👉UNDERSTANDING ROAD LAYERS

💫Every strong and durable road you drive on rests on a powerful structure beneath, not just asphalt!

🏷Here’s the breakdown

1. Pavement (Surface Layer):
This is the visible top layer made of asphalt or concrete providing a smooth, safe, and waterproof surface for vehicles.

2. Base Course:
The load distributor! It transfers traffic loads from the surface to the lower layers. Usually made of crushed stones or gravel.

3. Sub-base:
Acts as a cushion and improves drainage. It reduces stress on the subgrade and prevents pumping of fine materials.

4. Subgrade:
The foundation of the entire pavement system made up of compacted natural soil. Its strength and stability determine the performance of the whole road.

#RoadConstruction #CivilEngineering #PavementDesign #GeotechnicalEngineering #InfrastructureDevelopment #ConstructionInsights #EngineeringEducation

@etconp

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👉Deflection Control in Beams and Slabs

1. Causes of Deflection

• Excessive load on the member.
• Inadequate stiffness or reinforcement.
• Creep and shrinkage in concrete.
• Long span or insufficient depth.

2. Permissible Deflection Limits (According to Codes)

• Span/250 for total deflection under all loads.
• Span/350 or 20 mm for deflection after finishes are applied.
• Codes like ACI, IS 456, and Eurocode specify these limits.

3. Methods of Deflection Control

• Increase the depth of the beam or slab.
• Provide adequate reinforcement.
• Use higher-grade concrete to reduce creep.
• Limit span-to-depth ratio.
• Provide prestressing in long spans.

4. Span-to-Depth Ratios (General Guidelines)

• Simply Supported Beam – 20
• Continuous Beam – 26
• Cantilever Beam – 7

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

@etconp

👉Airport Runway Design Basics

1. Introduction

Runway design is a crucial part of airport planning, ensuring safe aircraft take-off
and landing. Proper design considers aircraft type, load, weather, and localgeography.

2. Runway Orientation

Orientation is based on prevailing wind direction to minimize crosswindcomponents. Wind analysis for at least 10 years is preferred.

3. Runway Length

Length depends on aircraft type, elevation, temperature, and gradient. Higherelevation and temperature require longer runways.

4. Runway Width

Width varies depending on aircraft class. For example, Code E aircraft require aminimum width of 45 meters.

5. Runway Gradient

The longitudinal gradient should not exceed 1.5%. Transverse gradient ensuresproper drainage, typically 1.5% to 2%

6. Runway Surface

Common materials include flexible pavements (asphalt) and rigid pavements(concrete). The surface must be smooth, durable, and well-drained.

7. Runway Markings and Lighting

Runway markings include threshold, centerline, and touchdown zone markings.

Lighting helps in low visibility—types include edge lights, approach lights, andcenterline lights.

8. Runway Safety Areas

Runway End Safety Area (RESA) is provided beyond the end of the runway strip tominimize damage in case of overrun or undershoot.

9. Drainage and Maintenance

Proper drainage is essential to avoid standing water. Regular maintenanceensures surface integrity and friction.

10. Conclusion

A well-designed runway ensures efficient and safe airport operation, supportingboth current and future aviation needs.

@etconp

👉JOB VACANCY

💫1. Office Engineer
Position Title: Jr. Office Engineer
Employment: Full-Time
📍Place of Work: Addis Ababa

⏺Main Duties & Responsibility:
·       Prepares technical drawings, reports, and as-built documentation.
·       Assists in tender preparation (drawings, quantity take-offs).
·       Coordinates site reporting and material requisitions.
Qualification: BSc. In Civil /Hydraulics and water resources Engineering
Experience: one year and above
Salary: as per company scale

💫2. Site Engineer

Position Title: Site Engineer
Employment: Full-Time
Place of Work: Addis Ababa and Project site

⏺Main Duties & Responsibility:
Ensure all work adheres to approved drawings, specifications, and quality standards.
Oversee daily construction work on-site.
Prepare and submit regular progress reports, site diaries, and other documentation.
Qualification: BSc. In Civil /Hydraulics and water resources Engineering
Experience:  above 2 year in water construction
Salary: as per company scale

💫3. Electrician

Position Title: Electrician
Employment: Full-Time
Place of Work: Addis Ababa and Project site

⏺Main Duties & Responsibility:
·       Install electrical and electromechanical components.
Qualification: Level 3 qualification in electrical installations. 
Experience:  one year and above in Specialized training in solar PV systems.
Salary: as per company scale

📩How to apply

⏺Interested applicants fulfilling the above requirement can send a non-returnable application, CV & Copies of relevant documents within 5 days from the date of announcement to telegram username @MMTRD2018 or in person, around Bubula 93Mazoria Infront of Enrich plaza  3rd floor office number 304.

📞For further information call  +251938444000/ +251938444400

@etconp

👉What is a compression test on concrete?

💫A compression test evaluates the ability of a concrete specimen to withstand a compressive load without failing.

⏺It helps determine whether the concrete mix meets the required strength for the intended structure.

🚧The test is typically conducted on concrete cubes or cylinders cured for specific durations, most commonly 7 and 28 days.

@etconp