YELCON ENGINEERING
137 subscribers
16 photos
7 videos
7 files
53 links
From all to all by all
Download Telegram
/start

⏺Admixtures are beneficial but risky if misused.

⏺Correct selection, accurate dosage, and proper testing are essential to avoid negative effects.

@etconp

πŸ‘‰What Is Scaffolding in Building Construction?

πŸ’«Scaffolding is a temporary structure made of steel, aluminum, or timber that is erected around or inside a building to provide safe access and working platforms for workers during construction, repair, or maintenance activities at height.

🚧Purpose of Scaffolding in Building Construction

⏺1. Safe Working Platform
Provides a stable platform for workers to stand, sit, or place tools and materials.
Reduces the risk of falls and accidents when working at height.

⏺2. Access to High Areas
Enables workers to reach elevated parts of a building such as walls, columns, beams, and ceilings.
Essential for multi-storey buildings.

⏺3. Support for Construction Activities
Scaffolding is used during:
Brick and block masonry
Plastering and rendering
Painting and finishing works
Installation of windows, cladding, and services
Repair and maintenance work

⏺4. Material Handling
Allows safe storage of light materials (bricks, tools, paint buckets) near the work area.
Improves work efficiency and reduces movement time.

⏺5. Worker Safety
Fitted with guardrails, toe boards, and platforms to prevent falling.
❇️Helps comply with construction safety standards.

🏷Common Types of Scaffolding

⏺Single scaffolding – mainly for brickwork
⏺Double scaffolding – used in stone masonry
⏺Cantilever scaffolding – when ground support is not possible
⏺Suspended scaffolding – for painting and faΓ§ade work
⏺Mobile scaffolding – movable type for light works

⭐️Simple Definition

Scaffolding is a temporary structure used in building construction to support workers and materials and to provide safe access to work at height.

@etconp

πŸ‘‰What is Formwork in Building Construction?

πŸ’«Formwork is a temporary or permanent mold used in construction to shape and support fresh concrete until it hardens and gains enough strength to support itself.

πŸ”°In simple words, formwork is the container into which concrete is poured to get the required shape, size, and position of structural elements.

🚧Purpose of Formwork in Building Construction

⏺Formwork plays a very important role in concrete construction.

⭐️Its main purposes are:

🚧1. To Give Shape and Size

⏺Formwork ensures concrete members like slabs, beams, columns, walls, and foundations are formed according to the design drawings.

🚧2. To Support Fresh Concrete

⏺Fresh concrete is heavy and fluid. Formwork holds the concrete in place until it hardens and becomes strong enough.

🚧3. To Maintain Alignment and Level

⏺It keeps structural elements straight, level, and properly aligned, avoiding deformation.

🚧4. To Achieve Good Surface Finish

⏺Proper formwork provides a smooth and neat surface, reducing plastering and finishing work.

🚧5. To Ensure Safety During Construction

⏺Strong and well-fixed formwork prevents collapse, protecting workers and materials.

🏷Common Materials Used for Formwork

⏺Timber/Wood – most common and easy to use
Plywood – smooth finish, reusable

⏺Steel – strong, durable, reusable many times

⏺Aluminum – lightweight, fast construction

⏺Plastic – reusable and water-resistant

πŸ“Where Formwork Is Used

⏺Columns
⏺Beams
⏺Slabs
⏺Foundations
⏺Staircases
⏺Shear walls

@etconp

πŸ‘‰FIRST SAFETY

⚑️The first safety requirements on high-rise building construction are critical because work is done at great heights, with heavy materials, machinery, and many workers.

🚧These safety measures must be in place before and during construction to prevent serious accidents.

πŸ’«1. Site Safety Planning (Before Work Starts)
Prepare a Site Safety Plan (SSP)

⏺Conduct risk assessment for height work, lifting, fire, and electrical hazards
⏺Provide safety induction training for all workers
⏺Display safety signs, emergency contacts, and rules clearly on site

πŸ’«2. Personal Protective Equipment (PPE) – Mandatory

🏷Every worker must wear:
⏺Safety helmet (hard hat)
⏺High-visibility vest
⏺Safety boots (steel toe)
⏺Gloves
⏺Safety goggles
⏺Full body safety harness for work at height

πŸ’«3. Fall Protection Systems (Most Important)

⏺Guardrails at slab edges and openings
⏺Safety nets below work areas
⏺Lifelines and anchor points
Covered floor openings
⏺Strict rule: No work at height without fall protection

πŸ’«4. Scaffolding & Formwork Safety

⏺Scaffolding must be designed, erected, and inspected by competent persons
⏺Strong base and proper bracing
⏺Safe access ladders and platforms
⏺Formwork must be stable and checked before concreting

πŸ’«5. Lifting & Crane Safety

⏺Only certified crane operators
⏺Regular inspection of cranes, hoists, slings
⏺No lifting over workers
⏺Clear communication using signals or radios

πŸ’«6. Electrical Safety

⏺Proper grounding (earthing)
⏺Use insulated cables and tools
⏺Temporary power systems well protected
⏺No damaged wires or exposed connections

πŸ’«7. Fire Safety & Emergency Preparedness

⏺Fire extinguishers on every floor
⏺Safe storage of flammable materials
⏺Emergency evacuation routes
⏺First-aid kits and trained first-aiders
⏺Emergency drills

πŸ’«8. Housekeeping & Access Control

⏺Clean walkways and working areas
⏺Proper waste disposal
⏺Secure site fencing
⏺Restricted access for unauthorized persons

πŸ’«9. Safety Supervision & Monitoring

🎲Appoint a Safety Officer

⏺Daily safety inspections
⏺Toolbox meetings
⏺Immediate correction of unsafe acts

πŸ”‘ Key Rule:

Fall protection + PPE + supervision = life-saving combination in high-rise construction

@etconp

πŸ‘‰Sections of Beam (Based on Reinforcement)

πŸ’«Reinforced concrete beams are classified into Balanced, Under-Reinforced, and Over-Reinforced sections based on the amount of steel provided.

🚧1) Balanced Section

▢️A balanced section is one in which both concrete and steel reach their permissible stresses at the same time.

β€’ Concrete reaches its maximum compressive strain
β€’ Steel just reaches its yield stress
β€’ Neutral axis depth = critical depth

▢️Failure nature:

β€’ Sudden and brittle

πŸ“œRemarks:

β€’ Ideal theoretical condition
β€’ Rarely used in practice due to lack of warning before failure

🚧2) Under-Reinforced Section

▢️An under-reinforced section has less steel than required for a balanced section.

β€’ Steel yields first before concrete crushes
β€’ Neutral axis depth < critical depth

πŸ“œFailure nature:

β€’ Ductile failure
β€’ Large deflection and visible cracks before failure

🎲Advantages:

β€’ Gives sufficient warning before collapse
β€’ Safe and preferred in design

πŸ”°Used in practice:

β€’ YES (most commonly used in RCC design)

🚧3) Over-Reinforced Section

▢️An over-reinforced section has more steel than required for a balanced section.

β€’ Concrete crushes before steel yields
β€’ Neutral axis depth > critical depth

πŸ“œFailure nature:

β€’ Brittle failure
β€’ Sudden collapse without warning

🎲Disadvantages:

β€’ Unsafe
β€’ Not recommended in RCC design

πŸ”°Used in practice:

β€’ NO (avoided by design codes)

πŸ“Comparison Summary

❇️Balanced section:

β€’ Steel and concrete fail together
β€’ Brittle failure

❇️Under-reinforced section:

β€’ Steel fails first
β€’ Ductile and safe

❇️Over-reinforced section:

β€’ Concrete fails first
β€’ Brittle and unsafe

@etconp

πŸ‘‰Design Requirements for Solid Slab Design (Building Construction)

🚧A solid slab is a reinforced concrete slab that transfers loads directly to beams, walls, or columns.

πŸ’«To ensure safety, serviceability, and economy, the following requirements must be satisfied.

🏷1. Applicable Design Codes

⏺Design must comply with recognized standards, for example:
EBCS
ACI 318 (USA)
Eurocode 2 (EN 1992)
BS 8110
IS 456
Local building codes (as applicable)

🏷2. Span & Support Conditions

πŸ“Identify whether the slab is one-way or two-way:

▢️One-way slab: Longer span / shorter span β‰₯ 2
▢️Two-way slab: Longer span / shorter span < 2

⏺Define support type: simply supported, continuous, or cantilever.

🏷3. Loads to Be Considered
/start

⏺All relevant loads must be included:
❇️Dead load: Self-weight of slab + floor finishes
❇️Live load: Occupancy load (residential, office, storage, etc.)
❇️Partition wall load (if any)
Environmental loads: seismic and wind (indirect effect on slabs)
❇️Apply load combinations as per the code.

🏷4. Slab Thickness (Depth)

⏺Minimum thickness to control deflection:

⏺Simply supported slab:
h β‰₯ L / 20
🎲Continuous slab:
h β‰₯ L / 26
⏺Cantilever slab:
h β‰₯ L / 10
(L = effective span)
⏺Also check deflection limits according to code.

🏷5. Material Requirements

⏺Concrete grade: Usually β‰₯ C25/30
⚑️Reinforcement steel:
⏺Yield strength (fy) = 415 MPa or 500 MPa
⏺Materials must meet durability and exposure conditions.

🏷6. Reinforcement Design
Main reinforcement: Along the direction of bending

❇️Distribution reinforcement: Perpendicular to main bars
❇️Minimum reinforcement:
Typically β‰₯ 0.12% of gross concrete area (for HYSD bars)
❇️Bar spacing:
⏺Main bars ≀ 3d or 300 mm
⏺Distribution bars ≀ 5d or 450 mm (d = effective depth)

🏷7. Bending Moment Check
Calculate design bending moments.

🚧Ensure: Mu ≀ Ο†Mn (or equivalent safety format per code)

🏷8. Shear Check

⏺Slab should resist one-way shear without shear reinforcement in most cases.

🚧Ensure:
Vu ≀ Vc
If Vu > Vc β†’ increase slab thickness.

🏷9. Deflection Control

⏺Satisfy span-to-depth ratios.
Long-term deflection (creep + shrinkage) must be within limits.

🏷10. Crack Control

⏺Limit bar spacing and stress in steel.
⏺Proper curing is essential to minimize cracking.

🏷11. Cover to Reinforcement
Minimum clear cover (typical values):

⏺Interior slab: 20–25 mm
⏺Exposed or aggressive environment: 30–40 mm

🏷12. Construction & Detailing Requirements

⏺Proper formwork alignment
Correct bar placement and spacing Adequate compaction (vibration)
⏺Minimum curing period (7–14 days)

🏷13. Serviceability & Durability

⏺Control cracking and deflection Ensure fire resistance and long-term durability
⏺Consider waterproofing for roofs and wet areas
This media is not supported in the widget
VIEW IN TELEGRAM
/start

αˆ‰α‰ƒαˆ΅ 2:11
α‹›αˆ¬ α‰ α‹³α‹Šα‰΅ αŠ¨α‰°αˆ› αˆ˜α‹΅αŠƒαŠ’α‰΅ αŠ₯ርሱም αŠ­αˆ­αˆ΅α‰Άαˆ΅ αŒŒα‰³ α‹¨αˆ†αŠ α‰°α‹ˆαˆα‹Άαˆ‹α‰½αŠ‹αˆαŠ“α’

α‹¨αŒŒα‰³α‰½αŠ• α‹¨αŠ’α‹¨αˆ±αˆ΅ αŠ­αˆ­αˆ΅α‰Άαˆ΅ αˆ˜α‹ˆαˆˆα‹΅ αŠ₯αŒα‹šαŠ α‰₯αˆ”αˆ­ α‹“αˆˆαˆαŠ• α‹¨α‹ˆα‹°α‹°α‰ α‰΅αŠ“ α‹¨αˆ°α‹αŠ• αˆαŒ… αŠƒαŒ’α‹«α‰΅ α‹­α‰…αˆ­ α‹«αˆˆα‰ α‰΅ αŠ₯αŠ•α‹°αŒˆαŠ“ αŠ₯αŒα‹šαŠ α‰₯αˆ”αˆ­  αŠ¨αˆ°α‹ αˆαŒ†α‰½ αŒ‹αˆ­ α‰ αˆ›α‹­α‰ αŒ αˆ΅αŠ“ α‰ αˆ›α‹­α‰ αˆ‹αˆ½ αˆ˜αŠ•αŒˆα‹΅ αˆ…α‰₯αˆ¨α‰΅ α‹¨αˆ˜αˆ°αˆ¨α‰°α‰ α‰΅ αŠα‰ αˆ­!
α‰ αŠ αŒ­αˆ­ α‰ƒαˆ αŠ₯αŒα‹šαŠ α‰₯αˆ”αˆ­ αŠ¨αˆ°α‹ α‹˜αˆ­ αŒ‹αˆ­ αŠ₯αŠ•α‹°αŒˆαŠ“ α‹¨αˆ†αŠα‰ α‰΅ αŠα‹!

#αŠ₯αŠ•αŠ³αŠ•_αˆˆα‹šαˆ…_α‰³αˆ‹α‰…_α‰ αŠ αˆ_αŠ α‹°αˆ¨αˆ³α‰½αˆπŸŽ„πŸŽ„πŸŽ„πŸŽ„πŸŽ„
❀1πŸ™1
Building Project Manager -
Samket Engineering abd Construction
Full Time
Addis Ababa,
Megenanya to the Way of Gurd Sholla Road Near to Century Mall, on TS BG Building
4th Floor Human Resource Dep,
Addis Ababa, Project
January 25, 2026 - February 6, 2026

Job Requirement
Qualification: MSc/B.Sc in civil engineering or related fields
Experience: 12 years & above experience
Specific Experience: 6 Years & above Experience in Project Managerial Position
Qty:4
Salary: Negotiable and Attractive

Place of Work: A.A & Project

How to Apply
Note:- Interested applicants are invited to send their non-returnable application with CV and copies of relevant documents through the following address within 7 consecutive days from the first date of announcement.

Incomplete application will not be considered

Address:- Addis Ababa,Megenanya to the Way of Gurd Sholla Road Near to Century Mall,on TS BG Building 4th Floor Human Resource Dep;t Tel: 0116 67 67 38/0116 67 67 39
Principal Property Valuation Officer

Full Time
Nib International Bank
Dire Dawa District office
kazira Nib International Bank Building 3th Floor,
Addis Ababa
Addis Ababa
January 18, 2026 - January 31, 2026

Job Requirement
Educational Qualifications: M.Sc/B.Sc. in Civil Engineering, Architecture, Construction Management, Building Engineering or related fields of study
Work Experience & Required Skills: 5/7 years of relevant work experience, of which 2 years as Senior Property Valuation Officer or other equivalent related job positions
Salary: as per the Bank’s scale

Place of Work: Head Office

How to Apply
NB: Please specify the place where you are interested to apply.

Deadline: Ten consecutive days from the date of this vacancy announcement.

Salary: Per the Salary Scale of the Bank and attractive fringe benefits.

Place of Registration:

Interested applicants shall submit their CVs and non-returnable supporting documents in person to Nib International Bank Dire Dawa District office kazira Nib International Bank Building 3th Floor. Tel.025-2112808 Interested applicants shall submit their CVs and non-returnable supporting documents only through this link Address https://bit.ly/NIB-External-Vacancy online.Tel.011-5581132
Principal Property Valuation
Talent Acquisition and Management Department

NIB International Bank
Addis Ababa
Ethiopia
αŠ­αα‰΅ የαˆ₯ራ ቦታ αˆ›αˆ΅α‰³α‹ˆα‰‚α‹«
α‹¨α‹ˆαŒ£α‰ α‰΅ α‰€αŠ• α‰³αŠ…αˆ£αˆ₯ 26/2018 α‹“.ም
SATCON CONSTRUCTION PLC
has seeking Qualified Professionals in the following positions.

1. Project Manager for Infrastructure project.

Required Qualification: Bsc Degree in Civil Engineering or related fields.

General Experience 10 years
Specific Experience in similar position:- 5years
( in road or site work experience is more advantageous)
Salary: negotiable and attractive
Place of work; Debire Birhan.

2)Equipment and Maintenance Administration Manager.
Required Qualification: Diploma or Bsc Degree in Mechanical Engineering or related fields.
General Experience 10 years
Specific Experience in similar position:- 5years
Salary, negotiable and attractive
Place of work: Addis Ababa

N.B Experience from Construction companies are more advantageous.
Place of work, Addis Ababa.
How to apply,
send your application with CV and academic credentials and Experience via Only
Telegram only:0944359775.
Deadline : January 4, 2026 - January 15, 2026
How to Apply
NB: Interested and qualified applicants who meet the above requirements are invited to submit their copies of testimonials with update CV and work Experience within 7 working days in persons or by Email: info@centuryaddiscon.com.et
Address: Bole on Atlas Road Above 2000 Habesha Restaurant or Near Aya or Mado Hotel at Century Executive Tower 17th Floor office Human Resources Development and Management Department
For More information: Any question please contact us at 0116393451
Dead line : January 4 - January 24 / 2026
How to Apply
Interested applicants who meet the above requirements invited to submit their C.V. Along with non-returnable credentials within 6  Working days from the date of this announcement to Human Resource Team No. 9 in person ADDRESS
YENCOMAD CONSTRUCTION
AT THE BACK OF DEMBEL CITY CENTER, HUMAN RESOURCE TEAM
Tel. 0115 53 37 66, Addis Ababa, Ethiopia