተራ ከጭድ ተራ ከፍ ብሎ

https://t.me/tsegaye2016Jbolt

👉Road Pavement are of two types

1) Rigid pavement
2) Flexible pavement

A)Rigid pavement have high flexural stiffness and consist of 3 layers

--Subgrade
--Base course
--Concrete slab

B) Flexible pavement have low flexible stiffness and consist of four layers

--Subgrade
--Sub-base
--Base course
--Asphalt

In addition flexible pavement also have Prime coat and Tackcoat applied within the structure of pavement.

Prime coat:The layer between Asphalt course and crushed aggregate.

This help to bind the loose aggregates so that it can be prepared for subsequent construction activity. It also serves the purpose of blocking upward movement of water that is capillary action thereby protecting the asphalt layer.

Tack coat: The layer between Asphalt base course and Asphalt wearing course. The purpose is to form a bound between Asphalt base course and Asphalt wearing course. If Tack coat is not applied, AWC will tend to slid under traffic load and pavement will fail.
Note: AWC should be laid over the ABC after Tack coat has dried and become "Tacky".

@etconp

👉ቴክኒካዊ የሙያ ቃላት በአማርኛ ሲጻፉ

Spatial የሚለው የኪነ ህንጻ ቃል "ስፓሻል" ሳይሆን "ስፔሻል" ተብሎ የሚነበብ ሲሆን ብዙ አማርኛ ተናጋሪ ባለሙያዎች በዚህ መልኩ ማስተካከል ይኖርባቸዋል።

@etconp

👉JOB VACANCY

💫Architect with graphic design

📍አዲስ አበባ, ኢትዮጵያ

⚡️ቀነ ገደብ: July 6, 2025

📜የሥራ መግለጫ

⏺We are looking for a creative Architect with graphic design skills and at least 2 years of experience.
⏺The role involves architectural and interior design, project management, and enhancing visual presentations with graphic design.
⏺Interest or experience in furniture design is a plus.

🚧Key Responsibilities:

⏺Design architectural plans for residential, commercial, and institutional projects Handle interior and furniture design projects Manage timelines, budgets, and site work
Conduct site surveys and estimate finishing materials (e.g., doors, cabinets)
⏺Create graphics for marketing and presentations

⭐️Qualifications:Bachelor's degree in Architecture

⏺Proficiency in AutoCAD, SketchUp, Revit, rendering software Strong graphic design skills (Adobe Photoshop, Illustrator, InDesign) Creative, detail-oriented, and organized
Strong management and communication skills

📍Location:  ከመካኒሳ ወደ ጀርመን በሚወስደው መንገድ ላይ

🎲Salary: 12,000 Birr

📩ለማመልከት በዚህ ሊንክ ይላኩልን👇

https://forms.gle/4LgkRmoKFun5eRnbA

@etconp

👉INVITATION FOR BID

IFB Reference No. ECWCT/NCB/PG/120/2017
————-
The Ethiopian Construction Works Corporation (ECWC) hereby invites registered eligible bidders for SUPPLY DIFFERENT TYPES SANTERY FIXTURE MATERIALS for (3+G+34 ECX)under National Competitive Bidding -NCB).
1.  Interested Potential Bidders are required to present renewed relevant Trade License for the fiscal year, VAT Registration Certificate, Tax Clearance Certificate, Online Supplier list Registration Certificate.

2.  Bidding document should be prepared in English language.

3.  Interested Potential Bidders obtain a complete set of bidding document from the office of Procurement department against payment of none refundable fee of Birr 400.00 upon presentation of Trade License renewed for the fiscal year; VAT Registration Certificate, Tax Clearance Certificate and Online Supplier list Registration Certificate.

4.  This invitation of bid is open to all interested potential bidders regardless of their nationality and the bid evaluation and award shall be determined in accordance with the provision indicated in bidding document.

5.  The deadline for bid Submission shall be on July 10,2025 at 03:00 PM
6.  Bid must be accompanied with a Bid Security of an amount of Birr 200,000.00 (Two hundred thousand) in the form of certified cheque (CPO) or Bank guarantee.

7.  Bids must be delivered or deposited in the Tender Box situated at the office of the Procurement Department, before the closing date and time.

8.  Bids will be opened on July 10,2025 at 03:00 PM. In Ethiopian Construction Works Corporation Procurement Department office, in the presence of bidders and/or their representatives who choose to attend.

9.  The Ethiopian Construction Works Corporation reserves its rights to reject any or all bids.

10.  Bidders may get further information at the following address: 

Ethiopian Construction Works Corporation.

P. O. Box 21952/1000, Addis Ababa, Ethiopia

Gurd Sholla, In front of Andinet International School

Telephone No. 011 8 96 29 91/011 8 67 80 89/

@etconp

👉INVITATION FOR RE-BIDIFB.No. ECWCRT/NCB/PG-42/2017
---------------
The Ethiopian Construction Works Corporation (ECWC) hereby invites registered eligible bidders for Supply Gym Rubber flooring & floor carpet for FQRA 4B+G21+ HQ projects.Interested Potential Bidders are required to present renewed relevant Trade License for the Ethiopian fiscal year, VAT Registration Certificate, Tax Clearance Certificate and Online Supplier list Registration Certificate together with the offer.

Bidding document should be prepared in English language.Interested Potential Bidders obtain a complete set of bidding document from the office of Local Bulk Procurement Team payment of none refundable fee of Birr 400.00 upon presentation of Trade License renewed for the fiscal year.This invitation of bid is open to all interested potential bidders regardless of their nationality and the bid evaluation and award shall be determined in accordance with the provision indicated in bidding document.

The deadline for bid Submission shall be on  July 2 /2025, at 2:00 PMBid must be accompanied with a Bid Security of an amount Birr 100,000.00 (One hundred thousand birr) in the form of (CPO) or unconditional Bank guarantee. Bid Bond in the form of insurance bond or in any other form shall not be accepted.Bids must be delivered or deposited in the Tender Box situated at the office of the national Bulk Procurement Team, before the closing date and time.Bids will be opened on July 2 /2025, at 2:30 PM.

In Ethiopian Construction Works Corporation Procurement Department conference room, in the presence of bidders and/or their representatives who choose to attend.

The Ethiopian Construction Works Corporation reserves its rights to reject any or all bids.Bidders may get further information at the following

address:Ethiopian Construction Works Corporation.National Bulk Procurement team

P. O. Box 21952/1000, Addis Ababa, Ethiopia

Telephone No. 0118-96 29 91

Address; Gurd Shola behind Athletics FederationIn Front of Adinet International College

@etconp

👉Invitation to Bid Tender No.

ECWCT/NCB/PSW/106/2017The Ethiopian Construction Works Corporation (ECWC) here by invites registered eligible bidders For the Procurement of Supply, Install & Commission Water Pumps And related works under national competitive bidding (NCB).

1. Interested Potential Bidders are required to present renewed relevant Trade License for the fiscal year, VAT Registration Certificate, Tax Clearance Certificate and Online Supplier list Registration Certificate together with the offer.

2. Bidding document should be prepared in English language.

3. Those bidders willing to participate for supply of any type of tonner must accompanied the bid with manufacturer authorization letter or manufacturer license.

4. Interested Potential Bidders obtain a complete set of bidding document from the Procurement Office with Payment of none refundable fee of Birr 400.00(Four hundred birr).

5. This invitation of bid is open to all interested potential bidders regardless of their nationality.

6. Bid must be accompanied with a Bid Security an amount of Birr 300,000.00(Three hundred thousand birr only) in the form of certified check (CPO) or Bank guarantee. Bid Bond in the form of insurance bond or in any other form shall not be accepted.

7. Bids must be delivered or deposited in the Tender Box situated at the office of the Procurement dep’t, before the closing date and time.

8. The deadline for bid Submission shall be on June 19, 2025 at 10:00 A.M.

9. Bids will be opened on June 19, 2025 at 10:30 A.M.   in Ethiopian Construction Works Corporation Procurement Department conference room, in the presence of bidders and/or their representatives who choose to attend.
10. The Ethiopian Construction Works Corporation reserves its rights to reject any or all bids.
11. Bidders may get further information at the following

address:Ethiopian Construction Works Corporation.

Gurd Shola behind Athletics federation building and       Infront of Andinet international College

P. O. Box 21952/1000 

Telephone 011 8 96 29 91/
01118 67 80 89

Fax No. 251-11-6 67 60 90                                                    

Addis Ababa, Ethiopia

@etconp

👉የ ቻናል ጥቆማ

ስለ ቴክኖሎጂ እና AI እውቀት የምታገኙበት ከፈለጉ ከታች ባለው ቻናል ይቀላቀሉ👇

https://t.me/AfriTech27

👉Common Mistakes in Concrete and How to Avoid it

🏷Concrete is one of the most widely used building materials in the world. It’s strong, versatile, durable, and relatively inexpensive.

⏺From skyscrapers to sidewalk concrete, it forms the backbone of modern infrastructure.

⏺Yet achieving high-quality, long-lasting concrete construction isn’t as simple as mixing cement, water, and aggregates.

⏺Numerous professionals and DIY builders make common mistakes that can compromise the structural integrity, appearance, and durability of concrete.

📜This article explores the most frequent concrete-related mistakes and provides practical advice on how to avoid them.

⭐️1. Misproportions of the Mix
The mistake:

⏺One of the most essential components of concrete work is achieving the right mix ratio.

⏺A standard mix of concrete is made up of cement, sand (fine aggregate), and gravel (coarse aggregate), along with water. If the ratios are incorrect, the concrete can become too weak or too brittle.

💫for example, too much water can enhance workability but compromise the strength of the ultimate product.

⏺Too little water can make the mix unworkable and lead to incomplete hydration with a resultant low development of strength.

🚧How to avoid:

* Use a reliable mix design appropriate to your specific project needs. For residential building work in general, a mix ratio of 1:2:3 (cement:sand:gravel) with a water-cement ratio of 0.4–0.6 is standard.

* Weigh rather than measure by volume, especially in large or major projects.

* Consult engineers or use standard mix designs from trusted sources such as the American Concrete Institute (ACI).

@etconp

👉በኢትዮጵያ የሪል እስቴት ገበያው በህዝብ ዘንድ ያለው እምነት እያሽቆለቆለ ነው ተባለ

በኢትዮጵያ ለሦስት አስርት ዓመታት ያለ ተቆጣጣሪ አካል ሲንቀሳቀስ የቆየውና በተደጋጋሚ ገንቢዎች ቃል በገቡት ጊዜ ቤቶችን ባለማስረከባቸው የሕዝብን እምነት ያጣው የሪል እስቴት ዘርፍ፣ በገበያው እንዲቆይ ከተፈለገ ለውጥ እንደሚያስፈልገው ተጠቁሟል።

በዚህም መሰረት፣ በቅርቡ የኢትዮጵያ የሪል እስቴት ገንቢዎች ማህበር ተቋቁሞ አባላቱን በራሱ ለመቆጣጠር ማቀዱን ይፋ አድርጓል።

ማህበሩ በኢትዮጵያ ግንባታ ዘርፍ ውስጥ ታዋቂ በሆኑ ግለሰቦች የተመሰረተ ሲሆን፣ የሪል እስቴት ገበያው አደገኛ እየሆነ መምጣቱንና የሕዝብ እምነት ማሽቆልቆሉን አጽንኦት ሰጥቷል።

ይህን ችግር ለመፍታትም ከሚመለከታቸው የመንግሥት አካላት ጋር በቅርበት በመሥራት የዘርፉን ልማት ለማፋጠንና ኢንቨስትመንትን ለመሳብ አቅዷል።

የማህበሩ መስራቾች፣ “የዘርፉን ስም ለመጠበቅ ራሳችንን በራሳችን እንቆጣጠራለን፤ እንዲሁም በገንቢዎችና በገዢዎች መካከል የሚፈጠሩ አለመግባባቶችን ለመፍታት የሚያስችል አሠራር እንዘረጋለን” ብለዋል።


የአዲስ አበባ ዩኒቨርሲቲ የከተማ ልማት ፕሮፌሰር ቶማስ ግርማይ በማህበሩ ይፋዊ ማስጀመሪያ ወቅት ባቀረቡት ጥናት፣ ከግማሽ የሚጠጉ የቤት ገዢዎች ከገንቢዎች ባገኙት ንብረት እንዳልረኩ አመልክተዋል።

ፕሮፌሰር ግርማይ “የሕዝቡ የሪል እስቴት ገንቢዎች ግንዛቤ በአሁኑ ጊዜ አሉታዊ ነው፤ የዘርፉም ገጽታ መስተካከል አለበት” ሲሉ አጽንኦት ሰጥተዋል።

የቤት እጥረት አሁንም ዋነኛ ችግር ሆኖ በቀጠለበት በዚህ ወቅት፣ የማህበሩ ምስረታ በዘርፉ ታማኝነትንና ተጠያቂነትን ለመመለስ ትልቅ ጥረት መሆኑን ባለሙያዎች ገልጸዋል።

Via capital ethiopia

@etconp

ታምራት  ፕሌት እና ጄቦልት አቅራቢ

📌ፕሌትና ጄቦልት በፈለጉት አይነት የተዘጋጀ አለን

♧ ሁሉን በአንድ ቦታ ለሁሉም ቅርብ

♧ ምስክራችን ስራችን

📍ኢትዮጵያ ዉስጥ የትም እንልክሎታለን

♧ ይደውሉልን ያማክሩን

0904040477
0994941708

👉Lets Answer On Comment

💫1. The creep strains are _

(a)  Caused due to dead loads only
(b)  Caused due to live loads only
(c)  Caused due to both dead loads and live loads
(d)  Independent of loads

💫2. Specific volume is reciprocal of _

(a)  Mass
(b)  Area
(c)  Volume
(d)  Mass density

💫3. Which of the following scales is the smallest one?

(a)  4 : 200000
(b)  1 cm = 5000 m
(c)  1 cm = 50 m
(d)  RF =1/50000

💫4. Consider the following statements in the case of stone masonry and find the correct statement

A.  Stone used should not be dumb bell-shaped
B.  Stone masonry section should always designed to take compressive and tensile stresses

(a)  Only A
(b)  Only B
(c)  Both A & B
(d)  None of the above

💫5. Fineness modulus of sand greater than _ will not be suitable for satisfactory concrete mix.

(a)  3.5
(b)  3.2
(c)  2.9
(d)  2.6

💫6. For limit state of collapse flexure, the maximum strain in concrete at the outermost compression fibre is taken equal to _.

(a)  0.002
(b)  0.02
(c)  0.0035
(d)  0.035

💫7. For flow through pipes, the laminar flow occurs, when Reynolds number is _.

(a)  Between 2000 and 4000
(b)  Less than 4000
(c)  More than 4000
(d)  Less than 2000

💫8. Give an example for flaky shape of aggregate

(a)  Pit sand
(b)  Crushed rock
(c)  Blown sand
(d)  Laminated rock

💫9. The S-curve is used for the _.

(a)  Development of synthetic unit hydrograph
(b)  Conversion of unit hydrograph of one duration to another
(c)  Estimation of peak flow of a storm hydrograph
(d)  Derivation of unit hydrograph from complex type of storm

💫10. For a given discharge, the efficiency of sedimentation tank can be increased by _.

(a)  Increasing the depth of the tank
(b)  Increasing the surface area of the tank
(c)  Decreasing the depth of the tank
(d)  Decreasing the surface area of the tank

@etconp